Hello,
is it a well known fact that if a ThreadSafe Component owned by an
ExcaliburComponentSelector tries to lookup it's containiner (selector
that is) in a lifecycle method (compose, initialize, start), then it
results in infinite recursion? Am I completely misusing it?
<role shorthand="chained-selector"
name="org.apache.avalon.excalibur.event.EventHandlerChainedSelector"
default-class="org.apache.avalon.excalibur.component.ExcaliburComponentSelector">
<hint shorthand="first-handler" class="test.PassingHandler"/>
<hint shorthand="chained-handler" class="test.Handler1"/>
</role>
<components>
<chained-selector>
<first-handler name="test.PassingHandler"/>
<chained-handler name="test.Handler1"/>
</chained-selector>
</components>
package test;
import org.apache.avalon.excalibur.event.QueueElement;
import org.apache.avalon.framework.component.Component;
import org.apache.avalon.framework.component.Composable;
import org.apache.avalon.framework.component.ComponentException;
import org.apache.avalon.framework.component.ComponentManager;
import org.apache.avalon.excalibur.event.EventHandler;
import org.apache.avalon.framework.component.ComponentSelector;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.avalon.framework.activity.Startable;
public class PassingHandler
extends AbstractSerialEventHandler
implements Component, Composable, ThreadSafe, Startable
{
private EventHandler m_handler;
private ComponentSelector m_selector;
private ComponentManager m_manager;
public void handleEvent(QueueElement event) {
AsyncHandlerSelectorTestCase.addResult(event, this.getClass());
m_handler.handleEvent(event);
}
public void compose (ComponentManager manager)
throws ComponentException
{
m_manager = manager;
}
public void start() throws Exception
{
m_selector =
(ComponentSelector)
m_manager.lookup(EventHandler.class.getName()+"ChainedSelector");
m_handler =
(EventHandler) m_selector.select(Handler1.class.getName());
}
public void stop() throws Exception
{
m_selector.release((Component) m_handler);
m_manager.release(m_selector);
}
}
at test.PassingHandler.start(PassingHandler.java:35)
at
org.apache.avalon.excalibur.component.DefaultComponentFactory.newInstance(DefaultComponentFactory.java:212)
at
org.apache.avalon.excalibur.component.ThreadSafeComponentHandler.initialize(ThreadSafeComponentHandler.java:104)
at
org.apache.avalon.excalibur.component.ExcaliburComponentSelector.addComponent(ExcaliburComponentSelector.java:505)
at
org.apache.avalon.excalibur.component.ExcaliburComponentSelector.configure(ExcaliburComponentSelector.java:348)
at
org.apache.avalon.excalibur.component.DefaultComponentFactory.newInstance(DefaultComponentFactory.java:191)
at
org.apache.avalon.excalibur.component.ThreadSafeComponentHandler.initialize(ThreadSafeComponentHandler.java:104)
at
org.apache.avalon.excalibur.component.ExcaliburComponentManager.lookup(ExcaliburComponentManager.java:347)
at
org.apache.avalon.excalibur.component.DefaultComponentFactory$ComponentManagerProxy.lookup(DefaultComponentFactory.java:319)
at
org.apache.avalon.excalibur.component.DefaultComponentFactory$ComponentManagerProxy.lookup(DefaultComponentFactory.java:319)
at test.PassingHandler.start(PassingHandler.java:35)
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