Re: Memory issues with large query storage
Saving 600K rows of data in memory for a user is quite extreme. There are several alternatives here. Why save the entire row? Typically I see (and do) the saving of id's instead of the entire row. Then subsequent calls use the id for the lookup. Caching can help the performance of the trip to the database... although thats kinda what your problem is here (not enough memory) Paging (your google previous, next) is typically done using only the records you display and perhaps the *next* and *previous* records and the number span you are viewing. a good example of paging can be found in suns petstore sample application (http://java.sun.com/blueprints/code/) A good look over that should save you lots of pain. regards, Lloyd Andrew Latham wrote: I hope someone can assist here. Basically I have been writing a 3 Tier Web app using Tomcat and trying to adhere to the Struts framework. The application connects to an existing MSSQL database and creates graphs of the data. The way I've built it is I define an entity bean to store a row of returned data from the select query. Each entity bean is appended to a Collection and then made available to the JSP for me to access using . This all works fine, until the Collection.size() reaches numbers like 600,000 and then I hit memory issues. I know there is not much I can do but increase -Xmx and page it or buy more physical memory. The question I have relates to displaying the data. Some of the output I want in a table. Showing all results returned is not good if its more than 100, so I created a "google" type <> to cycle through them, so for this to happen I need the Collection of what can be 100,000 beans to sit in memory as having to go back and get the next 10 from the SQL database is about 2 minutes each time. When the Collection is returned it has a scope of "Request". To make this available to another JSP page (for the next 10) I rescoped the Collection to "session". This introduces a memory problem where it sits around until the session ends and the GC picks it up. Is there a better way to pass the Collection from one JSP to another without re-scoping it or what I can see happen is that if a user runs many queries they all sit around until the session ends utilising memory. I've thought I've setting the Collection to NULL when a new query is run. Is this an acceptable method? Appreciate any advice Thanks Andrew Latham *-- This message and any attachment(s) is intended only for the use of the addressee(s) and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended addressee(s), you are hereby notified that any use, distribution, disclosure or copying of this communication is strictly prohibited. If you have received this communication in error, please erase all copies of the message and its attachment(s) and notify the sender or Kanbay postmaster immediately. Any views expressed in this message are those of the individual sender and not of Kanbay. Although we have taken steps to ensure that this e-mail and any attachment(s) are free from any virus, we advise that in keeping with good computing practice the recipient should ensure they are actually virus free. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: cannot shut down
Looks as if your running on windows. If you are not running as a service you could always CTRL-C the window tomcat is running on. or kill the java process via the task manager. At this point i see that as your only option. Lloyd Michael Ni wrote: heres my dilemma, i dont think my tomcat uses the WEB-INF folder under my webapps/root folder. i think it only reads from common folder. im trying to delete some jars from my common folder but it says its in use. i cant shut down my tomcat, it gives me the error below. anyone got any tips? mike From: "Michael Ni" <[EMAIL PROTECTED]> Reply-To: "Tomcat Users List" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: cannot shut down Date: Thu, 06 Mar 2003 14:52:32 -0800 i get this error when shutting down...does anyone know why? mike C:\Tomcat 4.1\bin>shutdown.bat Using CATALINA_BASE: C:\Tomcat 4.1 Using CATALINA_HOME: C:\Tomcat 4.1 Using CATALINA_TMPDIR: C:\Tomcat 4.1\temp Using JAVA_HOME: c:\j2sdk1.4.1_01 Catalina.stop: java.net.ConnectException: Connection refused: connect java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java: at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) at java.net.Socket.connect(Socket.java:426) at java.net.Socket.connect(Socket.java:376) at java.net.Socket.(Socket.java:291) at java.net.Socket.(Socket.java:119) at org.apache.catalina.startup.Catalina.stop(Catalina.java:581) at org.apache.catalina.startup.Catalina.execute(Catalina.java:402) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccesso java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMetho sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) _ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus - 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: cannot shut down
I usually see this when tomcat is not running or tomat is in a state of not accepting connections. This could happen for variouus reasons. Usually it means that tomcat is either not yet accepting connections (durring startup. perhaps its hanging on some startup servlet) or has ceased to accept them (either during shut down or perhaps a irrecoverable error occured. Michael Ni wrote: i get this error when shutting down...does anyone know why? mike C:\Tomcat 4.1\bin>shutdown.bat Using CATALINA_BASE: C:\Tomcat 4.1 Using CATALINA_HOME: C:\Tomcat 4.1 Using CATALINA_TMPDIR: C:\Tomcat 4.1\temp Using JAVA_HOME: c:\j2sdk1.4.1_01 Catalina.stop: java.net.ConnectException: Connection refused: connect java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java: at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) at java.net.Socket.connect(Socket.java:426) at java.net.Socket.connect(Socket.java:376) at java.net.Socket.(Socket.java:291) at java.net.Socket.(Socket.java:119) at org.apache.catalina.startup.Catalina.stop(Catalina.java:581) at org.apache.catalina.startup.Catalina.execute(Catalina.java:402) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccesso java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMetho sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) _ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail - 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: Mime-Type
jsp typically when compiled and executed responds with html. So I believe you are looking for text/html.. Anthony Smith wrote: I did not know where ask to else this question. Is there a mime-type for a jsp? If so, what is it? - 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: Properties [DONE]
Why wouldnt :
Properties properties = new Properties();
InputStream stream =
context.getResourceAsStream("config.properties");
properties.load(stream);
work?
Why create the new stream object when its there for the taking?
José Moreira wrote:
my code:
Properties properties = new Properties();
String path =
getClass().getClassLoader().getResource("config.properties").getPath().toStr
ing();
try {
FileInputStream file = new FileInputStream(path);
properties.load(file);
} catch (FileNotFoundException f) {
this.status = "nao abriu :"+path;
} catch (IOException e) {
this.status = path+" IOException";
} catch (NullPointerException n) {
this.status = path+" NullPointerException";
}
this.status = properties.getProperty("database");
---<*>--
José Moreira
Técnico de Informática | IT Technician
Vila Nova de Gaia, Portugal
E-Mail: [EMAIL PROTECTED]
MSN: [EMAIL PROTECTED]
ICQ: 136936120
IRC: ethernal (irc.ptnet.org)
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Security for tomact 4.0.3
All,
I have been wrestling with this for a week, to no avail.
I am trying to run tomcat with the security flag on. (Win2K)
I have added the following to my catilina.policy
grant codeBase
"file:C:/dev/jakarta-tomcat-4.0.3/webapps/ROOT/WEB-INF/lib/site.jar" {
permission java.util.PropertyPermission
"javax.xml.parsers.SAXParserFactory", "read";
permission java.util.PropertyPermission "false", "read";
permission java.net.SocketPermission "127.0.0.1:8080",
"connect,resolve";
permission java.io.FilePermission "/home/-", "read,write";
permission java.io.FilePermission
"\\home\\virtual\\site64\\fst\\var\\www\\html\\WEB-INF\\logs", "read,write";
};
I get the following from my dump of the security debugger.
policy: codeBase
file:C:/dev/jakarta-tomcat-4.0.3/webapps/ROOT/WEB-INF/lib/site.jar
policy:
policy: (java.util.PropertyPermission
javax.xml.parsers.SAXParserFactory read)
policy: (java.util.PropertyPermission false read)
policy: (java.net.SocketPermission 127.0.0.1:8080 connect,resolve)
policy: (java.io.FilePermission /home/- read,write)
policy: (java.io.FilePermission
\home\virtual\site64\fst\var\www\html\WEB-INF\logs read,write)
policy:
access: access denied (java.io.FilePermission
\home\virtual\site64\fst\var\www\html\WEB-INF\logs read)
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:997)
at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:261)
at
java.security.AccessController.checkPermission(AccessController.java:399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkRead(SecurityManager.java:890)
at java.io.File.exists(File.java:546)
at java.io.File.mkdirs(File.java:978)
at site.appobj.LogThread.(LogThread.java:30)
at site.appobj.Logger.startup(Logger.java:52)
at site.appobj.Logger.init(Logger.java:40)
at site.appobj.Logger.init(Logger.java:23)
at site.listener.ContextListener.startLogger(ContextListener.java:92)
at
site.listener.ContextListener.contextInitialized(ContextListener.java:50)
at
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3175)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:3378)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:614)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
at org.apache.catalina.core.StandardService.start(StandardService.java:388)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
access: domain that failed ProtectionDomain
(jar:file:C:/dev/jakarta-tomcat-4.0.3/webapps/ROOT/WEB-INF/lib/site.jar!/site/appobj/LogThread.class
)
[EMAIL PROTECTED] (
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\site.jar read)
(java.io.FilePermission C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\- read)
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\- read)
(java.net.SocketPermission localhost:1024- listen,resolve)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/classes/*)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/lib/*)
(org.apache.naming.JndiPermission jndi:/localhost/*)
(java.lang.RuntimePermission stopThread)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission line.separator read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission java.vm.specification.vendor read)
)
any idea why tomcat isnt applying these permissions?
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For addi
Re: catalina.policy grant codebase not working
I can see it being added in the log file as well...
log file.:
policy:
policy: Adding policy entry:
policy: signedBy null
policy: codeBase file:../webapps/ROOT/WEB-INF/lib/site.jar!/-
policy:
policy: (java.security.AllPermission )
policy:
Lloyd A Duke wrote:
Greetings,
I am running Tomcat 4.03 on Win2k
I have recently started to run it with the -security flag.
I have added the following to my catalina.policy file to test.
grant codeBase
"file:${catalina.home}/webapps/ROOT/WEB-INF/lib/site.jar!/-" {
permission java.security.AllPermission;
};
I have turned on the debugger.
It seems that my grant codeBase entry is not working.
from the debugger
...
access: access denied (java.net.SocketPermission localhost resolve)
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:997)
at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:261)
at
java.security.AccessController.checkPermission(AccessController.java:399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1042)
at java.net.InetAddress.getAllByName0(InetAddress.java:559)
at java.net.InetAddress.getAllByName0(InetAddress.java:540)
at java.net.InetAddress.getByName(InetAddress.java:449)
at sun.net.www.http.HttpClient.(HttpClient.java:261)
at sun.net.www.http.HttpClient.(HttpClient.java:281)
at sun.net.www.http.HttpClient.New(HttpClient.java:293)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:404)
at site.util.AppCaller.run(AppCaller.java:34)
at java.lang.Thread.run(Thread.java:484)
access: domain that failed ProtectionDomain
(jar:file:C:/dev/jakarta-tomcat-4.0.3/webapps/ROOT/WEB-INF/lib/site.jar!/site/util/AppCaller.class
)
java.security.Permissions@xx (
(java.util.PropertyPermission javax.sql.* read)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission line.separator read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission java.naming.* read)
(java.util.PropertyPermission java.home read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission jaxp.debug read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission java.vm.specification.vendor read)
(java.lang.RuntimePermission accessClassInPackage.sun.beans.*)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/classes/*)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/lib/*)
(org.apache.naming.JndiPermission jndi:/localhost/*)
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\site.jar read)
(java.io.FilePermission C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\- read)
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\- read)
)
UGH...
I have tried explicitly adding Permissions. tried adding the specific
class to the grant statement e.g.
file:${catalina.home}/webapps/ROOT/WEB-INF/lib/site.jar!/site/util/AppCaller.class
declaring the jar file without the ! appended to it..
giving only teh webapps dir in the grant statement...
nothing seems to work...
any help??
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catalina.policy grant codebase not working
Greetings,
I am running Tomcat 4.03 on Win2k
I have recently started to run it with the -security flag.
I have added the following to my catalina.policy file to test.
grant codeBase
"file:${catalina.home}/webapps/ROOT/WEB-INF/lib/site.jar!/-" {
permission java.security.AllPermission;
};
I have turned on the debugger.
It seems that my grant codeBase entry is not working.
from the debugger
...
access: access denied (java.net.SocketPermission localhost resolve)
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:997)
at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:261)
at
java.security.AccessController.checkPermission(AccessController.java:399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1042)
at java.net.InetAddress.getAllByName0(InetAddress.java:559)
at java.net.InetAddress.getAllByName0(InetAddress.java:540)
at java.net.InetAddress.getByName(InetAddress.java:449)
at sun.net.www.http.HttpClient.(HttpClient.java:261)
at sun.net.www.http.HttpClient.(HttpClient.java:281)
at sun.net.www.http.HttpClient.New(HttpClient.java:293)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:404)
at site.util.AppCaller.run(AppCaller.java:34)
at java.lang.Thread.run(Thread.java:484)
access: domain that failed ProtectionDomain
(jar:file:C:/dev/jakarta-tomcat-4.0.3/webapps/ROOT/WEB-INF/lib/site.jar!/site/util/AppCaller.class
)
java.security.Permissions@xx (
(java.util.PropertyPermission javax.sql.* read)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission line.separator read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission java.naming.* read)
(java.util.PropertyPermission java.home read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission jaxp.debug read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission java.vm.specification.vendor read)
(java.lang.RuntimePermission accessClassInPackage.sun.beans.*)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/classes/*)
(org.apache.naming.JndiPermission jndi:/localhost/WEB-INF/lib/*)
(org.apache.naming.JndiPermission jndi:/localhost/*)
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\site.jar read)
(java.io.FilePermission C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\- read)
(java.io.FilePermission
C:\dev\jakarta-tomcat-4.0.3\webapps\ROOT\WEB-INF\lib\- read)
)
UGH...
I have tried explicitly adding Permissions. tried adding the specific
class to the grant statement e.g.
file:${catalina.home}/webapps/ROOT/WEB-INF/lib/site.jar!/site/util/AppCaller.class
declaring the jar file without the ! appended to it..
giving only teh webapps dir in the grant statement...
nothing seems to work...
any help??
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