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/*
* Copyright 2012 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.model;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;
import org.traccar.helper.AdvancedConnection;
import org.traccar.helper.Log;
import org.traccar.helper.NamedParameterStatement;
/**
* Database abstraction class
*/
public class DatabaseDataManager implements DataManager {
public DatabaseDataManager(Properties properties)
throws ClassNotFoundException, SQLException {
initDatabase(properties);
}
/**
* Database statements
*/
private NamedParameterStatement queryGetDevices;
private NamedParameterStatement queryAddDevice;
private NamedParameterStatement queryUpdateDevice;
private NamedParameterStatement queryRemoveDevice;
private NamedParameterStatement queryGetPositions;
private NamedParameterStatement queryAddPosition;
/**
* Initialize database
*/
private void initDatabase(Properties properties)
throws ClassNotFoundException, SQLException {
// Load driver
String driver = properties.getProperty("database.driver");
if (driver != null) {
Class.forName(driver);
}
// Refresh delay
String refreshDelay = properties.getProperty("database.refreshDelay");
if (refreshDelay != null) {
devicesRefreshDelay = Long.valueOf(refreshDelay) * 1000;
} else {
devicesRefreshDelay = new Long(300) * 1000; // Magic number
}
// Connect database
String url = properties.getProperty("database.url");
String user = properties.getProperty("database.user");
String password = properties.getProperty("database.password");
AdvancedConnection connection = new AdvancedConnection(url, user, password);
// Load statements from configuration
String query;
query = properties.getProperty("database.selectDevice");
if (query != null) {
queryGetDevices = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.insertDevice");
if (query != null) {
queryAddDevice = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.updateDevice");
if (query != null) {
queryUpdateDevice = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.deleteDevice");
if (query != null) {
queryRemoveDevice = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.selectPosition");
if (query != null) {
queryGetPositions = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.insertPosition");
if (query != null) {
queryAddPosition = new NamedParameterStatement(connection, query);
}
// Create database schema
query = properties.getProperty("database.initialize");
if (query != null) try {
NamedParameterStatement initializeQuery = new NamedParameterStatement(connection, query);
initializeQuery.prepare();
initializeQuery.executeUpdate();
} catch (Exception error) {
Log.warning(error.getMessage());
}
}
public synchronized List<Device> getDevices() throws SQLException {
List<Device> deviceList = new LinkedList();
queryGetDevices.prepare();
ResultSet result = queryGetDevices.executeQuery();
while (result.next()) {
Device device = new Device();
device.setId(result.getLong("id"));
device.setImei(result.getString("imei"));
deviceList.add(device);
}
return deviceList;
}
public synchronized void addDevice(Device device) throws SQLException {
queryAddDevice.prepare();
queryAddDevice.setString("imei", device.getImei());
queryAddDevice.executeUpdate();
// Find generated id
ResultSet result = queryAddDevice.getGeneratedKeys();
if (result.next()) {
device.setId(result.getLong(1));
}
devices = null;
}
public synchronized void updateDevice(Device device) throws SQLException {
queryUpdateDevice.prepare();
queryUpdateDevice.setLong("id", device.getId());
queryUpdateDevice.setString("imei", device.getImei());
queryUpdateDevice.executeUpdate();
devices = null;
}
public synchronized void removeDevice(Device device) throws SQLException {
queryRemoveDevice.prepare();
queryRemoveDevice.setLong("id", device.getId());
queryRemoveDevice.executeUpdate();
devices = null;
}
/**
* Devices cache
*/
private Map devices;
private Calendar devicesLastUpdate;
private Long devicesRefreshDelay;
public Device getDeviceByImei(String imei) throws SQLException {
if ((devices == null) || (Calendar.getInstance().getTimeInMillis() - devicesLastUpdate.getTimeInMillis() > devicesRefreshDelay)) {
devices = new HashMap();
for (Device device: getDevices()) {
devices.put(device.getImei(), device);
}
devicesLastUpdate = Calendar.getInstance();
}
return (Device) devices.get(imei);
}
public synchronized List<Position> getPositions(Long deviceId) throws SQLException {
List<Position> positionList = new LinkedList();
queryGetPositions.prepare();
queryGetPositions.setLong("device_id", deviceId);
ResultSet result = queryGetPositions.executeQuery();
while (result.next()) {
// TODO: include other parameters
Position position = new Position();
position.setDeviceId(result.getLong("device_id"));
position.setTime(result.getTimestamp("time"));
position.setValid(result.getBoolean("valid"));
position.setLatitude(result.getDouble("latitude"));
position.setLongitude(result.getDouble("longitude"));
position.setSpeed(result.getDouble("speed"));
position.setCourse(result.getDouble("course"));
position.setPower(result.getDouble("power"));
positionList.add(position);
}
return positionList;
}
public synchronized void addPosition(Position position) throws SQLException {
queryAddPosition.prepare();
queryAddPosition.setLong("device_id", position.getDeviceId());
queryAddPosition.setTimestamp("time", position.getTime());
queryAddPosition.setBoolean("valid", position.getValid());
queryAddPosition.setDouble("altitude", position.getAltitude());
queryAddPosition.setDouble("latitude", position.getLatitude());
queryAddPosition.setDouble("longitude", position.getLongitude());
queryAddPosition.setDouble("speed", position.getSpeed());
queryAddPosition.setDouble("course", position.getCourse());
queryAddPosition.setDouble("power", position.getPower());
queryAddPosition.setString("extended_info", position.getExtendedInfo());
queryAddPosition.executeUpdate();
// TODO: probably return row id
}
}
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