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/*
* Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 org.traccar.database;
import java.net.SocketAddress;
import java.sql.SQLException;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.util.Timeout;
import org.jboss.netty.util.TimerTask;
import org.traccar.Context;
import org.traccar.GlobalTimer;
import org.traccar.Protocol;
import org.traccar.helper.Log;
import org.traccar.model.Device;
import org.traccar.model.Position;
public class ConnectionManager {
private static final long DEFAULT_TIMEOUT = 600;
private final long deviceTimeout;
private final Map<Long, ActiveDevice> activeDevices = new HashMap<>();
private final Map<Long, Position> positions = new HashMap<>();
private final Map<Long, Set<UpdateListener>> listeners = new HashMap<>();
private final Map<Long, Timeout> timeouts = new HashMap<>();
public ConnectionManager(DataManager dataManager) {
deviceTimeout = Context.getConfig().getLong("status.timeout", DEFAULT_TIMEOUT) * 1000;
if (dataManager != null) {
try {
for (Position position : dataManager.getLatestPositions()) {
positions.put(position.getDeviceId(), position);
}
} catch (SQLException error) {
Log.warning(error);
}
}
}
public void addActiveDevice(long deviceId, Protocol protocol, Channel channel, SocketAddress remoteAddress) {
activeDevices.put(deviceId, new ActiveDevice(deviceId, protocol, channel, remoteAddress));
}
public void removeActiveDevice(Channel channel) {
for (ActiveDevice activeDevice : activeDevices.values()) {
if (activeDevice.getChannel() == channel) {
updateDevice(activeDevice.getDeviceId(), Device.STATUS_OFFLINE, null);
activeDevices.remove(activeDevice.getDeviceId());
break;
}
}
}
public ActiveDevice getActiveDevice(long deviceId) {
return activeDevices.get(deviceId);
}
public synchronized void updateDevice(final long deviceId, String status, Date time) {
Device device = Context.getIdentityManager().getDeviceById(deviceId);
if (device == null) {
return;
}
device.setStatus(status);
if (time != null) {
device.setLastUpdate(time);
}
Timeout timeout = timeouts.remove(deviceId);
if (timeout != null) {
timeout.cancel();
}
if (status.equals(Device.STATUS_ONLINE)) {
timeouts.put(deviceId, GlobalTimer.getTimer().newTimeout(new TimerTask() {
@Override
public void run(Timeout timeout) throws Exception {
if (!timeout.isCancelled()) {
updateDevice(deviceId, Device.STATUS_UNKNOWN, null);
}
}
}, deviceTimeout, TimeUnit.MILLISECONDS));
}
try {
Context.getDataManager().updateDeviceStatus(device);
} catch (SQLException error) {
Log.warning(error);
}
if (listeners.containsKey(deviceId)) {
for (UpdateListener listener : listeners.get(deviceId)) {
listener.onUpdateDevice(device);
}
}
}
public synchronized void updatePosition(Position position) {
long deviceId = position.getDeviceId();
positions.put(deviceId, position);
if (listeners.containsKey(deviceId)) {
for (UpdateListener listener : listeners.get(deviceId)) {
listener.onUpdatePosition(position);
}
}
}
public Position getLastPosition(long deviceId) {
return positions.get(deviceId);
}
public synchronized Collection<Position> getInitialState(Collection<Long> devices) {
List<Position> result = new LinkedList<>();
for (long device : devices) {
if (positions.containsKey(device)) {
result.add(positions.get(device));
}
}
return result;
}
public interface UpdateListener {
void onUpdateDevice(Device device);
void onUpdatePosition(Position position);
}
public void addListener(Collection<Long> devices, UpdateListener listener) {
for (long deviceId : devices) {
addListener(deviceId, listener);
}
}
public synchronized void addListener(long deviceId, UpdateListener listener) {
if (!listeners.containsKey(deviceId)) {
listeners.put(deviceId, new HashSet<UpdateListener>());
}
listeners.get(deviceId).add(listener);
}
public void removeListener(Collection<Long> devices, UpdateListener listener) {
for (long deviceId : devices) {
removeListener(deviceId, listener);
}
}
public synchronized void removeListener(long deviceId, UpdateListener listener) {
if (!listeners.containsKey(deviceId)) {
listeners.put(deviceId, new HashSet<UpdateListener>());
}
listeners.get(deviceId).remove(listener);
}
}
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