A technical question for the Spring experts:
In the current implementation of the blocks fw the BlockServlet is a
Spring managed component, but it gets init and destroy methods are
called in the DispatcherServlet. After having fought a little bit more
about it (and experienced some subtle initialization order problem that
I had to hack around), I have realized that it not is such a good idea
to let the DispatcherServlet have any part in the initialization. This
is both from a SoC perspective and from the fact that the
DispatcherServlet doesn't know anything about the dependency graph of
the BlockServlet components.
The conclusion is that all setup of the BlockServlet should be performed
by the Spring container. The natural way to do this seemed for me to let
the BlockServlet implement the Spring interfaces: ServletConfigAware (so
that it get the servlet config that the Spring web context uses) and
InitializingBean and DisposableBean, for actually calling the Servlet
init and destroy methods.
While trying that, the container is unhappy with the ServletConfigAware
and says that it doesn't have any servlet config. Before trying to dig
into exactly what happens, I would like to hear from the Spring experts
(Carsten e.g.) if you have any idea about what I'm missing. Here is the
stack trace:
Embedded error: Cannot invoke listener
[EMAIL PROTECTED]
Cannot satisfy ServletConfigAware for bean
'org.apache.cocoon.ajax.block' without ServletConfig
[INFO]
------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Failure
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:559)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:488)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:458)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at
org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failure
at
org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:296)
at
org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:242)
at
org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:122)
at
org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:160)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:412)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:534)
... 16 more
Caused by: java.lang.RuntimeException: Cannot invoke listener
[EMAIL PROTECTED]
at
org.apache.cocoon.bootstrap.servlet.ShieldingListener.invoke(ShieldingListener.java:181)
at
org.apache.cocoon.bootstrap.servlet.ShieldingListener.contextInitialized(ShieldingListener.java:204)
at
org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:368)
at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:957)
at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:341)
at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:367)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:37)
at
org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:101)
at org.mortbay.jetty.Server.doStart(Server.java:235)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:37)
at
org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:114)
at
org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:285)
... 21 more
Caused by: org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'org.apache.cocoon.ajax.block' defined in
URL
[file:C:/cygwin/usr/local/svn/cocoon-trunk/core/cocoon-webapp/target/cocoon-webapp/WEB-INF/cocoo
n/spring/cocoon-ajax-sample-blockServlet.xml]: Initialization of bean
failed; nested exception is java.lang.IllegalStateException: Cannot
satisfy ServletConfigAware for bean 'org.apache.cocoon.ajax.block'
without ServletConfig
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:442)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:156)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:290)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:348)
at
org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
at
org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
at
org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
at
org.apache.cocoon.bootstrap.servlet.ShieldingListener.invoke(ShieldingListener.java:152)
... 32 more
Caused by: java.lang.IllegalStateException: Cannot satisfy
ServletConfigAware for bean 'org.apache.cocoon.ajax.block' without
ServletConfig
at
org.springframework.web.context.support.ServletContextAwareProcessor.postProcessBeforeInitialization(ServletContextAwareProcessor.java:90)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanF
actory.java:297)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1025)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:420)
... 43 more
