Trying hard to debug things without having to understand all the ins and
outs of Avalon and Cocoon, I think I may have tracked problems down to
something.
In SitemapComponentSelector.java, the select method is as follows:
> public Component select(Object hint) throws ComponentException {
> Component component = null;
>
> try {
> component = super.select(hint);
> } catch (ComponentException ce) {
> if (this.parentSelector != null) {
> component = this.parentSelector.select(hint);
> } else {
> throw ce;
> }
> }
>
> return component;
> }
this.parentSelector.select(hint) is called if super.select(hint) throws a
ComponentException, but if super.select() is using a
PoolableComponentHandler, it is going to prefer to expand its pool than
return with an exception, so the second call is not going to happen.
Now I really haven't had time to get my head round what parents are and
what the difference is between a Handler a Manager a Factory, etc., but if
I'm guessing correctly, then may be this means that in a sitemap situation
like:
> <map:match pattern="news-*.html">
> <map:aggregate element="aggregate">
> <map:part src="cocoon:/general_info.xml" element="general" />
> <map:part src="cocoon:/select/news/{1}.xml" element="news" />
> <!-- <map:part src="cocoon:/images-news.xml" element="images-news"
> /> -->
> </map:aggregate>
> <map:transform src="transform/specific/prepare_news_page.xslt" />
> <map:transform src="transform/general/docbook_article.xslt" />
> <map:transform src="transform/specific/site_look.xslt" />
> <map:serialize/>
> </map:match>
...
> <map:match pattern="select/*/*.xml">
> <map:generate type="serverpages"
> src="cocoon:/create-data_select_xsp/{1}.xml">
> <map:parameter name="idtext" value="{2}" />
> </map:generate>
> <map:serialize type="xml" />
> </map:match>
>
A request for "new-test_news.html" is going to request
"cocoon:/select/news/test_news.xml" which, during its processing is going
to look for JaxpTransformer components from its own pool before that of
its parent. Consequently, on every call it is going to create a whole new
pool and set of transformers.
I really am guessing a lot here, and my terminology is probably all wrong,
but I'm really keen to sort this one out!
Here's a stack dump of an occurence of this issue corresponding to the
example above. The stack dump is not due to any error, its just a dump on
entry to the JaxpParser.newDocument() call:
> [1] org.apache.cocoon.components.parser.JaxpParser.newDocument
> (JaxpParser.java:79)
> [2]
> org.apache.cocoon.components.browser.BrowserImpl.createDocumentForBrowserInfo
> (BrowserImpl.java:393)
> [3] org.apache.cocoon.components.browser.BrowserImpl.compose
> (BrowserImpl.java:156)
> [4]
> org.apache.avalon.excalibur.component.DefaultComponentFactory.newInstance
> (DefaultComponentFactory.java:98)
> [5] org.apache.avalon.excalibur.component.DefaultComponentHandler.get
> (DefaultComponentHandler.java:92)
> [6]
> org.apache.avalon.excalibur.component.ExcaliburComponentManager.lookup
> (ExcaliburComponentManager.java:266)
> [7]
> org.apache.avalon.excalibur.component.ExcaliburComponentManager.lookup
> (ExcaliburComponentManager.java:223)
> [8] org.apache.cocoon.transformation.TraxTransformer.compose
> (TraxTransformer.java:334)
> [9]
> org.apache.avalon.excalibur.component.DefaultComponentFactory.newInstance
> (DefaultComponentFactory.java:98)
> [10] org.apache.avalon.excalibur.pool.AbstractPool.newPoolable
> (AbstractPool.java:70)
> [11] org.apache.avalon.excalibur.pool.SoftResourceLimitingPool.grow
> (SoftResourceLimitingPool.java:82)
> [12] org.apache.avalon.excalibur.pool.DefaultPool.get (DefaultPool.java:
> 125)
> [13] org.apache.avalon.excalibur.component.PoolableComponentHandler.get
> (PoolableComponentHandler.java:117)
> [14]
> org.apache.avalon.excalibur.component.ExcaliburComponentSelector.select
> (ExcaliburComponentSelector.java:246)
> [15] org.apache.cocoon.sitemap.SitemapComponentSelector.select
> (SitemapComponentSelector.java:49)
> [16]
> org.apache.cocoon.components.pipeline.AbstractEventPipeline.addTransformer
> (AbstractEventPipeline.java:95)
> [17]
> org.apache.cocoon.components.pipeline.CachingEventPipeline.addTransformer
> (CachingEventPipeline.java:93)
> [18] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.wildcardMatchN334
> (sitemap_xmap.java:3108)
> [19] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.process (sitemap_xmap.java:
> 1467)
> [20] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.process (sitemap_xmap.java:
> 1346)
> [21] org.apache.cocoon.components.source.SitemapSource.refresh
> (SitemapSource.java:247)
> [22] org.apache.cocoon.components.source.SitemapSource.<init>
> (SitemapSource.java:145)
> [23] org.apache.cocoon.components.source.CocoonSourceFactory.getSource
> (CocoonSourceFactory.java:53)
> [24] org.apache.cocoon.components.source.SourceHandlerImpl.getSource
> (SourceHandlerImpl.java:132)
> [25] org.apache.cocoon.environment.AbstractEnvironment.resolve
> (AbstractEnvironment.java:229)
> [26] org.apache.cocoon.environment.wrapper.EnvironmentWrapper.resolve
> (EnvironmentWrapper.java:222)
> [27]
> org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.load
> (ProgramGeneratorImpl.java:141)
> [28] org.apache.cocoon.generation.ServerPagesGenerator.setup
> (ServerPagesGenerator.java:153)
> [29]
> org.apache.cocoon.components.pipeline.AbstractEventPipeline.setupPipeline
> (AbstractEventPipeline.java:146)
> [30] org.apache.cocoon.components.pipeline.CachingEventPipeline.setup
> (CachingEventPipeline.java:246)
> [31]
> org.apache.cocoon.components.pipeline.CachingEventPipeline.generateKey
> (CachingEventPipeline.java:108)
> [32] org.apache.cocoon.components.source.SitemapSource.refresh
> (SitemapSource.java:259)
> [33] org.apache.cocoon.components.source.SitemapSource.<init>
> (SitemapSource.java:145)
> [34] org.apache.cocoon.components.source.CocoonSourceFactory.getSource
> (CocoonSourceFactory.java:53)
> [35] org.apache.cocoon.components.source.SourceHandlerImpl.getSource
> (SourceHandlerImpl.java:132)
> [36] org.apache.cocoon.environment.AbstractEnvironment.resolve
> (AbstractEnvironment.java:229)
> [37] org.apache.cocoon.sitemap.ContentAggregator.setup
> (ContentAggregator.java:284)
> [38]
> org.apache.cocoon.components.pipeline.AbstractEventPipeline.setupPipeline
> (AbstractEventPipeline.java:146)
> [39] org.apache.cocoon.components.pipeline.CachingEventPipeline.setup
> (CachingEventPipeline.java:246)
> [40]
> org.apache.cocoon.components.pipeline.CachingEventPipeline.generateKey
> (CachingEventPipeline.java:108)
> [41]
> org.apache.cocoon.components.pipeline.CachingStreamPipeline.process
> (CachingStreamPipeline.java:279)
> [42] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.wildcardMatchN1DD
> (sitemap_xmap.java:2057)
> [43] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.process (sitemap_xmap.java:
> 1387)
> [44] org.apache.cocoon.www.file_.Users.stuart.Documents.Clients.Adolos.
> Adolos_Website.Development.webapp.sitemap_xmap.process (sitemap_xmap.java:
> 1330)
> [45] org.apache.cocoon.sitemap.Handler.process (Handler.java:160)
> [46] org.apache.cocoon.sitemap.Manager.invoke (Manager.java:103)
> [47] org.apache.cocoon.Cocoon.process (Cocoon.java:423)
> [48] org.apache.cocoon.servlet.CocoonServlet.service
> (CocoonServlet.java:507)
> [49] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
> [50] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
> (ApplicationFilterChain.java:247)
> [51] org.apache.catalina.core.ApplicationFilterChain.doFilter
> (ApplicationFilterChain.java:193)
> [52] org.apache.catalina.core.StandardWrapperValve.invoke
> (StandardWrapperValve.java:243)
> [53] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:566)
> [54] org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.
> java:472)
> [55] org.apache.catalina.core.ContainerBase.invoke (ContainerBase.java:
> 943)
> [56] org.apache.catalina.core.StandardContextValve.invoke
> (StandardContextValve.java:219)
> [57] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:566)
> [58] org.apache.catalina.valves.CertificatesValve.invoke
> (CertificatesValve.java:246)
> [59] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:564)
> [60] org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.
> java:472)
> [61] org.apache.catalina.core.ContainerBase.invoke (ContainerBase.java:
> 943)
> [62] org.apache.catalina.core.StandardContext.invoke
> (StandardContext.java:2251)
> [63] org.apache.catalina.core.StandardHostValve.invoke
> (StandardHostValve.java:164)
> [64] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:566)
> [65] org.apache.catalina.valves.AccessLogValve.invoke
> (AccessLogValve.java:446)
> [66] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:564)
> [67] org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.
> java:472)
> [68] org.apache.catalina.core.ContainerBase.invoke (ContainerBase.java:
> 943)
> [69] org.apache.catalina.core.StandardEngineValve.invoke
> (StandardEngineValve.java:163)
> [70] org.apache.catalina.core.StandardPipeline.invokeNext
> (StandardPipeline.java:566)
> [71] org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.
> java:472)
> [72] org.apache.catalina.core.ContainerBase.invoke (ContainerBase.java:
> 943)
> [73] org.apache.catalina.connector.http.HttpProcessor.process
> (HttpProcessor.java:984)
> [74] org.apache.catalina.connector.http.HttpProcessor.run
> (HttpProcessor.java:1074)
> [75] java.lang.Thread.run (Thread.java:496)
Thoughts?
Stuart.
-------------------------------------------------------------------------
Stuart Roebuck [EMAIL PROTECTED]
Lead Developer Java, XML, MacOS X, XP, etc.
ADOLOS <http://www.adolos.com/>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, email: [EMAIL PROTECTED]
