/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, 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.jboss.as.ejb3.deployment;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.jboss.as.ejb3.logging.EjbLogger;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
/**
* Repository for information about deployed modules. This includes information on all the deployed EJB's in the module
*
* @author Stuart Douglas
*/
public class DeploymentRepository implements Service<DeploymentRepository> {
public static final ServiceName SERVICE_NAME = ServiceName.JBOSS.append("ee", "deploymentRepository");
/**
* All deployed modules. This is a copy on write map that is updated infrequently and read often.
*/
private volatile Map<DeploymentModuleIdentifier, DeploymentHolder> modules;
private final List<DeploymentRepositoryListener> listeners = new ArrayList<DeploymentRepositoryListener>();
/**
* Keeps track of whether the repository is suspended or not
*/
private volatile boolean suspended = false;
@Override
public void start(StartContext context) throws StartException {
modules = Collections.emptyMap();
}
@Override
public void stop(StopContext context) {
modules = null;
}
@Override
public DeploymentRepository getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
public void add(DeploymentModuleIdentifier identifier, ModuleDeployment deployment) {
final List<DeploymentRepositoryListener> listeners;
final boolean suspended;
synchronized (this) {
final Map<DeploymentModuleIdentifier, DeploymentHolder> modules = new HashMap<DeploymentModuleIdentifier, DeploymentHolder>(this.modules);
modules.put(identifier, new DeploymentHolder(deployment));
this.modules = Collections.unmodifiableMap(modules);
listeners = new ArrayList<DeploymentRepositoryListener>(this.listeners);
suspended = this.suspended;
}
for (final DeploymentRepositoryListener listener : listeners) {
try {
listener.deploymentAvailable(identifier, deployment);
if (suspended) {
listener.deploymentSuspended(identifier);
}
} catch (Throwable t) {
EjbLogger.DEPLOYMENT_LOGGER.deploymentAddListenerException(t);
}
}
}
public boolean startDeployment(DeploymentModuleIdentifier identifier) {
DeploymentHolder deployment;
final List<DeploymentRepositoryListener> listeners;
synchronized (this) {
deployment = modules.get(identifier);
if (deployment == null) return false;
deployment.started = true;
listeners = new ArrayList<DeploymentRepositoryListener>(this.listeners);
}
for (final DeploymentRepositoryListener listener : listeners) {
try {
listener.deploymentStarted(identifier, deployment.deployment);
} catch (Throwable t) {
EjbLogger.DEPLOYMENT_LOGGER.deploymentAddListenerException(t);
}
}
return true;
}
public void addListener(final DeploymentRepositoryListener listener) {
synchronized (this) {
listeners.add(listener);
}
listener.listenerAdded(this);
}
public synchronized void removeListener(final DeploymentRepositoryListener listener) {
listeners.remove(listener);
}
public void remove(DeploymentModuleIdentifier identifier) {
final List<DeploymentRepositoryListener> listeners;
synchronized (this) {
final Map<DeploymentModuleIdentifier, DeploymentHolder> modules = new HashMap<DeploymentModuleIdentifier, DeploymentHolder>(this.modules);
modules.remove(identifier);
this.modules = Collections.unmodifiableMap(modules);
listeners = new ArrayList<DeploymentRepositoryListener>(this.listeners);
}
for (final DeploymentRepositoryListener listener : listeners) {
try {
listener.deploymentRemoved(identifier);
} catch (Throwable t) {
EjbLogger.DEPLOYMENT_LOGGER.deploymentRemoveListenerException(t);
}
}
}
public void suspend() {
final List<DeploymentRepositoryListener> listeners;
final Set<DeploymentModuleIdentifier> moduleIdentifiers;
synchronized (this) {
moduleIdentifiers = new HashSet<>(this.modules.keySet());
listeners = new ArrayList<>(this.listeners);
suspended = true;
}
for (final DeploymentRepositoryListener listener : listeners) {
for (DeploymentModuleIdentifier moduleIdentifier : moduleIdentifiers)
try {
listener.deploymentSuspended(moduleIdentifier);
} catch (Throwable t) {
EjbLogger.DEPLOYMENT_LOGGER.deploymentAddListenerException(t);
}
}
}
public void resume() {
final List<DeploymentRepositoryListener> listeners;
final Set<DeploymentModuleIdentifier> moduleIdentifiers;
synchronized (this) {
moduleIdentifiers = new HashSet<>(this.modules.keySet());
listeners = new ArrayList<>(this.listeners);
suspended = false;
}
for (final DeploymentRepositoryListener listener : listeners) {
for (DeploymentModuleIdentifier moduleIdentifier : moduleIdentifiers)
try {
listener.deploymentResumed(moduleIdentifier);
} catch (Throwable t) {
EjbLogger.DEPLOYMENT_LOGGER.deploymentAddListenerException(t);
}
}
}
/**
* Returns all the deployments. These deployments may not be in a started state, i.e. not all components might be ready to receive invocations.
* @return All the deployments
*/
public Map<DeploymentModuleIdentifier, ModuleDeployment> getModules() {
Map<DeploymentModuleIdentifier, ModuleDeployment> modules = new HashMap<DeploymentModuleIdentifier, ModuleDeployment>();
for(Map.Entry<DeploymentModuleIdentifier, DeploymentHolder> entry : this.modules.entrySet()) {
modules.put(entry.getKey(), entry.getValue().deployment);
}
return modules;
}
/**
* Returns all the deployments that are in a started state, i.e. all components are ready to receive invocations.
* @return All the started deployments
*/
public Map<DeploymentModuleIdentifier, ModuleDeployment> getStartedModules() {
Map<DeploymentModuleIdentifier, ModuleDeployment> modules = new HashMap<DeploymentModuleIdentifier, ModuleDeployment>();
for(Map.Entry<DeploymentModuleIdentifier, DeploymentHolder> entry : this.modules.entrySet()) {
if(entry.getValue().started) {
modules.put(entry.getKey(), entry.getValue().deployment);
}
}
return modules;
}
private class DeploymentHolder {
final ModuleDeployment deployment;
volatile boolean started = false;
private DeploymentHolder(ModuleDeployment deployment) {
this.deployment = deployment;
}
}
}