Automatic reload of Struts .properties file

How do I configure the Sun Java System Web Server to automatically reload the Struts ApplicationResources.properties file? If this file changes, I would prefer to not have to restart the server.

TMary
Can you print out any message from your properties file?
If not I would suggest you check your reference to the properties file in your struts-config.xml.
In struts-config.xml you should have something like the following:
<message-resources parameter="java/MessageResources" null="false"/>

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    >
    >

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    [wlappc] [appc] Compiling EAR module 'wwlweb'
    [wlappc] [JspcInvoker]Checking web app for compliance.
    [wlappc] <Jul 28, 2004 4:38:48 PM GMT-05:00> <Info> <HTTP> <BEA-101047> <[ComplianceChecker] Validating the servlet element with servlet-name named "wwlActionServlet".>
    [wlappc] <Jul 28, 2004 4:38:48 PM GMT-05:00> <Info> <HTTP> <BEA-101047> <[ComplianceChecker] Checking servlet-mapping for servlet name : "wwlActionServlet".>
    [wlappc] <Jul 28, 2004 4:38:48 PM GMT-05:00> <Info> <HTTP> <BEA-101047> <[ComplianceChecker] Checking filter-mapping with filter-name "I18NFilter".>
    [wlappc] <Jul 28, 2004 4:38:48 PM GMT-05:00> <Info> <HTTP> <BEA-101047> <[ComplianceChecker] Checking filter-mapping with filter-name "Security Filter".>
    [wlappc] [jspc] parsing /admin/jsps/menu.jsp:
    [wlappc] Jul 28, 2004 4:38:50 PM org.apache.struts.util.MessageResourcesFactory createFactory
    [wlappc] SEVERE: MessageResourcesFactory.createFactory
    [wlappc] java.lang.ClassNotFoundException: org.apache.struts.util.PropertyMessageResourcesFactory
    [wlappc] at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
    [wlappc] at java.security.AccessController.doPrivileged(Native Method)
    [wlappc] at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
    [wlappc] at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
    [wlappc] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:272)
    [wlappc] at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
    [wlappc] at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:207)
    [wlappc] at org.apache.struts.util.MessageResourcesFactory.createFactory(MessageResourcesFactory.java:192)
    [wlappc] at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:576)
    [wlappc] at org.apache.struts.util.RequestUtils.<clinit>(RequestUtils.java:134)
    [wlappc] at org.apache.struts.util.MessageResourcesFactory.createFactory(MessageResourcesFactory.java:192)
    [wlappc] at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:576)
    [wlappc] at org.apache.struts.taglib.html.BaseTag.<clinit>(BaseTag.java:94)
    [wlappc] at java.lang.Class.forName0(Native Method)
    [wlappc] at java.lang.Class.forName(Class.java:140)
    [wlappc] at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.class$(ELBaseTagBeanInfo.java:81)
    [wlappc] at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.getPropertyDescriptors(ELBaseTagBeanInfo.java:81)
    [wlappc] at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:436)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:372)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:207)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:193)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.parseTagDD(StandardTagLib.java:1323)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.parseDD(StandardTagLib.java:1261)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.<init>(StandardTagLib.java:292)
    [wlappc] at weblogic.servlet.jsp.TagLibHelper.loadTagLib(TagLibHelper.java:314)
    [wlappc] at weblogic.servlet.jsp.JspLexer.loadTagLib(JspLexer.java:145)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE_BODY(JspLexer.java:5015)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE(JspLexer.java:4853)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mDIRECTIVE(JspLexer.java:4699)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mSTANDARD_THING(JspLexer.java:2094)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTOKEN(JspLexer.java:1880)
    [wlappc] at weblogic.servlet.jsp.JspLexer.nextToken(JspLexer.java:1753)
    [wlappc] at weblogic.servlet.jsp.JspLexer.parse(JspLexer.java:963)
    [wlappc] at weblogic.servlet.jsp.JspParser.doit(JspParser.java:106)
    [wlappc] at weblogic.servlet.jsp.JspParser.parse(JspParser.java:230)
    [wlappc] at weblogic.servlet.jsp.Jsp2Java.outputs(Jsp2Java.java:125)
    [wlappc] at weblogic.utils.compiler.CodeGenerator.generate(CodeGenerator.java:258)
    [wlappc] at weblogic.jspc.runJspc(jspc.java:550)
    [wlappc] at weblogic.jspc.runJspc(jspc.java:437)
    [wlappc] at weblogic.servlet.jsp.JspcInvoker.compile(JspcInvoker.java:163)
    [wlappc] at weblogic.appc.compileWAR(appc.java:859)
    [wlappc] at weblogic.appc.compileModules(appc.java:650)
    [wlappc] at weblogic.appc.compileEAR(appc.java:733)
    [wlappc] at weblogic.appc.compileInput(appc.java:458)
    [wlappc] at weblogic.appc.runBody(appc.java:184)
    [wlappc] at weblogic.utils.compiler.Tool.run(Tool.java:146)
    [wlappc] at weblogic.utils.compiler.Tool.run(Tool.java:103)
    [wlappc] at weblogic.appc.main(appc.java:1028)
    [wlappc] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [wlappc] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [wlappc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [wlappc] at java.lang.reflect.Method.invoke(Method.java:324)
    [wlappc] at weblogic.ant.taskdefs.j2ee.CompilerTask.invokeMain(CompilerTask.java:278)
    [wlappc] at weblogic.ant.taskdefs.j2ee.Appc.execute(Appc.java:179)
    [wlappc] at org.apache.tools.ant.Task.perform(Task.java:341)
    [wlappc] at org.apache.tools.ant.Target.execute(Target.java:309)
    [wlappc] at org.apache.tools.ant.Target.performTasks(Target.java:336)
    [wlappc] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
    [wlappc] at org.apache.tools.ant.Project.executeTargets(Project.java:1255)
    [wlappc] at org.apache.tools.ant.Main.runBuild(Main.java:609)
    [wlappc] at org.apache.tools.ant.Main.start(Main.java:196)
    [wlappc] at org.apache.tools.ant.Main.main(Main.java:235)
    [wlappc] Jul 28, 2004 4:38:50 PM org.apache.struts.util.MessageResourcesFactory createFactory
    [wlappc] SEVERE: MessageResourcesFactory.createFactory
    [wlappc] java.lang.ExceptionInInitializerError
    [wlappc] at org.apache.struts.util.MessageResourcesFactory.createFactory(MessageResourcesFactory.java:192)
    [wlappc] at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:576)
    [wlappc] at org.apache.struts.taglib.html.BaseTag.<clinit>(BaseTag.java:94)
    [wlappc] at java.lang.Class.forName0(Native Method)
    [wlappc] at java.lang.Class.forName(Class.java:140)
    [wlappc] at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.class$(ELBaseTagBeanInfo.java:81)
    [wlappc] at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.getPropertyDescriptors(ELBaseTagBeanInfo.java:81)
    [wlappc] at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:436)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:372)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:207)
    [wlappc] at java.beans.Introspector.getBeanInfo(Introspector.java:193)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.parseTagDD(StandardTagLib.java:1323)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.parseDD(StandardTagLib.java:1261)
    [wlappc] at weblogic.servlet.jsp.StandardTagLib.<init>(StandardTagLib.java:292)
    [wlappc] at weblogic.servlet.jsp.TagLibHelper.loadTagLib(TagLibHelper.java:314)
    [wlappc] at weblogic.servlet.jsp.JspLexer.loadTagLib(JspLexer.java:145)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE_BODY(JspLexer.java:5015)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE(JspLexer.java:4853)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mDIRECTIVE(JspLexer.java:4699)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mSTANDARD_THING(JspLexer.java:2094)
    [wlappc] at weblogic.servlet.jsp.JspLexer.mTOKEN(JspLexer.java:1880)
    [wlappc] at weblogic.servlet.jsp.JspLexer.nextToken(JspLexer.java:1753)
    [wlappc] at weblogic.servlet.jsp.JspLexer.parse(JspLexer.java:963)
    [wlappc] at weblogic.servlet.jsp.JspParser.doit(JspParser.java:106)
    [wlappc] at weblogic.servlet.jsp.JspParser.parse(JspParser.java:230)
    [wlappc] at weblogic.servlet.jsp.Jsp2Java.outputs(Jsp2Java.java:125)
    [wlappc] at weblogic.utils.compiler.CodeGenerator.generate(CodeGenerator.java:258)
    [wlappc] at weblogic.jspc.runJspc(jspc.java:550)
    [wlappc] at weblogic.jspc.runJspc(jspc.java:437)
    [wlappc] at weblogic.servlet.jsp.JspcInvoker.compile(JspcInvoker.java:163)
    [wlappc] at weblogic.appc.compileWAR(appc.java:859)
    [wlappc] at weblogic.appc.compileModules(appc.java:650)
    [wlappc] at weblogic.appc.compileEAR(appc.java:733)
    [wlappc] at weblogic.appc.compileInput(appc.java:458)
    [wlappc] at weblogic.appc.runBody(appc.java:184)
    [wlappc] at weblogic.utils.compiler.Tool.run(Tool.java:146)
    [wlappc] at weblogic.utils.compiler.Tool.run(Tool.java:103)
    [wlappc] at weblogic.appc.main(appc.java:1028)
    [wlappc] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [wlappc] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [wlappc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [wlappc] at java.lang.reflect.Method.invoke(Method.java:324)
    [wlappc] at weblogic.ant.taskdefs.j2ee.CompilerTask.invokeMain(CompilerTask.java:278)
    [wlappc] at weblogic.ant.taskdefs.j2ee.Appc.execute(Appc.java:179)
    [wlappc] at org.apache.tools.ant.Task.perform(Task.java:341)
    [wlappc] at org.apache.tools.ant.Target.execute(Target.java:309)
    [wlappc] at org.apache.tools.ant.Target.performTasks(Target.java:336)
    [wlappc] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
    [wlappc] at org.apache.tools.ant.Project.executeTargets(Project.java:1255)
    [wlappc] at org.apache.tools.ant.Main.runBuild(Main.java:609)
    [wlappc] at org.apache.tools.ant.Main.start(Main.java:196)
    [wlappc] at org.apache.tools.ant.Main.main(Main.java:235)
    [wlappc] Caused by: java.lang.NullPointerException
    [wlappc] at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:577)
    [wlappc] at org.apache.struts.util.RequestUtils.<clinit>(RequestUtils.java:134)
    [wlappc] ... 52 more
    BUILD FAILED
    file:C:/My Sources/WWLEar/wwlear/build.xml:128: weblogic.utils.compiler.ToolFailureException: [J2EE:160119]Appc is unable to process the file 'C:\My Builds\WWL\build'. The following error occurred:
    java.lang.ExceptionInInitializerError
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:140)
    at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.class$(ELBaseTagBeanInfo.java:81)
    at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.getPropertyDescriptors(ELBaseTagBeanInfo.java:81)
    at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:436)
    at java.beans.Introspector.getBeanInfo(Introspector.java:372)
    at java.beans.Introspector.getBeanInfo(Introspector.java:207)
    at java.beans.Introspector.getBeanInfo(Introspector.java:193)
    at weblogic.servlet.jsp.StandardTagLib.parseTagDD(StandardTagLib.java:1323)
    at weblogic.servlet.jsp.StandardTagLib.parseDD(StandardTagLib.java:1261)
    at weblogic.servlet.jsp.StandardTagLib.<init>(StandardTagLib.java:292)
    at weblogic.servlet.jsp.TagLibHelper.loadTagLib(TagLibHelper.java:314)
    at weblogic.servlet.jsp.JspLexer.loadTagLib(JspLexer.java:145)
    at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE_BODY(JspLexer.java:5015)
    at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE(JspLexer.java:4853)
    at weblogic.servlet.jsp.JspLexer.mDIRECTIVE(JspLexer.java:4699)
    at weblogic.servlet.jsp.JspLexer.mSTANDARD_THING(JspLexer.java:2094)
    at weblogic.servlet.jsp.JspLexer.mTOKEN(JspLexer.java:1880)
    at weblogic.servlet.jsp.JspLexer.nextToken(JspLexer.java:1753)
    at weblogic.servlet.jsp.JspLexer.parse(JspLexer.java:963)
    at weblogic.servlet.jsp.JspParser.doit(JspParser.java:106)
    at weblogic.servlet.jsp.JspParser.parse(JspParser.java:230)
    at weblogic.servlet.jsp.Jsp2Java.outputs(Jsp2Java.java:125)
    at weblogic.utils.compiler.CodeGenerator.generate(CodeGenerator.java:258)
    at weblogic.jspc.runJspc(jspc.java:550)
    at weblogic.jspc.runJspc(jspc.java:437)
    at weblogic.servlet.jsp.JspcInvoker.compile(JspcInvoker.java:163)
    at weblogic.appc.compileWAR(appc.java:859)
    at weblogic.appc.compileModules(appc.java:650)
    at weblogic.appc.compileEAR(appc.java:733)
    at weblogic.appc.compileInput(appc.java:458)
    at weblogic.appc.runBody(appc.java:184)
    at weblogic.utils.compiler.Tool.run(Tool.java:146)
    at weblogic.utils.compiler.Tool.run(Tool.java:103)
    at weblogic.appc.main(appc.java:1028)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:324)
    at weblogic.ant.taskdefs.j2ee.CompilerTask.invokeMain(CompilerTask.java:278)
    at weblogic.ant.taskdefs.j2ee.Appc.execute(Appc.java:179)
    at org.apache.tools.ant.Task.perform(Task.java:341)
    at org.apache.tools.ant.Target.execute(Target.java:309)
    at org.apache.tools.ant.Target.performTasks(Target.java:336)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1255)
    at org.apache.tools.ant.Main.runBuild(Main.java:609)
    at org.apache.tools.ant.Main.start(Main.java:196)
    at org.apache.tools.ant.Main.main(Main.java:235)
    Caused by: java.lang.NullPointerException
    at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:577)
    at org.apache.struts.taglib.html.BaseTag.<clinit>(BaseTag.java:94)
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    [java.lang.ExceptionInInitializerError]
    Total time: 42 seconds

    Hi Rob,
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    <BEA-101047>[ServletContext(id=20164970,name=tracer,context-path=/tracer)] classfile up-to-date for JSP /webdatagrid/layouts/default/customize.jsp>
    ####<Sep 2, 2004 2:05:26 PM EDT> <Info> <HTTP> <nyeqshu2> <sit1tracerweb> <ExecuteThread: '3' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <>
    <BEA-101047> <[ServletContext(id=20164970,name=tracer,context-path=/tracer)] checking /webdatagrid/layouts/default/exceldownload.jsp:>
    ####<Sep 2, 2004 2:05:30 PM EDT> <Error> <Deployer> <nyeqshu2> <sit1tracerweb> <ExecuteThread: '3' for queue: 'weblogic.kernel.System'> <<WLS Kernel>>
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    <BEA-149201> <Failed to complete the deployment task with ID 0 for the application tracer-webapp-application-uncontrolled.
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    at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:577)
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    at java.lang.Class.forName(Class.java:140)
    at org.apache.strutsel.taglib.html.ELBaseTagBeanInfo.class$(ELBaseTagBeanInfo.java:81)
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    at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:436)
    at java.beans.Introspector.getBeanInfo(Introspector.java:372)
    at java.beans.Introspector.getBeanInfo(Introspector.java:207)
    at java.beans.Introspector.getBeanInfo(Introspector.java:193)
    at weblogic.servlet.jsp.StandardTagLib.parseTagDD(StandardTagLib.java:1323)
    at weblogic.servlet.jsp.StandardTagLib.parseDD(StandardTagLib.java:1261)
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    at weblogic.servlet.jsp.JspLexer.mTAGLIB_DIRECTIVE(JspLexer.java:4853)
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    at weblogic.servlet.jsp.JspLexer.mSTANDARD_THING(JspLexer.java:2094)
    at weblogic.servlet.jsp.JspLexer.mTOKEN(JspLexer.java:1880)
    at weblogic.servlet.jsp.JspLexer.nextToken(JspLexer.java:1753)
    at weblogic.servlet.jsp.JspLexer.parse(JspLexer.java:963)
    at weblogic.servlet.jsp.JspParser.doit(JspParser.java:106)
    at weblogic.servlet.jsp.JspParser.parse(JspParser.java:230)
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    at weblogic.servlet.jsp.Precompiler.compileOne(Precompiler.java:191)
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    at weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:565)
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    >
    ####<Sep 2, 2004 2:37:29 PM EDT> <Info> <Deployer> <nyeqshu2> <sit1tracerweb> <ExecuteThread: '2' for queue: 'weblogic.kernel.System'> <<WLS Kernel>>
    <>
    <BEA-149059> <Module tracer of application tracer-webapp-application-1_6_3_510 is transitioning from unprepared to prepared on server sit1tracerweb
    .>
    ####<Sep 2, 2004 2:37:39 PM EDT> <Debug> <HTTP> <nyeqshu2> <sit1tracerweb> <ExecuteThread: '2' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <>
    ####<Sep 2, 2004 2:37:39 PM EDT> <Debug> <HTTP> <nyeqshu2> <sit1tracerweb> <ExecuteThread: '2' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <>
    <BEA-101211> <tracer-webapp-application-1_6_3_510:tracer Precompiling JSPs at startup with JSP config [JspConfig: verbose=true,packagePrefix=jsp_servl
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    led=false,printNulls=true,jspServlet=null].>
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    Julien De Santis
    CGI Group

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    AJ

  • ServletContext Vs Properties file

    Dear Friends,
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    or is there any better way of doing?
    1. Reading from the Properties file everytime required. (So for each user the Properties file have to be accessed)
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    I think the best way would be to read the property
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    If I understand correctly, Read the Properties file once and store the Key Value pairs in a Hashtable then maintain this Hashtable in ServletContext? Is this correct?
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  • Changing values in a properties file

    Hi,
    I'm working in a Struts environment and I am trying to open a .properties file in my WEB-INF/classes/ (*.properties) directory and allow the user to change those values and write them back.
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                      key = key.trim();
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             I then change the values depending on their keys, but it is after this step I am unsure how perform the write back.
    Thanks,

    A ResourceBundle is a read-only object. It doesn't provide any methods for updating. If you want to allow your users to update the data, the code will have to update the underlying properties file. This also is impossible if your application server doesn't expand the application but runs it from a WAR or EAR archive.
    [Edit] And even at that, allowing users to update properties files in a multi-user environment is risky -- if two users update the file at the same time, it's easy to lose one of the updates.

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