/**
* Copyright 2012 Nikita Koksharov
*
* 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 com.corundumstudio.socketio;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.corundumstudio.socketio.parser.Packet;
import com.corundumstudio.socketio.parser.PacketType;
import com.corundumstudio.socketio.scheduler.CancelableScheduler;
import com.corundumstudio.socketio.scheduler.SchedulerKey;
import com.corundumstudio.socketio.scheduler.SchedulerKey.Type;
import com.corundumstudio.socketio.transport.BaseClient;
public class HeartbeatHandler implements Disconnectable {
private final Logger log = LoggerFactory.getLogger(getClass());
private final CancelableScheduler scheduler;
private final Configuration configuration;
public HeartbeatHandler(Configuration configuration, CancelableScheduler scheduler) {
this.configuration = configuration;
this.scheduler = scheduler;
}
public void onHeartbeat(final BaseClient client) {
if (!configuration.isHeartbeatsEnabled()) {
return;
}
final SchedulerKey key = new SchedulerKey(Type.HEARBEAT_TIMEOUT, client.getSessionId());
// cancel heartbeat check because the client answered
scheduler.cancel(key);
scheduler.schedule(new Runnable() {
public void run() {
client.send(new Packet(PacketType.HEARTBEAT));
scheduleClientHeartbeatCheck(client, key);
}
}, configuration.getHeartbeatInterval(), TimeUnit.SECONDS);
}
private void scheduleClientHeartbeatCheck(final BaseClient client, SchedulerKey key) {
// cancel previous heartbeat check
scheduler.cancel(key);
scheduler.schedule(key, new Runnable() {
public void run() {
client.disconnect();
log.debug("Client with sessionId: {} disconnected due to heartbeat timeout", client.getSessionId());
}
}, configuration.getHeartbeatTimeout(), TimeUnit.SECONDS);
}
@Override
public void onDisconnect(BaseClient client) {
scheduler.cancel(new SchedulerKey(Type.HEARBEAT_TIMEOUT, client.getSessionId()));
}
}