/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.teiid.services;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.teiid.Replicated;
import org.teiid.deployers.EventDistributorImpl;
import org.teiid.deployers.VDBRepository;
import org.teiid.dqp.internal.process.DQPCore;
import org.teiid.events.EventDistributor;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.query.ObjectReplicator;
import org.teiid.runtime.RuntimePlugin;
public abstract class AbstractEventDistributorFactoryService implements InternalEventDistributorFactory {
private EventDistributor replicatableEventDistributor;
private EventDistributor eventDistributorProxy;
public InternalEventDistributorFactory getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
protected abstract VDBRepository getVdbRepository();
protected abstract ObjectReplicator getObjectReplicator();
protected abstract DQPCore getDQPCore();
public void start() {
final EventDistributor ed = new EventDistributorImpl() {
@Override
public VDBRepository getVdbRepository() {
return AbstractEventDistributorFactoryService.this.getVdbRepository();
}
@Override
public DQPCore getDQPCore() {
return AbstractEventDistributorFactoryService.this.getDQPCore();
}
};
ObjectReplicator objectReplicator = getObjectReplicator();
// this instance is by use of teiid internally; only invokes the remote instances
if (objectReplicator != null) {
try {
this.replicatableEventDistributor = objectReplicator.replicate("$TEIID_ED$", EventDistributor.class, ed, 0); //$NON-NLS-1$
} catch (Exception e) {
LogManager.logError(LogConstants.CTX_RUNTIME, e, RuntimePlugin.Util.gs(RuntimePlugin.Event.TEIID40088, this));
}
}
// for external client to call. invokes local instance and remote ones too.
this.eventDistributorProxy = (EventDistributor)Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(), new Class[] {EventDistributor.class}, new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
Replicated annotation = method.getAnnotation(Replicated.class);
Object result = null;
try {
if (replicatableEventDistributor == null || (annotation != null && annotation.remoteOnly())) {
result = method.invoke(ed, args);
}
if (replicatableEventDistributor != null) {
result = method.invoke(replicatableEventDistributor, args);
}
} catch (InvocationTargetException e) {
throw e.getTargetException();
}
return result;
}
});
}
public void stop() {
ObjectReplicator objectReplicator = getObjectReplicator();
if (objectReplicator != null && this.replicatableEventDistributor != null) {
objectReplicator.stop(this.replicatableEventDistributor);
this.replicatableEventDistributor = null;
}
}
@Override
public EventDistributor getReplicatedEventDistributor() {
return replicatableEventDistributor;
}
@Override
public EventDistributor getEventDistributor() {
return eventDistributorProxy;
}
}