/*
* 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.server.session;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
import java.util.concurrent.CopyOnWriteArrayList;
import io.undertow.server.HttpServerExchange;
/**
* Utility class that maintains the session listeners.
*
*
* @author Stuart Douglas
*/
public class SessionListeners {
private final List<SessionListener> sessionListeners = new CopyOnWriteArrayList<>();
public void addSessionListener(final SessionListener listener) {
this.sessionListeners.add(listener);
}
public boolean removeSessionListener(final SessionListener listener) {
return this.sessionListeners.remove(listener);
}
public void clear() {
this.sessionListeners.clear();
}
public void sessionCreated(final Session session, final HttpServerExchange exchange) {
for (SessionListener listener : sessionListeners) {
listener.sessionCreated(session, exchange);
}
}
public void sessionDestroyed(final Session session, final HttpServerExchange exchange, SessionListener.SessionDestroyedReason reason) {
// We need to create our own snapshot to safely iterate over a concurrent list in reverse
List<SessionListener> listeners = new ArrayList<>(sessionListeners);
ListIterator<SessionListener> iterator = listeners.listIterator(listeners.size());
while (iterator.hasPrevious()) {
iterator.previous().sessionDestroyed(session, exchange, reason);
}
}
public void attributeAdded(final Session session, final String name, final Object value) {
for (SessionListener listener : sessionListeners) {
listener.attributeAdded(session, name, value);
}
}
public void attributeUpdated(final Session session, final String name, final Object newValue, final Object oldValue) {
for (SessionListener listener : sessionListeners) {
listener.attributeUpdated(session, name, newValue, oldValue);
}
}
public void attributeRemoved(final Session session, final String name, final Object oldValue) {
for (SessionListener listener : sessionListeners) {
listener.attributeRemoved(session, name, oldValue);
}
}
public void sessionIdChanged(final Session session, final String oldSessionId) {
for (SessionListener listener : sessionListeners) {
listener.sessionIdChanged(session, oldSessionId);
}
}
}