/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, 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.wildfly.mod_cluster.undertow;
import static java.security.AccessController.doPrivileged;
import io.undertow.servlet.api.Deployment;
import java.security.PrivilegedAction;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import org.jboss.as.server.suspend.ServerActivity;
import org.jboss.as.server.suspend.ServerActivityCallback;
import org.jboss.logging.Logger;
import org.jboss.modcluster.container.Connector;
import org.jboss.modcluster.container.ContainerEventHandler;
import org.jboss.modcluster.container.Context;
import org.jboss.modcluster.container.Engine;
import org.jboss.modcluster.container.Server;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StopContext;
import org.jboss.threads.JBossThreadFactory;
import org.wildfly.extension.undertow.Host;
import org.wildfly.extension.undertow.UndertowEventListener;
import org.wildfly.extension.undertow.UndertowService;
/**
* Builds a service exposing an Undertow subsystem adapter to mod_cluster's ContainerEventHandler.
*
* @author Paul Ferraro
*/
public class UndertowEventHandlerAdapter implements UndertowEventListener, Service<Void>, Runnable, ServerActivity {
// No logger interface for this module and no reason to create one for this class only
private static final Logger log = Logger.getLogger("org.jboss.mod_cluster.undertow");
private final UndertowEventHandlerAdapterConfiguration configuration;
private final Set<Context> contexts = new HashSet<>();
private volatile ScheduledExecutorService executor;
private volatile Server server;
private volatile Connector connector;
public UndertowEventHandlerAdapter(UndertowEventHandlerAdapterConfiguration configuration) {
this.configuration = configuration;
}
@Override
public Void getValue() {
return null;
}
@Override
public void start(StartContext context) {
UndertowService service = this.configuration.getUndertowService();
ContainerEventHandler eventHandler = this.configuration.getContainerEventHandler();
this.connector = new UndertowConnector(this.configuration.getListener());
this.server = new UndertowServer(service, this.connector);
// Register ourselves as a listener to the container events
service.registerListener(this);
// Initialize mod_cluster and start it now
eventHandler.init(this.server);
eventHandler.start(this.server);
// Start the periodic STATUS thread
ThreadGroup group = new ThreadGroup(UndertowEventHandlerAdapter.class.getSimpleName());
ThreadFactory factory = doPrivileged(new PrivilegedAction<ThreadFactory>() {
@Override
public ThreadFactory run() {
return new JBossThreadFactory(group, Boolean.FALSE, null, "%G - %t", null, null);
}
});
this.executor = Executors.newScheduledThreadPool(1, factory);
this.executor.scheduleWithFixedDelay(this, 0, this.configuration.getStatusInterval().toMillis(), TimeUnit.MILLISECONDS);
this.configuration.getSuspendController().registerActivity(this);
}
@Override
public void stop(StopContext context) {
this.configuration.getSuspendController().unRegisterActivity(this);
this.configuration.getUndertowService().unregisterListener(this);
this.executor.shutdownNow();
try {
this.executor.awaitTermination(this.configuration.getStatusInterval().toMillis(), TimeUnit.MILLISECONDS);
} catch (InterruptedException ignore) {
// Move on.
}
this.configuration.getContainerEventHandler().stop(this.server);
}
private Context createContext(Deployment deployment, Host host) {
return new UndertowContext(deployment, new UndertowHost(host, new UndertowEngine(host.getServer().getValue(), this.configuration.getUndertowService(), this.connector)));
}
private Context createContext(String contextPath, Host host) {
return new LocationContext(contextPath, new UndertowHost(host, new UndertowEngine(host.getServer().getValue(), this.configuration.getUndertowService(), this.connector)));
}
private synchronized void onStart(Context context) {
ContainerEventHandler handler = this.configuration.getContainerEventHandler();
handler.add(context);
// TODO break into onDeploymentAdd once implemented in Undertow
handler.start(context);
this.contexts.add(context);
}
private synchronized void onStop(Context context) {
ContainerEventHandler handler = this.configuration.getContainerEventHandler();
handler.stop(context);
// TODO break into onDeploymentRemove once implemented in Undertow
handler.remove(context);
this.contexts.remove(context);
}
@Override
public void onDeploymentStart(Deployment deployment, Host host) {
this.onStart(this.createContext(deployment, host));
}
@Override
public void onDeploymentStop(Deployment deployment, Host host) {
this.onStop(this.createContext(deployment, host));
}
@Override
public void onDeploymentStart(String contextPath, Host host) {
this.onStart(this.createContext(contextPath, host));
}
@Override
public void onDeploymentStop(String contextPath, Host host) {
this.onStop(this.createContext(contextPath, host));
}
@Override
public void run() {
try {
for (Engine engine : this.server.getEngines()) {
this.configuration.getContainerEventHandler().status(engine);
}
} catch (Throwable e) {
log.error(e.getMessage(), e);
}
}
@Override
public synchronized void preSuspend(ServerActivityCallback listener) {
try {
for (Context context : this.contexts) {
this.configuration.getContainerEventHandler().stop(context);
}
} finally {
listener.done();
}
}
@Override
public void suspended(ServerActivityCallback listener) {
listener.done();
}
@Override
public void resume() {
for (Context context : this.contexts) {
this.configuration.getContainerEventHandler().start(context);
}
}
}