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Struts - tiles

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posted 20 years ago

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Hi,
I am trying to use tiles in my jsp's , but I am getting the following error when I try to access the jsp.
javax.servlet.jsp.JspException: Error - tag.getAsString : component context is not defined. Check tag syntax
at org.apache.struts.taglib.tiles.GetAttributeTag.doEndTag(GetAttributeTag.java:198)
at jsp_servlet._jsp.__cpitemplate._jspService(__cpitemplate.java:158)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:446)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6350)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
Does anybody know what this error means?? Any help will be really appreciated.
Thanks.

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

ravindra janapreddy

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posted 20 years ago

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Hi Sanny
It would be easier to determine the problem area if you can post the code.
Thanks
Ravi

SCEA, SCBCD, SCWCD, SCJD, SCJP

Sany Bel

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posted 20 years ago

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Hi,
Here is my struts-config file
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">


<struts-config>


<action-mappings>
<action path="/viewInstruments"
type="xxx.ViewInstrumentsAction">
<forward name="viewInstruments" path="cpi.template"/>
</action>
</action-mappings>

<message-resources parameter="ApplicationResources" null="false"/>
<plug-in className="org.apache.struts.tiles.TilesPlugin" >
<set-property property="definitions-config"
value="/WEB-INF/tiles-defs.xml" />
<set-property property="moduleAware" value="true" />
</plug-in>
</struts-config>
The following is my

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

Sany Bel

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posted 20 years ago

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I am sorry I had hit enter by mistake in my previous mail.
Here is my struts-defs.xml
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE tiles-definitions PUBLIC
"-//Apache Software Foundation//DTD Tiles Configuration 1.1//EN"
"http://jakarta.apache.org/struts/dtds/tiles-config_1_1.dtd">

<tiles-definitions>




<definition name="cpi.template" path="/jsp/CPITemplate.jsp">
<put name="title" value="CPI Pricing" />
<put name="header" value="/jsp/Header.jsp" />
<put name="navigation" value="/jsp/Navigation.jsp" />
<put name="footer" value="/jsp/Footer.jsp" />
<put name="body" value="/jsp/DefaultBody.jsp" />
</definition>

</tiles-definitions>
Here is my jsp that uses tiles
<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>
<%-- Layout Tiles
This layout create a html page with <header> and <body> tags. It render
a header, left menu, body and footer tile.
@param title String use in page title
@param header Header tile (jsp url or definition name)
@param menu Menu
@param body Body
@param footer Footer
--%>
<HTML>
<HEAD>
<link rel=stylesheet href="<%=request.getContextPath()%>/css/stylesheet.css" type="text/css">
<title><tiles:getAsString name="title"/></title>

</HEAD>
<%--
<body bgcolor="#ffffff" text="#000000" link="#023264" alink="#023264" vlink="#023264">
<table border="0" width="100%" cellspacing="5">
<tr>
<td colspan="2"><tiles:insert attribute="header" /></td>
</tr>
<tr>
<td width="140" valign="top">
<tiles:insert attribute="navigation"/>
</td>
<td valign="top" align="left">
<tiles:insert attribute="body" />
</td>
</tr>
<tr>
<td colspan="2">
<tiles:insert attribute="footer" />
</td>
</tr>
</table>
</body>
--%>
</html>
It's failing right at title. I've commented out all the other stuff. I am not sure what is wrong. Can you tell me if I am missing anything.

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

Marc Peabody

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posted 20 years ago

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the tile name should START with a '.'


<definition name=".cpitemplate" path="/jsp/CPITemplate.jsp">
<put name="title" value="${title}" />
<put name="header" value="/jsp/Header.jsp" />
<put name="navigation" value="/jsp/Navigation.jsp" />
<put name="footer" value="/jsp/Footer.jsp" />
<put name="body" value="${content}" />
</definition>

<definition name=".cpiPricing" extends=".cpitemplate">
<put name="title" value="CPI Pricing"/>
<put name="body" value="jsp/cpiPricing.jsp"/>
</definition>
Have Struts forward to the path .cpiPricing

A good workman is known by his tools.

Sany Bel

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posted 20 years ago

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I remember reading that. But I have an example application that runs fine without the ".". It's one of the example application that you get when you download struts 1.1. Also, when I try to restart the server (weblogic 8.1) I am ocassionally getting the following error:
java.lang.NoClassDefFoundError: org/apache/commons/collections/FastHashMap$KeySe
t
at org.apache.commons.collections.FastHashMap.keySet(Unknown Source)
at org.apache.struts.action.ActionServlet.destroyDataSources(ActionServl
et.java:769)
at org.apache.struts.action.ActionServlet.destroy(ActionServlet.java:431
)
at weblogic.servlet.internal.ServletStubImpl$ServletDestroyAction.run(Se
rvletStubImpl.java:1029)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
dSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:
118)
at weblogic.servlet.internal.ServletStubImpl.destroyServlet(ServletStubI
mpl.java:583)
at weblogic.servlet.internal.ServletStubImpl.destroyServlet(ServletStubI
mpl.java:610)
at weblogic.servlet.internal.ServletStubImpl.destroyServlet(ServletStubI
mpl.java:595)
at weblogic.servlet.internal.WebAppServletContext.destroyServlets(WebApp
ServletContext.java:5803)
at weblogic.servlet.internal.WebAppServletContext.destroy(WebAppServletC
ontext.java:5683)
at weblogic.servlet.internal.ServletContextManager.removeContext(Servlet
ContextManager.java:188)
at weblogic.servlet.internal.HttpServer.unloadWebApp(HttpServer.java:740
)
at weblogic.servlet.internal.WebAppModule.destroyContexts(WebAppModule.j
ava:767)
at weblogic.servlet.internal.WebAppModule.rollback(WebAppModule.java:745
)
at weblogic.j2ee.J2EEApplicationContainer.rollbackModule(J2EEApplication
Container.java:3057)
at weblogic.j2ee.J2EEApplicationContainer.rectifyClassLoaders(J2EEApplic
Looks like tiles is not gonna work for me

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

Marc Peabody

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posted 20 years ago

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To quote the Struts site:

lib/commons-*.jar - These JAR files contain packages from the Jakarta Commons project that are utilized within Struts itself. When you assemble a Struts-based application, you will need to copy these files to the WEB-INF/lib directory.
lib/struts.jar - This JAR file contains all of the Java classes included in Struts. It should be copied into the WEB-INF/lib directory of your web application. WARNING - If you are going to be hosting multiple Struts based applications on the same servlet container, you will be tempted to place the struts.jar file into the shared repository supported by your container. Be advised that this will like cause you to encounter ClassNotFoundException problems unless all of your application classes are stored in the shared repository.

A good workman is known by his tools.

Sany Bel

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posted 20 years ago

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I had two war files in the applications directory. I deleted one of them and tried to restart the server a couple of times. Looks like the ClassNotFound error is gone. But, I am still getting the tag error.

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

Marc Peabody

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Why is your tiles-defs.xml named struts-defs.xml???

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Sany Bel

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I am sorry but it is named tiles-defs.xml

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

Sany Bel

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posted 20 years ago

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hmm!!, I finally got this to work. But, I had to go through the action to view thw jsp. Can't we directly go to the jsp? like can't we use jsp name in the url rather than using action name? I had to do the following in my action class:
ComponentContext context = ComponentContext.getContext( request );
if( context == null )
{ // Not found, create a context
ComponentContext tileContext = new ComponentContext( );
ComponentContext.setContext( tileContext, request);
}
return (mapping.findForward("viewInstruments"));
}
Is this how it should work?
Also, I am stillg getting the ClassNotFound error. Can't we use war files to deploy the application?
Please help

--------------<br />Sany Bel<br />SCJP 1.4, SCBCD

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