Make sure JCR eventListeners registered via HST Spring beans get their methods invoked with HST webapp classloader

See [hippo-community] PooledSession not visible from class loader.

Following code:

public class DocListener extends GenericEventListener implements EventListenersContainerListener {

private static final Logger log = LoggerFactory.getLogger(DocListener.class);
private Credentials credentials;
private Repository repository;

@Override
public void onEvent(EventIterator events)

{ Session session = repository.login(credentials); }

@Override
public void onEventListenersContainerStarted()

{ // do nothing }

@Override
public void onEventListenersContainerRefreshed() {

}
@Override
public void onEventListenersContainerStopped() { // do nothing }

public void setCredentials(Credentials credentials)

{ this.credentials = credentials; }

public void setRepository(Repository repository)

{ this.repository = repository; }

}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd">
<bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" ref="jcrObservationEventListenerItems" />
<property name="targetMethod" value="add" />
<property name="arguments">
<bean class="org.hippoecm.hst.core.jcr.EventListenerItemImpl">
<property name="noLocal" value="false" />
<property name="nodeAddedEnabled" value="false" />
<property name="nodeRemovedEnabled" value="false" />
<property name="propertyAddedEnabled" value="false" />
<property name="propertyChangedEnabled" value="true" />
<property name="propertyRemovedEnabled" value="false" />
<property name="absolutePath" value="/content/documents" />
<property name="deep" value="true" />
<property name="eventListener">
<bean class="org.onehippo.cms7.listener.DocListener">
<property name="credentials" ref="javax.jcr.Credentials.default" />
<property name="repository" ref="javax.jcr.Repository" />
</bean>
</property>
</bean>
</property>
</bean>
</beans>

fails with the exception below:

[INFO] [talledLocalContainer] 02.06.2015 11:02:03 ERROR ObservationManager [DocListener.onEvent:32]
[INFO] [talledLocalContainer] javax.jcr.RepositoryException: javax.jcr.LoginException: Failed to borrow session from the pool. java.lang.IllegalArgumentException: interface org.hippoecm.hst.core.jcr.pool.PooledSession is not visible from class loader
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.LazyMultipleRepositoryImpl.login(LazyMultipleRepositoryImpl.java:207)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.MultipleRepositoryImpl.login(MultipleRepositoryImpl.java:173)
[INFO] [talledLocalContainer] at org.onehippo.cms7.listener.DocListener.onEvent(DocListener.java:29)
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.observation.EventConsumer.consumeEvents(EventConsumer.java:249)
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.observation.ObservationDispatcher.run(ObservationDispatcher.java:161)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:745)
[INFO] [talledLocalContainer] Caused by: javax.jcr.LoginException: Failed to borrow session from the pool. java.lang.IllegalArgumentException: interface org.hippoecm.hst.core.jcr.pool.PooledSession is not visible from class loader
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository.login(BasicPoolingRepository.java:350)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository.login(BasicPoolingRepository.java:365)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.LazyMultipleRepositoryImpl.login(LazyMultipleRepositoryImpl.java:189)
[INFO] [talledLocalContainer] ... 5 more
[INFO] [talledLocalContainer] Caused by: java.lang.IllegalArgumentException: interface org.hippoecm.hst.core.jcr.pool.PooledSession is not visible from class loader
[INFO] [talledLocalContainer] at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:581)
[INFO] [talledLocalContainer] at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:557)
[INFO] [talledLocalContainer] at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:230)
[INFO] [talledLocalContainer] at java.lang.reflect.WeakCache.get(WeakCache.java:127)
[INFO] [talledLocalContainer] at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:419)
[INFO] [talledLocalContainer] at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:719)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.util.ProxyFactory.createInterceptorProxy(ProxyFactory.java:52)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.PooledSessionDecoratorProxyFactoryImpl.decorate(PooledSessionDecoratorProxyFactoryImpl.java:44)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository$SessionFactory.makeObject(BasicPoolingRepository.java:1123)
[INFO] [talledLocalContainer] at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1148)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository.login(BasicPoolingRepository.java:337)
[INFO] [talledLocalContainer] ... 7 more

Problem is related to ProxyFactory and current class loader from thread which is in case of JCR event listeners the CMS webapp classloader