Does CoyoteConnector's connectionLinger option work?
Hi all, I am having problems with the configuration of a Tomcat 4.1.27 server on a Windows XP box. Although I use the following connector configuration in my server.xml file: Connector className='org.apache.coyote.tomcat4.CoyoteConnector' acceptCount='10' connectionLinger='-1' connectionTimeout='5000' debug='0' enableLookups='false' maxProcessors='20' minProcessors='5' port='8080' tcpNoDelay='true' useURIValidationHack='false'/ I am getting lots of TIME_WAIT sockets in my computer. The client app is located in a remote machine, and since I disabled the SO_LINGER option on it, I stopped to get TIME_WAITs in the client side. Setting the connectionLinger attribute to -1 should have made accept sockets to close inmediately without passing by this state (at least, that is the behaviour I am getting in the client side). Is there something wrong in my statements, or I have found a bug? Thanks in advance, Rodrigo Ruiz -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.6 - Release Date: 07/02/2005 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Is it possible to setup a custom ServerSocketFactory?
Hi all, I am using Tomcat 4.1.27, on a Windows XP SP2 host. I have tried to implement a custom ServerSocketFactory, and configured my CoyoteConnector to use it as its factory in the server.xml file. But, although an instance is created on startup, it seems no call is made to any of its createSocket() methods. Is there anything special that must be done for the connector to use my factory? It seems that CoyoteConnector is creating the ServerSocket by itself, or at least, without asking the specified factory. Thanks in advance, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How can I display number of requests over the past n seconds?
Mmmm, I think people is answering more than one question ;-)
If you need to be strict with respect to the timings, that is, you need
exactly the number of requests in the past five seconds counting from
the moment your request is done, you will need the solution proposed by
Tim. Just remember to synchronize the access to the list, to prevent
ConcurrentModification exceptions while you iterate over the list to get
the counter values :-)
If the time buckets idea works well for you, both Yoav and Justin
proposals are good. I just prefer Yoav one because I guess the cost
associated to the hash function, even if it is simple, is greater than
the associated to a thread that is sleeping most of the time (I mean, in
processing time terms).
I think Yoav idea could be implemented like this (with a variation on my
own ;-):
public class Historic extends Thread {
private static final int NUM_COUNTERS = 6;
private static final int INTERVAL = 5000;
private int[] counters = new int[NUM_COUNTERS];
private int pos = 0;
public Historic() {
super();
this.setDaemon(true);
}
public void run() {
try {
while (true) {
sleep(INTERVAL);
synchronized (this) {
pos = (pos + 1) % NUM_COUNTERS;
counters[pos] = 0;
}
}
}catch (InterruptedException e) {
}
}
public synchronized void addRequest() {
counters[pos] += 1;
}
public int[] getCounters() {
int[] copy;
int posCopy;
synchronized (this) {
System.arraycopy(counters, 0, copy, 0, NUM_COUNTERS);
posCopy = pos;
}
int[] values = new int[NUM_COUNTERS];
int count = 0;
int index = posCopy;
for (int i = 0; i NUM_COUNTERS; i++) {
count += copy[index];
values[i] = count;
index = (index == 0 ? NUM_COUNTERS : index) - 1;
}
return values;
}
}
Just instantiate the class and start it in your Filter initialization,
and call addRequest() on each received request. The getCounters() gives
you the number of requests in each time slice. Ah, and remember to
interrupt it on Filter finalization :-)
There is no guaranty that the pos variable will be changed exactly
each five seconds, as the sleep() method is not accurate by design. In a
highly loaded server with only one CPU, the time slicing will become
worse. If you detect the thread scheduling is too much biased, you can
raise its priority.
If this is not enough, you will have to calculate the cursor position in
each request, implementing the hashtable proposed by Justin:
public class Historic {
private static final int NUM_COUNTERS = 6;
private static final int INTERVAL = 5000;
private int[] counters = new int[NUM_COUNTERS];
private int pos = 0;
private long ts = System.currentTimeMillis();
public Historic() {
}
public synchronized void addRequest() {
adjust();
counters[pos] += 1;
}
public int[] getCounters() {
int[] copy;
int posCopy;
synchronized (this) {
adjust();
System.arraycopy(counters, 0, copy, 0, NUM_COUNTERS);
posCopy = pos;
}
int[] values = new int[NUM_COUNTERS];
int count = 0;
int index = posCopy;
for (int i = 0; i NUM_COUNTERS; i++) {
count += copy[index];
values[i] = count;
index = (index == 0 ? NUM_COUNTERS : index) - 1;
}
return values;
}
private void adjust() {
long now = System.currentTimeMillis();
while (now - ts = INTERVAL) {
pos = (pos + 1) % NUM_COUNTERS;
counters[pos] = 0;
ts += INTERVAL;
}
}
}
HTH,
Rodrigo Ruiz
I need to display on a .jsp page the number of requests for Tomcat in the past 5 / 10 / 15/ 30 / 45 / 60 seconds. I've already implement a Filter will count the total number of requests. I did this with a static int, which is incremented everytime a request comes in. But what should I do so that I can show number of request over past time intervals? Since the present time is always changing, the past n seconds is constantly changing also.
Thanks in advance,
Tom
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Re: detecting the shutdown of tomcat in a servlet
There is more than one way :-) - From within a servlet, add a shutdown hook with Runtime.getRuntim().addShutdownHook() - Create a ServletContextListener, and implement the clean stop of your daemon in the listener contextDestroyed() method - Create an initialization servlet, and implement the clean stop in its destroy() method and probably a few more if you use specific Tomcat classes. I would not use the first option unless really necessary, as it seems to me a too much low level solution. My favourite is the second option, as this is what ServletContextListeners are for. You could start and stop the thread from this listener. The second and third options will perform the thread stop when the context or the container are shut down. This includes a context stop from the admin webapp. Whether this is good or bad for your purposes depends on the actions you need to perform. I suppose you do not want your thread to keep running if you stop the webapp, because restarting the webapp would lead to have two daemon threads :-) HTH, Rodrigo Ruiz STOCKHOLM, Raymond wrote: In my tomcat 4.1.30n, I have a webapp in which a deamon Thread (started automatically) is scheduled to send automatic mails every morning. I would like to make a clean stop of my deamon when tomcat shutdowns. How can I detect that tomcat is shuting down ? Raymond Stockholm Aubay Luxembourg 51, Rue de Strasbourg L-2561 LUXEMBOURG Tel : +352 29 92 50 31 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.727 / Virus Database: 482 - Release Date: 27/07/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Problem with proper shutdown of tomcat
Maybe you have some non-daemon threads running. This would prevent the JVM from exiting. I would do the following: - Once the java process is frozen, ask it a thread stack dump (I do not remember well, but I think in Linux you must send the process a QUIT signal) - In the trace you should see all threads still alive. Check if any of them is yours. Such a thread could be the problem source. - Sometimes converting the thread in a daemon is enough. Other times you need to ensure a clean stop, in which case you could implement it through a ServletContextListener. HTH, Rodrigo Ruiz dejw wrote: Hi, I have tomcat 4.1.30 installed on linux red hat 9 with java version 1.4.1_03. Sometimes when I shutdown tomcat by using shutdown script it remains java process in memory which I have to kill manually. Only then I can start up tomcat again. What can be the reason of this? I'm using GridSphere portal framework with gridportlets whithin the tomcat, maybe some bad written portlets or servlets are able to freeze java process of tomcat? Dawid Szejnfeld, PSNC - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.727 / Virus Database: 482 - Release Date: 27/07/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to limit time for Connector threads?
rlipi wrote: I am going to try Antonio's proposal. Also I would like to try some profiling tool. But it will take a lot of time to find and repair something, I think. If you are dealing with a programming error like an infinite loop or a deadlock, you may have better luck using a debugger, rather than a profiling tool :-) Most of the popular IDEs (JBuilder, Eclipse, Idea, etc) can do remote debugging, so you just need to start your server (or a copy of it) in debug mode and connect to it from the IDE. In case you do not have any IDE, my recommendation is Eclipse, as it is free and needs no complicated installation. In case you do not know how to use remote debugging, I am pretty sure you can search through the archives in this list, or do some googling ;-) Hope it helps you, Rodrigo Ruiz -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.678 / Virus Database: 440 - Release Date: 06/05/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: specifying location of confg file
The standard way to specify configuration data in J2EE is through JNDI. With this, I am not telling you to drop your config file, but specify its path there ;-) In Tomcat, the JNDI tree is specified in the server.xml descriptor. You will find good documentation on this topic on the tomcat web pages Rodrigo Ruiz Milt Epstein wrote: On Thu, 6 May 2004, Arora, Avinash wrote: Hi, How can we specify the location of config file, so that we don't have to hardcode it in our code. Thanks. You can specify the location in the config file. Oh wait, never mind. Other alternatives are specifying it as init-param's (either servlet or context) in web.xml. Still somewhat hard-coded, but not as bad as putting it in the servlet code itself. A bit of a bootstrapping issue here. Also, I think I saw something here recently about being to specify certain init-param's in server.xml, not sure of the details, maybe that's a possibility. Milt Epstein Research Programmer Integration and Software Engineering (ISE) Campus Information Technologies and Educational Services (CITES) University of Illinois at Urbana-Champaign (UIUC) [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.678 / Virus Database: 440 - Release Date: 06/05/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: What is accepted way to read/write files in Tomcat ?
Some thoughts on this matter :-) If I am not wrong, the servlet specification states that the directory pointed by javax.servlet.context.tempdir can be cleaned on restart (it is left to the container implementation). I think Tomcat does not do such a cleaning, but other containers (or even future Tomcat versions) are perfectly allowed to do so :-S So, sticking to the specification, I guess the only way left to define such a location is specifying it through JNDI. This means that any webapp needing (for example) to work as file server are unnecessary difficult to implement. Having to implement a custom servlet that does the same as the default one, but accessing another directory out of the context, sounds to me like reinventing the wheel :-D Having war deployments this lack of functionality, it has always seemed strange to me that the specification only considers mandatory this type of deployment. Rodrigo Ruiz Mike Curwen wrote: Is it legitimate depends on who you talk to. ;) Purists (I don't mean that negatively) would remind you that the only 'guaranteed' filepath available is the javax.servlet.context.tempdir . And getRealPath() would blow up on you, if you were running your webapp from a WAR file. However, if *you* know that your app will only ever be used unpacked, then fully document this requirement, and go ahead and use getRealPath(). -Original Message- From: Antony Paul [mailto:[EMAIL PROTECTED] Sent: Thursday, April 15, 2004 12:28 AM To: Tomcat Users List Subject: What is accepted way to read/write files in Tomcat ? Hi all, What is the best way to read and write file(the file locations are inside context) in a servlet container. I was able to read file using getResourceAsStream() but writing using URLConnection().getOutputStream() failed and throws protocol doesn't support output - UnknownServiceException. Is it legitimate to use the getRealPath() to get the context root and write the file ? Antony Paul - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.658 / Virus Database: 421 - Release Date: 09/04/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
How to enable cipher suites in Tomcat
Hi all, is there any way to enable a specific cipher suite for SSL connections in Tomcat? The current project I am working in requires data encryption, but not server authentication, so enabling an anonymous cipher suite would fit my requirements without needing to create a certificate. Thanks in advance, Rodrigo Ruiz -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.642 / Virus Database: 410 - Release Date: 24/03/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Réf. : RE: How to know when Tomcat has completed startup?
AFAIK, the ServletContextListener initialization event is fired before Tomcat starts listening to external requests, so they won't work for you. SessionListeners will be executed on a request basis, as their first execution will be fired on the first request asking for a session to be created. Depending on your requirements this could be good enough... or not. You decide ;-) If I had undestood well, you want to invoke some JSP from within your own web-app during initialization, to do some data pre-generation. Does your JSP performs all operations, or does it delegates in another class? In my opinion: a) If your JSP (or Action if you use struts) is performing the operation itself, I would refactor the code and create a Helper class containing the necessary logic. b) If your logic is in a sepparate class, you could probably call its methods directly from a ServletContextListener, without needing to perform a JSP invocation. From a ServletContextListener you do not have access to a ServletResponse or ServletRequest, as there is no request in process, but you have access to the ServletContext, and many times it provides enough information for data preparing tasks. HTH, Rodrigo Ruiz [EMAIL PROTECTED] wrote: if your application is a struts one, you can do that with struts plugin mechanism. ___ NATEXIS ASSET MANAGEMENT Meissa SAKHO 01 58 19 45 71. . . . . . . . . . . . (84571) [EMAIL PROTECTED] Peter Guyatt [EMAIL PROTECTED] 16/02/2004 14:26 Veuillez répondre à Tomcat Users List Pour : Tomcat Users List [EMAIL PROTECTED] cc : Objet : RE: How to know when Tomcat has completed startup? What about using a session listener. Why not call your method in the constructor for the SessionListsner Pete -Original Message- From: James Neville [mailto:[EMAIL PROTECTED] Sent: 16 February 2004 12:38 To: [EMAIL PROTECTED] Subject: How to know when Tomcat has completed startup? Hi all, I'm trying to get a certain method within my startup class to *only* execute after Tomcat startup has fully completed. I understand I can implement a LifecycleListener, but there only seems to be before/after start/stop events. (i'm not sure that Lifecycle.AFTER_START_EVENT refers to 'startup is complete', or 'startup event was requested') In short, as part of my Startup procedure, we pre-generate(if rqd) a fornightly clandar of 'events' from some JSPs on the same Tomcat instance. The problem is mainly that we also use Apache/JK2, so a HTTP 500 error is generated (the Apache connection can be made, but Tomcat is not yet available), unless we can defer until Tomcat has started. I could, of course, defer the event for a few minutes, but that doesn't strike me as much of a graceful approach. I'm assuming this is probably pretty simple? Any pointers would be much appreciated. (not google.com, been all morning in there! :) ) James - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] L'integrite de ce message n'etant pas assuree sur internet, Natexis Banques Populaires ne peut etre tenu responsable de son contenu. Toute utilisation ou diffusion non autorisee est interdite. Si vous n'etes pas destinataire de ce message, merci de le detruire et d'avertir l'expediteur. The integrity of this message cannot be guaranteed on the Internet. Natexis Banques Populaires can not therefore be considered responsible for the contents.Any unauthorized use or dissemination is prohibited. If you are not the intended recipient of this message, then please delete it and notify the sender. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to know when Tomcat has completed startup?
If I had undestood well, you want to invoke a servlet from within your own web-app during initialization, to do some data pre-generation. What about isolating the logic of your event management in a helper class? This way you could call its methods from within your ServletContextListener without needing to wait for the servlets being able to respond. Just add your helper instance to the context as an attribute in the ServletContextListener, to be sure you use the same instance from within your timer servlet, or make it a singleton :-) HTH, Rodrigo Ruiz James Neville wrote: Jose, James, do you need the servlets to be already initialized??? Yes, and they are all defined in web.xml. The timer servlet that processes the calendars is the last to load. Another thing to consider is that the connector between Tomcat and Apache is also set up. Because Tomcat and Apache may be completly set up, but the connector takes a little longer (at lest in my case) therefore you may get a HTTP Error. This is what causes me HTTP 500 errors. The servlets are in fact all instantiated, but they are just not available on port 80 until JK2 has completed whatever it does on startup. The best thing I can think of is start the timer in a thread, and defer the thread from processing the action for a nominal duration (1/2 mins?). Still seems like a dirty way of doing it though. Maybe I should talk to the JK2 developers. Thanks James. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
How to get a thread stack dump programmatically
Hi all, is there any way to get a stack trace of a given thread? I want to obtain a full thread stack dump from a JSP, just like the one obtained via kill -QUIT, but I do not find any method in the Thread class that could be used to get this information. I seem to recall that some code was posted some time ago in this list, but I have not found it in the archives. Any ideas? PS: What I really want to do is a tool for detecting deadlocks via thread dump analysis :-) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to get a thread stack dump programmatically
My problem is I want a full stack dump, so I need to obtain stack traces from all threads, even those out of my control. Specifically, I would like to obtain a stack thread from all Tomcat worker threads, and if they are in a deadlock state, I cannot print their stack trace from within them ;-) I know it is technically possible, because there are some commercial libraries that do it. For example, BEA systems seems to have an implementation, as from their javadocs: http://edocs.bea.com/wljrockit/docs142/jmapi/javadoc/Management%20API/com/bea/jvm/ThreadSystem.html But I do not know if that implementation is only for their JRockit virtual machine, or they use JNI to access internal JVM data, or if there is something else involved. I am implementing a rather complex server, and detecting / reporting a deadlock condition would be a great advantage in the development process. Anyway, thanks for your comments :-) Thomas Kellerer wrote: Rodrigo Ruiz schrieb: Hi all, is there any way to get a stack trace of a given thread? I want to obtain a full thread stack dump from a JSP, just like the one obtained via kill -QUIT, but I do not find any method in the Thread class that could be used to get this information. I seem to recall that some code was posted some time ago in this list, but I have not found it in the archives. Any ideas? PS: What I really want to do is a tool for detecting deadlocks via thread dump analysis :-) Create an exception within that thread, and write it's stack dump via a StringWriter into a String Thomas - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to get a thread stack dump programmatically
Thanks Yoav, do you remember some keyword I could use to find that code
in the archives? I have searched with no luck :-(
I have this code section:
List list = getAllThreads();
for (Iterator it = list.iterator(); it.hasNext(); ) {
Thread t = (Thread)it.next();
String strace = getStackTrace(t);
}
I know how to get a list of all threads in the system, but I do not know
how to obtain a stack dump from a thread being passed as a parameter.
The only method that seems related to this task is Thread.dumpStack(),
but it is intended to be called from within the thread, so it will not
work for me.
Thanks again,
Rodrigo Ruiz
Shapira, Yoav wrote:
Howdy,
It's not hard. I've posted code in the past that will list and give you
access to all the threads in the system. Then you can crawl this list
and use the exception-oriented approach. But keep in mind this is all
transient snapshots.
Yoav Shapira
Millennium ChemInformatics
-Original Message-
From: Rodrigo Ruiz [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 03, 2004 5:04 AM
To: Tomcat Users List
Subject: How to get a thread stack dump programmatically
Hi all, is there any way to get a stack trace of a given thread?
I want to obtain a full thread stack dump from a JSP, just like the one
obtained via kill -QUIT, but I do not find any method in the Thread
class that could be used to get this information.
I seem to recall that some code was posted some time ago in this list,
but I have not found it in the archives. Any ideas?
PS: What I really want to do is a tool for detecting deadlocks via
thread dump analysis :-)
-
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Re: rtexprvalue ignored? - fixed
Hi, just a tip for portability: WebSphere JSP parser will complain when you use an expression containing the same string delimiter used for the attribute. This means that attr=%= aaa % will produce a compiler error. To avoid this, simply use a different quotation marks for the attribute itself, as in: attr='%= aaa %' I personally consider this a bug in WebSphere, but in the meanwhile the change does not hurt :-) Hope it helps, Rodrigo Ruiz Josh G wrote: At 11:47 AM 19/12/2003, you wrote: This is what i was telling you before, the attribute has to be either a expression or a constant, not both. so add the _off.gif part to the tmp variable before you put it in the tags attribute. like this: % String temp = sectionNames[i] + _off.gif; % image:local file=%= temp % / thats what i've done before to fix the problem. dave Ah, gotcha... Now I see. I misread it, and thought you meant that my problem was within the %= %, not in the tag attribute. Cheers mate. If it helps you any, I also got image:local file=%= tmp + off.gif % / to work, since I'm doing a lot of these lines and assigning tmp to sectionNames[i] above the block. (sent this back to the list so it turns up in the archive, sorry if this pisses anyone off). Again, thanks, have a beer on me. -Josh He likes to run, And then the thing with the.. person.. ... Oh boy, that monkey is going to pay. [ Josh 'G' McDonald ] -- [ Pirion Systems, Brisbane] [ 07 3257 0490 ] -- [ 0415 784 825 ] -- [ http://www.gfunk007.com/ ] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Maximum page size before JasperException
Hi Peter, I am not sure of which are the current limitations of the JVM in method code and constants pool sizes, but with such a huge JSP you could be reaching them. Remember that your JSP will be converted into a servlet, and that most of the JSP code will be generated inside a single method (called somewhat similar to _jspService, so the larger your JSP is, the larger the generated servlet will be. You can probably find the exact numbers in the Java Virtual Machine Specification. A way of alleviating this is through configuration of the Jasper servlet, that is, the servlet that compiles JSPs. You will find its configuration in the tomcat/conf/web.xml file. One of the attributes you can configure there will tell the compiler to put all the static content of your JSP in a static plain text file, so it will not be part of the servlet class, reducing its size. Hope it helps you, Rodrigo Ruiz Peter Guyatt wrote: Hi There, The JSP page had it as a JavaScript variable (long story!!). I am more curious to find out what the maximum size is due to an academic curiosity Thanks Pete -Original Message- From: Kwok Peng Tuck [mailto:[EMAIL PROTECTED] Sent: 17 December 2003 11:21 To: Tomcat Users List Subject: Re: Maximum page size before JasperException Hmm maybe you can just write out the file to the response body in a servlet ? Or do you need to do something in the jsp ? Peter Guyatt wrote: Hi there, Its an XML file Pete -Original Message- From: Kwok Peng Tuck [mailto:[EMAIL PROTECTED] Sent: 17 December 2003 11:12 To: Tomcat Users List Subject: Re: Maximum page size before JasperException What are you displaying in a JSP page that takes up 4 megs ? Peter Guyatt wrote: Hi There, Can anyone possibly tell me what the maximum page size allowed when compiling/presenting JSP page. The question arises when I try and display a 4meg file. If there is a limit is there any way to increase the maximum allowed size? Thanks Pete - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: new JVM feature, just an idea
Just an idea, a jar archive can contain a list of jar dependencies in its META-INF/manifest.mf file. You could create such a jar in a fixed location in your system, and set your CLASSPATH point to it. An example of such a manifest could be: Manifest-Version: 1.0 Created-By: myself Class-Path: d:\usr\local\jakarta\apache-ant-1.5.4\lib\xmltask.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\xml-apis.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\xercesImpl.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\optional.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\ant.jar d:\arquiv~1\j2sdk1.4.1_01\commapi\comm.jar d:\usr\local\skinlf-1.2.4\lib\skinregion.jar; ... This way, including this jar in your classpath will be equivalent to include all its dependencies :-) Another think that could help would be to create a d:\jars directory, and place a copy of all your jars into it. This way, the CLASSPATH variable will be shorter (and BTW, your ant scripts too ;-) Hope this helps, Rodrigo Ruiz Edson Alves Pereira wrote: That´s right, but even using a GUI IDE like JBuilder or Netbeans this problem can occours, because in a low level these tools make a command like to compile, to build a webbapp or to create a jar file. -- De: Shapira, Yoav[SMTP:[EMAIL PROTECTED] Responder: Tomcat Users List Enviada:sexta-feira, 12 de dezembro de 2003 15:18 Para: Tomcat Users List Assunto:RE: new JVM feature, just an idea Howdy, And Yoav, you did say that in almost 10 years no one complains about it, but as i know there are many people facing this issue all over internet also. My neibour here has a windows 2000, he will make some tests with its command line. I misunderstood your problem when I said no one else has it. What you describe is a common issue. It used to be more common before people used Ant and IDEs, when they did more stuff on the command line. I just haven't compiled anything in a DOS window for ages, so I forgot ;) Yoav Shapira -- De: Shapira, Yoav[SMTP:[EMAIL PROTECTED] Responder: Tomcat Users List Enviada:sexta-feira, 12 de dezembro de 2003 14:41 Para: Tomcat Users List Assunto:RE: new JVM feature, just an idea Howdy, I see -- thanks for the example. You do realize Ant adds a lot of these jars for you automatically to the classpath, right? You don't need to add anything in ANT_HOME/lib, as that's automatically included. Furthermore, if you're using JDK 1.4 or later, you can remove a bunch of other jars from the path as they're included in the JDK, e.g. JAXP, Crimson, JDBC 2.0 extensions. Finally, you have a number of duplicates, e.g. the XML APIs, repeated a number of times in the path. Yoav Shapira Millennium ChemInformatics -Original Message- From: Edson Alves Pereira [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 1:35 PM To: 'Tomcat Users List' Subject: RE: new JVM feature, just an idea This mainly it happen with ant, here a snapshot of it: D:\home\edsonset LOCALCLASSPATH=d:\usr\local\jakarta\apache-ant-1.5.4\lib\xmlta sk.jar;d:\usr\local\jakarta\apache-ant-1.5.4\lib\xml- apis.jar;d:\usr\local\j akar ta\apache-ant-1.5.4\lib\xercesImpl.jar;d:\usr\local\jakarta\apache-ant- 1.5.4 \lib \optional.jar;d:\usr\local\jakarta\apache-ant- 1.5.4\lib\ant.jar;d:\arquiv~1\ j2sd k1.4.1_01\commapi\comm.jar;d:\usr\local\skinlf- 1.2.4\lib\skinregion.jar;d:\u sr\l ocal\skinlf-1.2.4\lib\skinlf.jar;d:\usr\local\ecs-1.4.1\lib\xerces- 1.2.2.jar ;d:\ usr\local\ecs-1.4.1\lib\jakarta-regexp-1.2.jar;d:\usr\local\ecs- 1.4.1\ecs - 1. 4.1. jar;d:\usr\local\java_cup\java_cup.jar;d:\usr\local\hsqldb_v.1.61\lib\hs q ld b .jar ;d:\usr\local\junit3.7\junit.jar;d:\usr\local\jakarta\apache-ant- 1.5.4\lib\x mlta sk.jar;d:\usr\local\jakarta\apache-ant-1.5.4\lib\xml- apis.jar;d:\usr\local\j akar ta\apache-ant-1.5.4\lib\xercesImpl.jar;d:\usr\local\jakarta\apache-ant- 1.5.4 \lib \optional.jar;d:\usr\local\jakarta\apache-ant- 1.5.4\lib\ant.jar;d:\desenv\os ctrl _lib\classes;d:\desenv\osctrl\classes;d:\desenv\pannet\src\servlets\ifin a nc e \cla sses;d:\desenv\pannet\src\servlets\intranet\classes;d:\desenv\pannet\src \ se r vlet s\panfinance\classes;d:\desenv\pannet\src\servlets\base\classes;d:\desen v \p a nnet \java-lib\jasper-runtime.jar;d:\desenv\pannet\java-lib\jasper- compiler.jar;d :\de senv\pannet\java-lib\jdbc2_0-stdext.jar;d:\desenv\pannet\java- lib\tinySQL.ja r;d: \desenv\pannet\java-lib\servlet.jar;d:\desenv\pannet\java- lib\ojdbc14.jar;d: \des env\pannet\java-lib\shell_term.jar;d:\desenv\pannet\java- lib\crimson.jar;d:\ dese nv\pannet\java-lib\jconcept.zip;d:\desenv\pannet\java- lib\com.zip;d:\desenv\ pann et\java-lib\acme.zip;d:\desenv\pannet\java- lib\xBaseJ.jar;d
Re: new JVM feature, just an idea
It is a feature of the JAR specification. You can find the online document at http://java.sun.com/j2se/1.4.2/docs/guide/jar/jar.html It is in the Main Attributes section. The feature is also present in JDK 1.4.1 (and I think in 1.3.1 too, but I have not tested this) :-) Regards, Rodrigo Ruiz Derek Mahar wrote: Is the Class-Path keyword actually available in META-INF/minfest.mf or is this a feature that you like the JVM to support? Derek -Original Message- From: Rodrigo Ruiz [mailto:[EMAIL PROTECTED] Sent: December 15, 2003 3:50 AM To: Tomcat Users List Subject: Re: new JVM feature, just an idea Just an idea, a jar archive can contain a list of jar dependencies in its META-INF/manifest.mf file. You could create such a jar in a fixed location in your system, and set your CLASSPATH point to it. An example of such a manifest could be: Manifest-Version: 1.0 Created-By: myself Class-Path: d:\usr\local\jakarta\apache-ant-1.5.4\lib\xmltask.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\xml-apis.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\xercesImpl.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\optional.jar d:\usr\local\jakarta\apache-ant-1.5.4\lib\ant.jar d:\arquiv~1\j2sdk1.4.1_01\commapi\comm.jar d:\usr\local\skinlf-1.2.4\lib\skinregion.jar; ... This way, including this jar in your classpath will be equivalent to include all its dependencies :-) Another think that could help would be to create a d:\jars directory, and place a copy of all your jars into it. This way, the CLASSPATH variable will be shorter (and BTW, your ant scripts too ;-) Hope this helps, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Image Viewing
Kiran, if condifentiality is your main concern, I will suppose you are using some kind of authentication mechanism in your webapp. If you are using container authentication, just add the image directory to your security restriction, and only authenticated users will have access to the images. If your authentication scheme is different, but you can access the credentials data from the request, you could implement a filter that denies access to non-authenticated requests, and map the filter to the images directory. You will find more information on both subjects in the Servlet Specification :-) Hope this helps you, Rodrigo Ruiz Kiran Patel wrote: I am using jsp and tomcat 4.1 for my web application. My application is viewing image which is in the webapps/image folder. This image can also be viewed from the internet by just typing the url. I want to block this since these are the confidential images. Does anybody know how to do that. Thanks in advance. Kiran Patel - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSP doubt
Mmmm, I have never tried this, but you could try something like: !-- your web.xml file -- ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; !ENTITY precompiled SYSTEM web-fragment.xml web-app ... precompiled; ... /webapp With this syntax, the parser should replace precompiled; by the contents of the web-fragment.xml file. I do not know if the parser will accept it, but in case it does, you should put precompiled; between the last servlet and the first servlet-mapping declarations in your web.xml file. HTH, Rodrigo Ruiz Edson Alves Pereira wrote: Is there a tag to import these new xml file in my web.xml? -- De: Rodrigo Ruiz[SMTP:[EMAIL PROTECTED] Responder: Tomcat Users List Enviada:terça-feira, 9 de dezembro de 2003 14:14 Para: Tomcat Users List Assunto:Re: JSP doubt Edson Alves Pereira wrote: Hello folks, i made a war file and i compiled my JSP pages and create a jar file with then. My question is, do i still need to put inside my webapp ( in my case war file, but is the same ) all JSP files anyway? Because tomcat complain about them. Regards, Edson Hi Edson, when you compile your JSPs, you are creating a set of servlet classes. Tomcat needs a mapping between the servlet classes and the paths they will serve, so you need to explicitly tell Tomcat to use your index_jsp servlet class when it receives a request for index.jsp. If you do not include this mapping, Tomcat will search for the jsp file, and complain when it does not found it. If you do JSP precompilation through the JspC ant task, I think there is an option to tell it to create a web.xml fragment containing the extra tags you need to include in your web.xml file. Regards, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
jasper2 ant task does not report JSP error descriptions
Hi all, I am trying to use the jasper2 task that comes with Tomcat. In 4.1.12 version, when I had an error, it reported something similar to: An error occurred at line: 15 in the jsp file: /NewUser.jsp Generated servlet error: [javac] Compiling 1 source file C:\project\genjsp\index_jsp.java:53: illegal start of expression } ^ But with 4.1.27, it changed and now it just reports: [jasper2] Compile failed; see the compiler error output for details. [jasper2] at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:844) [jasper2] at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:682) ... But no compiler error output is generated anywhere :_( Can this be fixed? Maybe the taskdef example that comes in the javadoc comments of the class (org.apache.jasper.JspC) is not totally correct? Last time I checked the ant jspc task, it didn't compile the generated servlets, so it was unable to tell which JSP line contained the error. Thanks in advance, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSP doubt
Sorry, I was somewhat asleep when I wrote the previous message ;-) The correct syntax to include an entity in your web.xml is: !-- your web.xml file -- ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; [ !ENTITY precompiled SYSTEM web-fragment.xml ] web-app ... precompiled; ... /webapp Regards, Rodrigo Ruiz Edson Alves Pereira wrote: Is there a tag to import these new xml file in my web.xml? -- De: Rodrigo Ruiz[SMTP:[EMAIL PROTECTED] Responder: Tomcat Users List Enviada:terça-feira, 9 de dezembro de 2003 14:14 Para: Tomcat Users List Assunto:Re: JSP doubt Edson Alves Pereira wrote: Hello folks, i made a war file and i compiled my JSP pages and create a jar file with then. My question is, do i still need to put inside my webapp ( in my case war file, but is the same ) all JSP files anyway? Because tomcat complain about them. Regards, Edson Hi Edson, when you compile your JSPs, you are creating a set of servlet classes. Tomcat needs a mapping between the servlet classes and the paths they will serve, so you need to explicitly tell Tomcat to use your index_jsp servlet class when it receives a request for index.jsp. If you do not include this mapping, Tomcat will search for the jsp file, and complain when it does not found it. If you do JSP precompilation through the JspC ant task, I think there is an option to tell it to create a web.xml fragment containing the extra tags you need to include in your web.xml file. Regards, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to prevent direct access to login.jsp
I think there is another option that noone has mentioned yet :-P When the login.jsp page is presented as part of the login process, there will be some standard request attributes containing the original requested page (I don't remember the names now, but you can find them in the servlet spec). They are used by the servlet container to redirect to the correct page once your login data is validated, and will be not present if you point to the page directly from the browser. You can check for the existence of these attributes, and if they are not present redirect to your webapp homepage. This way, the correct login steps will be followed. HTH, Rodrigo Ruiz Adam Hardy wrote: On 12/08/2003 11:59 PM Chaikin, Yaakov Y (US SSA) wrote: I realized that my user can mess himself by bookmarking the login page he is asked to log in. The login.jsp appears in the URL address in the browser... Does anyone know how to avoid this? How do I block that URL for the user and not for the server? Hi Yaakov, I think the best way to deal with this situation is to configure tomcat to catch the error status 403 or whatever it is and then serve up an error page with a calm, logical explanation of why they shouldn't do that. Or upgrade to tomcat 5. Adam - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSP doubt
Edson Alves Pereira wrote: Hello folks, i made a war file and i compiled my JSP pages and create a jar file with then. My question is, do i still need to put inside my webapp ( in my case war file, but is the same ) all JSP files anyway? Because tomcat complain about them. Regards, Edson Hi Edson, when you compile your JSPs, you are creating a set of servlet classes. Tomcat needs a mapping between the servlet classes and the paths they will serve, so you need to explicitly tell Tomcat to use your index_jsp servlet class when it receives a request for index.jsp. If you do not include this mapping, Tomcat will search for the jsp file, and complain when it does not found it. If you do JSP precompilation through the JspC ant task, I think there is an option to tell it to create a web.xml fragment containing the extra tags you need to include in your web.xml file. Regards, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat's ThreadPool and InheritableThreadLocal variables
AFAIK, Java does not provide any way to clear ThreadLocal variable values related to a given thread. As it is a language-level limitation, Tomcat can do nothing to resolve it. I tend to think that this is also a valid reason to consider not necessary to document it ;-) Cheers, Rodrigo Ruiz In some ways,you are right.But,looking at it this way. When it's said that each request is processed in a *new* thread,it is reasonable to expect that thread-specific language constructs will be handled.In this case,a new thread would mean new copies of ThreadLocal and InheritableThreadLocal variables. If this new thread is created in a customized manner(in this case,alloted from a ThreadPool),I would say that the behaviour of the new Thread should be modelled on the language defined lines. It would be good if this is atleast documented somewhere. :) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat 4.x non .jsp suffix for includes?
In fact, I think you could reuse the default jsp servlet, and simply add servlet-mapping servlet-namejsp/servlet-name url-pattern*.jnc/url-pattern /servlet-mapping to your webapp WEB-INF/web.xml, or $CATALINA_HOME/conf/web.xm, whichever you preferl What I am not sure about is whether the JSP servlet has its name fixed in the JSP specification, or it is left to the container implementation. Perhaps someone here can enlight this :-) Cheers, Rodrigo Ruiz Richard Bondi wrote: Thanks to Chris and and Tim Funk for pointing me in the right direction. For the archives, I found that adding the following two lines to %catalina_home%/conf/web.xml did the trick: servlet servlet-namejnc/servlet-name servlet-classorg.apache.jasper.servlet.JspServlet/servlet-class init-param param-namelogVerbosityLevel/param-name param-valueWARNING/param-value /init-param load-on-startup3/load-on-startup /servlet servlet-mapping servlet-namejnc/servlet-name url-pattern*.jnc/url-pattern /servlet-mapping Best, Richard Bondi At 06:14 PM 12/3/2003 -0500, you wrote: Richard, Does anyone know how to configure tomcat to compile .jnc files in this circumstance? Is there a standard convention for naming jsp include files? Yeah, .jsp :) Seriously, though. Check out CATALINA_HOME/conf/web.xml for how they configure the .jsp file trnaslator/compiler. You could modify the that web.xml file to include the same type of things for .jsp files, or you could modify the deployment descriptor for your application. Unfortunately, modifying your deployment descriptor will make your application non-portable. But, you are already making your .jsp files called something else, anyway, so you'll have to do some sort of re-configuration for every app server you indend to use. -chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Restarting tomcat from web page
The only way to restart a Windows service is through native code. You could use JNDI, or Runtime.exec() to run a net stop net start script, or a perl script, or a vbs one... there are many options here :-) Apart from protecting the page, I would also implement a first step with a countdown, so you can abort the restart operation if you want :-P Regards, Rodrigo Ruiz Tim Funk wrote: I have heard of this done by using a second webserver with perl installed and then using Perl Win32 calls from webserver A to webserver B to restart the server. You could always run the other webserver on a high protected port so you don't need a second box. -Tim Altug B. Altintas wrote: Hi How can i restart Tomcat which is running as service, from a web page 1 - calling bat file ? (not working) 2 - calling http://localhost:8080/manager/html/start?path=/engine (asking password) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OutOfMemoryError
Christopher Schultz wrote: So, moving on, what usually happens is that a low memory condition triggers a GC (usually a full GC). When the GC runs, it needs some memory to work with. If it cannot allocate memory for itself, it will die with an OOM. If the heap hasn't increased, yet, then the GC cannot allocate more objects on the heap to do it's thing. That can explain why you get an OOM when you are way under the heap size in the output of ps. Hi Christopher, I have a doubt with respect to your explanation. Is there any difference between an OOM thrown within the GC thread, and any other OOM? I mean, if an OOM is thrown within the GC, and it dies, the JVM looses its GC, so no memory can be deallocated, and the only way is to shutdown the JVM. But what happens if the OOM is thrown in any other thread? Is the JVM state preserved in this case? As said in another post, generally speaking, an OOM leaves the JVM in a bad state. But, can this state be detected by checking the state of any of the JVM threads? I guess the GC should run in a thread I could get a reference from. If I check this reference liveness, could I determine if the OOM has affected the GC? I have developed some web services that can return an important amount of data. Under high load, the server memory requirements can become huge, so I added a loop into the catalina script to restart my tomcat instance automatically, and added a filter that catches OOMs and forces a JVM shutdown, after writing some logs asking for more memory. I was wondering if I could reduce the shutdown condition to only the cases when the GC has died. Greetings, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: org.apache.catalina.valves.RemoteHostValve
Instead of denying access, try to allow it. I think the valve should accept this syntax: Valve className=... allow=localhost,127.0.0.1,other IPs/ If you only deny access from other intranet computers, you are allowing access from internet HTH, Rodrigo Ruiz Drinkwater, GJ (Glen) wrote: Hi I have tried to put Valve className=org.apache.catalina.valves.RemoteHostValve deny=*.subnet.ac.uk/ in my context but it keeps on throwing an exception Catalina.start: java.lang.IllegalArgumentException: Syntax error in request filter pattern *.subnet.ac.uk Can wild cards be used in this context? Does anybosy know how to only allow the localhost to access the server /context??? Glen - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
OT: Using authenticated URLs
Hi all,
I am trying to implement a downloading web service that will act as an
internet front-end for an intranet server. I want my service to return a
file as an attachment. For this, I have a method like this (simplified
code):
public DataHandler download(String path) throws AxisFault {
String authInfo = getUserName() + : + getPassword();
String sUrl = http://; + authInfo + @ + getServerHost() + :
+ getServerPort() + /files/ + path;
try {
URL url = new URL(sUrl);
return new DataHandler(url);
}
catch (MalformedURLException e) {
throw new AxisFault(Invalid path, e);
}
}
In order for Axis to send the URL contents as an attachment, I need to
return a javax.activation.DataHandler instance. This object does not
have any method to set authentication info.
The intranet server requires Basic authentication credentials, that is
why I add user / password to the URL. The problem is that it does not
work. The code fails with:
java.io.IOException: Server returned HTTP response code: 401 for URL: ...
I have made some tests, and finally, I have found that when I try to use
url.openStream() for a URL with user / password data, no Authentication
header is sent to the server. Surfing the JDK source code, I can see
there are BasicAuthentication and DigestAuthentication classes in the
sun.net.www.protocol.http package. I guess they should do what I need,
but I am trying to figure out how to activate their functionality.
Currently, I am creating a custom sun.net.www.protocol.http.Handler
subclass that extracts the getUserInfo() data from the URL and adds the
Basic Authentication header to the created URLConnection. It works, but
I do not like to have Sun classes dependencies in my code, and it will
fail if I try to connect to a server requiring Digest authentication.
Does anybody have some experience in this subject?
I wonder if there is something missing in my code. Perhaps a call
to activate the authentication mechanism, or something similar?
Thanks in advance,
Rodrigo Ruiz
-
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Re: hot deploy
Leonardo Kenji Shikida wrote: is there an easy way to deploy a web application over another existent one without stopping tomcat and without killing the current sessions? Hi Leonardo, You can redeploy a webapp through the admin or manager applications. I have not tested myself, but I think that if you configure a persistent session manager (you can find more info on this in the configuration reference), active sessions should be stored before the webapp shutdown, and reloaded upong restarting it. HTH, Rodrigo Ruiz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Synchronising database access
If you implement your database access as a static synchronized method,
only one instance of the class will be able to execute it at the same time.
If you put all your database stuff in the same class, this schema should
be enough. If only one servlet does database access, then you can put
these methods on the servlet, but if you have more than one servlet
doing this stuff, you should place your code in a separated class.
Apart from this, take into account that this will be a, generally
speaking, very weak solution. In a general scenario, other applications
(or webapps) could be accessing your database. In those cases, the only
safe solution are database transactions :-)
HTH,
Rodrigo Ruiz
Antony Paul wrote:
thanks for the reply
synchrosing servlet code dont work ?
Antony Paul
- Original Message -
From: Peter Guyatt [EMAIL PROTECTED]
To: Tomcat Users List [EMAIL PROTECTED]
Sent: Friday, November 21, 2003 5:28 PM
Subject: RE: [OT] Synchronising database access
Hi There,
Use a singleton class to manage the database transactions.
Then implement a owner mechanism. E.g.
class DbTxMgr {
String owner = null;
public synchronized boolean lockMgr (String threadId) {
if (owner == null) {
owner = threadId;
return true;
} else {
if (owner.equals(threadId)) {
return true
}
return false;
}
}
public synchronized void releaseMgr (String threadId) {
if (owner != null) {
if (owner.equals(threadId)) {
owner = null;
}
}
}
public synchronized boolean insert (String statement, String threadId) {
if (owner == null) {
owner = threadId;
}
if (owner.equals(threadId)) {
file://do the transaction
}
}
}
your code
class tester {
file://name of your thread
Thread t = new Thread(testerThread)
...
if (lockMgr(t.getName())) {
file://do database code
}
lockMgr.releaseLock(t.getName());
}
This way olny the owner of the lock can perform transactions and all other
threads must wait for the lock to be released
Thanks
Pete
-Original Message-
From: Antony Paul [mailto:[EMAIL PROTECTED]
Sent: 21 November 2003 11:51
To: Tomcat Users List
Subject: [OT] Synchronising database access
Hi,
I want to synchronise all database access. There are lots of
situations
where first first a select query is performed to get the results and then
insert/update data. I dont want to implement row level locking or
optimistic
locking. I just want to synchronise the whole process. Only after a thread
completes the entire process other threads can execute the code. How to do
it. Do I have to synchronise on Connection or on this or implement
SingleThreadModel. I also want to know how much extra time a synchronised
block requires than an unsynchronised block.
Antony Paul.
-
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Re: Is this a bug???
Do you have any other tomcat installed on the machine? I sometimes forget to set the correct value to my CATALINA_HOME / CATALINA_BASE environment variables ;-P Regards, Rodrigo Ruiz Gabriel Jenik wrote: Chris... Thanks for answering... Maybe that's the problem... I don't know...I am just stattring on this... The strange thing is that I've just installed it... I haven't made any modifications to anything... just installed the tomcat... Could it be something with the configuration on my PC??? Do you think I should report it as a Bug?? Thanks Gabriel - Original Message - From: Christopher Schultz [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, November 19, 2003 7:53 PM Subject: Re: Is this a bug??? Gabriel, Hi... I've read all the stuff about repoting bugs, but I still don't want to report this, cause I don't know if this is a bug or not...It is too hard to know... isn't it? Here is the deal... I have clean installation. Every first time, after startup, I try to get to the tomcat administration, I get this error... Then I just reload the page and everithing works great I've tried to stop the tomcat administration application and then re-start it... and I still get the error on the first attempt to surf to the application.. what's this??? org.apache.jasper.JasperException: Malformed \u encoding. at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2 54) It looks like you have a JSP that you've run through native2ascii (or used your own escape codes), and one of them is bogus. Look in your JSPs for the string \u and see if any of those references are broken. -chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.542 / Virus Database: 336 - Release Date: 18/11/03 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can Tomcat run on JRE only?
Thierry Thelliez wrote: My understanding is that the full JDK is needed for compiling JSPs. What if the JSPs are already compiled? Can on deploy a JSP site without the full JDK, only the JRE? Can I deploy the site without the JSP files themselves? With a copy of the work directory? AFAIK, the full JDK is needed only for compiling the servlets generated from your JSPs. If you only have servlets or precompiled JSPs, the JRE should be enough. I think you can even compile JSPs with only the JRE if you provide a javac replacement, as jikes If you recompile JSPs, remember to add the extra servlet declarations in your web.xml deployment descriptor. If you do not do so, they will not work. HTH, Rodrigo Ruiz Thanks, Thierry - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat OpenJMS Design Pattern?
You could check this article http://www.onjava.com/pub/a/onjava/2001/12/12/openjms.html HTH, Rodrigo Ruiz Gavin, Rick wrote: Hi All, Just wondering if any could post a working design pattern for using openJMS or another open JMS engine with tomcat, preferably a model using asynchronous queue message handling. I figured someone around here has done it and I would rather use a tried and true model. Looking for some basics about best intregration method, and or for dealing with async message Handling. I currently have openJMS setup using persistent Database storage, using JNDI content lookup to Get the JMS connection factory, is this better looked up once and bound to servlet context as an Application scope variable, etc, etc? Thanks for you any help, Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Settings advice on long-running process.
Elankath, Tarun (Cognizant) wrote: Hi list, We have a long running process (all in java, not external) that is initiated from struts action class, (does a lot of file I/O, etc) The browser apparently timesout after about 20 minutes or whereabouts, and then suddenly the process do stops bang in the middle as soon as this happens. This is quite puzzling as one expects the process to continue even if the browser timed out. If you do not write anything to the servlet output, perhaps Tomcat is assuming some kind of connection timeout or it is somehow detecting that the remote browser has broken the connection. I guess you cannot change this behaviour. I do know the correct solution is to make it run in the background and give constant updates to the user, however, we just need to make it work ASAP with the correct approach. We'll migrate to the background process progress page approach soon enough. That's correct. IMHO you should move to this approach ASAP. Otherwise, you could encounter migration problems and bugs, due to some differences in how to make thing work. Remember your thread will have to notify state changes to a listener, or publish state data for your structs action to be able to get it. You should take this into account right now, even before migration :-) Any pointers/comments on browser (Internet Explorer), server (Tomcat) settings and Struts settings to handle long-running activities in the web-request cycle would be greatly appreciated. I did scout the web, but apart from the connectionTimeout setting in the connector element of tomcat, I didn't find anything much. I don't think increasing session-timeout would be of any help here. If you have access to the servlet output from your process, you could write something to it from time to time. If, for example, you write html right at the beggining of your servlet process, you can write dummy comments like !-- --. If you put these statements in the right point, you could keep the connection alive until the process finishes. If you do this, remember to do an out.flush() after the writing. I once did something similar. I wrote an html page with two divs simulating a progress bar. My process started just before writing the /html tag. During the process I was sending a javascript code that was updating the inner div width according to the current state of the process. This worked for me, but it made my process code far more complex than necessary... and than maintainable :-P Finally, I dropped that code and replaced it by a background thread approach. Hope this helps you, Rodrigo Ruiz Any pointers on how to avoid the 'freeze' would also be much appreciated. Thank you, Tarun This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorised review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful. Visit us at http://www.cognizant.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: encoding problems with XML
Special characters can be written using a escape syntax. This syntax is something like XXX;. where XXX is a numerical code in decimal format (or in hexadecimal if you precede it by a numeral (#) sign. Depending on the character encoding being used in your XML file, the code will vary for non ASCII characters. You can find conversion tables in the web via google. Just search for character table and your encoding charset name. For the ampersand, the sequence would be #38; HTH, Rodrigo Ruiz Edson Alves Pereira wrote: Hello folks, i´m trying to write some special characters in a XML file, like: company Doubs Noble/company But i don´t known the right encoding to [ ] be validate properly, any idea? Regards, Edson - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: static variables and context
If your class is present only in the WEB-INF/lib directory of your webapps, there will be separated singletons for each one. If you put the jar in $CATALINA_HOME/common/lib or $CATALINA_HOME/shared/lib, the class loader will take the class from there, so there will be only one shared instance for all your webapps. Magne Skjeret wrote: Hi I just need someone to confirm my belives. I have a jar file added to my WEB-INF/lib I create a singleton of one of my classes. In another context I have the same jar file, so it is duplicated. And I create a singleton of the same class there. I thought that each context had its own classloader so that a singleton was private for each context. But now I have doubts. Can anyone shed some light on this. Magne - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Access static content ...
The problem is the /resources entry. If you map it to the default servlet, the directory name itself will not be part of the path, but a root for the actual one, so the default servlet will understand you want to get the path following resources, and it is . I guess the same will happen with the contents of the directory. It seems that the default servlet cannot be configured to serve files from an alternative directory. You could try one of the following: - Create your own servlet for resources requests. Perhaps you could subclass DefaultServlet, or use it in any other way. - Implement a Filter that redirects any request not to resources to your own servlet, and let the default configuration to work for the resources directory. Samuel Le Berrigaud wrote: Thanks for your help, I'll do it another way I think and I'll probably come back on that problem later on. SaM Tim Funk wrote: Then there is either - a bug in tomcat - a config error (most likely) but don't know what could be the culprit I never heard of this before. Seems quite odd. -Tim Samuel Le Berrigaud wrote: Yes Tim Funk wrote: [Need more coffee] Does that mean that http://myserver/context/resources is serving a dir listing of the contents from http://myserver/context ? (instead of /context/resources) -Tim - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: specifying web app classpath in server xml?
In server.xml you can specify an alternative class loader for your context webapp (see configuration reference on the tomcat docs). You will have to dig into the Tomcat code, but you may create a subclass of the default class (or use it as a template), and add some mechanisms to include extra directories at the same level as WEB-INF/lib. You could, for example, make it use a system property, or add xml properties for configuring it from server.xml A bit advanced, and very non-standard, but it may work for your development environment :-) Curtis Leach wrote: I haven't tried this to see if it works, but you can always edit the catalina.sh or setclasspath.sh files. It's where CLASSPATH is reset during the Tomcat startup. (Or .bat for windows) Curtis -Original Message- From: Anton Modaresi [mailto:[EMAIL PROTECTED] Sent: Friday, November 07, 2003 9:31 AM To: 'Tomcat Users List' Subject: RE: specifying web app classpath in server xml? My point was exactly I would rather like an extra classspath in the webapp context declaration so I could skip the work of building a jar for one project and copy it (or somehow link it) to the other project's web-inf/lib. When I change in both projects I'd rather tell tomcat to just look a little extra. So you say the classpath fixed? Am I the only one who want to use tomcat in this way? how do I suggest this to developers, write to the other mailing list? regards, artin -Original Message- From: Shapira, Yoav [mailto:[EMAIL PROTECTED] Sent: den 6 november 2003 15:11 To: Tomcat Users List Subject: RE: specifying web app classpath in server xml? Howdy, Can you symlink your WEB-INF/lib/otherProject.jar to the other's project's build directory? You can't declare classpaths in server.xml. The classpath hierarchy is fixed. Yoav Shapira Millennium ChemInformatics -Original Message- From: Anton Modaresi [mailto:[EMAIL PROTECTED] Sent: Thursday, November 06, 2003 5:29 AM To: [EMAIL PROTECTED] Subject: specifying web app classpath in server xml? Hi, I would like to specify additional classpaths for a web app beside the WEB-INF/lib WEB-INF/classes and common/lib directories. My reason is I have a project using code from another project. In a production environment you would jar the classes from the used project and put it in the WEb-INF/lib of the other but in development, where both projects may be updated all the time, I'd prefer to skip the extra overhead of either jaring all files, or recompile the classes a second time to the WEB-INF/classes of the taget project.. So I am wondering, is there a way, I can say in my server.xml, hey please go and check in this additional classpath too for this particular web app. is this possible? (Im using tomcat 5.0.7) This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: response.sendRedirect()
You should only loose your session if session cookies support is disabled, and - the redirected URL has not been rewritten to add the session id, or - you redirect to another context / server in the second case the passed session id will be invalid, or ignored, depending on the case. Sometimes I have lost my session because I was not calling the getSession() in my servlet. This led my servlet engine to not properly set the response cookies. Hope it helps you, Rodrigo Ruiz Duncan wrote: Is it normal to loose your session when using the response.sendRedirect() command? If so is there a way to redirect without loosing the session? Cheers, Duncan. Decker Telecom Ltd - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat crash
Start your tomcat instance with catalina run instead of startup. This will make your tomcat run in the same console you invoke it from, and will let you its output when it stops :-) [EMAIL PROTECTED] wrote: That's a good Idea but the console window close when tomcat crash so nothing can be read. Can I redirect the console output to a file ? Scrive Ben Souther [EMAIL PROTECTED]: There is no stack trace in the console window when the server crashes? Try putting a 'System.out.println(page/servlet name);' at the top of all of your pages. Then you can see which page was the last one hit before the server crashed. On Friday 07 November 2003 11:06 am, [EMAIL PROTECTED] wrote: Thanks for your ideas. I can see the console window but because the crash happens casually I can't see everytime the server screen and also reproduce the circumstances because I can't understand which are. The server crash only with my own app. and I don't have System.exit For the same reason I can't understand which code create the problem. Thanks again Scrive Ben Souther [EMAIL PROTECTED]: There is no console window, even when you start Tomcat with the catalina.bat file? Can you reproduce the circumstances that caused it to crash? Does it crash when you are hitting the exaple apps or only when you are hitting your own app? If it's your own app, or a third party app, can you post the code to the JSP/Servlet that was being hit when the server crashes? Do you have any calls to System.exit(0) in your code? On Friday 07 November 2003 10:48 am, [EMAIL PROTECTED] wrote: Unfortunately when tomcat crash I can't see the console window so I don't have any message useful to start the debugging... Scrive Anton Modaresi [EMAIL PROTECTED]: do you get an exception in the console window? If the tomcat window vanishes, you can try starting with the catalina batch file instead of the startup batch file. regards, anton -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: den 7 november 2003 16:34 To: [EMAIL PROTECTED] Subject: Tomcat crash Hello, I'm new to Tomcat and Apache so I'm wasting a lot of time trying to understand why Tomcat sometimes shutdown by itself or better it crash This happen without messages in the log file . can someone have some experience in that solved the problem ? Thanks to all. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Ben Souther F.W. Davison Company, Inc. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Ben Souther F.W. Davison Company, Inc. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Which is the winner----Singleton Class or Base Servlet????
I totally agree with Justin. One object instantiation does not take more than a few milliseconds. This is not a performance issue. Object instantiation becomes an issue only when a great number of objects are constantly being created. This is the case of, for example, JDBC connections or sockets in your server (that is why pooling is the best strategy for them), but not of a singleton. As for your performance tunning, it seems to me that you have taken good decissions: using oracle connection pooling, and using a native server for your video clips. Maybe you could switch from IIS to Apache. Independently of religious ideas, Apache has a very good performance, many experts recommend it over IIS due to important security bugs in IIS, and it can run on other platforms, so you could install the server on a Linux box. I do not want to begin an OS war discussion, just pointing that you could reduce costs, as Linux is free ;-) Regards, Rodrigo Ruiz Justin Ruthenbeck wrote: At 05:07 PM 11/5/2003, you wrote: In addition to what others have said, why don't you ask your highly knowledgeable friend for proof of what he's claiming? Anyway his answer to this question is,-- using base servlet does not create a separate object instance as it is done when using a singleton class.That way u use one object less from JVM point of view.However this answer did not solve my quest. Really? That's the reason? Ignore it. Choosing to implement something in a base class or in a singleton is a decision based on your app's architecture -- choose whichever is more clear and/or more maintainable for you. There may be performance issues involved, but that would have to be discussed with specific examples ... in any case, this is not one of them. justin - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Installing jakarta on linux RH9
Looking at the Red Hat 9 Release Notes, it seems that only JDKs prior to 1.4.1 fail. You are using 1.4.2, so you are not supposed to need the LD_ASSUME_KERNEL setting ;-) The problem comes from a new implementation of the POSIX Thread Native Library. This new version corrects some deviances from the POSIX standard, so applications that rely on these differences will fail. Regards, Rodrigo Christopher Schultz wrote: All, The newest version (4.1.29) should be fine. If I recall, however, there was a problem with Sun's Java Virtual Machine, and RH9, which used an incompatible threading library. No, on RH 9, all VMs will actually need the LD_ASSUME_KERNEL env variable (look in the archives for the details on the problems and the workaround). Is this accurate? I use RH9 with kernel 2.4.20/i686, JDK 1.4.2-b28 without any LD_ASSUME_KERNEL setting (that I know of). Is this for a specific kernel version or architecture? -chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Which is the winner----Singleton Class or Base Servlet????
Both techniques have their advantaes and disadvantages. A singleton class usually has problems when reloading the context. Using a Servlet Base for JSPs makes you container version dependent (As the minimum implementation required can change among jasper versions). Anyway, the performance improvements you can achieve selecting between these two options are probably minimal. Depending on your webapp DB load, you could obtain a greater performance boost using a connection pool. Look at the JNDI DataSource HOW-TO for more info about this :-) Hope this help, Rodrigo Ruiz kgsat wrote: Dear experts, It may not be appropriate to ask this doubt here.Though i am aware of it , i chose to ask here thinking that experts would forgive me. Now the doubt is... In a web application, what is the performance difference of using singleton class and a base servlet to do the database related operations such as loading the driver, obtaining the dbURL and obtaining the connection instance for further db operations. I use a singleton class for my db requirements in jsps and servlets and also in other beans. One of my friends suggests that using base servlet to do the same work is more efficient. Can any one throw some more light on this topic.i want to improve the performance of my web application. Any white papers or pointing URLs are given astounding welcome. thanks and regards sat - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat doesn't start
It seems you have any non UTF-8 character in your server.xml. Check your file and search for accented or any other non ASCII characters. You can also set the encoding of your xml file including the following statement at the beginning: ?xml version=1.0 encoding=ISO-8859-1? Changing ISO-8859-1 by the one you need. By default, if not included, the parser will suppose the encoding is UTF-8. HTH, Rodrigo Ruiz Didier Wiroth wrote: Hi, I've created a custom server.xml when I try to start tomcat, tomcat fails with this output: Catalina.start: java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence. java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence. at org.apache.xerces.impl.io.UTF8Reader.invalidByte(Unknown Source) at org.apache.xerces.impl.io.UTF8Reader.read(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.scanContent(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanContent(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc her.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1548) at org.apache.catalina.startup.Catalina.start(Catalina.java:449) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl .java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) What does that mean? Thanks - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Which is the winner----Singleton Class or Base Servlet????
JNDI adds a little performance penalty (extra overhead), and provides you more independency from the database layer. If that independency is not much important for you, your current configuration will probably suit better ;-) Apart from this, if your app serves video content, a careful tunning of your servlet output buffer size, and number of concurrent client connections will probably be the best point to optimize. Just curiosity, where do you store the video clips? file system, oracle or somewhere else? kgsat wrote: Hi Rodrigo Ruiz Thanks for your response.I have been using oracle conneciton pooling features in my singleton db class for the faster connectivity with the database from my application. Should i go for a JNDIDatasource model for the better db access or the current one will serve the needs.My application is a video download application meant for the members of the site. U have any thing to suggest with respect to database access ? regards sat - Original Message - From: Rodrigo Ruiz [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, November 05, 2003 6:23 PM Subject: Re: Which is the winnerSingleton Class or Base Servlet Both techniques have their advantaes and disadvantages. A singleton class usually has problems when reloading the context. Using a Servlet Base for JSPs makes you container version dependent (As the minimum implementation required can change among jasper versions). Anyway, the performance improvements you can achieve selecting between these two options are probably minimal. Depending on your webapp DB load, you could obtain a greater performance boost using a connection pool. Look at the JNDI DataSource HOW-TO for more info about this :-) Hope this help, Rodrigo Ruiz kgsat wrote: Dear experts, It may not be appropriate to ask this doubt here.Though i am aware of it , i chose to ask here thinking that experts would forgive me. Now the doubt is... In a web application, what is the performance difference of using singleton class and a base servlet to do the database related operations such as loading the driver, obtaining the dbURL and obtaining the connection instance for further db operations. I use a singleton class for my db requirements in jsps and servlets and also in other beans. One of my friends suggests that using base servlet to do the same work is more efficient. Can any one throw some more light on this topic.i want to improve the performance of my web application. Any white papers or pointing URLs are given astounding welcome. thanks and regards sat - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
JSP verification
Hi all,
As part of my compilation script I usually precompile all my webapp
JSPs, to catch all compilation errors. My ant script is something like:
target name=compileJsp
mkdir dir=${jsp.gendir}/
jspc destdir=${jsp.gendir} verbose=9 srcdir=web
webapp basedir=web/
classpath refid=project.classpath /
/jspc
javac srcdir=${jsp.gendir} destdir=${jsp.gendir} debug=on
classpath refid=project.classpath /
/javac
/target
This works fine, but compilation errors show line numbers in the
generated servlets, not in the JSPs (it's logic, as I am compiling the
generated servlets). I have seen that Tomcat is able to tell me which
JSP line is incorrect in error pages, so I guess there is a smarter way
to do this precompilation. Is there any way through ant tasks, or
through direct java invocation to get it?
Thanks in advance,
Rodrigo Ruiz
-
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Re: xhtml and Internet Explorer
Well, not necessarily unreadable, just different ;-) I usually play with the tag delimiters to allow some readability. For example, my JSPs usually begin with something like: [EMAIL PROTECTED] contentType=... import=... import=... errorPage=... %%! // class code %% // service code %!DOCTYPE ... ... And if I need to place two directives with no spaces in between, I write jsp:useBean id=data scope=request class=my.Data /jsp:getProperty name=data property=aField / It is not as clean as a directive per line, but at least it doesn't hurt too much :-P Regards, Rodrigo Marius Scurtescu wrote: Hi, Yes, I totally agree that this issue should be brought up with the JSP specification. I will look into that. Even if the suggestion is accepted it will be quite a while until a specification will deal with this issue and then even longer until there is going to be a Tomcat implementation supporting it. We are talking years I guess :-( For what I know the specification is not saying anything about this issue and if Tomcat is implementing it right now it will not go against the spec. Keeping strictly with the JSP directives (the issue can be extended to the JSP tags as well, but it gets more complicated) common sense is enough, I hope, to realize that whenever you add a directive you really don't want an empty line in your output. These empty lines are annoying at best (every time you check the source of a page generated by JSP you first see an empty page - quite stupid), and breaking your app at worst (like in the case of IE). The absolute best proof that there is a problem here that needs fixing is the fact that developers make their code unreadable just as a work around. Cheers, Marius Rodrigo Ruiz wrote: Marius, I think such a feature request should not be addressed to Tomcat, but to the JSP specification itself. Remember that Tomcat is being used as the reference implementation of servlet/JSP technologies, and so it should stick to the specification. Basically, as I see it, your request means a special treatment for a subset of directives in a few specific cases. I think it would imply that tags could be marked as not generating any output, so when in a single JSP line there were only such marked tags and leading / trailing spaces among them, the line itself could be omited from the output. Such a change should be made from the specification. Regards, Rodrigo Marius Scurtescu wrote: JSP is a templating language which is using a meta language: the JSP constructs. The new line is in the JSP indeed, but is it part of the meta language or part of the literal output? I would argue that these new lines are part of the meta language and that they should not be output. You put them there so the meta language you use is readable. See how FreeMarker, another templating language, is dealing with this issue: http://freemarker.sourceforge.net/docs/dgui_misc_whitespace.html#dgui_misc_whitespace_stripping You are not asking the directive to scan anything, the page compiler could consider white space and newlines after a directive as part of that directive. Marius Adam Hardy wrote: On 10/30/2003 10:08 PM Marius Scurtescu wrote: I will consider implementing a filter to remove the empty lines before the html tag. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Opinions
Jejeje, people (in general) should buy better monitors. It looks like they skip more than one line when reading on-line docs ;-) Shapira, Yoav wrote: Howdy, feature natively. Jakarta Commons' deamon is a unix-only solution (I imagine it uses JNI). So its's possible, but not portable. Still an advanced language... -Vincent. Aarrggh, Monday morning and I'm already annoyed. Where did you get the idea commons-daemon is unix only? It works on unix and win32 platforms. Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: xhtml and Internet Explorer
Marius, I think such a feature request should not be addressed to Tomcat, but to the JSP specification itself. Remember that Tomcat is being used as the reference implementation of servlet/JSP technologies, and so it should stick to the specification. Basically, as I see it, your request means a special treatment for a subset of directives in a few specific cases. I think it would imply that tags could be marked as not generating any output, so when in a single JSP line there were only such marked tags and leading / trailing spaces among them, the line itself could be omited from the output. Such a change should be made from the specification. Regards, Rodrigo Marius Scurtescu wrote: JSP is a templating language which is using a meta language: the JSP constructs. The new line is in the JSP indeed, but is it part of the meta language or part of the literal output? I would argue that these new lines are part of the meta language and that they should not be output. You put them there so the meta language you use is readable. See how FreeMarker, another templating language, is dealing with this issue: http://freemarker.sourceforge.net/docs/dgui_misc_whitespace.html#dgui_misc_whitespace_stripping You are not asking the directive to scan anything, the page compiler could consider white space and newlines after a directive as part of that directive. Marius Adam Hardy wrote: On 10/30/2003 10:08 PM Marius Scurtescu wrote: I will consider implementing a filter to remove the empty lines before the html tag. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Use of return statement in servlet.
Anthony, putting a return in a servlet code will not create any state problem for the servlet itself. You could have problems if you have opened resources that need finalization or closing before returning, for example DB connections, or opened streams others than the servlet input and ouput ones, but that depends on the code, and it is independent from the servlet engine. Of course, if you do not redirect to anywhere, or display nothing, what you will get in the browser is a neat clean blank page ;-) I am not sure at all, but I think JSPs could be different, depending on the compiler implementation. I think Jasper generated code does not have problems with return statements, but I check it with every new release I download, just in the case ;-) What I do is to create a simplest JSP: !-- JSP beginning -- Hello World !-- JSP end -- And compile it. Then, looking at the generated servlet code, I check that no resource-freeing operations are done after writing Hello Worl to the output stream. The moment this happens, the moment I will have a lot of problems :-P Hope it helps you, Rodrigo Antony Paul wrote: Thanks for the reply I want the browser to point to the query page if user did not provide enough data or an error happens like database connection is not available. I want user to re enter data or wait for some time . So I dont want to use requestDispatcher.forward() method or redirect to an error page. I want to know is there any problems in using the return statement in servlets/jsp. Antony Paul - Original Message - From: Nikola Milutinovic [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Friday, October 31, 2003 12:00 PM Subject: Re: Use of return statement in servlet. Antony Paul wrote: Hi, If any one feel it off topic mark it as off topic. I want to exit from a servlet if no database connection is available. For this can I use a return statement in the beginning of a servlet. Will it cause any state problems. I dont like putting the code in an if block. There will be lots of if blocks. A servlet is a web application component. It is invoked when a web client makes a request. The client expects SOMETHING as a response from the server and, thus, from the servlet. So, quitting with no response is not a good practice. What you should do is display an error page. There are several ways you can do it, requestDispatcher.forward() or throw an exception and have custom error pages ready. Nix. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Opinions
Also, depending on the amout of static content in your webapps, having an Apache as the front-end can perform better than a standalone tomcat. But this depends on numbers you have to get by yourself. Experimenting uses to be the best way ;-) Rodrigo Vincent Aumont wrote: François, Oh, and last but not least, I didn't find a privilege separation method in tomcat (like in apache or ssh or postfix, or...). Perhaps am I wrong, but, if you want tomcat to run in unpriviledge environment, you have to make it bind to a public port (say 8080). I use iptables to redirect connections from 80 to 8080: No, you're right. You can make Apache listen on port 80 while running as root because it'll change the process' ownership when it opens a new connection. There is no portable way of doing this in Java; therefore, you have to run Tomcat as root if you want to make it listen on port 80. Of course, that's a major security hole. I always front-end TC with Apache and use mod_proxy to achieve what you're doing with iptables. -Vincent. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: where should i store a attribute
Edson Alves Pereira wrote: Hello folks, i´m trying to store a database connection in a session attribute or request attribute, but i must choose a name that just one thread per time would knowns. Any idea? If you put the attribute in your request, the name does not matter: only forwarded or included servlets / JSPs will have access to the object, even if the same name is always used. If you want each request to use a different instance of an object, request attributes are the correct place. Session attributes are best fitted for instances that must be shared among multiple requests from the same user (well, exactly from the same user session ;-). Anyway, consider also to execute your DB queries internally and put as attribute the results instead of the connection. It is usually better :-) Regards, Edson - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Virtual Files
Try to create a servlet-mapping in your web.xml that directs all requests in a directory to your servlet / JSP. For example, if you put: servlet-mapping servlet-nameVirtualFileServlet/servlet-name url-pattern/vfiles/*/url-pattern /servlet-mapping All URLs beginning with [context]/vfiles will be redirected to the VirtualFileServlet. Consult the servlet specification for details on the pattern matching algorithm, to know which mappings will be overriden by this declaration :-) HTH, Rodrigo Duncan wrote: Don't know if this is possible with tomcat but; I need people to be able to request virtual files in a directory of a web application. As in: A user would request a file (which doesn't exist). This would call a jsp page which would return output based on the name of the file requested, but the user would still see the filename as the one which they originally requested. I thought that perhaps changing the 404 error page to my jsp file may work, but is it possible to set the 404 error page for just one directory? I would prefer a differant method if there is one. Thanks for any help anyone can give. Duncan Smith Decker Telecom Ltd - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Virtual Files
Well, if you don't precompile JSPs,there is another way to map a JSP: servlet servlet-nameMyServlet/servlet-name jsp-file/MyPage.jsp/jsp-file /servlet jakarta wrote: You can set up mappings to jsp pages servlet servlet-nameorg.apache.jps.MyPage_jsp/servlet-name servlet-classorg.apache.jps.MyPage_jsp/servlet-class /servlet servlet-mapping servlet-nameorg.apache.jps.MyPage_jsp/servlet-name url-pattern/some/dir/you/would/like/to/use/*/url-pattern /servlet-mapping Any page called from /some/dir/you/would/like/to/use/ Ie /some/dir/you/would/like/to/use/itworks.jsp Would go to the MyPage.jsp -Original Message- From: Duncan [mailto:[EMAIL PROTECTED] Sent: Friday, October 31, 2003 11:02 AM To: Tomcat Users List Subject: Virtual Files Don't know if this is possible with tomcat but; I need people to be able to request virtual files in a directory of a web application. As in: A user would request a file (which doesn't exist). This would call a jsp page which would return output based on the name of the file requested, but the user would still see the filename as the one which they originally requested. I thought that perhaps changing the 404 error page to my jsp file may work, but is it possible to set the 404 error page for just one directory? I would prefer a differant method if there is one. Thanks for any help anyone can give. Duncan Smith Decker Telecom Ltd - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Session vs. Application Replication
I agree with this inquiry. I think replication of application context attributes is conceptually as necessary as session replication. I usually store things like connection information to back-end servers, counters and other stuff that I need to share among all sessions. If I need to dinamically modify any of these data, I would like it to be modified in all cluster nodes. Regards, Rodrigo Ruiz - Original Message - From: Karthik Duddala [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, October 29, 2003 9:23 PM Subject: RE: Session vs. Application Replication So, is there a way I could do application context replication? Karthik Duddala Developer - Web Team Commerce Technologies Ph. 518-886-0700 x. 3881 Mike Curwen [EMAIL PROTECTED] To 'Tomcat Users List' 10/29/2003 02:59 [EMAIL PROTECTED] PM cc Subject Please respond to RE: Session vs. Application Tomcat Users Replication List [EMAIL PROTECTED] rta.apache.org Looking at the bottom of this page: http://www.javagroups.com/javagroupsnew/docs/success.html I'd say Filip liked it for Session replication. -Original Message- From: Karthik Duddala [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 29, 2003 1:56 PM To: Tomcat Users List Subject: RE: Session vs. Application Replication Could we use JGroups to replicate application context? Any thoughts ?? thanks Karthik Duddala Developer - Web Team Commerce Technologies Ph. 518-886-0700 x. 3881 Shapira, Yoav [EMAIL PROTECTED] .com To Tomcat Users List 10/29/2003 12:28 [EMAIL PROTECTED] PM cc Subject Please respond to RE: Session vs. Application Tomcat Users Replication List [EMAIL PROTECTED] rta.apache.org Howdy, Let's say we have a preferences object in each of the jvms running on each of the application instances and on one instance we update a preference (this is a java package that we are using to store user and system preferences called java.util.prefs which is a singleton in the JVM, part of Oh, JDK 1.4 preferences are not a trivial example. The backing store could be different from one JVM to another in the cluster. But in general, when we have something that could change at the application level (and not at the user's session level) we need to find a way to communicate that to every other instance To toss out another approach: you could have a PropertyChangedEvent sent to a JMS topic. All your apps will be listening for messages in this topic, and each one can handle the PropertyChangedEvent as it needs. I'm glad you started giving more concrete examples of what you're looking for. Just saying I need application replication is confusing at best: it's hard to help with that ;) Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSP generated HTML code squashed in one line
Check your pages do have DOS-style EOLs.
If you have javascript code like:
fuction a() {
// comment
...
}
and IE is merging all in a single line, the closing bracket will become part
of the comment, so the interpreter will fail to find it.
You could check if this is the problem by editing a failing JSP, and
changing all line comments by /* */ (or removing them at all :-)
This problem is common when you pack a war in Unix and put it into a Tomcat
installed under Windows, but this is the first time I hear about it in an
only-windows environment. Why are there differences between XP and 2K, I
cannot say :-(
I have never test it, but I guess there is another workaround if the problem
is the EOL style of your JSPs. In your tomcat, you can modify your
conf/web.xml, and set the mappedfile init parameter of the jsp servlet to
true. This should force jasper to generate JSPs that do a println for each
JSP line, instead of merging multiple static lines into a single print. This
way, the standard EOL sequences will be sent to your browser.
Another approach, if you develop in Unix is to force the correct EOLs before
packaging, for example, through ant task fixCRLF.
Hope this helps you,
Rodrigo Ruiz
- Original Message -
From: Baer Peter Christoph Alexander [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: Kokemueller Detlef [EMAIL PROTECTED]; Al-Khwlani
Khaled [EMAIL PROTECTED]
Sent: Tuesday, October 28, 2003 6:15 PM
Subject: JSP generated HTML code squashed in one line
Hi,
we have a problem here that looks pretty strange to us. We have
extensively
searched the mail archive and we googled a lot, but found no suitable
information. Should we nevertheless ask something obvious, please forgive
us.
Here is the problem:
Tomcat 4.0.6 LE generates HTML pages with a lot of the code compressed
into
a single line, when running on *some* machines under Windows XP. That is,
the first line of the generated HTML is very long. This appears to confuse
MSIE: We see lots of runtime exceptions regarding missing closing braces
(}).
On another machine, running Windows 2000, an apparently identical
installation works just fine. No such runtime errors.
We found another difference in the work directory tree. The filenames of
the
servlets on the Win XP machines start with _0002 and contain this string a
number of times each. On the Win2k computer we have just jspname$jsp.java
as
the name of the generated servlet.
We don't know, if the two phenomena are connected, and we are absolutely
clueless what the differences are caused by.
If anyone of could give us a hint of how to make the Win XP installations
work as properly as the Win2k instance, your help will be greatly
appreciated!
Our environments are: Windows 2000 (works fine) and Windows XP (sucks),
J2SDK 1.4.2_01 from Sun and Tomcat 4.0.6 LE.
Many thanks in advance!
Regards
Peter Bär
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Needed more support for catalina.base in Bootstrap
Hi all, Recently I have been trying to install and configure an OGSA server (www.globus.org) deployed over a Tomcat container. The problem I have is that it requires a lot of Tomcat customization: additional connectors in the server.conf, additional jars in the common/lib, common/endorsed and server/lib directories, conf/web.xml modifications, and so. In order to keep track of these changes, I decided to use a shared Tomcat installation, and do all the dirty business in a separated Tomcat instance, pointing CATALINA_BASE to it. Doing this I noticed that there was no place for putting my common/lib and server/lib jars. Digging in the source code, I found that CATALINA_BASE is not used at all when building the common and catalina class loaders. I think such a feature would be interesting not only for me, but for anyone who wants (or needs) to use custom valves, realms, etc, and so I have attached a patch to make it possible. The patch makes Tomcat to detect if catalina.base is defined to a value different from catalina.home, and if so, it adds the same directories to the class paths of the internal classloaders. Using this patch, I can create a common/lib and a server/lib on my separated Tomcat instance, and they are added to the correct classpath on startup. This is my first patch for Tomcat, so any comments or suggestions will be welcome :-) GRIDSYSTEMSRodrigo Ruiz Aguayo Parc Bit - Son EspanyolR D 07120 Palma de Mallorca[EMAIL PROTECTED] Baleares - España Tel:+34-971435085 www.gridsystems.comFax:+34-971435082 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Needed more support for catalina.base in Bootstrap
Thanks for your responses, I will follow your suggestions :-) - Original Message - From: Shapira, Yoav [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Tuesday, October 28, 2003 3:16 PM Subject: RE: Needed more support for catalina.base in Bootstrap Howdy, What Steve said is right on target. Your patch is not likely to make it into the tomcat code base ;) A couple of other pointers, however: - Patches are always welcome -- so thanks for contributing ;) - Don't attach them to messages: open a bugzilla enhancement request and attach your patch, or better yet, a diff file from current sources to your patch, in the bugzilla issue. - You may wish to discuss the need for and intent of your patch on the dev list before writing the patch itself. - If you intend to contribute more, which I hope is the case, please read the guidelines for getting involved with jakarta: http://jakarta.apache.org/site/getinvolved.html Yoav Shapira Millennium ChemInformatics -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 28, 2003 7:19 AM To: Tomcat Users List Subject: Re: Needed more support for catalina.base in Bootstrap From: Rodrigo Ruiz [EMAIL PROTECTED] Recently I have been trying to install and configure an OGSA server (www.globus.org) deployed over a Tomcat container. The problem I have is that it requires a lot of Tomcat customization: additional connectors in the server.conf, additional jars in the common/lib, common/endorsed and server/lib directories, conf/web.xml modifications, and so. In order to keep track of these changes, I decided to use a shared Tomcat installation, and do all the dirty business in a separated Tomcat instance, pointing CATALINA_BASE to it. Doing this I noticed that there was no place for putting my common/lib and server/lib jars. This sounds backwards. When using separate CATALINA_HOME and CATALINA_BASE locations, CATALINA_HOME - the central location. Classes used by tomcat (server and common respositories) are taken from this location. You'll also use the bin directory for this location. CATALINA_BASE - the lightweight installations. These contain web applications, their own logs, own configuration files, and make use of their own shared class repositories. If you think about it, this makes sense: separate CATALINA_BASEs can have different web applications, so the set of web application library depencies can vary from one CATALINA_BASE to the next. Digging in the source code, I found that CATALINA_BASE is not used at all when building the common and catalina class loaders. That's correct. CATALINA_BASE uses the shared class loader, and CATALINA_HOME uses common and server. -- Steve - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Forking high loaded servlet
Depending on the kind of request you are trying to accelerate, you could also do some caching in the response. Depending on what the servlet is intended to do, the strategies to apply can vary a lot. A description of the servlet execution would allow people to help you better :) Regards, Rodrigo Ruiz - Original Message - From: Peter Lin [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Friday, July 04, 2003 5:31 PM Subject: Re: Forking high loaded servlet I haven't followed this thread too closely, but what kind of concurrent requests you looking at? i ask this because the number of concurrent threads in most cases is the result of hardware limitations. if you want to double the concurrent requests, get more cpu and multiple gigabit ethernet cards. trying to do it with servlet tricks (aside from server.xml configuration) won't do much in the long run. peter Sergio Juan [EMAIL PROTECTED] wrote: - Original Message - From: Diego Castillo To: Sent: Friday, July 04, 2003 3:05 PM Subject: Forking high loaded servlet Hi all, I have a servlet that receives a heavy load. I would like to process multiple requests in parallel in order to increase throughput. Tomcat creates one single instance of the servlet. This is right according to servlet specification paragraph 3.2, but it does not suit my needs. I have tried extending SingleThreadModel and Tomcat does create multiple instances, but I get the exact same throughput. Tomcat automatically creates one thread per request. If your servlet does not have synchronization issues, it will be the same creating an object per thread that using the same object (in fact a little heavier in the first case, because of the overhead of creating objects). I have also tried launching a new thread for handling HttpServletRequest HttpServletResponse, but as soon as the servlet exits service(), the response output stream gets closed by Tomcat. Same here.. you are launching a Thread inside of an already independent Thread. Is there any spec compliant strategy to increase the number of requests per second that a servlet can handle? In configuration you can set the processors number, but I think it is not the issue. If the problem is that you got a bottleneck in your host (CPU or disk at nearly 100%) you should consider load balancing between multiple servers in different machines or using common programming performance tricks (but I think you have already done that). Regards. Thanks in advance, Diego - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: does the getRequestDispatcher().forward() method return control?
AFAIK, the only way in java to get what you ask for, is to raise an Exception at the end of the forward() method. Even doing so, you could wrap the forward() call in a try / catch block, avoiding whatever mechanism the servlet engine could use to get the desired behaviour. Thespecification says that no ouput must be commited from the calling servlet *before* the forward() call, but says nothing about conditions after the call (Servlet 2.3 Spec. SRV 8.4). If normal control flow should be broken after the call, I think the Java Team would be in great problems ;-) Hi, I think this is a bug as per the servlet specification.Just check with some other servlet engine. I will forward this error to tomcat developer list. I was tested with Tomcat3.2.2. Velmurugan P. Java Team. Hi, if in a servlet, I have some code like: getServletConfig().getRequestDispatcher(/my/page.jsp).forward(request, response) Is it supposed to return control to the servlet afterwards? From what I find on the net, it isn't, but when I try to print something to System.out after the forward call, that works... So did I misread on the www, or is this some bug in my webserver? I'm using JBoss/Tomcat btw... Thanks, Hans - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Programmatic login
I think the same Bill implements with a Valve could be implemented with a
Filter with an HttpRequestWrapper for setting the principal. Am I right?
- Original Message -
From: Bill Barker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, November 17, 2002 8:53 AM
Subject: Re: Programmatic login
The following is a bare-bones implemetation. Posted under the standard
Apache Licence.
import java.io.*;
import java.security.Principal;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.catalina.*;
public class MyValve implements Valve {
public MyValve() {}
public void invoke(Request request, Response response, ValveContext
context)
throws IOException, ServletException {
HttpSession session = ((HttpServletRequest)request.getRequest())
.getSession(false);
if(session != null) {
Principal user =
(Principal)session.getAttribute(my.login.principal);
if(user != null) {
((HttpRequest)request).setUserPrincipal(user);
}
}
context.invokeNext(request, response);
}
}
Zsolt Koppany [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Hi,
it sounds very interesting. Could you provide some implementation details
(source code)?
Zsolt
On Saturday 16 November 2002 08:26, Bill Barker wrote:
setUserPrincipal
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Re: How to add a servlet to a new Webapp
If you copied the examples web.xml, then you must have a lot of references to servlet classes and filters not present in your new webapp. This can make the context not to be created, because of exceptions raised during context initialization. Try to delete all unused entries before starting the server :-) Hope it helps - Original Message - From: Curley, Thomas [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, November 28, 2002 2:37 PM Subject: RE: How to add a servlet to a new Webapp Jim - its in both webapps under classes - com.wrox.projsp.ch03.TestServlet -Original Message- From: Collins, Jim [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:35 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp You mention in your first post that the servlet works if you create the package structure in WEB-INF/classes. Is the servlet no longer in this directory? -Original Message- From: Curley, Thomas [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:29 To: Tomcat Users List Subject: RE: How to add a servlet to a new Webapp Correct ! - I origionally copied the examples web.xml -Original Message- From: Collins, Jim [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:28 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp Thomas has got a mapping to the invoker servlet in the web.xml file he posted so it should not be a problem. -Original Message- From: mech [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:25 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp This problem is new with 4.1.12. For security reasons the invoker servlet had been disabled in the global /conf/web.xml file. This invoker servlet usually loads user servlets that are not mapped correctly as far as i understand. This is done by using a default mapping /servlet/*. In productive systems this should not be done, instead correct mapping is required. In the /examples webapp the invoker servlet had been enabled again with the local web.xml. That's why it's working in examples and not in study. Because in your study web.xml you won't have it enabled manually and thus the default from /conf/web.xml ist used where this feature is disabled. Thus the mapping /servlet/... to servlets is just Tomcat specifically done via the invoker servlet which is now (4.1.12+) disabled by default. But actually you should not need /servlet/ at all, if your mapping is correct. Try http://localhost:8080/study/com.wrox.projsp.ch03.Testservlet or make a shorter mapping to /study/Testservlet in your web.xml mech -Original Message- From: Curley, Thomas [mailto:[EMAIL PROTECTED]] Sent: Donnerstag, 28. November 2002 14:06 To: Tomcat Users List Subject: RE: How to add a servlet to a new Webapp Well I also tried http://localhost:8080/study/servlet/com.wrox.projsp.ch03.TestServlet but the same whereas http://localhost:8080/examples/servlet/com.wrox.projsp.ch03.Te stServlet works ?? Thomas -Original Message- From: Collins, Jim [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:04 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp I believe that servlet has been disabled by default in 4.1.12 for security reasons. That is probably why you can't use: http://localhost:8080/study/servlet/TestServlet Jim -Original Message- From: Curley, Thomas [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 12:58 To: [EMAIL PROTECTED] Subject: How to add a servlet to a new Webapp Hi All, Using Tomcat 4.1.12 on Win 2K I am getting a 404 error when I try to create a new webapp and add a very basic servlet. The servlet works if I create the package structure within the examples WEB-INF/classes. Here are the steps: 1. created webapps/study 2. created .../study/WEB-INF/classes/com/wrox/projsp/ch03/TestServlet.jav a and compiled [ok] 3. added the following line to server.xml after the examples /Context Context path=/study docBase=study debug=0 /Context 4. just copied the examples web.xml to study/WEB-INF and added the following lines servlet servlet-name TestServlet /servlet-name servlet-class com.wrox.projsp.ch03.TestServlet /servlet-class /servlet servlet-mapping servlet-nameTestServlet/servlet-name url-pattern/TestServlet/url-pattern /servlet-mapping 5. restart tomcat RESULT - The requested resource
Re: How to add a servlet to a new Webapp
Thomas, filters are classes that preprocess / postprocess servlet requests. Defining a filter, you are instructing the server to pass the requests to a specified filter, instead of directly passing it to the servlet. Filter is responsible of redirecting the request to the servlet between pre and postprocess. If you remove from your web.xml all filter, and filter-mapping tags, the webapp should still work properly. As some pointed in previous messages, the invoker servlet was disabled in Tomcat 4.1.12. This was done because of a security hole that allowed a hacker to obtain the source code of your JSPs through direct invocation to this servlet. The invoker servlet is the one used for serving requests of the style /servlet/MyServlet. This means that having the invoker servlet disabled you cannot access your servlet with such a URL. But you have an entry in your web.xml that makes the last point irrelevant: servlet servlet-nameTestServlet/servlet-name servlet-classcom.wrox.projsp.ch03.TestServlet/servlet-class /servlet servlet-mapping servlet-nameTestServlet/servlet-name url-pattern/TestServlet/url-pattern /servlet-mapping With these lines you are specifying that you can access your servlet directly with a URL with the form: http://yourserver/study/TestServlet Without the /servlet/ part. URLs with /servlet/ are useful for accesing servlets that don't have an associated mapping, but in your case, as you explicitly mapped it to /TestServlet, you can use this mapping. - Original Message - From: Curley, Thomas [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, November 28, 2002 3:14 PM Subject: RE: How to add a servlet to a new Webapp Hi, this is now working thanks to you all. Attached is the web.xml. As Rodrigo stated I pruned it down and it turns out that at a min I need the 'Servlet Mapped Filter', the invoker mapping. If anyone can explain the web.xml file in plain lang / what filters do and how to get rid of the invoker then please do Thomas -Original Message- From: Curley, Thomas Sent: 28 November 2002 13:48 To: Tomcat Users List Subject: RE: How to add a servlet to a new Webapp thanks - will try -Original Message- From: Ruiz [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:46 To: Tomcat Users List Subject: Re: How to add a servlet to a new Webapp If you copied the examples web.xml, then you must have a lot of references to servlet classes and filters not present in your new webapp. This can make the context not to be created, because of exceptions raised during context initialization. Try to delete all unused entries before starting the server :-) Hope it helps - Original Message - From: Curley, Thomas [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, November 28, 2002 2:37 PM Subject: RE: How to add a servlet to a new Webapp Jim - its in both webapps under classes - com.wrox.projsp.ch03.TestServlet -Original Message- From: Collins, Jim [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:35 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp You mention in your first post that the servlet works if you create the package structure in WEB-INF/classes. Is the servlet no longer in this directory? -Original Message- From: Curley, Thomas [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:29 To: Tomcat Users List Subject: RE: How to add a servlet to a new Webapp Correct ! - I origionally copied the examples web.xml -Original Message- From: Collins, Jim [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:28 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp Thomas has got a mapping to the invoker servlet in the web.xml file he posted so it should not be a problem. -Original Message- From: mech [mailto:[EMAIL PROTECTED]] Sent: 28 November 2002 13:25 To: 'Tomcat Users List' Subject: RE: How to add a servlet to a new Webapp This problem is new with 4.1.12. For security reasons the invoker servlet had been disabled in the global /conf/web.xml file. This invoker servlet usually loads user servlets that are not mapped correctly as far as i understand. This is done by using a default mapping /servlet/*. In productive systems this should not be done, instead correct mapping is required. In the /examples webapp the invoker servlet had been enabled again with the local web.xml. That's why it's working in examples and not in study. Because in your study web.xml you won't have it enabled manually and thus the default from /conf/web.xml ist used where this feature is disabled. Thus the mapping /servlet/... to servlets is just Tomcat specifically done via the invoker servlet which is now (4.1.12+) disabled by default. But actually you should not need /servlet/ at all, if your mapping is
Re: bug in tomcat converting xml using xslt?
Dionisio, Your transformamaquinas bean is internally calling response.getWriter(). This interfere with the JSP, as it calls the same method internally to create the out variable. If you use this code inside a servlet you should have no problem. For using the bean in a JSP, you should use out, instead of the getWriter() return value. If transformamaquinas is yours (it seems so, by the package name ;-), you should try to add an alternative method in which you pass out too, instead of only the request. This way you will have no problems with JSPs. I suppose you pass the request to be able to call other request methods. If you don't use it, you could also replace the parameter, instead of adding a new one. - Original Message - From: Dionisio Ruiz de Zarate [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, November 28, 2002 4:16 PM Subject: bug in tomcat converting xml using xslt? Hello from the http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/xslt/work/Stylizer.java i have load one classe and i have transform it (i attach the classe). this class run welss on RESIN , this class transform one XML using one XSLT tempalte and produces HTML. for using i make this: jsp:useBean id=transformamaquinas scope=page class=utils.formateo.Transformacion / and where i whant to show the XML transform i writte this: % //esta String (kk) hay el resultado de una consulta a una bd que me lo mete en formato xml, bien fomado y validado. String kk = maquinas.selectTodasMaquinas(0, 0, 1,0); //la xslt String xslStyleSheet = application.getRealPath(HomeMaquinas.xslt); //la transformacion transformamaquinas.Transforma(kk, xslStyleSheet, response); % this in resin works well but in tomcat 4.1.12 show the bellow error. Can you help me? thanks ERROR: 2002-11-28 00:10:52 StandardWrapper[:invoker]: Loading container servlet invoker 2002-11-28 00:10:52 HostConfig[pruebas.irudia.com]: Deploying configuration descriptor xml.xml 2002-11-28 00:11:20 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception org.apache.jasper.JasperException: getWriter() has already been called for this response at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2 48) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:260) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:191) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180 ) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve. java:170) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:641) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172 ) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :174) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok eNext(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:256) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:361) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:563) at
Re: Tomcat NT Service Runtime.exec()
At least, doing so you should be able to test you are doing things well. We have developed a service (an internal project, not Tomcat related), and it's able to execute any program, including shells. Check the security policy used by your Tomcat service. Perhaps you are not allowed to call the Runtime.exec() method. - Original Message - From: Jacob Kjome [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Monday, November 25, 2002 5:29 PM Subject: Re: Tomcat NT Service Runtime.exec() For each NT service, there is an option called Allow service to interact with desktop under Properties / Log On. Check that option and what you ask for should work just fine. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: How does servlets know it is a page refresh?
Take a look at this example chapter from the book Core J2EE Patterns: http://vig.pearsoned.com/samplechapter/0130648841.pdf On page 10 of the pdf (43 on the book :-), it speaks about this subject, and a good strategy to address it Hope it helps, Rodrigo I have some servlets serving html pages from the servlet engine. suppose the user click the refresh button of the browser. How does the servlet know that the user wants a refresh of the page? My servlet needs to know if it is a refresh since if it processes the same request twice in a row, it may produce unexpected results by the issuing the same comand twice. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Retrieving SSL client certificates from the Request
Hi all, Can I retrieve the SSL client certificate from an incoming request and use it in another one? Let me explain the background: We have implemented a server that only accepts SOAP requests. The purpose of this server is to act as a job dispatcher for a cluster of N machines. The jobs to execute are defined by the users, so we designed it to have a public API (accesed via SOAP calls), with which we can define jobs, upload executable files and resources and control execution in the cluster. Currently, it uses basic authentication for all connections, but we are planning to pass to a two-way SSL authentication model in a short time. Users access this server through different front-ends, ones more specialized than others. Some of them are themselves web applications. We want our front-end to capture the client certificate from a request, and use it to authenticate itself in its calls to our SOAP server. We need this capability, because each user can have different permissions, and we don't want all connections through the front-end to be made with a common certificate. Also, we want to avoid the need to register the clients in our front-end, as it should act as a simple proxy to our soap service. Is this possible from a servlet? We are now using Tomcat 3.3.1, and migrating to 4.1.12 for client certificate authentication support. Any help would be appreciated -- GRIDSYSTEMSRodrigo Ruiz Aguayo Parc Bit - Son EspanyolAnalista Programador 07120 Palma de Mallorca[EMAIL PROTECTED] Baleares - España Tel:+34-971435085 www.gridsystems.comFax:+34-971435082 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: 2ND TRY: Developing ASP applications with tomcat
Giovanni, If you cannot change the third party library behaviour, then you will have to put that jar into each webapp. Anyway, you can put any other library in shared/lib if it does not need to load resources. Also, take into account that depending on the way forum.jar was implemented, it could be impossible to use it in a multi-context environment (for example, singleton patterns could lead to extrange behaviours in which one context interfere with others) The rule of thumb is that no class in shared/lib will be able to see any class from your webapps. Well, unless you use Thread.getCurrentThread().getContextClassLoader() to load the class, of course. For example, if you write code that does not need to access any class from your webapp (including forum.jar), you should be able to put it in shared/lib. If you use getContextClassLoader().loadClass(), you will have to deal with the reflection api. This make things harder to program and also a bit slower. If there is any other way, sorry, but I haven't heard about it Hope it helps - Original Message - From: Turner, John [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Wednesday, November 20, 2002 3:07 PM Subject: RE: 2ND TRY: Developing ASP applications with tomcat You can share a JAR across Contexts. From the ClassLoader HOWTO http://jakarta.apache.org/tomcat/tomcat-4.1-doc/class-loader-howto.html Shared - This class loader is the place to put classes and resources that you wish to share across ALL web applications (unless Tomcat internal classes also need access, in which case you should put them in the Common class loader instead). John -Original Message- From: Giovanni Cuccu [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 20, 2002 8:38 AM To: Tomcat Users List Subject: RE: 2ND TRY: Developing ASP applications with tomcat At 07:47 20/11/2002 -0500, you wrote: John, thanks for the response My advice would be use a separate tomcat instance for every customer, for one very simple reason: if the forums for customer A hang for whatever reason, you would be able to restart their Tomcat instance, and only their Tomcat instance. In your scenario, customers B, C, and D would also be restarted, losing their sessions and anything in progress. If customer B happens to be making a big change to a database at the time, they would be screwed. yes it's true, but if I use different contexts I can reload each context with no problem. I agree about issues on consumption of shared resource such as memory, file/socket descriptor. Yes, from an academic standpoint it makes sense to try and use the same JAR file for every customer or site, but in practice that isn't always the best way to go if the big picture is considered. Since customers in an ASP scenario pay for disk space, the cost to you for having multiple JAR files is zero. In addition, you may run into situations in the future where customer A pays for a version upgrade of some software (requiring a new JAR file) but customer B does not. How would you handle that if they shared the same JAR? John I agree with you, but consider a lot of little customers with low traffic (in the example 50 message forum/DAY) I believe using a jvm for each of these could be a waste of resources. About the question of version update an ASP application can have updates included in the annual fee, and for reducing internal costs all customers should have the same software version (I believe this is recommended if you want make ASP model profitable). What it's still unclear to me is if: is it possible to share the same jar between contexts (with the restrictions of the classpath I explained before (I think the answer is negative but I'd like to have a confirm on this))? thanks in advance Giovanni -Original Message- From: Giovanni Cuccu [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 20, 2002 3:16 AM To: Tomcat Users List Subject: Re: 2ND TRY: Developing ASP applications with tomcat At 23:59 19/11/2002 -0800, you wrote: thanks for the response, but the load occurs in library that I cannot modify. my problem is how to share some classes including servlets and deploying only the jsp part. For example consider a forum application the logic, including servlets is in a jar (i.e forum.jar) and the jsp in each context. If I have multiple customers can I create multiple contexts on the same instance or should I startup a different tomcat instance for each customer? the problem I'm facing is that a class put in the shared lib cannot load via classpath a resource file under WEB-INF. returning to the forum example, if the class in the jar try to load a property file for reading the configuration it fails
Re: 2ND TRY: Developing ASP applications with tomcat
I find the next article clear to understand: http://otn.oracle.com/oramag/oracle/02-sep/o52oc4j.html It presents a perspective of the class loading problems that can arise in a J2EE application. You can skip all the Oracle specific part, if you want. It makes some mentions to the uses of getContextClassLoader(). For Reflection API, you could start by http://java.sun.com/docs/books/tutorial/reflect/ and http://developer.java.sun.com/developer/technicalArticles/ALT/Reflection/ You can use reflection API, for example, to: - Instantiate an object from the context classloader. For example, objects from your forum.jar library :-) - Invoke methods of an object created inside a webapp (get the classloader, obtain the correct Class, get the Method object and use it) - Access values of object fields, similar to method invocation case. - Get resources from the calling context (via the getContextClassLoader().getResourceAsStream() method) - Original Message - From: Giovanni Cuccu [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, November 20, 2002 4:08 PM Subject: Re: 2ND TRY: Developing ASP applications with tomcat At 15:39 20/11/2002 +0100, you wrote: . The rule of thumb is that no class in shared/lib will be able to see any class from your webapps. Well, unless you use Thread.getCurrentThread().getContextClassLoader() to load the class, of course. If you use getContextClassLoader().loadClass(), you will have to deal with the reflection api. This make things harder to program and also a bit slower. Rodrigo, can you give more details about this (articles on the web, code snippets,etc)? Thanks in advance, Giovanni Giovanni Cuccu Sw [EMAIL PROTECTED] Dianoema S.p.A. Via de' Carracci 93 40131 Bologna Tel: 051-4193911 e-mail:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Coyote Connector won't listen on port 8004, only 8009 (Tomcat 4.1.12)
Brandom, I experienced this problem yesterday. It was a problem with my CATALINA_HOME variable. I was starting a Tomcat in directory A, but CATALINA_HOME was pointing to directory B, and my CATALINA_BASE was undefined. The result: tomcat was being started up with the B configuration. Perhaps you are in the same case :_) - Original Message - From: Brandon Cruz [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Tuesday, November 19, 2002 5:29 PM Subject: RE: Coyote Connector won't listen on port 8004, only 8009 (Tomcat 4.1.12) Connector className=org.apache.coyote.tomcat4.CoyoteConnector port=8004 minProcessors=5 maxProcessors=75 enableLookups=true redirectPort=8443 acceptCount=10 debug=0 connectionTimeout=2 useURIValidationHack=false protocolHandlerClassName=org.apache.jk.server.JkCoyoteHandler/ Even with the above configuration, this connector tries to start up on port 8009. Anyone know why? Brandon -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Java q: round to n decimal points?
- Original Message -
From: Josh G [EMAIL PROTECTED]
To: Tomcat Users List [EMAIL PROTECTED]
Sent: Thursday, November 14, 2002 7:53 AM
Subject: Java q: round to n decimal points?
Is there a nice easy way to round a double to n decimal points? I couldn't
see anything in Math,Double,String, or NumberFormat...
if you want a double result, you can do the following:
double round(double value, int numDecimals) {
double factor = 1.0;
// This calculation could be improved for high numDecimal values
while (numDecimals-- 0) factor *= 10.0;
return Math.round(value * factor) / factor;
}
if you just need it for presentation, it could be enough to have a String
representation:
String getRounded(double value, int numDecimals) {
String template = 0.000;
if (numDecimals 0) numDecimals = 0;
String mask = template.substring(0, 2 + numDecimals);
java.text.DecimalFormat df = new java.text.DecimalFormat(mask);
return df.format(value);
}
Hope it helps :-)
PS: The code is not necessarily bug-free or optimal ;-)
-Josh
--
And can you tell me doctor why I still can't get to sleep?
And why the channel 7 chopper chills me to my feet?
And what's this rash that comes and goes, can you tell me what it means?
God help me, I was only 19
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Re: how many tomcat in a machine?
It all depends on the workload they must support. In my single CPU (800MHz / 256Mb / IDE HD), I usually have two or three Tomcats for development, but that's because the workload in my machine is very low (only one client, me :-) In production, you should test how performance degrades when you add another Tomcat server. Without benchmarking it's imposible to know the answer to your question, as it all depends on your applications, and the use you make of them. Anyway, a single tomcat instance can be configured to serve multiple web applications from different ports, or virtual hosts if you prefer. And it will need less resources than multiple ones. You could consider it as an option. Hope it helps Rodrigo - Original Message - From: Jose Antonio Martinez [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, November 14, 2002 9:49 AM Subject: how many tomcat in a machine? how many tomcat server do you think can i put in a big machine like this? : Memory: 2G 2*CPU: PIII 1100 Mhz (aprox) Disk: scasi raid ___ Yahoo! Messenger Nueva versión: Webcam, voz, y mucho más ¡Gratis! Descárgalo ya desde http://messenger.yahoo.es -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: Standalone Tomcat : suppress directory listing in web.xml
Marc, in the message title you say you want to suppress directory listings, but in the content, you speak about preventing access to some directories. These are two completely different things. Almost all responses you are receiving are directed to the first issue, that is, preventing Tomcat from presenting its own directory page when you use a URLs like http://server/dir/. I can only add that the $CATALINA_HOME/conf/web.xml is just a web.xml template. You can override most configurations in that file, by copying the part you are interested in into your local web.xml, and making any modification there. Particularly, you can redefine the default servlet, and configure it as you want. So you don't need access to the global web.xml file :-) If we pass to the second issue, I see 3 options: 1. If you want to allow access to some directories only to certain logged in users, you can setup security constraints in your web.xml, as Craigh pointed before. 2. If you use those directories only for internal use of your servlets/jsps, you could move them inside the WEB-INF directory. This way nobody will have access to them from the web. 3. If you don't want to change directory locations (because there's too much code to change, for example), you could use security constraints, and allow access only to an inexistent role. You said that you cannot change conf/web.xml. I suppose you plan to deploy your webapp into a tomcat from a third person (client, ISP, or something). If this is the case, be sure you have some control or knowledge about the realm used by your webapp. If you cannot control the roles in the realm, the third option can be insecure, as you will not control if a specified role exists or will exist in the future. Hope it helps! - Original Message - From: Marc Mendez [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Wednesday, November 06, 2002 9:12 AM Subject: Re: Standalone Tomcat : suppress directory listing in web.xml - Original Message - From: Craig R. McClanahan [EMAIL PROTECTED] You can suppress directory indexes in the $CATALINA_HOME/conf/web.xml file. See the listings init parameter for the default servlet. Read my previous post. You have complete control over which requests your filter applies to, because you are defining a filter-mapping for it. In particular, if you use a URL pattern of /* in your filter mapping, then *all* requests for your webapp will go through the filter. Ok, I'll check -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Test
Please, ignore this mail. I'm just testing my messages arrive to this list -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: Standalone Tomcat : suppress directory listing in web.xml
Marc, in the message title you say you want to suppress directory listings, but in the content, you speak about preventing access to some directories. These are two completely different things. Almost all responses you are receiving are directed to the first issue, that is, preventing Tomcat from presenting its own directory page when you use a URLs like http://server/dir/. I can only add that the $CATALINA_HOME/conf/web.xml is just a web.xml template. You can override most configurations in that file, by copying the part you are interested in into your local web.xml, and making any modification there. Particularly, you can redefine the default servlet, and configure it as you want. So you don't need access to the global web.xml file :-) If we pass to the second issue, I see 3 options: 1. If you want to allow access to some directories only to certain logged in users, you can setup security constraints in your web.xml, as Craigh pointed before. 2. If you use those directories only for internal use of your servlets/jsps, you could move them inside the WEB-INF directory. This way nobody will have access to them from the web. 3. If you don't want to change directory locations (because there's too much code to change, for example), you could use security constraints, and allow access only to an inexistent role. You said that you cannot change conf/web.xml. I suppose you plan to deploy your webapp into a tomcat from a third person (client, ISP, or something). If this is the case, be sure you have some control or knowledge about the realm used by your webapp. If you cannot control the roles in the realm, the third option can be insecure, as you will not control if a specified role exists or will exist in the future. Hope it helps! -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: Authentication per-container level
Hello, Is it possible to configure Tomcat, that it must check an authentication for all the webapps hosted within the container ? I mean tell Tomcat to send an authentication popup when someone goes to the http://localhost:8080/. whithout configure each webapp hosted in. You can modify the conf/web.xml file, and add security constraints. This will cause all web-apps to follow these restrictions. This file is used by Tomcat as a template for all web.xml files, so any modification there will be equivalent to a modification in all deployed webapps. Also, you may want to activate the once-login support (I'm not sure about how to do this right now). Iris Hope it helps, Rodrigo -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: Security RISK !
I think the idea of letting Apache directly access to the files into the webapp is interesting. This way there is no need to replicate the static content for Apache, and Apache will be faster serving all static content than Tomcat . But, at least in my experience, static files tend to be localized. Probably, a better approach would be to configure Apache to access some subdirectories into the webapp, such as /images and /js directories if they exist. If you mantain dynamic files separated from static ones, this task will be even easier. This way, you can let Apache serve your static content without compromising security, and without replicating files. - Original Message - From: Tim Funk [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, October 24, 2002 12:08 PM Subject: Re: Security RISK ! 401/404 - Forbidden vs not found doesn't matter as long as the intruder is forbidden. Relying on confusing the user is a nice technique to preventing intruders since it may waste more of their time and make them more likely to give up. But that may make others more determined to try to break in. Depending on how apache is configured, the intruder will be able to view the HTTP response header and seeing you may be running mod_jk/mod_webapp or whatever. The intruder can also see if you are running jhtml,jsp, or /servlet/ - it will be easy to deduce you are using some servlet engine. Some servlet engines also set a session cookie per webapp. It would be easy to deduce that jsessionid cookie for /myfooapp indicates that /myfooapp is a webapp and it has a WEB-INF. So I will first ask for: http://bar/myfooapp/WEB-INF/web.xml. And hope I have a novice config and next ask for: http://bar/myfooapp/WEB-INF/ to see if I can get a directory listing. Then the fun really begins. Personally - I like my way better since I run multiple webapps on our servers. That way I don't have to explicitly protect each WEB-INF. (Which could get forgotten while installing a new webapp) Veniamin Fichin wrote: Tim Funk wrote: You'll want to protect your WEB-INF directory as well as any properties files. You can do that by using by the following in your httpd.conf: (This should be the syntax) Files ~ \.properties$ Order allow,deny Deny from all Satisfy All /Files Directory ~ /WEB-INF/ Order allow,deny Deny from all Satisfy All /Directory Recently I did something else. Say, I have a webapp named mine in Tomcat, and have this line in httpd.conf: Alias /mine /var/www/tomcat/webapps/mine/web I've made the web direcroty following recommendations described in section Source Organization of Tomcat docs (http://jakarta.apache.org/tomcat/tomcat-4.1-doc/appdev/source.html). So, instead of denying any access to WEB-INF directory, I wrote: Alias /mine/WEB-INF /something_that_does_not_exists And, when I access http://localhost/mine/WEB-INF , I get 404 Not found error instead of 403 Forbidden . I think you will be more confusive for the intruder if he'll be told that WEB-INF don't even exists there. Or is this less secure to do that? -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Environment variables in server.xml
Does Tomcat 4 still support environment variables into its server.xml file?
We would like our tomcat instances to automatically choose their HTTP port
from an environment variable.
It worked in Tomcat 3.3, doing something like:
TOMCAT_OPTS=-Dhttp.port=$HTTP_PORT
and using ${http.port} in our shared server.xml file.
Is it still possible to do this?
Thanks in advance
--
GRIDSYSTEMSRodrigo Ruiz Aguayo
Parc Bit - Son EspanyolAnalista Programador
07120 Palma de Mallorca[EMAIL PROTECTED]
Baleares - España Tel:+34-971435085
www.gridsystems.comFax:+34-971435082
--
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How to limit the number of connections per user?
Hi, is there any way to do this? I would like to be able to limit the number of connections per user for production environment. -- GRIDSYSTEMSRodrigo Ruiz Aguayo Parc Bit - Son EspanyolAnalista Programador 07120 Palma de Mallorca[EMAIL PROTECTED] Baleares - España Tel:+34-971435085 www.gridsystems.comFax:+34-971435082 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Error in servlet: Out of memory in PUT method
Hi all, I am working with Tomcat 3.3.1. I have implemented a servlet that processes PUT requests, in order to upload files to my server. I am doing some workload tests, and when I try to upload a file over 70Mbytes (aprox.), the server response shows an Out Of Memory Error. My servlet gets some headers for authorization, and after that, it gets the request input stream and starts to write the file. I have written some strings at the beginning and at the end of my servlet. If I upload a small file, all goes Ok. If I try to upload a big one, it raises the exception without even executing the System.out.println(). It seems like Tomcat trying to get all request before passing control to the servlet. Is it a consequence of the way Tomcat 3.3.1 serves requests? (I know PUT messages are not HTTP 1.0, but 1.1). Upgrading to Tomcat 4 could solve this problem? Thanks in advance -- GRIDSYSTEMSRodrigo Ruiz Aguayo Parc Bit - Son EspanyolAnalista Programador 07120 Palma de Mallorca[EMAIL PROTECTED] Baleares - España Tel:+34-971435085 www.gridsystems.comFax:+34-971435082 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Setting thread prority in Tomcat
See inlines :) - Original Message - From: Tim Funk [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, September 12, 2002 7:15 PM Subject: Re: Setting thread prority in Tomcat Nope. A servlet may run in any thread. The servlet itself may adjust its priority (if allowed by the security manager). But you would need to remember to also lower it since the next request (to maybe a normal servlet) to run in that thread would also run at that priority. A way to do this could be with a Filter. Just set the priority to the desired level before service is called, and return it to its original value after servlet process. Personally - unless who are running a high load site and the servlet is cpu intensive and long running - I don't think you'll notice a difference. I'm not sure, but I suppose a change in servlet thread priorities could have an important impact on performance. If the thread has higher priority than the thread receiving requests, a CPU intensive servlet will slow the rest of the server. Just be careful :-) Takumi Fujiwara wrote: Hi, Could someone please tell me if it is possible to adjust the priority of servlet serving thread based on which servlet it is serving? For example, I have 2 servlets in my Web Application. All threads serving Servlet 1 will have higher prority than Servlet 2. Can I config that in TomCat? Thanks for any help. Sam __ Do you Yahoo!? Yahoo! News - Today's headlines http://news.yahoo.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.386 / Virus Database: 218 - Release Date: 10/09/2002 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: RE: RE: Problems with class loader
Just an idea:
I would create a subclass of Hashtable, rewriting serialization code so it won't call
Hashtable code. I mean something like this:
private void writeObject(ObjectOutputStream out) throws IOException {
out.writeInt(this.size());
for (Enumeration keys = this.keys(); keys.hasMoreElements(); ) {
Object key = keys.nextElement();
Object value = this.get(key);
out.writeObject(key);
out.writeObject(value);
}
}
and the opposite for the readObject method.
This way, there is no object creation out of your webapp, while keeping the Hashtable
interface (just take care in hashtable creation and deserialization code. The rest
remains the same)
It seems to me that copying JRE libs into the webapp will cause a very big memory
overhead, as *ALL* core classes will be loaded twice in the JVM.
Hope it helps :)
Rodrigo
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, September 06, 2002 9:15 AM
Subject: RE: RE: RE: Problems with class loader
Hi Charlie,
thanks for your mail. After some heavy thinking (gee, this topic lasted
longer than expected! :-) ), we came to the following conclusion:
We will copy the HashTable.class to the application library. We believe
this is the best we can do because
(1) we maintain the concept of storing all classes, libraries and
information as close as possible to the application itself,
(2) even if HashTable.class changes between different JDKs, we have to
watch only this happen (i.e., the change of the JDK). Now, this will
happen, say, once every other year ;-)
(3) the other alternatives we were discussing are not applicable because
the expose too much code to too many classloaders.
The good thing is: we can be somewhat sure that the only class other than
our own classes is HashMap.class. Also, if necessary, we can copy the JRE
libs to the application.
I think this concludes this discussion. Thanks a lot for the discussion we
had. I enjoyed it very much!
Jürgen
Re: Processor Availability
Sending a QUIT signal works in Unix (Linux and Solaris), but Ctrl-D doesn't do anything in Windows 2000. Anybody knows something about it? Jeff, what kind of processing are you doing in your JSP/servlets? You could be experiencing deadlock problems. It's just an idea :-) Best regards, Rodrigo Ruiz - Original Message - From: Glenn Nielsen [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, August 29, 2002 2:20 AM Subject: Re: Processor Availability A good way to debug these types of problems is to tell the JVM to do a Thread stack dump. By reviewing the stack for each processor you can get an idea of what may be causing a problem. On unix you send the JMV a -QUIT signal. On Windows I think you use CTRL-D in the console for Tomcat. Another thing to check is whether long JVM garbage collection (GC) times are causing requests to stack up. While the JVM is doing GC handling of requests by Tomcat freezes. To get GC data add the arg -verbose:gc to your JVM startup options. Regards, Glenn Marinko, Jeff wrote: Thanks for the reply, Craig. I pretty much figured that was how it worked, but I was hoping for some kind of time out mechanism. Somehow, someway, I am able to lock up all 200 processors I defined for my Connector in TC (4.0.4, Java 1.4, Win2K). I'm guessing it is the machine that is at fault (very low powered), and that since each request potentially opens a connection to another machine, that may be the cause of the locking. Thanks! -Original Message- From: Craig R. McClanahan [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 27, 2002 4:19 PM To: Tomcat Users List Subject: Re: Processor Availability On Tue, 27 Aug 2002, Marinko, Jeff wrote: Date: Tue, 27 Aug 2002 13:45:05 -0700 From: Marinko, Jeff [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: Processor Availability Greetings! Tomcat uses processors to service requests, as processors free up, they then move on and process other requests. Each processor also possesses a thread, so you can think of the set of available processors as a thread pool. My question is this: Is there any way to lock up all the processors? Sure ... if you send n+1 simultaneous requests when you've only got n available processors, you're going to run out (assuming that each request takes enough time for all of them to get submitted before the first ones start completing. Such things happen occasionally when you get spkies of request activity, but it's usually a transient condition. The analog in plain old web sites is when a site gets Slashdotted :-). Is there a maximum time before a processor becomes available again, assuming it is taking to long to process a request? The amount of time your app takes to process a request is totally up to your app. There's nothing Tomcat can do if you decide to execute a database query that takes 5 minutes because you're selecting through a million rows without using an index. The time it takes Tomcat to return the processor to the pool when a request is completed is as small as we can make it (a few milliseconds on a typical configuration). There's no motivation (or code in Tomcat) for keeping a processor unavailable any longer than it has to be. Besides processors, there might be contention for available threads and/or TCP/IP socket resources in your operating system. There are also VERY wide variations in the maximum number of threads a particular OS+JVM combination can support -- the Volano Report http://www.volano.com makes interesting reading in this regard. Any way to check how many processors are active/in use? There's nothing built in, but it would be straightforward to create a Valve that was stuck on the Engine (so it could see all requests to all webapps). Because this Valve will be executed by multiple threads at the same time, maintaining a simple counter that is incremented at the start of a request and decremented at the end would give you an active count. For the requests being processed by a particular webapp, you could do the same thing (and portably to boot) using a Filter mapped to /*. Jeff Craig -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Processor Availability
Thank you very much! - Original Message - From: Randall R Schulz [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Friday, August 30, 2002 6:02 PM Subject: Re: Processor Availability Rodrigo, CTRL-D doesn't send a signal on any OS I've ever worked with, including Windows. Use CTRL-BREAK. You'll get a nice, verbose thread dump. Make sure you've configured your console window for at least a few hundred lines of scroll-back, because the dump comes very fast. On my system with a newly launched Tomcat 4.0.4-LE, there were almost 240 lines after the CTRL-BREAK. Randall Schulz Mountain View, CA USA At 05:20 2002-08-30, you wrote: Sending a QUIT signal works in Unix (Linux and Solaris), but Ctrl-D doesn't do anything in Windows 2000. Anybody knows something about it? Jeff, what kind of processing are you doing in your JSP/servlets? You could be experiencing deadlock problems. It's just an idea :-) Best regards, Rodrigo Ruiz -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: shared classes for engine, service or global context
I am using Tomcat 3.3.1, and facing the same problem. We are developing a custom Realm, and need to access some classes from within a management web-app. If I put my jar in lib/container, the realm starts with no error. If I put it in /lib/common, it does not. Is there any way in Tomcat 3.3.1 to achieve this? PS: You can check this behaviour simply moving tomcat_modules.jar from lib/container to any other lib directory. Thanks in advance, Rodrigo Ruiz -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Client Certificates on Tomcat 3.3.1
Ok, a step forward After some changes in my certificates, I have a client that successfully sends its certificates to the server. From the browser, it doesn't connect at all (no certificate pop ups, and no connection stablished) Explorer requests now raise the following exception in Tomcat: Thread-17, WRITE: SSL v3.0 Handshake, length = 2825 Thread-17, READ: SSL v3.0 Alert, length = 2 Thread-17, RECV SSLv3 ALERT: warning, no_certificate SSL -- handshake alert: no_certificate Thread-17, SEND SSL v3.0 ALERT: fatal, description = handshake_failure Thread-17, WRITE: SSL v3.0 Alert, length = 2 PoolTcpEndpoint: Handshake failed javax.net.ssl.SSLException: javax.net.ssl.SSLProtocolException: handshake alert: no_certificate at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275) at com.sun.net.ssl.internal.ssl.AppOutputStream.write(DashoA6275) at java.io.OutputStream.write(OutputStream.java:61) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(DashoA6275) ... But my java client does the handshake correctly. I am using the same certificates in both cases, any idea about the problem with Explorer? The java client is working with BASIC authorization level. It still doesn't work with CLIENT-CERT. - Original Message - From: Tathagat (London) [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Tuesday, August 20, 2002 6:02 PM Subject: RE: Client Certificates on Tomcat 3.3.1 1 thing is still unclear to me. DO YOU SEE THE CERTIFICATE POP UP WHEN YOU CONNECT TO THE SERVER? If not you have to include your client side certificate store into your $JAVA_HOME\jre\lib\security\cacerts keystore. using keytool -import with -trustcacerts option I use. keytool -import -alias drkw_root -file InvestmentBankCA_root.pem -trustcacerts -keystore cacerts -v Tell me if you see the certificates already pop up when you connect to the website, then I will try to find if anything else is going wrong. cheers Tathagat -Original Message- From: Rodrigo Ruiz [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 20, 2002 17:54 To: Tomcat Users List Subject: Re: Client Certificates on Tomcat 3.3.1 Tathagat, at this moment I am generating my own self-signed server and client certificates :-P I have no .pem files, as I don't rely on any third provider. The keystore I am using in my server has the following entries: thawtepersonalfreemailca, Fri Feb 12 21:12:16 CET 1999, trustedCertEntry, thawtepersonalbasicca, Fri Feb 12 21:11:01 CET 1999, trustedCertEntry, verisignclass3ca, Mon Jun 29 19:05:51 CEST 1998, trustedCertEntry, thawtepersonalpremiumca, Fri Feb 12 21:13:21 CET 1999, trustedCertEntry, thawteserverca, Fri Feb 12 21:14:33 CET 1999, trustedCertEntry, verisignclass4ca, Mon Jun 29 19:06:57 CEST 1998, trustedCertEntry, verisignserverca, Mon Jun 29 19:07:34 CEST 1998, trustedCertEntry, verisignclass1ca, Mon Jun 29 19:06:17 CEST 1998, trustedCertEntry, thawtepremiumserverca, Fri Feb 12 21:15:26 CET 1999, trustedCertEntry, verisignclass2ca, Mon Jun 29 19:06:39 CEST 1998, trustedCertEntry, tomcat-sv, Tue Aug 20 16:39:06 CEST 2002, keyEntry, The last entry is my own server certificate. From this point, using the KeyMan tool, I do this: 1. Create an empty keystore 2. Import the server certificate as a CA certificate into this new keystore 3. Create a new key pair 4. Create a .csr file 5. From the server keystore, create a certificate for this .csr (it creates a .cer file with a X509 certificate chain) 6. Create a PKCS #12 token 7. Import the .cer created at point 5 8. Save the token (as a .pfx file) Once I have this file, I import the server certificate in the trusted CA provider store (I can do this directly from the pop-up window that shows the browser on server connection). Finally, I import the .pfx file into Explorer. Is it enough importing the server certificate, or do I have to generate a .pem file for my server certificate? If so, which tool should I have to use? Now it seems to connect to the server, but it still receives an HTTP 401 error message. My web-app has activated the CLIENT-CERT authentication scheme. If I relax this to BASIC, all seems to work fine. The browser shows the user/password dialog box, and I am in :-) Could it be a problem related to the realm? How do you specified the list of valid users? In CLIENT-CERT mode, you don't have user/password info. Thanks a lot! - Original Message - From: Tathagat (London) [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Tuesday, August 20, 2002 5:14 PM Subject: RE: Client Certificates on Tomcat 3.3.1 ok, what you have to do is put the certificate provider into your java's security file. keytool -import blah blah (options) what you have
CLIENT-CERT Authorization in Tomcat 3.3.1
I want to configure a webapp to use CLIENT-CERT authorization. How do I specify which client certificates are allowed to access my webapp? Thanks in advance -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Client Certificates on Tomcat 3.3.1
Hi all, I'm trying to setup a secure connection between Tomcat 3.3.1 and a java soap client. My soap service simply prints out some request data, and also the content of request.getAttribute(javax.servlet.request.X509Certificate) Following some example code I found on Internet (I'm not sure this code should function) I have followed the instructions in the xml.apache.org FAQ, and generated all certificates with keytool. Firstly, I configured tomcat with clientAuth set to false, and used a basic authentication scheme in my web-app. It worked fine. When connecting through my client, the service prints the next info: Authorization: BASIC Remote User: tomcat Secured: true Principal: tomcat No client certificate is available If I set clientAuth to true, it still works, but it keeps showing the No client certificate available message. The big problem comes when I configure my web-app to use CLIENT-CERT authorization scheme. It simply returns a 401 error code. Any one can help me, please?? Thanks in advance, Rodrigo Ruiz Aguayo PS: Following is the bat file I'm using to generate the keystores: del server.keystore del client.keystore copy %JAVA_HOME%\jre\lib\security\cacerts .\server.keystore copy %JAVA_HOME%\jre\lib\security\cacerts .\client.keystore REM Change default passwords keytool -storepasswd -keystore server.keystore -storepass changeit -new 123456 keytool -storepasswd -keystore client.keystore -storepass changeit -new 123456 REM Create server.keystore keytool -genkey -alias tomcat-sv -dname CN=neyade,OU=InnerGrid,O=GridSystems,L=Palma,S=Baleares,C=ES -keyalg RSA -keypass 123456 -storepass 123456 -keystore server.keystore keytool -export -alias tomcat-sv -storepass 123456 -file server.cer -keystore server.keystore REM Import server certificate as a trusted CA in the client keystore keytool -import -v -trustcacerts -alias tomcat -file server.cer -keystore client.keystore -keypass 123456 -storepass 123456 REM Create client keystore keytool -genkey -alias rruiz -dname CN=rruiz,OU=InnerGrid,O=GridSystems,L=Palma,S=Baleares,C=ES -keyalg RSA -keypass 123456 -storepass 123456 -keystore client.keystore keytool -export -alias rruiz -storepass 123456 -file rruiz.cer -keystore client.keystore keytool -import -v -trustcacerts -alias tomcat -file rruiz.cer -keystore server.keystore -keypass 123456 -storepass 123456 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Client Certificates on Tomcat 3.3.1
- Original Message - From: Tathagat (London) [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Tuesday, August 20, 2002 3:22 PM Subject: RE: Client Certificates on Tomcat 3.3.1 okay, I have faced so many problems on this.. and finally could do it! Please answer the following questions. First question: The certificates that you are using on your machine (as client), where do you get them from? I create them with KeyMan from IBM. I have tried to create a X509 Chain, signed with my server key, and also a .PFX file with the same characteristics. None seemed to work. In fact, when I import the certificates into Explorer, it places them into the Medium CA Providers Tab, and not in the Personal repository. Is it ok? Second: When you connect the server (https://localhost:8443) or whatever), does your certificate pops up? The browser only pops up the server certificate, not the client one. It looks like it does not send my client certificate at all. cheers Tathagat -Original Message- From: Rodrigo Ruiz [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 20, 2002 11:42 To: [EMAIL PROTECTED] Subject: Client Certificates on Tomcat 3.3.1 Hi all, I'm trying to setup a secure connection between Tomcat 3.3.1 and a java soap client. My soap service simply prints out some request data, and also the content of request.getAttribute(javax.servlet.request.X509Certificate) Following some example code I found on Internet (I'm not sure this code should function) I have followed the instructions in the xml.apache.org FAQ, and generated all certificates with keytool. Firstly, I configured tomcat with clientAuth set to false, and used a basic authentication scheme in my web-app. It worked fine. When connecting through my client, the service prints the next info: Authorization: BASIC Remote User: tomcat Secured: true Principal: tomcat No client certificate is available If I set clientAuth to true, it still works, but it keeps showing the No client certificate available message. The big problem comes when I configure my web-app to use CLIENT-CERT authorization scheme. It simply returns a 401 error code. Any one can help me, please?? Thanks in advance, Rodrigo Ruiz Aguayo PS: Following is the bat file I'm using to generate the keystores: del server.keystore del client.keystore copy %JAVA_HOME%\jre\lib\security\cacerts .\server.keystore copy %JAVA_HOME%\jre\lib\security\cacerts .\client.keystore REM Change default passwords keytool -storepasswd -keystore server.keystore -storepass changeit -new 123456 keytool -storepasswd -keystore client.keystore -storepass changeit -new 123456 REM Create server.keystore keytool -genkey -alias tomcat-sv -dname CN=neyade,OU=InnerGrid,O=GridSystems,L=Palma,S=Baleares,C=ES -keyalg RSA -keypass 123456 -storepass 123456 -keystore server.keystore keytool -export -alias tomcat-sv -storepass 123456 -file server.cer -keystore server.keystore REM Import server certificate as a trusted CA in the client keystore keytool -import -v -trustcacerts -alias tomcat -file server.cer -keystore client.keystore -keypass 123456 -storepass 123456 REM Create client keystore keytool -genkey -alias rruiz -dname CN=rruiz,OU=InnerGrid,O=GridSystems,L=Palma,S=Baleares,C=ES -keyalg RSA -keypass 123456 -storepass 123456 -keystore client.keystore keytool -export -alias rruiz -storepass 123456 -file rruiz.cer -keystore client.keystore keytool -import -v -trustcacerts -alias tomcat -file rruiz.cer -keystore server.keystore -keypass 123456 -storepass 123456 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- If you have received this e-mail in error or wish to read our e-mail disclaimer statement and monitoring policy, please refer to http://www.drkw.com/disc/email/ or contact the sender. -- -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Client Certificates on Tomcat 3.3.1
Tathagat, at this moment I am generating my own self-signed server and client certificates :-P I have no .pem files, as I don't rely on any third provider. The keystore I am using in my server has the following entries: thawtepersonalfreemailca, Fri Feb 12 21:12:16 CET 1999, trustedCertEntry, thawtepersonalbasicca, Fri Feb 12 21:11:01 CET 1999, trustedCertEntry, verisignclass3ca, Mon Jun 29 19:05:51 CEST 1998, trustedCertEntry, thawtepersonalpremiumca, Fri Feb 12 21:13:21 CET 1999, trustedCertEntry, thawteserverca, Fri Feb 12 21:14:33 CET 1999, trustedCertEntry, verisignclass4ca, Mon Jun 29 19:06:57 CEST 1998, trustedCertEntry, verisignserverca, Mon Jun 29 19:07:34 CEST 1998, trustedCertEntry, verisignclass1ca, Mon Jun 29 19:06:17 CEST 1998, trustedCertEntry, thawtepremiumserverca, Fri Feb 12 21:15:26 CET 1999, trustedCertEntry, verisignclass2ca, Mon Jun 29 19:06:39 CEST 1998, trustedCertEntry, tomcat-sv, Tue Aug 20 16:39:06 CEST 2002, keyEntry, The last entry is my own server certificate. From this point, using the KeyMan tool, I do this: 1. Create an empty keystore 2. Import the server certificate as a CA certificate into this new keystore 3. Create a new key pair 4. Create a .csr file 5. From the server keystore, create a certificate for this .csr (it creates a .cer file with a X509 certificate chain) 6. Create a PKCS #12 token 7. Import the .cer created at point 5 8. Save the token (as a .pfx file) Once I have this file, I import the server certificate in the trusted CA provider store (I can do this directly from the pop-up window that shows the browser on server connection). Finally, I import the .pfx file into Explorer. Is it enough importing the server certificate, or do I have to generate a .pem file for my server certificate? If so, which tool should I have to use? Now it seems to connect to the server, but it still receives an HTTP 401 error message. My web-app has activated the CLIENT-CERT authentication scheme. If I relax this to BASIC, all seems to work fine. The browser shows the user/password dialog box, and I am in :-) Could it be a problem related to the realm? How do you specified the list of valid users? In CLIENT-CERT mode, you don't have user/password info. Thanks a lot! - Original Message - From: Tathagat (London) [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Tuesday, August 20, 2002 5:14 PM Subject: RE: Client Certificates on Tomcat 3.3.1 ok, what you have to do is put the certificate provider into your java's security file. keytool -import blah blah (options) what you have to import are .PEM files which you get from the certificate providers. Then IE will popup your certificates. Please read keytool documentation on sun site and most things will be clear of my mail. cheers Tathagat -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: How to change the package definition from org.apache.jsp to something else ?
What about using %@ page extends=your.package % at the beginning of your JSP? Related to JBuilder: 1. which version of JBuilder are you using? 2. Are you doing remote debugging, or executing Tomcat from within JBuilder? - Original Message - From: Eric Gilbertson [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Tuesday, August 20, 2002 5:53 PM Subject: Re: How to change the package definition from org.apache.jsp to something else ? Rob, As noted in a previous response, the package name and location of the servlet class files is server specific and not directly controllable by the user. You can work around this by statically compiling your servlets using jspc (use the -p switch to control the package name that is used) and packing the resulting class files into a .war file. This scheme is also server specific, so you want might to consider portability impacts before using it. HTH, Eric Gilbertson At 12:50 AM 8/20/2002 -0400, you wrote: Hi, I have noticed that the default package structure in my servlet source files (compiled from JSPs) is org.apache.jsp. But the .java and .class files are generated in /work/localhost/_/ directory. How can i 1. Force my compiled .java and .class file to go in /work/org/apache/jsp ? or 2. Make .java files to include the right package in .java files (which is /work/locahost/_/)? thanks Rob -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
