s:cache throws NullPointer
mike82 Apr 22, 2009 10:46 AMI try to put seam/jboss cache into my project, but at the beginning I got problem for which I can't find solution.
I try to use s:cache to cache page fragment:
<s:cache key="header_links" region="header_fragments">
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.aboutUs}</s:link>
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.contact}</s:link>
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.rules}</s:link>
</s:cache>
I have copied treecache.xml from blog-example to my app and added into components.xml following (after seam reference):
<cache:jboss-cache-provider configuration="treecache.xml" />
I tried to put treecache.xml to almost every directory of EAR hoping that's the case - nope.
I got following error when trying to display page containg s:cache tag:
09:53:55,750 ERROR [STDERR] 2009-04-22 09:53:55 com.sun.facelets.FaceletViewHand
ler handleRenderException
SEVERE: Error Rendering View[/home.xhtml]
java.lang.NullPointerException
at org.jboss.seam.ui.renderkit.CacheRendererBase.doEncodeChildren(CacheR
endererBase.java:39)
at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.j
ava:92)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:942)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.jav
a:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWra
pper.java:108)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.j
ava:196)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePha
se.java:109)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:83)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFil
ter.java:380)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.jav
a:51)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:182)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:432)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC
onnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
6)
at java.lang.Thread.run(Thread.java:619)
I try to use s:cache to cache page fragment:
<s:cache key="header_links" region="header_fragments">
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.aboutUs}</s:link>
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.contact}</s:link>
<s:link styleClass="header_links" view="/home.xhtml">#{bundle_header.rules}</s:link>
</s:cache>
I have copied treecache.xml from blog-example to my app and added into components.xml following (after seam reference):
<cache:jboss-cache-provider configuration="treecache.xml" />
I tried to put treecache.xml to almost every directory of EAR hoping that's the case - nope.
I got following error when trying to display page containg s:cache tag:
09:53:55,750 ERROR [STDERR] 2009-04-22 09:53:55 com.sun.facelets.FaceletViewHand
ler handleRenderException
SEVERE: Error Rendering View[/home.xhtml]
java.lang.NullPointerException
at org.jboss.seam.ui.renderkit.CacheRendererBase.doEncodeChildren(CacheR
endererBase.java:39)
at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.j
ava:92)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(
HtmlBasicRenderer.java:234)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRendere
r.java:178)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRe
nderer.java:126)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:837)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:936)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:942)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.jav
a:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWra
pper.java:108)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.j
ava:196)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePha
se.java:109)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:83)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFil
ter.java:380)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.jav
a:51)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter
.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:182)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:432)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC
onnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
6)
at java.lang.Thread.run(Thread.java:619)