How to force a jsp page to reload an "include" file?

Hi there,
I'm using WebSphere 4.0.2 with the Java 1.3.1 API.
Some of my JSP files includes another JSP file as follows:
<%@include file="constants.jsp"%>The above line came from one of the files entitled "main.jsp".
Other jsp files on our system can rewrite and update the values in constants.jsp.
However, when they do so, main.jsp (and the other files that "include" constants.jsp) doesn't take on the new settings unless I either a) reboot the server or b) force a recompile of main.jsp
Is there any way to have main.jsp pick up when constants.jsp is updated and use the new values without manual intervention?
Thanks!

You might want to use 'touch' task of ANT. it modifies the jsp page modification time thus forcing the pages to reload.

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In portlet project, to navigate between pages, you should not use the URL property to link to a page. Instead, portlets use navigation via action handling. You use the Page Navigation editor to set up links to pages; that is, the navigation editor sets the action property.
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since you are using modbus, a simple error checking is implicit in the protocol and is the comparison between returned checksum and the calculated one on the received message: checksum errors, if any, are an effect of communications errors (you should have at least 2 bits changed and on particular patterns to have the checksum be calculated correctly!). You won't be able to calculate BER on them, but you can calculate PER (Packet Error Rate).
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How can WLS use JSP pages in a Web Application witth just a JRE [Web Application, WAR, JSP, weblogic.jsp.pageCheckSeconds and JRE]

 How can WLS use JSP pages in a Web Application (either a .war file or a war directory structure) without a java compiler?
 I suspect either the JSP specification is flawed (i.e. it doesn't take account of servers using just a JRE), or BEA's implementation is broken.
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 D:\war>jar -tf gmi.war
 META-INF/
 META-INF/MANIFEST.MF
 gmiService.jsp
 WEB-INF/
 WEB-INF/classes/
 WEB-INF/classes/com/
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 WEB-INF/classes/com/bt/gmi/
 WEB-INF/classes/com/bt/gmi/gmiService.class
 WEB-INF/getList.xsl
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 WEB-INF/web.xml
 WEB-INF/weblogic.xml
 tmpwar/
 tmpwar/jsp_servlet/
 tmpwar/jsp_servlet/_gmiservice.class
 tmpwar/jsp_servlet/_gmiservice.java
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 weblogic.jsp.pageCheckSeconds
 -1
 weblogic.jsp.precompile
 false
 weblogic.jsp.compileCommand
 javac
 weblogic.jsp.verbose
 true
 weblogic.jsp.packagePrefix
 jsp_servlet
 weblogic.jsp.keepgenerated
 false
 And in the weblogic.properties file:
 weblogic.httpd.webApp.gmi=war/gmi
 I've also tried with the .war file, but that insists on creating another tmpwar directory outside of the .war file.
 Then, although I have set pageCheckSeconds to -1 (don't check and don't recompile) ter production server still attempts to recompile the JSP's:
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: init
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param verbose initialized to: true
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param packagePrefix initialized to: jsp_servlet
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param compileCommand initialized to: javac
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param srcCompiler initialized to weblogic.jspc
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param superclass initialized to null
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param workingDir initialized to: /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param pageCheckSeconds initialized to: -1
 Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: initialization complete
 Mon Sep 25 11:40:12 BST 2000: <WebAppServletContext-gmi> Generated java file: /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java
 Mon Sep 25 11:40:14 BST 2000:<E> <WebAppServletContext-gmi> Compilation of /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java failed: Exception in thread "main" java.lang.NoClassDefFoundError: sun/tools/javac/Main
 java.io.IOException: Compiler failed executable.exec([Ljava.lang.String;[javac, -classpath, /opt/Solaris_JRE_1.2.1_04/lib/rt.jar:/opt/Solaris_JRE_1.2.1_04/lib/i18n.jar:/opt/Solaris_JRE_1.2.1_04/classes:/var/wls/5.1/weblogic/lib/weblogic510sp4boot.jar:/var/wls/5.1/weblogic/classes/boot:/var/wls/5.1/weblogic/eval/cloudscape/lib/cloudscape.jar:/var/wls/5.1/weblogic/lib/wleorb.jar:/var/wls/5.1/weblogic/lib/wlepool.jar:/var/wls/5.1/weblogic/lib/weblogic510sp4.jar:/var/wls/5.1/weblogic/license:/var/wls/5.1/weblogic/classes:/var/wls/5.1/weblogic/lib/weblogicaux.jar:/opt/wls-servers/gmiServer/weblogic/gmiServer/serverclasses:/opt/wls-servers/gmiServer/weblogic/lotusxsl.jar:/opt/wls-servers/gmiServer/weblogic/xerces.jar:/opt/wls-servers/gmiServer/weblogic/logging.jar::/opt/wls-servers/gmiServer/weblogic/war/gmi/WEB-INF/classes:/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war, -d, /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war, /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java])
 at java.lang.Throwable.fillInStackTrace(Native Method)
 at java.lang.Throwable.fillInStackTrace(Compiled Code)
 at java.lang.Throwable.<init>(Compiled Code)
 at java.lang.Exception.<init>(Compiled Code)
 at java.io.IOException.<init>(Compiled Code)
 at weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(Compiled Code)
 at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:200)
 at weblogic.servlet.jsp.JspStub.compilePage(Compiled Code)
 at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:173)
 at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:187)
 at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:118)
 at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:142)
 at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:744)
 at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:692)
 at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:251)
 at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:363)
 at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:263)
 at weblogic.kernel.ExecuteThread.run(Compiled Code)


The default Java compiler from sun lives in the tools.jar that comes with
 the JDK. Just add that to your set of JARs which are deployed in production
 and you should be fine. No need to install the full JDK - just make the
 tools.jar available to WebLogic.
 Regards
 James
 James Strachan
 =============
 email: [email protected]
 web: http://www.metastuff.com
 "Martin Webb" <[email protected]> wrote in message
 news:[email protected]...
 >
 > How can WLS use JSP pages in a Web Application (either a .war file or a
 war directory structure) without a java compiler?
 >
 > I suspect either the JSP specification is flawed (i.e. it doesn't take
 account of servers using just a JRE), or BEA's implementation is broken.
 >
 > Production servers do not have a JDK installed. They only have a JRE.
 Therfore a java compiler is not present on the machine that the Web
 Application is deployed onto.
 >
 > On the development machine, when the server is requested to load the JSP
 it creates a tmpwar directory within the Web Application directory
 structure. This is then included in the resultant .war file thus:
 >
 > D:\war>jar -tf gmi.war
 > META-INF/
 > META-INF/MANIFEST.MF
 > gmiService.jsp
 > WEB-INF/
 > WEB-INF/classes/
 > WEB-INF/classes/com/
 > WEB-INF/classes/com/bt/
 > WEB-INF/classes/com/bt/gmi/
 > WEB-INF/classes/com/bt/gmi/gmiService.class
 > WEB-INF/getList.xsl
 > WEB-INF/getListByConnection.xsl
 > WEB-INF/getListByDistrict.xsl
 > WEB-INF/getListByDistrictConnection.xsl
 > WEB-INF/lib/
 > WEB-INF/source/
 > WEB-INF/source/build.bat
 > WEB-INF/source/gmiService.java
 > WEB-INF/web.xml
 > WEB-INF/weblogic.xml
 > tmpwar/
 > tmpwar/jsp_servlet/
 > tmpwar/jsp_servlet/_gmiservice.class
 > tmpwar/jsp_servlet/_gmiservice.java
 >
 > When deployed on the production server with the web.xml file set to use
 the following values (note XML stripped):
 >
 > weblogic.jsp.pageCheckSeconds
 > -1
 >
 > weblogic.jsp.precompile
 > false
 >
 > weblogic.jsp.compileCommand
 > javac
 >
 > weblogic.jsp.verbose
 > true
 >
 > weblogic.jsp.packagePrefix
 > jsp_servlet
 >
 > weblogic.jsp.keepgenerated
 > false
 >
 >
 > And in the weblogic.properties file:
 >
 > weblogic.httpd.webApp.gmi=war/gmi
 >
 > I've also tried with the .war file, but that insists on creating another
 tmpwar directory outside of the .war file.
 >
 >
 > Then, although I have set pageCheckSeconds to -1 (don't check and don't
 recompile) ter production server still attempts to recompile the JSP's:
 >
 >
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: init
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 verbose initialized to: true
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 packagePrefix initialized to: jsp_servlet
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 compileCommand initialized to: javac
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 srcCompiler initialized to weblogic.jspc
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 superclass initialized to null
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 workingDir initialized to:
 /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp: param
 pageCheckSeconds initialized to: -1
 > Mon Sep 25 11:40:11 BST 2000: <WebAppServletContext-gmi> *.jsp:
 initialization complete
 > Mon Sep 25 11:40:12 BST 2000: <WebAppServletContext-gmi> Generated java
 file:
 /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
 java
 > Mon Sep 25 11:40:14 BST 2000:<E> <WebAppServletContext-gmi> Compilation of
 /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
 java failed: Exception in thread "main" java.lang.NoClassDefFoundError:
 sun/tools/javac/Main
 >
 > java.io.IOException: Compiler failed
 executable.exec([Ljava.lang.String;[javac, -classpath,
 /opt/Solaris_JRE_1.2.1_04/lib/rt.jar:/opt/Solaris_JRE_1.2.1_04/lib/i18n.jar:
 /opt/Solaris_JRE_1.2.1_04/classes:/var/wls/5.1/weblogic/lib/weblogic510sp4bo
 ot.jar:/var/wls/5.1/weblogic/classes/boot:/var/wls/5.1/weblogic/eval/cloudsc
 ape/lib/cloudscape.jar:/var/wls/5.1/weblogic/lib/wleorb.jar:/var/wls/5.1/web
 logic/lib/wlepool.jar:/var/wls/5.1/weblogic/lib/weblogic510sp4.jar:/var/wls/
 5.1/weblogic/license:/var/wls/5.1/weblogic/classes:/var/wls/5.1/weblogic/lib
 /weblogicaux.jar:/opt/wls-servers/gmiServer/weblogic/gmiServer/serverclasses
 :/opt/wls-servers/gmiServer/weblogic/lotusxsl.jar:/opt/wls-servers/gmiServer
 /weblogic/xerces.jar:/opt/wls-servers/gmiServer/weblogic/logging.jar::/opt/w
 ls-servers/gmiServer/weblogic/war/gmi/WEB-INF/classes:/opt/wls-servers/gmiSe
 rver/weblogic/war/gmi/_tmp_war, -d,
 /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war,
 /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
 java])
 > at java.lang.Throwable.fillInStackTrace(Native Method)
 > at java.lang.Throwable.fillInStackTrace(Compiled Code)
 > at java.lang.Throwable.<init>(Compiled Code)
 > at java.lang.Exception.<init>(Compiled Code)
 > at java.io.IOException.<init>(Compiled Code)
 > at
 weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(Compiled Code)
 > at
 weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:200)
 > at weblogic.servlet.jsp.JspStub.compilePage(Compiled Code)
 > at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:173)
 > at
 weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:18
 7)
 > at
 weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
 :118)
 > at
 weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
 :142)
 > at
 weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
 l.java:744)
 > at
 weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
 l.java:692)
 > at
 weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContext
 Manager.java:251)
 > at
 weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:363)
 > at
 weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:263)
 > at weblogic.kernel.ExecuteThread.run(Compiled Code)
 >
 >
 >

How to run a jsp page

hello to all of u
i m bit comfortable with SERVLET and please tell me that how to run a JSP page.i m using TOMCAT.
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thank you
bye

Why oh WHY do you want to fiddle with the server.xml file?
You don't need to.
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If you put your hello.jsp in the ROOT directory, http://localhost:8080/hello.jsp will work.
However it is not recommended to use the ROOT directory. Make your own one.
Create a new directory in the "Webapps" directory eg "test"
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under test create a directory called "WEB-INF"
Copy the web.xml file from [TOMCAT_HOME]/webapps/ROOT/web-inf into the new web-inf directory.
Now go to http://localhost:8080/test/hello.jsp
Cheers,
evnafets

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Hi guys,
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Hi guys,
I have a doubt with JSP include tag. The
g. The problem is ..
Can we include a JSP page in an already included JSP
Page
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I have one JSP page
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he "include.jsp" I am including "include1.jsp"
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content which is there in the "include1.jsp" but it is
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first of all let me know whether it is possible or
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required to do this..
fast...
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SuneelGoodatJava wrote:
Hi ,
I am doing messenger kind of program using JSP and tomcat server.
When i type message it is showing in the some div. If some other person request for the same page by giving my IP address and jsp page, he should able to see what i have typed on page so far.
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%

How to force a jsp page to reload an "include" file?

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