/*
* Copyright (C) 2009 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.errai.cdi.server.events;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.Set;
import javax.enterprise.event.Reception;
import javax.enterprise.event.TransactionPhase;
import javax.enterprise.inject.spi.BeforeShutdown;
import javax.enterprise.inject.spi.ObserverMethod;
import org.jboss.errai.bus.client.api.messaging.MessageBus;
import org.jboss.errai.bus.server.util.ServiceParser;
import org.jboss.errai.cdi.server.TypeRegistry;
import org.jboss.errai.enterprise.client.cdi.api.CDI;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Observes CDI {@link javax.enterprise.inject.spi.BeforeShutdown} events and unsubcribes
* previously registered subjects with the {@link org.jboss.errai.bus.client.api.messaging.MessageBus}
*
* @author Heiko Braun <hbraun@redhat.com>
*/
@SuppressWarnings("rawtypes")
public class ShutdownEventObserver implements ObserverMethod {
private static final Logger log = LoggerFactory.getLogger(ShutdownEventObserver.class);
private TypeRegistry managedTypes;
private MessageBus bus;
public ShutdownEventObserver(TypeRegistry managedTypes, MessageBus bus) {
this.managedTypes = managedTypes;
this.bus = bus;
}
@Override
public Class<?> getBeanClass() {
return ShutdownEventObserver.class;
}
@Override
public Type getObservedType() {
return BeforeShutdown.class;
}
@Override
public Set<Annotation> getObservedQualifiers() {
return Collections.emptySet();
}
@Override
public Reception getReception() {
return Reception.ALWAYS;
}
@Override
public TransactionPhase getTransactionPhase() {
return TransactionPhase.IN_PROGRESS;
}
@Override
public void notify(Object o) {
log.info("Shutting down CDI-to-ErraiBus event bridge");
// unsubscribe bean endpoints
for (Class<?> delegateClass : managedTypes.getDelegateClasses()) {
for (ServiceParser svcParser : managedTypes.getDelegateServices(delegateClass)) {
final String subject = svcParser.getServiceName();
log.debug("unsubscribe: " + subject);
bus.unsubscribeAll(subject);
}
}
for (Class<?> rpcIntf : managedTypes.getRemoteInterfaces()) {
final String rpcSubjectName = rpcIntf.getName() + ":RPC";
log.debug("unsubscribe: " + rpcSubjectName);
bus.unsubscribeAll(rpcSubjectName);
}
// unsubscribe event dispatcher endpoint
bus.unsubscribeAll(CDI.SERVER_DISPATCHER_SUBJECT);
}
}