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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.*;
import java.util.*;
import org.traccar.helper.AdvancedConnection;
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 queryAddPosition;
private NamedParameterStatement queryUpdateLatestPosition;
/**
* 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.insertPosition");
if (query != null) {
queryAddPosition = new NamedParameterStatement(connection, query);
}
query = properties.getProperty("database.updateLatestPosition");
if (query != null) {
queryUpdateLatestPosition = new NamedParameterStatement(connection, query);
}
}
@Override
public synchronized List<Device> getDevices() throws SQLException {
List<Device> deviceList = new LinkedList<Device>();
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;
}
/**
* Devices cache
*/
private Map<String, Device> devices;
private Calendar devicesLastUpdate;
private Long devicesRefreshDelay;
@Override
public Device getDeviceByImei(String imei) throws SQLException {
if ((devices == null) || (Calendar.getInstance().getTimeInMillis() - devicesLastUpdate.getTimeInMillis() > devicesRefreshDelay)) {
List<Device> list = getDevices();
devices = new HashMap<String, Device>();
for (Device device: list) {
devices.put(device.getImei(), device);
}
devicesLastUpdate = Calendar.getInstance();
}
return devices.get(imei);
}
@Override
public synchronized Long addPosition(Position position) throws SQLException {
queryAddPosition.prepare(Statement.RETURN_GENERATED_KEYS);
queryAddPosition.setLong("id", position.getId());
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("address", position.getAddress());
queryAddPosition.setString("extended_info", position.getExtendedInfo());
queryAddPosition.executeUpdate();
ResultSet result = queryAddPosition.getGeneratedKeys();
if (result != null && result.next()) {
return result.getLong(1);
}
return null;
}
@Override
public void updateLatestPosition(Long deviceId, Long positionId) throws SQLException {
queryUpdateLatestPosition.prepare();
queryUpdateLatestPosition.setLong("device_id", deviceId);
queryUpdateLatestPosition.setLong("id", positionId);
queryUpdateLatestPosition.executeUpdate();
}
}
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