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/*
* Copyright 2012 - 2016 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;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.socket.DatagramChannel;
import org.traccar.helper.Log;
import org.traccar.model.Device;
import org.traccar.model.Position;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
private final Protocol protocol;
public String getProtocolName() {
return protocol.getName();
}
private DeviceSession channelDeviceSession; // connection-based protocols
private Map<SocketAddress, DeviceSession> addressDeviceSessions = new HashMap<>(); // connectionless protocols
private long findDeviceId(SocketAddress remoteAddress, String... uniqueIds) {
long deviceId = 0;
if (uniqueIds.length > 0) {
try {
for (String uniqueId : uniqueIds) {
if (uniqueId != null) {
Device device = Context.getIdentityManager().getDeviceByUniqueId(uniqueId);
if (device != null) {
deviceId = device.getId();
break;
}
}
}
} catch (Exception e) {
Log.warning(e);
}
if (deviceId == 0) {
StringBuilder message = new StringBuilder("Unknown device -");
for (String uniqueId : uniqueIds) {
message.append(" ").append(uniqueId);
}
if (remoteAddress != null) {
message.append(" (").append(((InetSocketAddress) remoteAddress).getHostString()).append(")");
}
Log.warning(message.toString());
}
}
return deviceId;
}
public DeviceSession getDeviceSession(Channel channel, SocketAddress remoteAddress, String... uniqueIds) {
if (channel instanceof DatagramChannel) {
long deviceId = findDeviceId(remoteAddress, uniqueIds);
DeviceSession deviceSession = addressDeviceSessions.get(remoteAddress);
if (deviceSession != null && (deviceSession.getDeviceId() == deviceId || uniqueIds.length == 0)) {
return deviceSession;
} else if (deviceId != 0) {
deviceSession = new DeviceSession(deviceId);
addressDeviceSessions.put(remoteAddress, deviceSession);
if (Context.getConnectionManager() != null) {
Context.getConnectionManager().addActiveDevice(deviceId, protocol, channel, remoteAddress);
}
return deviceSession;
} else {
return null;
}
} else {
if (channelDeviceSession == null) {
long deviceId = findDeviceId(remoteAddress, uniqueIds);
if (deviceId != 0) {
channelDeviceSession = new DeviceSession(deviceId);
if (Context.getConnectionManager() != null) {
Context.getConnectionManager().addActiveDevice(deviceId, protocol, channel, remoteAddress);
}
}
}
return channelDeviceSession;
}
}
public BaseProtocolDecoder(Protocol protocol) {
this.protocol = protocol;
}
public void getLastLocation(Position position, Date deviceTime) {
if (position.getDeviceId() != 0) {
position.setOutdated(true);
Position last = Context.getIdentityManager().getLastPosition(position.getDeviceId());
if (last != null) {
position.setFixTime(last.getFixTime());
position.setValid(last.getValid());
position.setLatitude(last.getLatitude());
position.setLongitude(last.getLongitude());
position.setAltitude(last.getAltitude());
position.setSpeed(last.getSpeed());
position.setCourse(last.getCourse());
} else {
position.setFixTime(new Date(0));
}
if (deviceTime != null) {
position.setDeviceTime(deviceTime);
} else {
position.setDeviceTime(new Date());
}
}
}
@Override
protected void onMessageEvent(Channel channel, SocketAddress remoteAddress, Object msg) {
if (Context.getStatisticsManager() != null) {
Context.getStatisticsManager().registerMessageReceived();
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession != null) {
Context.getConnectionManager().updateDevice(deviceSession.getDeviceId(), Device.STATUS_ONLINE, new Date());
}
}
@Override
protected Object handleEmptyMessage(Channel channel, SocketAddress remoteAddress, Object msg) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (Context.getConfig().getBoolean("database.saveEmpty") && deviceSession != null) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
return position;
} else {
return null;
}
}
}
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