I have a base class which has a parameter defined. Trying to write the
parameter results in an exeption (see below).
I don't really understand why this is happening, because I expect a
parameter to be writable. I mean, that's the sole purpose of a
parameter, isn't it?
Am I doing it wrong? Is it impossible to define parameters in base classes?
Andy
The base class:
public class BaseSnippet {
@Property @Parameter // also tried it without @Property, same result
private String snippetType;
}
The component that extends BaseSnippet
public class Snippet extends BaseSnippet{
// ...
}
I try to include the component in a page like this:
<t:snippet snippetType="literal:otherOffer" />
The exception is:
2008-12-08 15:25:57,953 ERROR (DefaultRequestExceptionHandler.java:62) -
Processing of request failed with uncaught exception: Ren
der queue error in SetupRender[search/Fewo:includesnippet]: Failure
writing parameter 'snippetType' of component search/Fewo:inclu
desnippet: Binding LiteralBinding[snippetType: otherOffer] is read-only.
org.apache.tapestry5.internal.services.RenderQueueException: Render
queue error in SetupRender[search/Fewo:includesnippet]: Failur
e writing parameter 'snippetType' of component
search/Fewo:includesnippet: Binding LiteralBinding[snippetType:
otherOffer] is read
-only. [at classpath:de/net22/oos/tb/web/pages/search/SearchFewo.tml,
line 143, column 62]
at
org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:84)
at
org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:121)
at
$PageRenderQueue_11e16c07518.render($PageRenderQueue_11e16c07518.java)
at
$PageRenderQueue_11e16c07510.render($PageRenderQueue_11e16c07510.java)
at
org.apache.tapestry5.services.TapestryModule$19.renderMarkup(TapestryModule.java:1200)
at
org.apache.tapestry5.services.TapestryModule$29.renderMarkup(TapestryModule.java:1574)
at
$MarkupRenderer_11e16c0751a.renderMarkup($MarkupRenderer_11e16c0751a.java)
at
org.apache.tapestry5.services.TapestryModule$28.renderMarkup(TapestryModule.java:1555)
at
$MarkupRenderer_11e16c0751a.renderMarkup($MarkupRenderer_11e16c0751a.java)
at
org.apache.tapestry5.services.TapestryModule$27.renderMarkup(TapestryModule.java:1537)
at
$MarkupRenderer_11e16c0751a.renderMarkup($MarkupRenderer_11e16c0751a.java)
at
org.apache.tapestry5.services.TapestryModule$26.renderMarkup(TapestryModule.java:1519)
at
$MarkupRenderer_11e16c0751a.renderMarkup($MarkupRenderer_11e16c0751a.java)
at
org.apache.tapestry5.services.TapestryModule$25.renderMarkup(TapestryModule.java:1489)
at
$MarkupRenderer_11e16c0751a.renderMarkup($MarkupRenderer_11e16c0751a.java)
at
$MarkupRenderer_11e16c07516.renderMarkup($MarkupRenderer_11e16c07516.java)
at
org.apache.tapestry5.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:64)
at
$PageMarkupRenderer_11e16c07514.renderPageMarkup($PageMarkupRenderer_11e16c07514.java)
at
org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:57)
at
$PageResponseRenderer_11e16c074bc.renderPageResponse($PageResponseRenderer_11e16c074bc.java)
at
org.apache.tapestry5.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:59)
at
org.apache.tapestry5.services.TapestryModule$35.handle(TapestryModule.java:1773)
at
$PageRenderRequestHandler_11e16c074bd.handle($PageRenderRequestHandler_11e16c074bd.java)
at
$PageRenderRequestHandler_11e16c074af.handle($PageRenderRequestHandler_11e16c074af.java)
at
org.apache.tapestry5.internal.services.PageRenderDispatcher.process(PageRenderDispatcher.java:92)
at
org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:71)
at $Dispatcher_11e16c074b6.dispatch($Dispatcher_11e16c074b6.java)
at $Dispatcher_11e16c074a8.dispatch($Dispatcher_11e16c074a8.java)
at
org.apache.tapestry5.services.TapestryModule$17.service(TapestryModule.java:1029)
at
org.apache.tapestry5.internal.services.LocalizationFilter.service(LocalizationFilter.java:42)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:621)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:611)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:85)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:93)
at
org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:84)
at
org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:83)
at
org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:106)
at
$RequestHandler_11e16c074a9.service($RequestHandler_11e16c074a9.java)
at
$RequestHandler_11e16c074a0.service($RequestHandler_11e16c074a0.java)
at
org.apache.tapestry5.services.TapestryModule$16.service(TapestryModule.java:1007)
at
org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at
$HttpServletRequestFilter_11e16c0749f.service($HttpServletRequestFilter_11e16c0749f.java)
at
$HttpServletRequestHandler_11e16c074a1.service($HttpServletRequestHandler_11e16c074a1.java)
at
$HttpServletRequestHandler_11e16c0749e.service($HttpServletRequestHandler_11e16c0749e.java)
at
org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:179)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:359)
at
org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)
at
org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.SessionFixationProtectionFilter.doFilterHttp(SessionFixationProtectionFilter.java:67)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:
105)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.rememberme.RememberMeProcessingFilter.doFilterHttp(RememberMeProcessingFilter.java:116)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.doFilterHttp(SecurityContextHolderAwareReq
uestFilter.java:91)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.basicauth.BasicProcessingFilter.doFilterHttp(BasicProcessingFilter.java:173)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:271)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.ui.logout.LogoutFilter.doFilterHttp(LogoutFilter.java:89)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilt
er.java:235)
at
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at
org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:371)
at
org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:174)
at
org.springframework.security.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:99)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:757)
at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:416)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:826)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:523)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:377)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:497)
Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException:
Failure writing parameter 'snippetType' of component search/F
ewo:includesnippet: Binding LiteralBinding[snippetType: otherOffer] is
read-only. [at classpath:de/net22/oos/tb/web/pages/search/S
earchFewo.tml, line 143, column 62]
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:932)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$200(ComponentPageElementImpl.java:50)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13.render(ComponentPageElementImpl.java:499)
at
org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
... 101 more
Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException:
Failure writing parameter 'snippetType' of component search/F
ewo:includesnippet: Binding LiteralBinding[snippetType: otherOffer] is
read-only. [at classpath:de/net22/oos/tb/web/pages/search/S
earchFewo.tml, line 143, column 62]
at
org.apache.tapestry5.internal.structure.InternalComponentResourcesImpl.writeParameter(InternalComponentResourcesImpl.ja
va:340)
at
de.net22.oos.tb.web.base.BaseSnippet._$update_parameter_snippetType(BaseSnippet.java)
at
de.net22.oos.tb.web.base.BaseSnippet.initializeOtherOffer(BaseSnippet.java:145)
at
de.net22.oos.tb.web.base.BaseSnippet.setupRender(BaseSnippet.java:115)
at
de.net22.oos.tb.web.base.BaseSnippet.setupRender(BaseSnippet.java)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$13$1.run(ComponentPageElementImpl.java:495)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:917)
... 104 more
Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException:
Binding LiteralBinding[snippetType: otherOffer] is read-only.
[at classpath:de/net22/oos/tb/web/pages/search/SearchFewo.tml, line
143, column 62]
at
org.apache.tapestry5.internal.bindings.AbstractBinding.set(AbstractBinding.java:45)
at
org.apache.tapestry5.internal.structure.InternalComponentResourcesImpl.writeParameter(InternalComponentResourcesImpl.ja
va:336)
... 110 more
2008-12-08 15:25:58,156 ERROR (PagePoolImpl.java:111) - Page
Page[search/Fewo en] is dirty, and will be discarded (rather than ret
urned to the page pool).
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