Re: Web Apps and state machines (was: model 2 servlet mapping question)
Hi, I'll add my 2ec regarding the topic: I agree what it has been said here about each page being modeless and that you have to be careful in case some users get out of the "normal application path" through the back button, shift click... My approach in such systems has been not to trust the user and not to presuppose what will be the next action requested by him. That means that you model the kernel of your flow control as a state machine which might based in something like that: Current State | Request Type | Action to Perform| Next State --- VOID OpenBasket openUserBasket BASKET_OPENED VOID OTHERS showError VOID BASKET_OPENED AddItem addItemToUserBasket BASKET_OPENED BASKET_OPENED RemoveItem removeItemFromUserBasket BASKET_OPENED BASKET_OPENED closeBasketcloseBasketAndCharge CONFIRM_PENDING BASKET_OPENEDOTHERS showError BASKET_OPENED ... Then if the user get's out of sync, he'll get an error because the state machine specifies which are the acceptable inputs on each state and the appropriate answer in each case. After getting 20-30 error pages, they'll stop fooling around with the application and they'll learn how to use it appropriately ;). Just my 2ec (less than 2 cents right now :)) Dan --- Daniel Lopez Janariz ([EMAIL PROTECTED]) Web Services Computer Center Balearic Islands University --- Andrew S Tomlinson wrote: > > Well broadly yes. > Just make sure we do not confuse workflow with transaction. > A *multi-page form* is in my context a workflow; each page in the flow > submits to an action that performs a discrete transaction. As David points > out each page needs to be self-contained. We have both concluded the > critical need for concurrency rules for each discrete transaction. > > Now, to David's point each page is modeless and valid in of itself. > What I want do in my apps is to "thread" them together via the workflow that > I implement as a *state-machine* for want of a better term. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Model 3 Architecture
Hi D.J., We use: .- Framework specific (which is itself container independent) implementation of the model 3 for PL/SQL -> XML -> XSL transformation. I just created another base class for my action classes of the model 2 architecture so it fits pretty well in our already built model 2 framework, thus we can enjoy customizable security and application-wide event handling just as if it were model 2. .- For the JSP -> XML -> XSL, we use a custom JSP1.1 taglib that transforms its whole body. It is also container independent and it is transparent to the model 2 arquitecture so it also fits nicely into our framework. We discarded your first option because it is container specific and we try to avoid this kind of things as long as possible. Cocoon is focused in transformation of static XML so we learn from it but we are not using it. We are basically doing what he does but using dynamic XML sources. We hope to learn also from it when we get to the point of caching XSLTProcessors but so far we create them each time. Regards, Dan --- Daniel Lopez Janariz ([EMAIL PROTECTED]) Web Services Computer Center Balearic Islands University --- "D. J. Hagberg" wrote: > > This is certainly an interesting solution, and I can certainly see the > benefits when generating content for different display devices/browsers. > > The primary question I have for Daniel and the other folks out there > using XSLT is -- what specific tools and techniques are you using for > this transform? Is it: > > - container-specific implementations of servlet chaining? > - jsp 1.1 taglets that transform their whole contained body? > - relying on cutting-edge browsers that actually do XSLT? > - some other mechanism like Cocoon? > > -=- D. J. > > Daniel Lopez wrote: > [ . . . ] > > .- The JSP page formats the result in XML, which is more easily > > understood by designers, can be used as documentation, and for which > > fake document sets are easily generated. The JSP can also determine "on > > the fly" which XSLT sheet will be used to generate the UI. > > .- The XSLT sheet transforms the XML into HTML, WML, PDF and result is > > sent to the client. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP Thread safety
Well, it all comes down to that little part in your mail >(if you, um, know what you're doing.) > And apparently, since JSP is rather new, and a lot of people are developing in JSP without ever having done any servlet programming, I think my advice of using <% %> does make sense. Geert 'Darling' Van Damme === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
JTree in JSP
hi all, i post again the question, hoping that someone can reply now. how can i do a tree structure in JSP, just like JTree?? my situation is like this: i have a list of usergroup when i click on one usergroup, i want to see, under the usergroup name, the list of all users...(represented by checkboxes) then assume that i check one of those checkboxes after that, i click on another usergroup, and i want to see the page with the list of the users of the previous usergroup and the users of the just selected usergroup.. how can i do that?? the list of usergroup should be dynamic, and loaded every time the page is requested..for consistency puposes.. hope to have explained well my problem anyone can help me?? thanx in advance and regards marco PS i don't want to use applet === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP Thread safety
On Tue, 9 May 2000, Geert Van Damme wrote: > Well, it all comes down to that little part in your mail > > >(if you, um, know what you're doing.) > > > > And apparently, since JSP is rather new, and a lot of people are developing > in JSP without ever having done any servlet programming, I think my advice > of using <% %> does make sense. No doubt. But the whole point of JSP is to provide a servlet that doesn't look like a servlet; it's a fully-functional gateway technology, if you will. Advocating willful ignorance of a part of it doesn't help anyone, and saying that you should avoid a tool simply because it can be used incorrectly isn't as useful as suggesting ways the tool can be used properly (i.e., "using static declarations in <%! %> needs to be made thread-safe, so until you're aware of what this means, you may want to use the page attribute that indicates single-threadedness if you seem to be having problems with data from other requests.") It's longer to specify the correct solution (which, of course, I still didn't do, not really) but I'd say with a nascent technology, do it correctly - advocating a lesser form of the technology doesn't help anyone except those who haven't invested the week that JSP mastery requires. --- Joseph B. Ottinger [EMAIL PROTECTED] http://cupid.suninternet.com/~joeo HOMES.COM Developer === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: *** Oracle hates JDBC Servlets?
Hi-u-all! I got the answer to my trouble with Servlets that connect to *EVIL* Oracle8i databases. The question why they don't wanna work using Oracle JDBC drivers but they do with JDBC-ODBC driver is the following: I am using Resin Web Server, which runs over JDK 1.2 environment. My version of Oracle8i is 8.1.5.0.0 which internally works on JRE 1.1.7 (JDK 1.1 compatible). When I try to connect the servlet to the database (of course it's done by means of my web server), I have two choices: 1. Use jdbc\lib\classes111.zip . This zip file contains the db classes that come with Oracle8i. These classes are JDK 1.1 compliant. So the system is able to load the driver into memory (a Class.forName () opperation) but the server can't handle jdbc requests. 2. Use classes12.zip . This is the zip file containing the db classes to work with JDK 1.2 . So the system loads the driver, connect succesfully to the database, but when it asks to the database for a result, the database can't handle jdbc requests. SOLUTIONS: ~~ 1. Use JDBC-ODBC drivers. It's platform-dependent (works only over Windows) and is coming obsolete, but ***IT WORKS*** 2. Use another web server that is JDK 1.1 compliant (e.g. Apache Web Server + Apache JServ works over JDK 1.1.8) and use classes111.zip . Apache is powerful and the most used web server, but setup is awful, because it uses its own directives. 3. Download Oracle8i 8.1.6, which is JDK 1.2 compliant, and use classes12.zip I hope it can be useful for somebody. See-u-soon. Consigue tu dirección de email gratis y permanente en http://WWW.LETTERA.NET Ýo unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name
Re: Model 3 Architecture
Hi Stephen, Comments intermixed :) Stephen Baishya wrote: > > Dan, > > I agree with your issues regarding JSP. Whilst JSP favours the UI designer > rather than the developer to some extent, the UI designer still needs some > knowledge of the Java language, an issue which I think is better solved by > using XML. OK, both JSP and XSL require use of some simple scripting > constructs, but with XSL you can achieve COMPLETE separation from your Java > code - no beans, nothing. And don't forget that XML and XSL are language independent with all the implied benefits. > Although Sun's "Application Programming Model" > advocates JSP over servlets I still don't buy it as much more than an > "anything you can do we can do too" to Microsoft's ASP. I agree that JSP is not a one-size-fits-all solution and that it might have been done better in some aspects. But I still think it has its place and, as any other tool, you just have to learn when/how to use it appropriately. > Your suggestion of > using XML/XSL validates the work I have been doing, however I have jumped > straight to the suggestion you make in your "disadvantages" section, and my > plan is to generate XML directly within any services which my servlets > would make use of. We are still going to use JSP to generate XML from Java because it fits pretty well into out previous model 2 architecture and because getting from a static XML document to a dynamic one is easier with a JSP page than within a servlet. And then you also have your "XML formatting" independent of your action classes, thus having a cleaner separation which means ease of maintenance, reusability... > Of course, there is a performance hit involved in performing the XSL > transformation, so if possible I would prefer not to add in the > servlet-to-JSP request dispatching process. Certainly, I expext to see > significant improvements in XML/XSL processing performance as newer > processers and parsers are released, and long term some of this burden > should be moved onto the client anyway (at least for web browser clients). We also try not to add the extra layer, hence the PLSQL approach, but as long as the architecture remains easy to develop and mantain. As long as no xml-java mapping is there, JSP seems to be a good option. We still have to test thoroughly whether it's worthy or not, but we think generating XML directly from the servlets is, right now, too messy. And we don't consider, right now, moving the XSL parsing to the client. Why send both documents XML & XSLT to the client if you already now in the server what you have to do with them? You would be wasting network bandwidth and relying in browsers compatibility and those are not good things. > IMHO, going the XML route produces a more versatile, more architecturally > sound web application than the Model 2 approach of throwing unnecessary > layers into the pot just for the sake of it. The fact that an XML-enabled > servlet can return an untransformed XML document means that you could then > "front-end" your data services with an XML-over-HTTP servlet (SOAP anyone?), > and open them up to a very wide range of clients if desired. This will be > even more versatile when we have a Java-to-XML data binding. If we had such a binding, I agree we might try to take advantage of it but, IMHO, using JSP doesn't mean adding such a thick layer. It's just a servlet anyway and we use for business logic vs results formatting independence. I agree too many layers might spoil your cake, so we try to use the ones we find worthy. But you might also use WebMacro(I haven't tested, just a guess) or other similar approaches for the generation of the XML. > Unfortunately, I suspect that because XML/XSL is at a slight disadvantage > to > JSP in the maturity stakes, and because Sun themselves advocate JSP, Model 2 > will take over. I take some satisfaction from the fact that I am not alone > in my concerns regarding Model 2 - all of the Technical Architects and > developers with whom I have discussed it are uncomfortable with the idea. I would say that XML/XSL is in a slight disadvantage regarding the maturity of the tools, not the technology itself. Standard taglibs are not there yet and having a tool that can do everything, even allow people to create the ugliest JSP pages with more Java than HTML, doesn't mean, for me, being mature. If all these efforts of creating drag & drop JSP(HTML) tools were directed towards developing visual XML&XSL tools, which are language/container/taglib independent we would get, IMHO, much better results. > But I also have concerns that because of this people might choose to go > with > JSP alone and start using the JSP as both a controller and a view, packing > the code that would be in the servlet in a Model 2 design into the JSP and > thus losing the separation of the presentation code. The result - a > situation no better than that which we have with servlets. Agreed! If I had to come up with a set of taglib
Re: Model 3 Architecture
Hi Mike, Mike Van Riper wrote: > > Daniel, > > At my company, we are working on a similar process to yours. Our > non-programmers will be creating simple XML documents. We then run a > design-time build process to transform the XML documents into JSP pages. We > are building common transformations for things like business object > listings. The same XML DTD for a business object listing can be used to > define the layout for the listings of different business objects in separate > XML document instances. The beauty of this approach is that we get a > consistent look to all our listings and can change the look at anytime for > all listings by changing the XSL transformations that produce the JSP files > from the XML document instances. Yeah! We follow a similar approach but with dynamic transformations. It its very appropriate when you need different look and feels depending on some circumstances (for example, in web hosting business). > Another good aspect of this approach is that we don't have a runtime > performance hit doing an XSL transformation. Of course, there are still > things that have to be decided dynamically at runtime. For that information, > we encapsulate the Java logic in beans. Eummm? I might have not got it right. You are performing the transformations at desing time and then adding dynamic info with Java Beans? How? Do you generate JSP pages from XML, instead of generating HTML? We don't generate the output formats (XSLT sheet) at runtime, we just apply it to the dynamically generated XML. Even though it would be possible too, but fortunately we don't need such a complex transformation process. > The obvious disadvantage of our > approach versus yours is that we can't do the "on the fly" generation of > different output formats. However, we can still support different output > formats by generating the multiple formats in our design-time build process. > I will let you know in a few months how it pans out because we are just now > going from investigation phase into design/development of this approach in a > big way. We hope to have the first application ready in 2 weeks. But we are generating the XML directly from PLSQL which speeds up enormously the database access coding. Good luck with your approach. Regards, Dan --- Daniel Lopez Janariz ([EMAIL PROTECTED]) Web Services Computer Center Balearic Islands University --- > > FYI, > > Mike Van Riper > [EMAIL PROTECTED] > > > -Original Message- > > From: Daniel Lopez [mailto:[EMAIL PROTECTED]] > > Sent: Monday, May 08, 2000 12:06 AM > > To: [EMAIL PROTECTED] > > Subject: Model 3 Architecture > > > > > > Hi, > > > > Some people asked my about this "Model 3" I talked about in my last > > posting about "model 2 servlet mapping question" so I thought I should > > explain what I meant, not to confuse people. First, before > > people starts > > asking about specifications and documentation, it's by no means an > > official name and AFAIK it hasn't been mentioned anywhere. > > It's just an > > idea several people in this list seem to be using and I just have to > > give it a short name so... my apologies if this drrove someone to > > confusion. Explanation follows: > > > > After playing a while with model 2, I have to admit it's far > > for perfect > > and one of the places where it doesn't convince me is in the > > part where > > web designers (non programmers) have to deal with JSP code to generate > > the UI. Sure that taglibs will help and sure that tools will > > come up to > > help drag&drop development but it still doesn't convince me so I > > thought, as many others, of using XML&XSL as an extra layer(hence the > > name Model 3) between the generation of the data and the > > construction of > > the UI. The architecture goes like that: > > .- Controller servlet gets a request and determines the appropriate > > Action to be executed. > > .- The Action performs the business logic using the data > > sources (Files, > > DB) and forwards control to the appropriate JSP to "format" > > the result. > > .- The JSP page formats the result in XML, which is more easily > > understood by designers, can be used as documentation, and for which > > fake document sets are easily generated. The JSP can also > > determine "on > > the fly" which XSLT sheet will be used to generate the UI. > > .- The XSLT sheet transforms the XML into HTML, WML, PDF and result is > > sent to the client. > > > > Advantages: > > .- Programming part and design are completely separated. You > > just agree, > > at the beginning if possible, the format of the XML documents and then > > the programmer have to care on how to generate them > > dynamically and the > > designers on how to generate the UI from them. > > .- IMHO, there will be more tools to handle XML&XSL -> HTML than > > drag&drop JSP to HTML. XML, XSL are already standards, > > taglibs are not, > > and it will be easier to
Model 2 & 3 Architecture
Hi-u-all. I think I've got a black hole in my acknoledgement, but... could anyone explain me what architecture 2 & 3 are exactly and where can I get further information? Thanxalot. Consigue tu dirección de email gratis y permanente en http://WWW.LETTERA.NET Ýo unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name
!!Tomcat configuration!!
Hi all, I am new to using Tomcat. Need urgent help in Tomcat configuration. We are using Tomcat3.1 on Apache 1.3.11 . Our application is quite huge so, we require to maintain our own seperate directory structure for Servlets and Jsp's. So the requirement is to create alias names and map it to these directories(seperate for Servlets and Jsp's). Thanks in advance Regards Neelesh = My home page http://www.geocities.com/siliconvalley/grid/ __ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Model 2 & 3 Architecture
Hi-u-all. I think I've got a black hole in my acknoledgement, but... could anyone explain me what model 2 & 3 architectures are exactly and where can I get further information? Thanxalot. Consigue tu dirección de email gratis y permanente en http://WWW.LETTERA.NET Ýo unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name
Java Problem
Hi... i am trying to run a jsp application on Apache- Tomcat...Server.. But the moment i accesss data from database... It starts giving java.exe Application Error. (Like some problem in referenced memoryMemory couldn't be read...) If anybody have any idea..Please let me know.. Thanks in advance.. Ritu === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: !!Tomcat configuration!!
The mappingsdetails for tomcat server are in server.xml that is in the conf directory of Tomcat! You'll have to do a bit of reading if you have to configure such a big application. The Users Guide will show you the necessary details. Vinod Neelesh cc: Sent by: A Subject: !!Tomcat configuration!! mailing list about Java Server Pages specification and reference 05/09/00 01:41 PM Please respond to A mailing list about Java Server Pages specification and reference Hi all, I am new to using Tomcat. Need urgent help in Tomcat configuration. We are using Tomcat3.1 on Apache 1.3.11 . Our application is quite huge so, we require to maintain our own seperate directory structure for Servlets and Jsp's. So the requirement is to create alias names and map it to these directories(seperate for Servlets and Jsp's). Thanks in advance Regards Neelesh = My home page http://www.geocities.com/siliconvalley/grid/ __ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
dinamically built page
Hello to the list,
I have to build a jsp page A depending on the result of a query. I managed
to do it
easily but I have a problem that I cannot solve:
this dinamically built page A calls a page B.
THis page B is supposed to:
. instantiate the proper beans
. pass the data to them
. manage the flow
now, I have to instantiate only the bean that I need, (example, if the page
A has two included pages A.1 and A.3
I have to instantiate the beans a_1 and a_3.
I put an hidden field in the pages A.1 and A.3 that helps me to find out
they are present
and i did like this:
-- JSP page B --
<%
if ( request.getParameter("a.1_present").Equals("Y") {
%>
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Re: JDBC 2.0 probleme in JSP with JWS
Hi
It looks like you are using the JDK 1.1.7-compliant JRE bundled with the Java Web
Server. I think that this JDK is only JDBC1.2 compliant. Try to launch the JWS with
the -nojre option in order to use a Java 2 version which is JDBC2.0 compliant.
Hope this will help.
Christian
"sudhir H.S." a écrit :
> Hi
> Please anyone give solution to my probleme as early as possoible
>
> I am getting error in my JSP page by using JDBC2.0 methods like
> Resultset.first(),Resultset.last();etc how to fix this bug .I am running
> this
> jsp file in Java Web Server 2.0 trial version copy.
>
> and one more probleme for which I need solution urgent is
>
> while(resultset.next())
> {
> statement.executeUpdate(query);
> (I am unable to execute this above line with in the while loop of
> the
> result set using same statement object)
>
> }
>
> awaiting for the solution
> with warm regards
> Sudhir H.S
>
>
> Get free email and a permanent address at http://www.netaddress.com/?N=1
>
> ===
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> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
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> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
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JSP: jsp:forward and UNIX Problems
Hi, I'm using http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Model 2 & 3 Architecture
What i have learned is from listening in this list. Model 2 is setting a single entrance servlet to all your JSPs. that servlet performs common tasks like ID user and secuity tests and then forwards the request to the appropriate JSP/servlet, that JSP/Servlet jenerates the HTML/content that the user sees Model 3 adds another layer of XML. There are two variations: JSP/Servlet generates XML, that XML gows through XSLT (usually in the server) to what the user sees. The other approach (and the one we are testing in our company) is XML that are trasformed through XSLT to JSP pages, those JSP pages generate the HTML/content that the user sees. Both variations added a level of seperation between the UI design and the java code. The 1st variation has the added advantage of being more client responsive. This means you can generate using the same JSP and XML different views according to the user platform: browser, WAP device... The 2nd variation has the advantage of removing the XSLT overhead from the runtime. (and to my opinion it can also provide what the 1st variation provides, but with more jenerated JSPs) lee Lee Elenbaas ViryaNet [EMAIL PROTECTED] -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Germán López Castro Sent: Tuesday, May 09, 2000 11:09 AM To: [EMAIL PROTECTED] Subject: Model 2 & 3 Architecture Hi-u-all. I think I've got a black hole in my acknoledgement, but... could anyone explain me what architecture 2 & 3 are exactly and where can I get further information? Thanxalot. Consigue tu dirección de email gratis y permanente en http://WWW.LETTERA.NET = To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=P http://www.jguru.com/jguru/faq/faqpage.jsp?name=rvlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
JSP Obtain and use NT username in page
Hi all, does anyone know how to obtain an NT user's login name from within a JSP page/environment... If so please spill the beans, TIA, Nigel. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Do I have to Create another instance of Bean if scope is applicat ion
I have a data base Bean DdBean.class I have created a instance of that bean db with scope as application in one of the jsp pasge ( now that as I have given scope as application the id should be visible in another jsp page pls rectify if I am wrong Do I have to Create another instance of DdBean or can I use the same Instance of the bean in other Jsp pages pls giude me on this any comments on this will be highly appreciated regards Bhupesh === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
JRUN with new tags
What is the difference between these tags: and I am using JRUN2.3 with IIS and the latter tag is not working?? === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Basic Doubt
> Hi, > Till now i was using JavaWebServer 2.0 to run my JSP's and Servlets. > But now I have decided to run my JSP's on TOMCAT 3.1. There's a doubt why i need to install and run Apache Web Server when my JSP's and servlets can run well on Tomcat (when run seperately). Nitin === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: *** Oracle hates JDBC Servlets?
Hi, I'm using Oracle 8.1.5 but I downloaded 8.1.6's "classes12.zip" and it works fine for me (Java2+TomCat3.1). As long as Oracle doesn't change their network DB protocol, you can use the latest-and-greatest driver with previous versions of Oracle. It may be a better solution. - Original Message - From: Germán López Castro To: [EMAIL PROTECTED] Sent: Tuesday, May 09, 2000 4:45 AM Subject: Re: *** Oracle hates JDBC Servlets? Hi-u-all! I got the answer to my trouble with Servlets that connect to *EVIL* Oracle8i databases. The question why they don't wanna work using Oracle JDBC drivers but they do with JDBC-ODBC driver is the following: I am using Resin Web Server, which runs over JDK 1.2 environment. My version of Oracle8i is 8.1.5.0.0 which internally works on JRE 1.1.7 (JDK 1.1 compatible). When I try to connect the servlet to the database (of course it's done by means of my web server), I have two choices: 1. Use jdbc\lib\classes111.zip . This zip file contains the db classes that come with Oracle8i. These classes are JDK 1.1 compliant. So the system is able to load the driver into memory (a Class.forName () opperation) but the server can't handle jdbc requests. 2. Use classes12.zip . This is the zip file containing the db classes to work with JDK 1.2 . So the system loads the driver, connect succesfully to the database, but when it asks to the database for a result, the database can't handle jdbc requests. SOLUTIONS: ~~ 1. Use JDBC-ODBC drivers. It's platform-dependent (works only over Windows) and is coming obsolete, but ***IT WORKS*** 2. Use another web server that is JDK 1.1 compliant (e.g. Apache Web Server + Apache JServ works over JDK 1.1.8) and use classes111.zip . Apache is powerful and the most used web server, but setup is awful, because it uses its own directives. 3. Download Oracle8i 8.1.6, which is JDK 1.2 compliant, and use classes12.zip I hope it can be useful for somebody. See-u-soon. Consigue tu direccisn de email gratis y permanente en http://WWW.LETTERA.NET = To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=P http://www.jguru.com/jguru/faq/faqpage.jsp?name=rvlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
FW: Model 3 Architecture
> > I was planning to use this approach for our project.But I couldn't
> convince
> > my manager because of the following problems with this approach ( I am
> sure
> > this will be solved in future)
> > 1.There is no direct way of sending the xml geberated out of jsp( i mean
> u
> > have jsp tags in xml page,and processed as usual) to a XSL engine.
>
> Well, there's not a direct way but if you use, as we do, taglibs then
> it's pretty much as if it were direct. I got this idea from Joe Milora
> (thanks Joe :)) and then my JSP pages might look like that.
>
> Sample Model 3 JSP page
>
> <%@ taglib uri="/leafTag/" prefix="leaf" %>
>
>
> <%
> // Retrieve the Problem set there by the Model 2 action class
> Problem theProblem = (Problem)request.getAttribute("theProblem");
> %>
>Code="<%= theProblem.getCode() %>"
> Title="<%= theProblem.getTitle() %>"
> Description="<%= theProblem.getDescription() %>"
> FAQ_URL="<%= theProblem.getFaqURL() %>"
> >
>
>
> Sample Model 3 JSP page
>
> The tag XSLEval post processes the result of the JSP page(XML) with the
> stylesheed specified and that's all. The stylesheet could also be
> dynamically specified.
>
>
> > 2.Writing XSL is a pain(especially in the context where designers will
> > design the page) and there are no visual tools which will give xsl ,as
> we
> > manipulate layout or something like that.
>
> I agree. I hope time will solve this one but rigth now the best we've
> found is something like Excelon Stylus which lets you perform visual
> development of the XML&XML and then preview the results. What we do is
> perform first a static HTML protoype and the get from there the basis
> for the XSL page. Training your designers will also speeed up this
> process.
>
> > 3.This is one more layer and is it really worth it?
>
> That's what we are trying to see :). From the development point of view,
> I think it does. Let's see what happens with performance. As I mention,
> for some small apps. it might be an overkill but trading manteinability
> and separation of layers for some performance penalty might be worthy
> for many others.
>
> > If you have solutions ,please let me know because it may be my
> ignorance.BTW
> > for jsp-->xml--xsl-->html, I was looking at cocoon.
>
> Cocoon was basically designed for dealing with static XML but you can
> get lots of useful ideas, code and insights from having a look at it. We
> learnt a lot from it and then we are trying to apply it to dynamic XML.
>
> I hope this helps a bit,
> Dan
> ---
> Daniel Lopez Janariz ([EMAIL PROTECTED])
> Web Services
> Computer Center
> Balearic Islands University
> ---
>
>
> > Thanks for any inputs
> > vishu
> >
> > > -Original Message-
> > > From: Daniel Lopez [SMTP:[EMAIL PROTECTED]]
> > > Sent: Monday, May 08, 2000 12:36 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: Model 3 Architecture
> > >
> > > Hi,
> > >
> > > Some people asked my about this "Model 3" I talked about in my last
> > > posting about "model 2 servlet mapping question" so I thought I should
> > > explain what I meant, not to confuse people. First, before people
> starts
> > > asking about specifications and documentation, it's by no means an
> > > official name and AFAIK it hasn't been mentioned anywhere. It's just
> an
> > > idea several people in this list seem to be using and I just have to
> > > give it a short name so... my apologies if this drrove someone to
> > > confusion. Explanation follows:
> > >
> > > After playing a while with model 2, I have to admit it's far for
> perfect
> > > and one of the places where it doesn't convince me is in the part
> where
> > > web designers (non programmers) have to deal with JSP code to generate
> > > the UI. Sure that taglibs will help and sure that tools will come up
> to
> > > help drag&drop development but it still doesn't convince me so I
> > > thought, as many others, of using XML&XSL as an extra layer(hence the
> > > name Model 3) between the generation of the data and the construction
> of
> > > the UI. The architecture goes like that:
> > > .- Controller servlet gets a request and determines the appropriate
> > > Action to be executed.
> > > .- The Action performs the business logic using the data sources
> (Files,
> > > DB) and forwards control to the appropriate JSP to "format" the
> result.
> > > .- The JSP page formats the result in XML, which is more easily
> > > understood by designers, can be used as documentation, and for which
> > > fake document sets are easily generated. The JSP can also determine
> "on
> > > the fly" which XSLT sheet will be used to generate the UI.
> > > .- The XSLT sheet transforms the XML into HTML, WML, PDF and result is
> > > sent to the client.
> > >
> > > Advantages:
> > > .- Programming part and design are completely separated. You just
> agree,
> > > at the beginning if possible, the format of the XML documents a
curious. Getting database info
I'm curious on opions on the fastest/best way to retrieve information from a database using java/jsp. For example say you have various people in a database and have their name, phone number, address, etc. stored in there. Where I work we don't do the database select statements in the jsp pages but in seperate classes out on the server but obviously call them from the jsp pages. I seem to think it's convenient then to create a vector of , for example, "people" objects and then iterate through the vector getting the information I need from each object..getPhoneNumber, getAddress, etc. Is this a good way to get this information from a database? I'm also curious if it's worth an extra step of accessing the database first in order to get a row count that you could then use to give the vector a size? (will this even be worth it for a small database that maybe only has only 1000 rows?) Another method I've used is setting up an array of hashtables and then calling up each hash table and getting phone number, address, etc. that way. Is this better? Thanks so much for any feedback. It would be greatly appreciated. Please feel free to reply to [EMAIL PROTECTED] Rick === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Model 2 & 3 Architecture
It's interesting to hear about the broader adoption of XSL in a "Model 3". I was (and still am) an enthusiastic adopter of XSL but I'd like to add a cautionary note and remark that from my experience: 1. XSL is non-procedural and although it is incredibly easy to use for rudimentary operations it rapidly becomes very complex when anything a bit more sophisticated is required. This applies to both the features of xsl (callable templates, attribute sets and so on) and to the XPath syntax for matching node sets. 2. lack of data-type support means having to bind in java/javascript extension functions e.g. for date formatting 3. building XSL files is a radically different proposition to building HTML (and by extension JSP). This means that you lose the *division of labour* that assigns UI construction to (presumably less *technical*) Web Designers. Again I have found this to be the case for anything other than the most trivial of cases. 4. lack of "self-documenting" features. It's very difficult to come back to an XSL file after a while and figure out what some of it actually does; this raises the bar on expectation for clear comments by the author(s). I have the same "concerns" with SQL as with XPath but at least in SQL I can perform an EXPLAIN PLAN to see how the DBMS engine is interpreting the command. I would really like a similar rationalization capability in XPath. Now, on the positive I have found it great for basic forms and the formatting of static tables but, as indicated above, I rapidly hit a ceiling where the increasing complexity required for incremental functionality was prohibitive. How does this compare to others' experiences? Regards @ === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Whats a ideal development environment
The company I work for scrapped development in CF for JSP because part of their application uses ariba which is written in CF. gautam >From: Kevin McEntee <[EMAIL PROTECTED]> >Reply-To: A mailing list about Java Server Pages specification and > reference <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: Re: Whats a ideal development environment >Date: Mon, 8 May 2000 16:46:53 -0700 > >Thats interesting... > >What led you to scrap ColdFusion in favor of JSP? > >- Kevin > >ColdFusion Analyst wrote: > > > > Hi All, > > Though I have been in the web development arena for a long time (My >primary > > skill lies with other application Software). Could you please help me >with > > thoughts on the Following: > > > > 1. We have resently scrapped development in ColdFusion and substituted >it > > with Ariba Trading Dynamics. the Whole site has to be recoded in JSP. Do >you > > know of an ideal Integrated Development Bench I could set up to run >along > > (with the 2 Ariba servers running on my machine). 1 is Web Logic > > application server there fore I will be using the WebLogic's >implementation > > of JSP. > > > > 2. What is the best source that could get me rolling with JSP soon. I >have > > read a couple of Tutorials, and have worked with java in the past. > > > > Thanks, > > Sincerely, > > gautam > > > > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com > > > > >=== > > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff >JSP-INTEREST". > > Some relevant FAQs on JSP/Servlets can be found at: > > > > http://java.sun.com/products/jsp/faq.html > > http://www.esperanto.org.nz/jsp/jspfaq.html > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > >=== >To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff >JSP-INTEREST". >Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Has anyone ever worked with GEIS?
Does anyone have any experience working with GEIS - division of GE? I have a job opportunity working for a company that will be using GEIS software - both B2C and B2B. I appreciate ANY information you can provide. Thanks! === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Determining Browser encryption
I want to determine whether the browser has 128-bit encryption ? Is there a way to find this out. Any help is appreciated.. Thanks, Shrish Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: A Bean vs a Servlet
Search the archives for messages about the Model 2 design architecture. There have been outstanding discussions of servlets, beans and jsps when discussing this model. http://archives.java.sun.com/archives/jsp-interest.html Donald - Original Message - From: "DAVID BOYLE" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 09, 2000 9:09 AM Subject: A Bean vs a Servlet > > > Hi All, > > Where can I find detailed information about when to use a bean verses > a servlet. I have found general information however I am looking for > more specific details describing the pros and cons of using a bean vs > a servlet from a JSP page. > > Considerations are some of our applications have >80,000 users while > others have < 10. > > Also how can I call a servlet from a JSP page without using a form > action ? > > Thanks in advance > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
A Bean vs a Servlet
Hi All, Where can I find detailed information about when to use a bean verses a servlet. I have found general information however I am looking for more specific details describing the pros and cons of using a bean vs a servlet from a JSP page. Considerations are some of our applications have >80,000 users while others have < 10. Also how can I call a servlet from a JSP page without using a form action ? Thanks in advance === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
call to a procedure in Java
How can we call a procedure ( Not function ) in Java and make use of OUT parameters. Thanks in advance Munish === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
error message
Hi Any body knows what this error means got the driver registered java.sql.SQLException: Message file 'oracle.jdbc.dbaccess.Messages' is missing. java.lang.Throwable(java.lang.String) java.lang.Exception(java.lang.String) java.sql.SQLException(java.lang.String, java.lang.String, int) void oracle.jdbc.dbaccess.DBError.throwSqlException(java.lang.String, java.lang.String, int) void oracle.jdbc.dbaccess.DBError.throwSqlException(int, java.lang.Object) void oracle.jdbc.dbaccess.DBError.throwSqlException(int) long oracle.sql.CHAR.longValue() long oracle.jdbc.driver.ScrollableResultSet.getLong(int) java.lang.Object [][] com.essentus.sdemand.inquiry.SalesOrder.getBusinessUnitList() void com.essentus.sdemand.inquiry.SalesOrder.main(java.lang.String []) error code - 17059 Thanks in advance Munish === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Help
Hi all, I'm looking to get into JSP and would like to know what is the best(free) web server available. I'm currently running 2000 professional and cannot seem to find the mythical IIS5 Ed === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
JSP jsp:forward not working.
Hi all,
anyone know why the following code works:
response.sendRedirect (response.encodeRedirectUrl
("/examples/jsp/mystuff/login.jsp"));
but the following returns : Page not found
...
%>
<%
I do have jsp:forward working in another page but this one just won't play
ball,
TIA,
Nigel.
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http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: How to call the method in another class in the same package?
place the directory in which you are working in the classpath.add the directory name to the classpath in autoexec.bat file. subbu --- Xunming Liu <[EMAIL PROTECTED]> wrote: > Hi: > > here I just ask a simple question. > > I want to put two java files and created classed in > the same package > > e.g. > > fileOne.java can create fileOne.class > > But I want to use the functions of fileOne.java in > fileTwo.java > > when I compile fileTwo.java using > > Javac fileTwo.java > > it show's: "Class fileOne not found" ! > > How I solve this problem? > > Thanks! > > === > To unsubscribe: mailto [EMAIL PROTECTED] with > body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets __ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: jsp:forward and UNIX Problems
With iPlanet, I saw differences between the Linux and SunOS implementations with regard to the tag. As a general rule, though, the forward tag seems to work much better when it is used early on (before the tag) in the JSP. -Original Message- From: Yandle, Nigel [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 09, 2000 4:11 AM To: [EMAIL PROTECTED] Subject: JSP: jsp:forward and UNIX Problems Hi, I'm using http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> ColdFusion has an advantage that it has a low learning curve. I am not as > experienced with JSP to comment on the relative speed of development. Since > CF is easier to learn an application can be developed quickly. When I think about scalable JSPs, I still think of another two tiers of application development (services and database) that has to be written, with JSPs just being the first tier (presentation). So an entire application is generally not written in JSP, but JSP is used to control the dynamic presentation and delivery of information returned by the other two tiers of code that has to be written. In highly scalable web systems, it seems that the need for a huge number of web/presentation systems are often needed to handle all of the connections from web browsers, and the net connections tend to be slow, causing each transaction/tcp socket to be open for "a long time." The other two tiers often run on bigger iron and respond "very quickly" to the presentation tier which then has to stream out the data back to the client over the relatively slow net link (slow compared to the links within the server farm). Does CF combine the "three tiers" (presentation, business logic/services, database) into a single platform? Multi-tier systems tend to handle changes better, such as the inclusion of a desktop app or java applet as a client, or a switch to using phone-based (WAP or DTMF) or PDA-based front ends -- that is, anything that is NOT a web browser, which is just one of the many front ends used by people these days. > In terms of performance ColdFusion has to be parsed to the CFusion Server. If > your application has been coded keeping performance in mind then it should > not be a problem. I have recoded most applications to improve performance > with great results. Jsp has to be compiled into servlets which may be a > performance issue sometimes(correct me if I am wrong). JSPs are compiled once -- unless they are changed. Is that the same for CF, or does CF reparse each time (ala ASP). > ColdFusion servers can be scaled and managed easily. > gautam I've heard this from others. What really big web sites are run on CF? It's unfortunate that this sort of technical information is not more easily obtained for all sorts of technologies. Our industry doesn't like to share information about chosen platforms and architectures, which makes it hard to increase the general knowledge about these things. David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Whats a ideal development environment
> The company I work for scrapped development in CF for JSP because part of > their application uses ariba which is written in CF. > gautam Did you mean ariba is written in JSP? Or was there some reason why your application couldn't be written using the same platform? And why didn't you just interface the CF work with the Ariba work using HTTP rather than being forced to code on the same platform? David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
Had to reply here. We have heard that a certain toy retailer has serious scalability problems with CF and their "scaling" solution was to deploy 300+ servers each with the database loaded into memory. Can anyone verify this rumour? -- > ColdFusion servers can be scaled and managed easily. > gautam I've heard this from others. What really big web sites are run on CF? It's unfortunate that this sort of technical information is not more easily obtained for all sorts of technologies. Our industry doesn't like to share information about chosen platforms and architectures, which makes it hard to increase the general knowledge about these things. -- -- [EMAIL PROTECTED] Associate Systems Engineer HealthStream, The Leader in Online Healthcare Education (615) 301-3151 http://www.healthstream.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Help
Ed, Apache web server is free, but you will need a servlet engine for JSP. You can go to www.javasoft.com and download the Tomcat pilot from the J2EE reference section of online support (menu link on the left side of the page) or you should try to get an evaluation copy of Servlet Exec. Hope this helps. -christine >-Original Message- >From: Ed de Jongh [mailto:[EMAIL PROTECTED]] >Sent: Tuesday, May 09, 2000 10:52 AM >To: [EMAIL PROTECTED] >Subject: Help > > >Hi all, I'm looking to get into JSP and would like to know what is the >best(free) web server available. I'm currently running 2000 >professional and >cannot seem to find the mythical IIS5 > >Ed > >=== > >To unsubscribe: mailto [EMAIL PROTECTED] with body: >"signoff JSP-INTEREST". >Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
JRUN and IPlanet -- JRUN crashes
I am developing an application that uses JSP 1.0 and Servlets. I use JRUN 2.3 Build 157 (the latest) with IPlanet webserver 4.0. I consistently get errors such as: 500 Internal Server Error com.livesoftware.jsp.JSPServlet: java.lang.ArrayIndexOutOfBoundsException: 5173296 and 500 Internal Server Error GuiControllerServlet: java.lang.ArrayIndexOutOfBounds Exception: -1 After I get these errors, I must stop and restart JRUN in order to even run the SnoopServlet. I am running Solaris 2.7 with 256M of memory. Does anyone have any idea of what is going on here? I am extremely frustrated. (I have successfully used JRUN for servlets with Netscape Server 3.51). I am using jdk1.2 and servlet api 2.1 There is absolutely nothing special about what I am doing. I have a GuiControllerServlet that is called upon pressing a submit button. This Servlet uses the RequestDispatcher object to forward the request to a jsp page for display. The problem is intermittent. Thanks very much Lisa === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> ColdFusion has an advantage that it has a low learning curve. I am not as > experienced with JSP to comment on the relative speed of development. > Since CF is easier to learn an application can be developed quickly. When I think about scalable JSPs, I still think of another two tiers of application development (services and database) that has to be written, with JSPs just being the first tier (presentation). So an entire application is generally not written in JSP, but JSP is used to control the dynamic presentation and delivery of information returned by the other two tiers of code that has to be written. In highly scalable web systems, it seems that the need for a huge number of web/presentation systems are often needed to handle all of the connections from web browsers, and the net connections tend to be slow, causing each transaction/tcp socket to be open for "a long time." The other two tiers often run on bigger iron and respond "very quickly" to the presentation tier which then has to stream out the data back to the client over the relatively slow net link (slow compared to the links within the server farm). Does CF combine the "three tiers" (presentation, business logic/services, database) into a single platform? Multi-tier systems tend to handle changes better, such as the inclusion of a desktop app or java applet as a client, or a switch to using phone-based (WAP or DTMF) or PDA-based front ends -- that is, anything that is NOT a web browser, which is just one of the many front ends used by people these days. > In terms of performance ColdFusion has to be parsed to the CFusion Server. If > your application has been coded keeping performance in mind then it should > not be a problem. I have recoded most applications to improve performance > with great results. Jsp has to be compiled into servlets which may be a > performance issue sometimes(correct me if I am wrong). JSPs are compiled once -- unless they are changed. Is that the same for CF, or does CF reparse each time (ala ASP). > ColdFusion servers can be scaled and managed easily. > gautam I've heard this from others. What really big web sites are run on CF? It's unfortunate that this sort of technical information is not more easily obtained for all sorts of technologies. Our industry doesn't like to share information about chosen platforms and architectures, which makes it hard to increase the general knowledge about these things. David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Sessions...
I'm wondering what the best way is to restrict access to some pages. If a user tries to access a page that requires authentication, he should be redirected to a login-page, unless he's all ready logged in. How do I manage this in best way? Thanks Gael === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: jsp:forward and UNIX Problems
> As a general rule, though, the forward tag seems to work much > better when it is used early on (before the tag) in the JSP. Yes, this is true. And it seems to be the same with response.sendRedirect() as well. Very strange indeed. Or does any of you have a good explanation? :: pål :: : : . ___s_p_r_a_y_ Pål Brattberg | [EMAIL PROTECTED] Mob: (+46) 0704 566299 | Tel: (+46) 08 52790122 Här börjar internet | http://www.spray.se > -Original Message- > From: Wasetis, Ken [mailto:[EMAIL PROTECTED]] > Sent: den 9 maj 2000 17:57 > To: [EMAIL PROTECTED] > Subject: Re: jsp:forward and UNIX Problems > > > With iPlanet, I saw differences between the Linux and SunOS > implementations > with regard to the tag. > > > -Original Message- > From: Yandle, Nigel [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, May 09, 2000 4:11 AM > To: [EMAIL PROTECTED] > Subject: JSP: jsp:forward and UNIX Problems > > > Hi, > > I'm using JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > > == > = > To unsubscribe: mailto [EMAIL PROTECTED] with body: > "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
How can I view client HTTP request headers?
Hi, I'm writing a standalone java application to test my JSP-based service and I'd like to view the HTTP request headers that are sent to my web server. Does anyone have any example code / know of a 3rd party product which does this? Thanks, Chris Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> What really big web sites are run on CF? AFAIK, www.toysrus.com runs CF on the NT platform. See http://www.forta.com/cf/using for info on sites using CF. For ColdFusion information: http://www.eGroups.com/list/cf-talk :: pål :: : : . ___s_p_r_a_y_ Pål Brattberg | [EMAIL PROTECTED] Mob: (+46) 0704 566299 | Tel: (+46) 08 52790122 Här börjar internet | http://www.spray.se === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> I found this article interesting: > > http://www.asptoday.com/articles/2427.htm That was interesting, but it lead to some concerns. For example, JSPs can access the database directly, but most large scale applications don't do this because having front-ends access the database tends to increase the number of connections to the database and often makes the code a bit less maintainable since DB logic is spread out over presentation pages rather than in business logic that is shared, and of course one of the "benefits" of CF was that people skilled with presentation logic didn't have to worry about formulating db queries and the like. Also, CF seems to be directly tied to HTML in that you don't really write HTML, but instead use a proprietary markup that only Allaire supports. Since it auto-generates Javascript and these things -- which is very nice for desktop browser applications I will certainly agree -- it seems like it's not like JSP in that it may not be able to general XML documents on the fly (JSPs can basically create any kind of text output file, not just HTML). Is that true, or just a misreading of a primer? CF does seem much more mature, with lots of goodies that are only promised by taglets. Is there any real-world comparison of CF template processing being faster than bytecode processing within a JVM? The article states that CF is faster, but that seems amazing unless CF templates are compiled in native machine code. David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> I've heard this from others. What really big web sites are run > on CF? http://www.autobytel.com/ > -Original Message- > From: A mailing list about Java Server Pages specification and reference > [mailto:[EMAIL PROTECTED]]On Behalf Of David Wall > Sent: Tuesday, May 09, 2000 10:08 AM > To: [EMAIL PROTECTED] > Subject: Re: ColdFusion vs. JSP > > > > ColdFusion has an advantage that it has a low learning curve. I > am not as > > experienced with JSP to comment on the relative speed of development. > > Since CF is easier to learn an application can be developed quickly. > > When I think about scalable JSPs, I still think of another two tiers of > application development (services and database) that has to be > written, with > JSPs just being the first tier (presentation). So an entire > application is > generally not written in JSP, but JSP is used to control the dynamic > presentation and delivery of information returned by the other > two tiers of > code that has to be written. > > In highly scalable web systems, it seems that the need for a huge > number of > web/presentation systems are often needed to handle all of the connections > from web browsers, and the net connections tend to be slow, causing each > transaction/tcp socket to be open for "a long time." The other two tiers > often run on bigger iron and respond "very quickly" to the > presentation tier > which then has to stream out the data back to the client over the > relatively > slow net link (slow compared to the links within the server farm). > > Does CF combine the "three tiers" (presentation, business logic/services, > database) into a single platform? Multi-tier systems tend to > handle changes > better, such as the inclusion of a desktop app or java applet as a client, > or a switch to using phone-based (WAP or DTMF) or PDA-based front ends -- > that is, anything that is NOT a web browser, which is just one of the many > front ends used by people these days. > > > In terms of performance ColdFusion has to be parsed to the > CFusion Server. > If > > your application has been coded keeping performance in mind > then it should > > not be a problem. I have recoded most applications to improve > performance > > with great results. Jsp has to be compiled into servlets which may be a > > performance issue sometimes(correct me if I am wrong). > > JSPs are compiled once -- unless they are changed. Is that the > same for CF, > or does CF reparse each time (ala ASP). > > > ColdFusion servers can be scaled and managed easily. > > gautam > > I've heard this from others. What really big web sites are run > on CF? It's > unfortunate that this sort of technical information is not more easily > obtained for all sorts of technologies. Our industry doesn't > like to share > information about chosen platforms and architectures, which makes > it hard to > increase the general knowledge about these things. > > David > > == > = > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff > JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re:
Hi Howard, I think tutorial on this page might help you better http://java.sun.com/products/jsp/technical.html Spend like about 10 minutes on the tutorial and you will fell real comfortable on JSP pages. Good Luck Sudhir [EMAIL PROTECTED] Howard Lee wrote: > Is it possible for me to take a look at the code? (banner.jsp and the one > that's calling it). Thank you very much! > > howard > > -Original Message- > From: A mailing list about Java Server Pages specification and reference > [mailto:[EMAIL PROTECTED]]On Behalf Of Arnab Acharya > Sent: Sunday, April 23, 2000 9:44 PM > To: [EMAIL PROTECTED] > Subject: Re: [JSP-INTEREST] > > We used: > > > > > > -Original Message- > > From: Howard Lee [SMTP:[EMAIL PROTECTED]] > > Sent: Monday, April 24, 2000 10:17 AM > > To: [EMAIL PROTECTED] > > Subject: > > > > Has anyone tried using ? Any example would be appreciated. > > Thanks folks! > > > > howard > > > > == > > = > > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff > > JSP-INTEREST". > > Some relevant FAQs on JSP/Servlets can be found at: > > > > http://java.sun.com/products/jsp/faq.html > > http://www.esperanto.org.nz/jsp/jspfaq.html > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff > JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
get vs post
I have a login jsp with a form that uses get. The action is handled by a servlet. The servlet authenticates and forwards to my main html page. The problem is that I want to switch to post so that the username and password is not seen in the url but when I do this I get an error saying "HTTP method POST is not supported by this URL". This is after the servlet has authenticated so I think it is a problem with my requestDispatcher.forward. Any suggestions? Kent === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
At 12:12 PM 5/9/00 , Dan Maher wrote: >Had to reply here. We have heard that a certain toy retailer has serious >scalability problems with CF and their "scaling" solution was to deploy 300+ >servers each with the database loaded into memory. Can anyone verify this >rumour? Yes. Except that it was 2 clusters of 200 servers, one primary, one backup. Now, CF does scale if attention is paid to detail when considering scalability. Good tight code, fast DB access, query caching, etc. all improve the scalability of CF. -Dean -- Dean H. Saxe Product Evolutionist WorldWideTesting.com 770.225.5681 AIM: DHS ATL Rock is dead... Long live Paper and Scissors. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
At 12:31 PM 5/9/00 , David Wall wrote: >Come on! Don't be coy. What retailer (etoys or toysrus or amazon or who?)? >Have they addressed the problem. Why did they put the database on the same >box as the CF? I doubt that's a CF requirement. > >Imagine the fun of upgrading your web app when you have to synchronize 300 >servers at roughly the same time... Its toysrus.com. The DB is not on the same box, there is a 15 minute per machine startup routine which loads the entire product catalog into memory for fast access when a machine is rebooted. Having the DB on the same box as CF is a big no-no for reasons of performance, scalability and most of all security. No, I do not know this first hand, but it comes from a public lecture by a well known Allaire employee. -Dean -- Dean H. Saxe Product Evolutionist WorldWideTesting.com 770.225.5681 AIM: DHS ATL Rock is dead... Long live Paper and Scissors. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Sessions...
I'm wondering what the best way is to restrict access to some pages. If a user tries to access a page that requires authentication, he should be redirected to a login-page, unless he's all ready logged in. How do I manage this in best way? Thanks Gael -- Gael Stehagen [EMAIL PROTECTED] 0708-882910 === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
: Re: ColdFusion vs. JSP > Had to reply here. We have heard that a certain toy retailer has serious > scalability problems with CF and their "scaling" solution was to deploy 300+ > servers each with the database loaded into memory. Can anyone verify this rumour? Come on! Don't be coy. What retailer (etoys or toysrus or amazon or who?)? Have they addressed the problem. Why did they put the database on the same box as the CF? I doubt that's a CF requirement. Imagine the fun of upgrading your web app when you have to synchronize 300 servers at roughly the same time... David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: How can I view client HTTP request headers?
The following code can be placed in a jsp or servlet. It list request
header information like:
Accept = image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-excel, application/msword, application/vnd.ms-powerpoint,
*/*
Referer = http://localhost:8080/your_dir/
Accept-Language = en-us,zh;q=0.5
Accept-Encoding = gzip, deflate
User-Agent = Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)
Host = localhost:8080
Connection = Keep-Alive
Cookie = SESSIONID=To1010mC24918710110150832At
<% Enumeration requestEnum = request.getHeaderNames();
while( requestEnum.hasMoreElements() ) {
String key =
(String)requestEnum.nextElement();
out.print( "" + key + " = " +
request.getHeader(key) );
}//while
%>
-Original Message-
From: Chris Newland [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 09, 2000 9:14 AM
To: [EMAIL PROTECTED]
Subject: How can I view client HTTP request headers?
Hi,
I'm writing a standalone java application to test my
JSP-based service and I'd like to view the HTTP
request headers that are sent to my web server.
Does anyone have any example code / know of a 3rd
party product which does this?
Thanks,
Chris
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: curious. Getting database info
You will see a couple issues here: [1] Database access can be agonizingly slow -- milliseconds and up [2] In-Memory access can be very, very fast -- on the order of microseconds. [3] Memory space is finite, though most servers nowadays can hold up to 2Gb. But you need to think about what you are going to do when your cache size approaches some limit. You will either need some decision mechanism to toss things out of cache and some mechanism to decide when to add things to cache. [4] Caching breeds concurrency issues. What do you do when the Customer record you have cached in-memory is updated by someone else on the server but in the meantime your web app has made changes to its copy? You have both "detection" and "resolution" problems to solve here. Problems [3] and [4] are the main headaches of highly-scalable systems and become moreso (particularly [4]) when the load is distributed across multiple servers. -=- D. J. Rick Reumann wrote: > For example say you have various people in a database and have > their name, phone number, address, etc. stored in there. > Where I work we don't do the database select statements in the > jsp pages but in seperate classes out on the server but obviously > call them from the jsp pages. > > I seem to think it's convenient then to create a vector of , for > example, "people" objects and then iterate through the vector > getting the information I need from each object..getPhoneNumber, > getAddress, etc. Is this a good way to get this information from a > database? > > I'm also curious if it's worth an extra step of accessing the > database first in order to get a row count that you could then use to > give the vector a size? (will this even be worth it for a small > database that maybe only has only 1000 rows?) > Another method I've used is setting up an array of hashtables and > then calling up each hash table and getting phone number, > address, etc. that way. Is this better? === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Sessions all ready defiened?
Session is a reserved var name. You cannot create your own.
Kent
- Original Message -
From: Gael Stehagen <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, May 09, 2000 12:43 PM
Subject: Sessions all ready defiened?
> I get a perculiar error, when executing a jsp-page on Tomcat3.1.
> I can't create a session if I try to name it session like this:
>
> <%
> HttpSession session = request.getSession();
> System.out.println("Session Id: " + session.getId();)
> %>
>
> When I access my page from Tomcat, freshly restarted and emptied on all
> caches, I get the message:
> ___
> org.apache.jasper.JasperException: Unable to compile class for
> JSPwork/localhost_8080%2FCIA/_0002findex_0002ejspindex_jsp_138.java:90:
> Variable 'session' is already defined in this method.
> HttpSession session = request.getSession();
> ^
> 1 error
> ___
>
> I'm certain that I haven't created a session before!
> Where does this come from?
> If I remove "my" session, I do get a Id, from the ghost-session, so
> obviously it exists...
>
> Can anyone shed some light over this?
> /G
>
> O--
>
> Gael Stehagen
> [EMAIL PROTECTED]
> 0708-882910
>
>
===
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
JSP-INTEREST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
>
>
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: model 2 servlet mapping question
Hi, sendRedirect() ends up in the same frame and sometimes this is a problem. bye, Mohan === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
At 12:12 PM 5/9/00 , Dan Maher wrote: >I've heard this from others. What really big web sites are run on CF? It's >unfortunate that this sort of technical information is not more easily >obtained for all sorts of technologies. Our industry doesn't like to share >information about chosen platforms and architectures, which makes it hard to >increase the general knowledge about these things. AutoByTel.com Casio.com Toys R Us javascripts.com onproject.com -Dean -- Dean H. Saxe Product Evolutionist WorldWideTesting.com 770.225.5681 AIM: DHS ATL Rock is dead... Long live Paper and Scissors. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: jsp:forward and UNIX Problems
> > As a general rule, though, the forward tag seems to work much > > better when it is used early on (before the tag) in the JSP. > > Yes, this is true. And it seems to be the same with response.sendRedirect() > as well. > > Very strange indeed. Or does any of you have a good explanation? If you've outputed a header to the client you can't redirect _after_ that, that is you can't redirect when a header i.e Content-type: text/html has been written to the client, unless you've buffered your output. Since a response.sendRedirect() sends a header stating the client to redirect(ASIS). ..bip === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: What page am I on?
Dear all, Does anybody have any idea of there's a property or object in JSP that means that you can pick up the name of the page you are currently on and use it in the JSP scriptlets? Thanks, Simon -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of [Vinod Govindan] Sent: 09 May 2000 09:31 To: [EMAIL PROTECTED] Subject: Re: !!Tomcat configuration!! The mappingsdetails for tomcat server are in server.xml that is in the conf directory of Tomcat! You'll have to do a bit of reading if you have to configure such a big application. The Users Guide will show you the necessary details. Vinod Neelesh cc: Sent by: A Subject: !!Tomcat configuration!! mailing list about Java Server Pages specification and reference 05/09/00 01:41 PM Please respond to A mailing list about Java Server Pages specification and reference Hi all, I am new to using Tomcat. Need urgent help in Tomcat configuration. We are using Tomcat3.1 on Apache 1.3.11 . Our application is quite huge so, we require to maintain our own seperate directory structure for Servlets and Jsp's. So the requirement is to create alias names and map it to these directories(seperate for Servlets and Jsp's). Thanks in advance Regards Neelesh = My home page http://www.geocities.com/siliconvalley/grid/ __ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
At 12:08 PM 5/9/00 , David Wall wrote: > > ColdFusion has an advantage that it has a low learning curve. I am not as > > experienced with JSP to comment on the relative speed of development. > > Since CF is easier to learn an application can be developed quickly. Yeah, CF does have a low learning curve, which IMHO is one of its greatest faults. Yeah, you read that correctly, its a fault. Because of the low barrier to entry it allows anyone with a Windows or Linux box to throw together some hacked up CF and voila, you have a dynamic site. Of course, such poor programming practices lead to poor scaling, among other problems. My experience has shown that one of the largest downfalls of CF programmers is their database skills or the DB behind their application. The net result is that the programmers use CF to do data manipulation which could be done in SQL or stored procedures causing huge performance bottlenecks. Or, the DB was designed poorly thereby making it nearly impossible to retrieve the intended data from the database in a useful manner. >Does CF combine the "three tiers" (presentation, business logic/services, >database) into a single platform? Multi-tier systems tend to handle changes >better, such as the inclusion of a desktop app or java applet as a client, >or a switch to using phone-based (WAP or DTMF) or PDA-based front ends -- >that is, anything that is NOT a web browser, which is just one of the many >front ends used by people these days. No, its really 2-tiered. The presentation and application logic are intimately tied together, though this can be alleviated with some creative programming. The DB is any ODBC compliant RDBMS (Oracle, Sybase, Access *gag*). > > In terms of performance ColdFusion has to be parsed to the CFusion Server. >If > > your application has been coded keeping performance in mind then it should > > not be a problem. I have recoded most applications to improve performance > > with great results. Jsp has to be compiled into servlets which may be a > > performance issue sometimes(correct me if I am wrong). > >JSPs are compiled once -- unless they are changed. Is that the same for CF, >or does CF reparse each time (ala ASP). CF will replace the code if it notices a changed modified date on the file. This can be suppressed and the script is only parsed the first time it is hit if so desired, which is the norm for a production server. -Dean -- Dean H. Saxe Product Evolutionist WorldWideTesting.com 770.225.5681 AIM: DHS ATL Rock is dead... Long live Paper and Scissors. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
session tracking on the server side (connections)
Hi! I'm wondering if there's a way to manage connections to a web application I have? I can put a user in a connection vector when he logs in but taking him out is another thing. Is there any way I can monitor all the users who connected to that particular web app so that I can remove them from the connection list if they don't explicitly log out? I think I heard something about registering a listener to something and that would give me information about disconnections and so on. Can anyone tell me how this is done? Thanks alot in advance. Kind regards, Stefan === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: get vs post
You won't be able to send variables in the URL when using POST, if you still are doing that (which works fine with GET). -Original Message- From: Kent Symanzik [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 09, 2000 12:01 PM To: [EMAIL PROTECTED] Subject: get vs post I have a login jsp with a form that uses get. The action is handled by a servlet. The servlet authenticates and forwards to my main html page. The problem is that I want to switch to post so that the username and password is not seen in the url but when I do this I get an error saying "HTTP method POST is not supported by this URL". This is after the servlet has authenticated so I think it is a problem with my requestDispatcher.forward. Any suggestions? Kent === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: session tracking on the server side (connections)
In one of the faqs below there is the answer to this. Search the faq for "listener". Sam === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
Cold Fusion is a great language and can be geared towards lower end developers (nothing against CF Developers. I have been programming in CF since it was called the DataBase Markup Language and love it, but it is not very difficult). It has the same amount of scaling as an NT box does. The more money you pour into the hardware, the more you will get out of it. As far as scaling to 500 servers with all of the web servers caching the database, I believe that is overkill. Microsoft.com, being one of the most visited sites on the internet (according to media metrix), only has about 150 web servers and another 60, live for use, SQL 7 boxes, and they do just fine. With regard to jsp and it's scalability, if you have one developer that is not as well versed at closing and killing a connection on one page, you can lose all of your connection pooling in a matter of hours. Those are just things that CF takes care of for you. Jeff Steiner -Original Message- From: Dean H. Saxe [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 09, 2000 9:46 AM To: [EMAIL PROTECTED] Subject: Re: ColdFusion vs. JSP At 12:12 PM 5/9/00 , Dan Maher wrote: >I've heard this from others. What really big web sites are run on CF? It's >unfortunate that this sort of technical information is not more easily >obtained for all sorts of technologies. Our industry doesn't like to share >information about chosen platforms and architectures, which makes it hard to >increase the general knowledge about these things. AutoByTel.com Casio.com Toys R Us javascripts.com onproject.com -Dean -- Dean H. Saxe Product Evolutionist WorldWideTesting.com 770.225.5681 AIM: DHS ATL Rock is dead... Long live Paper and Scissors. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: jsp:forward and UNIX Problems
Thanks, but nope, wasn't doing any redirects either. Actually, I've been using the JRUN Studio 3.0 beta from Allaire over the last week, and, though I still don't know why, it does show via color-coding schemes that the tag just ain't right in certain places in the code. The tags which are between the %> and %< tags (not in Java code) are displayed in red, while the Java code is in black and blue (which is what some of us look like after a lot of JSP tinkering.) The tag shows in red when above or within the tag, but not when within the . I haven't read an explanation for this anywhere, but at list this tool is telling me it WON'T be interpreted correctly, even if it doesn't tell me WHY. FYI -Original Message- From: Bip Thelin [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 09, 2000 11:50 AM To: [EMAIL PROTECTED] Subject: Re: jsp:forward and UNIX Problems > > As a general rule, though, the forward tag seems to work much > > better when it is used early on (before the tag) in the JSP. > > Yes, this is true. And it seems to be the same with response.sendRedirect() > as well. > > Very strange indeed. Or does any of you have a good explanation? If you've outputed a header to the client you can't redirect _after_ that, that is you can't redirect when a header i.e Content-type: text/html has been written to the client, unless you've buffered your output. Since a response.sendRedirect() sends a header stating the client to redirect(ASIS). ..bip === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Sessions...
If you use a bean, say loginObj, with session scope once the login is complete, then on the other pages check for if loginObj == null do your sendRedirect here -Original Message- From: Gael Stehagen [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 09, 2000 10:40 AM To: [EMAIL PROTECTED] Subject: Sessions... I'm wondering what the best way is to restrict access to some pages. If a user tries to access a page that requires authentication, he should be redirected to a login-page, unless he's all ready logged in. How do I manage this in best way? Thanks Gael -- Gael Stehagen [EMAIL PROTECTED] 0708-882910 === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Sessions all ready defiened?
I get a perculiar error, when executing a jsp-page on Tomcat3.1.
I can't create a session if I try to name it session like this:
<%
HttpSession session = request.getSession();
System.out.println("Session Id: " + session.getId();)
%>
When I access my page from Tomcat, freshly restarted and emptied on all
caches, I get the message:
___
org.apache.jasper.JasperException: Unable to compile class for
JSPwork/localhost_8080%2FCIA/_0002findex_0002ejspindex_jsp_138.java:90:
Variable 'session' is already defined in this method.
HttpSession session = request.getSession();
^
1 error
___
I'm certain that I haven't created a session before!
Where does this come from?
If I remove "my" session, I do get a Id, from the ghost-session, so
obviously it exists...
Can anyone shed some light over this?
/G
O--
Gael Stehagen
[EMAIL PROTECTED]
0708-882910
===
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
As I understand it, the final analysis showed that CF was not the culprit but that Windows NT was responsible for the app server farm gagging and puking. poor allocation of memory and sockets. The same app was run on a Sun E10K with no problems. My main issue w/ CF is that all the apps are focused on a page and not from an application level. apps are very difficult to maintain because all the code is in the page (or modules). JSP/Servlet apps are much easier to separate domain from presentation concerns. clint At 11:12 AM 5/9/00 -0500, you wrote: >Had to reply here. We have heard that a certain toy retailer has serious >scalability problems with CF and their "scaling" solution was to deploy 300+ >servers each with the database loaded into memory. Can anyone verify this >rumour? > > >-- > > ColdFusion servers can be scaled and managed easily. > > gautam > >I've heard this from others. What really big web sites are run on CF? It's >unfortunate that this sort of technical information is not more easily >obtained for all sorts of technologies. Our industry doesn't like to share >information about chosen platforms and architectures, which makes it hard to >increase the general knowledge about these things. >-- > > > >-- >[EMAIL PROTECTED] >Associate Systems Engineer >HealthStream, The Leader in Online Healthcare Education >(615) 301-3151 > >http://www.healthstream.com > >=== >To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff >JSP-INTEREST". >Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Sessions all ready defiened?
Gael Stehagen wrote:
>
> I get a perculiar error, when executing a jsp-page on Tomcat3.1.
> I can't create a session if I try to name it session like this:
>
> <%
> HttpSession session = request.getSession();
> System.out.println("Session Id: " + session.getId();)
> %>
>
> When I access my page from Tomcat, freshly restarted and emptied on all
> caches, I get the message:
> ___
> org.apache.jasper.JasperException: Unable to compile class for
> JSPwork/localhost_8080%2FCIA/_0002findex_0002ejspindex_jsp_138.java:90:
> Variable 'session' is already defined in this method.
> HttpSession session = request.getSession();
"session" is one of the implicit objects (i.e. automatically available) in JSP.
The servlet generated from the JSP page contains code similar to what you
have, so you don't have to do this at all; just use "session" directly. Since
the generated code also uses the variable name "session" you get this
compilation error.
I suggest you read the JSP specification. It describes this plus a lot of
other things you need to know in order to develop JSP pages.
Hans
--
Hans Bergsten [EMAIL PROTECTED]
Gefion Software http://www.gefionsoftware.com
===
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Do I have to Create another instance of Bean if scope is application
bhupesh vora wrote: > > I have a data base Bean DdBean.class > I have created a instance of that bean db with scope as application in one > of the jsp pasge ( class="sunexamples.beans.myjspbeans.DbBean" /> > > now that as I have given scope as application the id should be visible in > another jsp page pls rectify if I am wrong > > Do I have to Create another instance of DdBean or can I use the same > Instance of the bean in other Jsp pages When you specify application scope for a bean, it's only created the first time someone accesses the page with the action element. But you still need to include the action in all pages where you like to use the bean, since is used to associate the bean with a name that you use in other action elements and scripting code. If the bean already exists, the action doesn't create a new bean. Hans -- Hans Bergsten [EMAIL PROTECTED] Gefion Software http://www.gefionsoftware.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Model 2 & 3 Architecture
I finally had a chance to catch up with the JSP email list, and found this Model 3 discussion to be both interesting and very timely. I am currently redesigning our architecture to include XML. We currently use JSP (.91 spec right now, but we will upgrade when we upgrade our entire architecture). We have numerous authors throughout our company that author and publish content using FrontPage. Overseeing it has become more time consuming than just publishing ourselves. So our new plan is to have them all simply author, and our Internet department will do the publishing. We also have numerous departments that produce "content" in the way of databases. My plan is for all this data to come to us via XML. My departments task then, is to render the XML in a web interface. So I've been playing with XSL and trying to determine the best method to go from XML to the user. Here are a couple of my parameters and I'd be interested to hear your comments: 1. All data will be stored in XML, or be available in XML. As for the data in Sybase, I will need to use SQL to get it out of Sybase, and then create XML from it. Any suggestions? 2. I want the user to get HTML by default, but be able to request an Excel document or a PDF document (the latter for printing, the first for manipulating the data on their own). 3. I was going to user Java classes/packages to get the data, convert it to XML, then pass to JSP, which will apply to the needed XSL, check security, log the use of the page, and present the rendered HTML, Excel document, or PDF. Any suggestions/ideas/comments would be greatly appreciated. After reading Andrews post below. I did become concerned with the complexity of using XSL to render all the data instead of HTML. I can see where it might be more bloat than anything else to use XSL and in my early tests, it certainly is slower. -- Brian N. Burridge Internet Architect The Internet Group Cox Target Media Andrew S Tomlinson wrote: > It's interesting to hear about the broader adoption of XSL in a "Model 3". > I was (and still am) an enthusiastic adopter of XSL but I'd like to add a > cautionary > note and remark that from my experience: > 1. XSL is non-procedural and although it is incredibly easy to use for > rudimentary > operations it rapidly becomes very complex when anything a bit more > sophisticated is > required. This applies to both the features of xsl (callable templates, > attribute sets and so on) and to the XPath syntax for matching node sets. > 2. lack of data-type support means having to bind in java/javascript > extension functions e.g. for date formatting > 3. building XSL files is a radically different proposition to building HTML > (and by extension JSP). This means that you lose the *division of labour* > that assigns UI construction to (presumably less *technical*) Web Designers. > Again I have found this to be the case for anything other than the most > trivial of cases. > 4. lack of "self-documenting" features. It's very difficult to come back to > an XSL file after a while and figure out what some of it actually does; this > raises the bar on expectation for clear comments by the author(s). I have > the same "concerns" with SQL as with XPath but at least in SQL I can perform > an EXPLAIN PLAN to see how the DBMS engine is interpreting the command. I > would really like a similar rationalization capability in XPath. > > Now, on the positive I have found it great for basic forms and the > formatting of static > tables but, as indicated above, I rapidly hit a ceiling where the increasing > complexity > required for incremental functionality was prohibitive. > > How does this compare to others' experiences? > Regards > @ > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP/Package problem
Hmmm.. I tried that too. The compiler doesn't croak on the import statement, but, it doesn't lile the statement where I call one of the method's of the user-defined (unnamed package) class. So, my question is: "Is there any way to instantiate and use a unnamed package class in a named package class?" I know that this is a fundamental Java Question, rather than a JSP one.. So, sorry... Thanks, Shrisha - Original Message - From: "Hans Bergsten" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 09, 2000 11:57 AM Subject: Re: JSP/Package problem > Shrisha Radhakrishna wrote: > > > > Hi All, > > I have a very strange/painful problem. Ok, here I go. I use Weblogic > > 4.5.1 to host my JSPs. The compiler adds a "package jsp_servlet;" to all my > > JSP's when they are converted into servlets. So, in other words all my JSPs > > are in jsp_servlet package. Now, I want to instantiate a user-defined > > class, say x, (that is not in ANY package) from within my servlet. So, a > > statement in my JSP would be something like: > > > > x temp=new x(); > > > > The compiler throws a error that says jsp_servlet.x not found in import. > > Obviously, its looking for x within the jsp_servlet package. How do I > > access the default package from within my servlet? > > This is the way Java works when you use a class in the unnamed package > in another class in a named package. To solve it you must use an import > statement for the class in the unnamed package, i.e. > > <%@ page import="x" %> > > Hans > -- > Hans Bergsten [EMAIL PROTECTED] > Gefion Software http://www.gefionsoftware.com > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets __ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP: jsp:forward and UNIX Problems
"Yandle, Nigel" wrote: > > Hi, > > I'm using http://www.gefionsoftware.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP/Package problem
Shrisha Radhakrishna wrote: > > Hi All, > I have a very strange/painful problem. Ok, here I go. I use Weblogic > 4.5.1 to host my JSPs. The compiler adds a "package jsp_servlet;" to all my > JSP's when they are converted into servlets. So, in other words all my JSPs > are in jsp_servlet package. Now, I want to instantiate a user-defined > class, say x, (that is not in ANY package) from within my servlet. So, a > statement in my JSP would be something like: > > x temp=new x(); > > The compiler throws a error that says jsp_servlet.x not found in import. > Obviously, its looking for x within the jsp_servlet package. How do I > access the default package from within my servlet? This is the way Java works when you use a class in the unnamed package in another class in a named package. To solve it you must use an import statement for the class in the unnamed package, i.e. <%@ page import="x" %> Hans -- Hans Bergsten [EMAIL PROTECTED] Gefion Software http://www.gefionsoftware.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
tomcat configuration file
I had a statement in the tomcat-apache.conf fie "LoadModule jserv_module libexec/mod_jserv.so" When i tried to start apache, there is a errro message "invalid command 'LoadModule', perhap mis-spelling or defined by a module not included in the server configuration" I am using linux, apache and tomcat. Did i need to included any module in apache configuration file? Which module is it? thanks Get your FREE Email at http://mailcity.lycos.com Get your PERSONALIZED START PAGE at http://my.lycos.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: How should i run JSPs on JRun
Hi, I have nothing personal about JRun and infact i am currently using OrionServer. But if you have already setup JRun and want to test you JSP pages, then here is the easy way to go about. First run some of the sample JSP pages, which can be run from the start page of JRun. Check that the name of the JSP pages is numbered as sort of "JSP10" or similar. (I don't if this is changed now). JSP actually supports previous versions of JSP and distinguishes the version with the filename. When file name is "JSP10" then version 1.0 of JSP syntax is supported. Be sure to rename your JSP file name with the extension that is most recently supported by JRun. You can see this when you run the sample JSP examples that are provided with JRun. Next search for the (JSP) file name from one of the examples and in the directory where you installed JRun. This should give you in which directory you would be placing your JSP pages. The rest, start writing your JSP with the latest syntaxt and they should be working fine. Hope this helps. Sudhir [EMAIL PROTECTED] http://www.javacommerce.com Ramgopal Mudigonda wrote: > Hi, > > I have PWS(Personal Web Server) on Win'98.I've installed JRun2.3.3. Now, i've > started PWS and JRun.But, when i call a JSP then i'm getting the following > error: > > HTTP/1.0 500 Server Error (1157) > > Can some one suggest me as how to execute JSPs on JRun+PWS > > -Ram > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> With regard to jsp and it's scalability, if you have one developer that is > not as well versed at closing and killing a connection on one page, you can > lose all of your connection pooling in a matter of hours. > > Those are just things that CF takes care of for you. > > Jeff Steiner Actually, while I would agree that this would be a bug, it also is true that most large scale systems would not have web pages opening DB connections anyway, connection pools or not. It's just a design issue that JSPs are best used when they are related to presentation logic rather than handling business logic, etc. The number of pages that might query something as simple as a "hit count" can be large, but most architects would ensure that such a "feature" would be written once and simply called (taglib, or simple bean.getXX() method). This allows the implementation to change, to have the number be memory resident rather than extracted from a database, or perhaps calculated from a series of queries, or even having the database move to another platform and not having to worry about changing EVERY page that references the table directly. There is a benefit to reuse and encapsulation and providing services to myriad front ends, not just HTML-based desktop web browsers. David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: WebSphere 2.x and JSP
Hi, Here is the best I can do for the beta JSP. http://as400.rochester.ibm.com/products/websphere/docs/as400v302/docs/jsp91s yn.html Thanks Piotr Peter. -Original Message- From: Piotr Wierzbicki To: [EMAIL PROTECTED] Sent: 5/4/00 7:50 PM Subject: Re: WebSphere 2.x and JSP Hi, AFAIK Websphere Application Server (WAS) 2.x supports only JSP v 0.9x and there's nothing you can do about short of upgrading to WAS 3.x (supporting both 0.91 and 1.0) or choosing another appserver, possibly supporting 1.0/1.1. And no, I could not find 0.9x specs on Sun's site. Regards, Piotr -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Peter Liu Sent: Thursday, May 04, 2000 18:53 To: [EMAIL PROTECTED] Subject: WebSphere 2.x and JSP Hi, If I have to use WebSphere 2.x, is it I can only use JSP beta, not 1.0 or 1.1? Is there any way to work around without changing the app server? If not, where I can get the spec for JSP beta which supported by WebSphere 2.x? Thanks all. Peter. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> As I understand it, the final analysis showed that CF was not the culprit > but that Windows NT was responsible for the app server farm gagging and > puking. poor allocation of memory and sockets. > The same app was run on a Sun E10K with no problems. Very interesting. I suppose we'll hear how this has been fixed with Win2k, though. > My main issue w/ CF is that all the apps are focused on a page and not from > an application level. apps are very difficult to maintain because all the > code is in the page (or modules). > JSP/Servlet apps are much easier to separate domain from presentation concerns. > > clint Exactly my concern when I see SQL statements embedded in pages. The main idea behind programming for years has been to consolidate logic into functions, then into methods, or into services -- all basically defining functionality as a black box existing behind an API. When that most basic of design goals is abandoned because it's quick and easy to code, major failures lurk around the corner as the system grows in complexity and eventually needs to scale up. David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: WebSphere 2.x and JSP
This email is going to the wrong person [EMAIL PROTECTED] wrote: > Hi, Here is the best I can do for the beta JSP. http://as400.rochester.ibm.com/products/websphere/docs/as400v302/docs/jsp91s yn.html Thanks Piotr Peter. -Original Message- From: Piotr Wierzbicki To: [EMAIL PROTECTED] Sent: 5/4/00 7:50 PM Subject: Re: WebSphere 2.x and JSP Hi, AFAIK Websphere Application Server (WAS) 2.x supports only JSP v 0.9x and there's nothing you can do about short of upgrading to WAS 3.x (supporting both 0.91 and 1.0) or choosing another appserver, possibly supporting 1.0/1.1. And no, I could not find 0.9x specs on Sun's site. Regards, Piotr -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Peter Liu Sent: Thursday, May 04, 2000 18:53 To: [EMAIL PROTECTED] Subject: WebSphere 2.x and JSP Hi, If I have to use WebSphere 2.x, is it I can only use JSP beta, not 1.0 or 1.1? Is there any way to work around without changing the app server? If not, where I can get the spec for JSP beta which supported by WebSphere 2.x? Thanks all. Peter. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Do I have to Create another instance of Bean if scope is application
Please stop sending this stuff to the wrong address. A mailing list about Java Server Pages specification and reference <[EMAIL PROTECTED]> wrote: > bhupesh vora wrote: > > I have a data base Bean DdBean.class > I have created a instance of that bean db with scope as application in one > of the jsp pasge ( class="sunexamples.beans.myjspbeans.DbBean" /> > > now that as I have given scope as application the id should be visible in > another jsp page pls rectify if I am wrong > > Do I have to Create another instance of DdBean or can I use the same > Instance of the bean in other Jsp pages When you specify application scope for a bean, it's only created the first time someone accesses the page with the action element. But you still need to include the action in all pages where you like to use the bean, since is used to associate the bean with a name that you use in other action elements and scripting code. If the bean already exists, the action doesn't create a new bean. Hans -- Hans Bergsten [EMAIL PROTECTED] Gefion Software http://www.gefionsoftware.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Model 2 & 3 Architecture
Lee, It sounds like what you are doing is quite similar to our approach (using XSLT at design-time to generate JSP files). I agree with your assessment of the two variants for applying XSLT to the JSP Model 2 architecture. I'm not sure it qualifies as a whole new model though. How about: JSP Model ++2 (for XSLT preprocessing input XML to produce the JSP) versus JSP Model 2++ (for XSLT postprocessing output XML from JSP execution) - Mike Van Riper [EMAIL PROTECTED] > -Original Message- > From: Lee Elenbaas [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, May 09, 2000 2:31 AM > To: [EMAIL PROTECTED] > Subject: Re: Model 2 & 3 Architecture > > > What i have learned is from listening in this list. > Model 2 is setting a single entrance servlet to all your > JSPs. that servlet > performs common tasks like ID user and secuity tests and then > forwards the > request to the appropriate JSP/servlet, that JSP/Servlet jenerates the > HTML/content that the user sees > > Model 3 adds another layer of XML. There are two variations: > JSP/Servlet generates XML, that XML gows through XSLT (usually in the > server) to what the user sees. > The other approach (and the one we are testing in our > company) is XML that > are trasformed through XSLT to JSP pages, those JSP pages generate the > HTML/content that the user sees. > > Both variations added a level of seperation between the UI > design and the > java code. > The 1st variation has the added advantage of being more > client responsive. > This means you can generate using the same JSP and XML different views > according to the user platform: browser, WAP device... > The 2nd variation has the advantage of removing the XSLT > overhead from the > runtime. (and to my opinion it can also provide what the 1st variation > provides, but with more jenerated JSPs) > > lee > > Lee Elenbaas > ViryaNet > [EMAIL PROTECTED] > > -Original Message- > From: A mailing list about Java Server Pages specification > and reference > [mailto:[EMAIL PROTECTED]]On Behalf Of Germán López Castro > Sent: Tuesday, May 09, 2000 11:09 AM > To: [EMAIL PROTECTED] > Subject: Model 2 & 3 Architecture > > > Hi-u-all. > > I think I've got a black hole in my acknoledgement, but... could > anyone explain me what architecture 2 & 3 are exactly and where can I > get further information? > > Thanxalot. > > > > > > > > > Consigue tu dirección de email gratis y permanente en http://WWW.LETTERA.NET = To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=P http://www.jguru.com/jguru/faq/faqpage.jsp?name=rvlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JRUN and IPlanet -- JRUN crashes
I'd be willing to bet you're using Sun's 1.2.2_05 JVM. Want to check? There's a bug with class unloading in that JVM (such as the class unloading and reloading that goes on when you are developing JSPs and servlets), which can throw intermittent ArrayIndexOutOfBoundsExceptions and hang the VM. If you are using that version of Sun's JVM, get 1.2.2_05a, which fixes the bug. Scott Stirling -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Lisa Lewis Sent: Tuesday, May 09, 2000 11:48 AM To: [EMAIL PROTECTED] Subject: JRUN and IPlanet -- JRUN crashes I am developing an application that uses JSP 1.0 and Servlets. I use JRUN 2.3 Build 157 (the latest) with IPlanet webserver 4.0. I consistently get errors such as: 500 Internal Server Error com.livesoftware.jsp.JSPServlet: java.lang.ArrayIndexOutOfBoundsException: 5173296 and 500 Internal Server Error GuiControllerServlet: java.lang.ArrayIndexOutOfBounds Exception: -1 After I get these errors, I must stop and restart JRUN in order to even run the SnoopServlet. I am running Solaris 2.7 with 256M of memory. Does anyone have any idea of what is going on here? I am extremely frustrated. (I have successfully used JRUN for servlets with Netscape Server 3.51). I am using jdk1.2 and servlet api 2.1 There is absolutely nothing special about what I am doing. I have a GuiControllerServlet that is called upon pressing a submit button. This Servlet uses the RequestDispatcher object to forward the request to a jsp page for display. The problem is intermittent. Thanks very much Lisa === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: JSP/Package problem
Shrisha Radhakrishna wrote: > > Hmmm.. I tried that too. The compiler doesn't croak on the import > statement, but, it doesn't lile the statement where I call one of the > method's of the user-defined (unnamed package) class. > So, my question is: "Is there any way to instantiate and use a unnamed > package class in a named package class?" I know that this is a fundamental > Java Question, rather than a JSP one.. So, sorry... So what is the exact error message you get? If it's not ClassNotFound or similar, may there's a syntax error in your scriptlet. Hans > - Original Message - > From: "Hans Bergsten" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, May 09, 2000 11:57 AM > Subject: Re: JSP/Package problem > > > Shrisha Radhakrishna wrote: > > > > > > Hi All, > > > I have a very strange/painful problem. Ok, here I go. I use > Weblogic > > > 4.5.1 to host my JSPs. The compiler adds a "package jsp_servlet;" to > all my > > > JSP's when they are converted into servlets. So, in other words all my > JSPs > > > are in jsp_servlet package. Now, I want to instantiate a user-defined > > > class, say x, (that is not in ANY package) from within my servlet. So, > a > > > statement in my JSP would be something like: > > > > > > x temp=new x(); > > > > > > The compiler throws a error that says jsp_servlet.x not found in import. > > > Obviously, its looking for x within the jsp_servlet package. How do I > > > access the default package from within my servlet? > > > > This is the way Java works when you use a class in the unnamed package > > in another class in a named package. To solve it you must use an import > > statement for the class in the unnamed package, i.e. > > > > <%@ page import="x" %> > > > > Hans > > -- > > Hans Bergsten [EMAIL PROTECTED] > > Gefion Software http://www.gefionsoftware.com -- Hans Bergsten [EMAIL PROTECTED] Gefion Software http://www.gefionsoftware.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
My recent reading of the Allaire site is that they're running as fast as they can to get to be "pure J2EE", while of course trying to keep the existing customers happy. Martin David Wall wrote: > Can anybody discuss the relative merits of ColdFusion and JSP in terms of > speed of development, scalability and manageability? > > David > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Summary of TAGLIB availability?
I've been checking the sites mentioned here for existing (free or at least independent of a server company) taglibs. Not much out there yet, apparently--mail and file (upload) handling, and sub 1.0 versions of other stuff. Or am I missing the motherlode somewhere?? Related question: assuming this is too new for there to be product available, does anyone have an idea what the work-in-progress looks like? That is, is someone doing a JNDI (directory-access) TAGLIB? A report-writing TAGLIB? A JDBC TAGLIB? A charting TAGLIB? Authentication? etc. TIA Martin === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
Allaire purchased JRun servlet engine last June, and in the last month or so purchased Ejbt (?), an enterprise level servlet engine that supports EJB. So, what does that tell you about where Allaire thinks the future of server side dynamic content is? Looks like they are betting on Java. I have not used CF, but IMHO, if you were to choose between CF and JSP/servlets at this point in time, the choice would have to be an open technology like JSP/servlets over a proprietary technology like CF. A java based solution is more portable between OS/web server/hardware, more flexible, and more extensible. My goal for JSP is to use it for presentation only, put all the business logic in reusable components such as beans and tag libs so that web publshers can create dynamic content using a publishing tool without having to write any java code. I have done some performance testing of different servlet engines. Overall I have been very impressed with performance, especially when using the Sun HotSpot JVM which can do profiled selective optimization of java byte codes into native CPU opcodes so that java code that gets executed frequently eventually ends up running almost as fast as a compiled executable. Plus the HotSpot GC performs very well in a server environment. Just my 2 cents, your mileage may vary. Regards, Glenn Martin Smith wrote: > > My recent reading of the Allaire site is that they're running as fast as they can > to get to be "pure J2EE", while of course trying to keep the existing customers > happy. > > Martin > > David Wall wrote: > > > Can anybody discuss the relative merits of ColdFusion and JSP in terms of > > speed of development, scalability and manageability? > > > > David > > > > === > > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > > Some relevant FAQs on JSP/Servlets can be found at: > > > > http://java.sun.com/products/jsp/faq.html > > http://www.esperanto.org.nz/jsp/jspfaq.html > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets -- -- Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder| MOREnet System Programming | * if iz ina coment. | Missouri Research and Education Network | */ | -- === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
Question David. Since JSPs and Servletts are exactly the same, where does the business logic reside, in beans only? Ernie - Original Message - From: David Wall <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 09, 2000 4:23 PM Subject: Re: ColdFusion vs. JSP > > With regard to jsp and it's scalability, if you have one developer that is > > not as well versed at closing and killing a connection on one page, you > can > > lose all of your connection pooling in a matter of hours. > > > > Those are just things that CF takes care of for you. > > > > Jeff Steiner > > Actually, while I would agree that this would be a bug, it also is true that > most large scale systems would not have web pages opening DB connections > anyway, connection pools or not. It's just a design issue that JSPs are > best used when they are related to presentation logic rather than handling > business logic, etc. The number of pages that might query something as > simple as a "hit count" can be large, but most architects would ensure that > such a "feature" would be written once and simply called (taglib, or simple > bean.getXX() method). This allows the implementation to change, to have the > number be memory resident rather than extracted from a database, or perhaps > calculated from a series of queries, or even having the database move to > another platform and not having to worry about changing EVERY page that > references the table directly. There is a benefit to reuse and > encapsulation and providing services to myriad front ends, not just > HTML-based desktop web browsers. > > David > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> Question David. > > Since JSPs and Servletts are exactly the same, where does the > business logic > reside, in beans only? Not always. Model 2 would have all forms (and even all links/requests if you want) go to a single controller. That controller can do one of many things, but the way I like best is what Daniel and Craig are doing..using an action class per form/page to handle the action of that particular form. The use of beans in this case would be entity related. Storing of the data (Model in an MVC pattern) and get/set methods for that data, as well as any methods that work on that data, such as storing it, retrieving it, etc. The logic class(es) are used by the action class to perform the logic with the data from the form, and return a result back to the action class, which then forwards to a JSP page to display the results, or, to display a second (or more) form in a series of forms to complete a transaction. Ofcourse..this is but one use of JSP. You could use Model 1/1.5 and have JSP pages call on JavaBean methods to do the logic, as well as use JavaBeans to store session state information. > > > With regard to jsp and it's scalability, if you have one > developer that > is > > > not as well versed at closing and killing a connection on > one page, you > > can > > > lose all of your connection pooling in a matter of hours. > > > > > > Those are just things that CF takes care of for you. > > > > > > Jeff Steiner As noted by another reply, I cant understand why any page would open a connection. The page should be considered one of many views of data and logic. If it is doing logic and/or persistence in it, in my opinion that is a very bad design. The beauty of the Model 2 (and now the Model 2++ or Model 3) is that you use JSP to display the results as well as static pages. Its a VIEW of a result. Thus, not only can JSP be used, but other client applications can use the logic and persistence of the application and view it in their own way. The example I always liken this to is the bank use. A bank has a "central" database and logic server. The teller has one view of it. The ATM is yet another view of the same data (and logic use). And the web can be a third view of the same data. I would bet a well organized application for banks would allow all three of these views to use the same logic code and the same data (obviously), so that each view doesn't require any logic in it at all. Infact, the only logic that should ever be done in the VIEW is logic to display things..such as looping or conditional statements to display one thing or another. Even so, with JSP 1.1, taglibs and/or the use of javabean "html helper" methods can keep the java code out of JSP pages, other than the simple bean.getXXX() calls. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Cookie Reading/Writing!
I am sending cookies in the Response Obejct using Servlets and later reading using Request Object. It is working fine on some machines and not on others. What could be the possible scenario for this to fail. Has the OS or Web Browset something to do with it ? Regards Visit http://www.niit.com for eCommerce Solutions. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: ColdFusion vs. JSP
> Since JSPs and Servletts are exactly the same, where does the business logic > reside, in beans only? > > Ernie Well, being pedantic can be troublesome, and it's really mostly important for either large projects or sites that will become very large. For example, context-free (stateless) services are harder to write a run a bit slower, so a small site without too much traffic can get away with maintaining lots of state. But a huge site with massive traffic won't be able to scale well or handle failures as well, so context-free is the way to go. In this discussion, the business logic should not be in a servlet, for as you said, JSPs are implemented in terms of servlets. Servlets are web-only technologies (at least now), based on HTTP. If you have any other client attempt to access your business logic (applet, desktop app, phone, etc.), then servlets aren't appropriate, and I'd guess that means you'd not want your business logic there unless the business logic is web-only, which it may. In general, the "new" model is for the business logic to be in EJBs, which are remote calls from the servlet. If you are small enough, you can put them in beans and skip the remote calls. Then, you can put other front ends that can use those same beans, or if you need to migrate, you can simply put a Remote interface on your beans and you're off and running (assuming your params and return values are all Serializable of course). David === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Cookie Reading/Writing!
The client web browser has options whether to accept the cookies or not!! So thats why some m/c accept the cookies and others not -Original Message- From: Nigam Shalabh [SMTP:[EMAIL PROTECTED]] Sent: Wednesday, May 10, 2000 9:40 AM To: [EMAIL PROTECTED] Subject:Cookie Reading/Writing! I am sending cookies in the Response Obejct using Servlets and later reading using Request Object. It is working fine on some machines and not on others. What could be the possible scenario for this to fail. Has the OS or Web Browset something to do with it ? Regards Visit http://www.niit.com for eCommerce Solutions. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Sessions all ready defiened?
Use directly
<%
request.getSession(true);
System.out.println("Session Id: " + session.getId());
%>
instead of
> <%
> > HttpSession session = request.getSession();
> > System.out.println("Session Id: " + session.getId();)
> > %>
first of all go thru jsp spec,
Sreenivas
- Original Message -
From: "Kent Symanzik" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, May 09, 2000 10:44 PM
Subject: Re: Sessions all ready defiened?
> Session is a reserved var name. You cannot create your own.
>
> Kent
>
> - Original Message -
> From: Gael Stehagen <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, May 09, 2000 12:43 PM
> Subject: Sessions all ready defiened?
>
>
> > I get a perculiar error, when executing a jsp-page on Tomcat3.1.
> > I can't create a session if I try to name it session like this:
> >
> > <%
> > HttpSession session = request.getSession();
> > System.out.println("Session Id: " + session.getId();)
> > %>
> >
> > When I access my page from Tomcat, freshly restarted and emptied on all
> > caches, I get the message:
> > ___
> > org.apache.jasper.JasperException: Unable to compile class for
> > JSPwork/localhost_8080%2FCIA/_0002findex_0002ejspindex_jsp_138.java:90:
> > Variable 'session' is already defined in this method.
> > HttpSession session = request.getSession();
> > ^
> > 1 error
> > ___
> >
> > I'm certain that I haven't created a session before!
> > Where does this come from?
> > If I remove "my" session, I do get a Id, from the ghost-session, so
> > obviously it exists...
> >
> > Can anyone shed some light over this?
> > /G
> >
> > O--
> >
> > Gael Stehagen
> > [EMAIL PROTECTED]
> > 0708-882910
> >
> >
>
===
> > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> > Some relevant FAQs on JSP/Servlets can be found at:
> >
> > http://java.sun.com/products/jsp/faq.html
> > http://www.esperanto.org.nz/jsp/jspfaq.html
> > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
> >
> >
>
>
===
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
JSP-INTEREST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
===
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Java Problem
I had the similar problem. I was running Weblogic and each access to it caused Dr. Watson to be executed and the server crashed. On careful examination, I found out that this was hapopening only on select machines where java 1.2.2 (download) was installed. I then uninstalled the same and installed java 1.2 (download) and till date I have not received the Dr. Watson error. So Ritu, you problem could be the same. Try using a different download of java. That could be the problem. Hope this helps. Contact if help needed. David - Original Message - From: Ritu Kamboj <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 09, 2000 1:55 PM Subject: Java Problem > Hi... > i am trying to run a jsp application on Apache- Tomcat...Server.. > But the moment i accesss data from database... > It starts giving java.exe Application Error. > (Like some problem in referenced memoryMemory couldn't be read...) > > If anybody have any idea..Please let me know.. > Thanks in advance.. > Ritu > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Expire Page
Thanks Atif, but this did not work.
Any other ideas?
- Original Message -
From: Majeed, Atif <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, May 08, 2000 7:51 PM
Subject: Re: Expire Page
> You can use
> HttpServletResponse.setHeader("Pragma", "no-cache");
> or send an equivalent Meta tag
>
>
> Atif
>
> -Original Message-
> From: David Gowe [mailto:[EMAIL PROTECTED]]
> Sent: Monday, May 08, 2000 1:08 AM
> To: [EMAIL PROTECTED]
> Subject: Expire Page
>
>
> Hello!
>
> I have the following requirement:
>
> When I use a JSP page and submit it to the the servlet, I want that page
to
> expire (viz.,. the user should not be able to press the back button on the
> browser and visit that page again). Is it sufficient if we specified the
> "scope" in the usebean tag to "page". Will that only affect the scope of
the
> bean, or is there some additional tags to be used.
>
> Regards
>
> David Gowe
>
>
===
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
>
>
===
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
JSP-INTEREST".
> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
>
===
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Cookie Reading/Writing!
Disabling of cookies in the browser settings, could be one reason for such differing behaviour. Have a nice day. With regards, Sachin S. Khanna. www.emailanorder.com - Original Message - From: Nigam Shalabh <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, May 10, 2000 9:39 AM Subject: Cookie Reading/Writing! > I am sending cookies in the Response Obejct using Servlets and later > reading using Request Object. It is working fine on some machines and not > on others. What could be the possible scenario for this to fail. Has the OS > or Web Browset something to do with it ? > > Regards > > > > Visit http://www.niit.com for eCommerce Solutions. > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: get vs post
Do you have a post method in your servlet, this could be one reason for the error. Have a nice day. With regards, Sachin S. Khanna. www.emailanorder.com - Original Message - From: Kent Symanzik <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 09, 2000 10:31 PM Subject: get vs post > I have a login jsp with a form that uses get. The action is handled by a > servlet. The servlet authenticates and forwards to my main html page. The > problem is that I want to switch to post so that the username and password > is not seen in the url but when I do this I get an error saying "HTTP method > POST is not supported by this URL". This is after the servlet has > authenticated so I think it is a problem with my requestDispatcher.forward. > > Any suggestions? > > Kent > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Apache With Tomcat
I again repeat my question which i asked yesterday to which i haven't received any replies. What's the use of using Apache With Tomcat when Tomcat itself can service all the requests for servlets ? One more question Can anyone describe what are In-process servlet containers and Out-of-process servlet containers and how does Tomcat relates to them. (Little Description about In-process and Out-of Process servlet containers is given in Tomcat User Guide but more clarification, links about them will be appreciated). Thanks in advance. Nitin === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
