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package org.glassfish.jersey.server.internal.monitoring;
import javax.inject.Singleton;
import org.glassfish.jersey.internal.inject.AbstractBinder;
import org.glassfish.jersey.server.monitoring.ApplicationEvent;
import org.glassfish.jersey.server.monitoring.ApplicationEventListener;
import org.glassfish.jersey.server.spi.Container;
import org.glassfish.jersey.server.spi.ContainerLifecycleListener;
/**
* Container listener that listens to container events and trigger the {@link ApplicationEvent application events}
* and call them on supplied {@link org.glassfish.jersey.server.monitoring.RequestEventListener}.
*
* This listener must be registered as a standard provider in Jersey runtime.
*
* @author Miroslav Fuksa
*/
public final class MonitoringContainerListener implements ContainerLifecycleListener {
private volatile ApplicationEvent initFinishedEvent;
private volatile ApplicationEventListener listener;
/**
* Initializes the instance with listener that must be called and initialization event. If this method
* is not called then events cannot not be triggered which might be needed when no
* {@link ApplicationEventListener} is registered in Jersey runtime.
*
* @param listener Listener that should be called.
* @param initFinishedEvent Event of type {@link ApplicationEvent.Type#INITIALIZATION_START}.
*/
public void init(ApplicationEventListener listener, ApplicationEvent initFinishedEvent) {
this.listener = listener;
this.initFinishedEvent = initFinishedEvent;
}
@Override
public void onStartup(Container container) {
if (listener != null) {
listener.onEvent(getApplicationEvent(ApplicationEvent.Type.INITIALIZATION_FINISHED));
}
}
@Override
public void onReload(Container container) {
if (listener != null) {
listener.onEvent(getApplicationEvent(ApplicationEvent.Type.RELOAD_FINISHED));
}
}
private ApplicationEvent getApplicationEvent(ApplicationEvent.Type type) {
return new ApplicationEventImpl(type,
initFinishedEvent.getResourceConfig(), initFinishedEvent.getProviders(),
initFinishedEvent.getRegisteredClasses(), initFinishedEvent.getRegisteredInstances(),
initFinishedEvent.getResourceModel());
}
@Override
public void onShutdown(Container container) {
if (listener != null) {
listener.onEvent(getApplicationEvent(ApplicationEvent.Type.DESTROY_FINISHED));
}
}
/**
* A binder that binds the {@link MonitoringContainerListener}.
*/
public static class Binder extends AbstractBinder {
@Override
protected void configure() {
bindAsContract(MonitoringContainerListener.class)
.to(ContainerLifecycleListener.class).in(Singleton.class);
}
}
}