Tim Kernan wrote:I am now getting NullPointerExceptions on every line of the jsp file where <tiles:insertAttribute name="this_content.jsp/> and all other <tiles: xxxx > usage.
Here is the section of tiles-defs-sml
MainPage2.jsp:
Error:
Thanks for you help.
Tim
Tim, Were you able to solve this java.lang.NullPointerException at org.apache.tiles.template.DefaultAttributeResolver.computeAttribute(DefaultAttributeResolver.java:42) Issue?
I'm working on a GVT project and need to migrate spring,hibernate and quartz. But spring migration demands Tiles 1 to Tiles 2. But I want to stick with Struts 1.x as the volume of Struts 2 migration will be huge.
My ultimate goal is to migrate an application to spring 4.1.4, Hibernate 4.3. But this was resulting to migrate Tiles 1.x to Tiles 2.x. But this intern was creating issues with Struts 1. With the help of Tiles user community, I was able to get the struts-tiles2-1.4.0-SNAPSHOT.jar
library and I'm trying to migrate a small sample application from Struts 1/Tiles 1 to Struts 1/Tiles 2. After making changes according to the suggestions in
https://feima2011.wordpress.com/2011/04/27/struts-1-and-tiles-2-integration/ , I'm getting the following error while running the application in the browser.
If you remember anything how you solved the 6 years back stuff, Please do reply?
Error 500--Internal Server Error
java.lang.NullPointerException
at org.apache.tiles.template.DefaultAttributeResolver.computeAttribute(DefaultAttributeResolver.java:42)
at org.apache.tiles.template.InsertAttributeModel.resolveAttribute(InsertAttributeModel.java:187)
at org.apache.tiles.template.InsertAttributeModel.start(InsertAttributeModel.java:107)
at org.apache.tiles.jsp.taglib.InsertAttributeTag.doTag(InsertAttributeTag.java:306)
at jsp_servlet.__index._jspService(__index.java:93)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
at java.security.AccessController.doPrivileged(Native Method)
at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:324)
at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:460)
at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:163)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3729)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3695)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2285)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2184)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1459)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
In the tiles-defs.xml, I made the changes as below: (PUT changed to put-attribute) (definition path TO definition template) etc
<definition name="baseLayout" template="/baseLayout.jsp">
<put-attribute name="title" value="Tiles Example" />
<put-attribute name="header" value="/header.jsp" />
<put-attribute name="menu" value="/menu.jsp" />
<put-attribute name="body" value="/body.jsp" />
<put-attribute name="footer" value="/footer.jsp" />
</definition>
<definition name="friends" extends="baseLayout">
<put-attribute name="title" value="Friends" />
<put-attribute name="body" value="/friends.jsp" />
</definition>
<definition name="office" extends="baseLayout">
<put-attribute name="title" value="The Office" />
<put-attribute name="body" value="/office.jsp" />
</definition>
In Jsp's I changed the tag <tiles:insert name="header" ignore="true" /> TO <tiles:insertAttribute name="header" ignore="true" />
Also in struts-config file,
<controller processorClass="org.apache.struts.tiles2.TilesRequestProcessor"/>
AND
<plug-in className="org.apache.struts.tiles2.TilesPlugin" >
I do have the following jar in my WEB-INF/lib and classpath
struts-core-1.4.0-SNAPSHOT.jar
struts-tiles2-1.4.0-SNAPSHOT.jar
struts-extras-1.4.0-SNAPSHOT.jar
struts-scripting-1.4.0-SNAPSHOT.jar
struts-taglib-1.4.0-SNAPSHOT.jar
struts-tiles-1.4.0-SNAPSHOT.jar
tiles-api-2.2.1.jar
tiles-jsp-2.2.1.jar
tiles-servlet-2.2.1.jar
tiles-template-2.2.0.jar
log4j-1.2.16.jar
slf4j-api-1.7.7.jar
slf4j-log4j12-1.7.7.jar
jakarta-oro.jar
I have removed the struts.jar earlier, but with and without struts.jar, I'm getting the same error.
Can any friends be a help on this issue? I am unable to attach the ZIP of the application.