io.undertow.websockets.jsr.SessionContainer Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.websockets.jsr;
import javax.websocket.Session;
import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author Stuart Douglas
*/
public class SessionContainer {
private Runnable doneTask;
private volatile int waiterCount;
private final Set openSessions = Collections.newSetFromMap(new ConcurrentHashMap());
public Set getOpenSessions() {
return Collections.unmodifiableSet(openSessions);
}
public void addOpenSession(Session session) {
synchronized (this) {
openSessions.add(session);
}
}
public void removeOpenSession(Session session) {
Runnable task = null;
synchronized (this) {
openSessions.remove(session);
if (waiterCount > 0 && openSessions.isEmpty()) {
notifyAll();
}
if(doneTask != null) {
task = doneTask;
doneTask = null;
}
}
if(task != null) {
task.run();
}
}
public void awaitClose(long timeout) {
synchronized (this) {
if(openSessions.isEmpty()) {
return;
}
waiterCount++;
long end = System.currentTimeMillis() + timeout;
try {
while (System.currentTimeMillis() < end) {
wait(end - System.currentTimeMillis());
}
} catch (InterruptedException e) {
//ignore
} finally {
waiterCount--;
}
}
}
public void notifyClosed(Runnable done) {
boolean run = false;
synchronized (this) {
if(openSessions.isEmpty()) {
run = true;
} else {
this.doneTask = done;
}
}
if(run) {
done.run();
}
}
}