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/*
* Copyright 2015 - 2022 Anton Tananaev (anton@traccar.org)
*
* 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.api;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.WebSocketAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.Context;
import org.traccar.session.ConnectionManager;
import org.traccar.model.Device;
import org.traccar.model.Event;
import org.traccar.model.Position;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public class AsyncSocket extends WebSocketAdapter implements ConnectionManager.UpdateListener {
private static final Logger LOGGER = LoggerFactory.getLogger(AsyncSocket.class);
private static final String KEY_DEVICES = "devices";
private static final String KEY_POSITIONS = "positions";
private static final String KEY_EVENTS = "events";
private final ObjectMapper objectMapper;
private final ConnectionManager connectionManager;
private final long userId;
public AsyncSocket(ObjectMapper objectMapper, ConnectionManager connectionManager, long userId) {
this.objectMapper = objectMapper;
this.connectionManager = connectionManager;
this.userId = userId;
}
@Override
public void onWebSocketConnect(Session session) {
super.onWebSocketConnect(session);
Map<String, Collection<?>> data = new HashMap<>();
data.put(KEY_POSITIONS, Context.getDeviceManager().getInitialState(userId));
sendData(data);
connectionManager.addListener(userId, this);
}
@Override
public void onWebSocketClose(int statusCode, String reason) {
super.onWebSocketClose(statusCode, reason);
connectionManager.removeListener(userId, this);
}
@Override
public void onKeepalive() {
sendData(new HashMap<>());
}
@Override
public void onUpdateDevice(Device device) {
Map<String, Collection<?>> data = new HashMap<>();
data.put(KEY_DEVICES, Collections.singletonList(device));
sendData(data);
}
@Override
public void onUpdatePosition(Position position) {
Map<String, Collection<?>> data = new HashMap<>();
data.put(KEY_POSITIONS, Collections.singletonList(position));
sendData(data);
}
@Override
public void onUpdateEvent(Event event) {
Map<String, Collection<?>> data = new HashMap<>();
data.put(KEY_EVENTS, Collections.singletonList(event));
sendData(data);
}
private void sendData(Map<String, Collection<?>> data) {
if (isConnected()) {
try {
getRemote().sendString(objectMapper.writeValueAsString(data), null);
} catch (JsonProcessingException e) {
LOGGER.warn("Socket JSON formatting error", e);
}
}
}
}
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