/*
* Copyright 2012 - 2014 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 com.mchange.v2.c3p0.ComboPooledDataSource;
import java.io.File;
import java.io.StringReader;
import java.net.URL;
import java.net.URLClassLoader;
import java.sql.*;
import java.util.*;
import javax.sql.DataSource;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.traccar.helper.DriverDelegate;
import org.traccar.helper.Log;
import org.traccar.model.Device;
import org.traccar.model.Position;
import org.xml.sax.InputSource;
/**
* Database abstraction class
*/
public class DataManager {
public DataManager(Properties properties) throws Exception {
if (properties != null) {
initDatabase(properties);
// Refresh delay
String refreshDelay = properties.getProperty("database.refreshDelay");
if (refreshDelay != null) {
devicesRefreshDelay = Long.valueOf(refreshDelay) * 1000;
} else {
devicesRefreshDelay = DEFAULT_REFRESH_DELAY * 1000;
}
}
}
private DataSource dataSource;
public DataSource getDataSource() {
return dataSource;
}
/**
* Database statements
*/
private NamedParameterStatement queryGetDevices;
private NamedParameterStatement queryAddPosition;
private NamedParameterStatement queryUpdateLatestPosition;
/**
* Initialize database
*/
private void initDatabase(Properties properties) throws Exception {
// Load driver
String driver = properties.getProperty("database.driver");
if (driver != null) {
String driverFile = properties.getProperty("database.driverFile");
if (driverFile != null) {
URL url = new URL("jar:file:" + new File(driverFile).getAbsolutePath() + "!/");
URLClassLoader cl = new URLClassLoader(new URL[]{url});
Driver d = (Driver) Class.forName(driver, true, cl).newInstance();
DriverManager.registerDriver(new DriverDelegate(d));
} else {
Class.forName(driver);
}
}
// Initialize data source
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(properties.getProperty("database.driver"));
ds.setJdbcUrl(properties.getProperty("database.url"));
ds.setUser(properties.getProperty("database.user"));
ds.setPassword(properties.getProperty("database.password"));
ds.setIdleConnectionTestPeriod(600);
ds.setTestConnectionOnCheckin(true);
dataSource = ds;
// Load statements from configuration
String query;
query = properties.getProperty("database.selectDevice");
if (query != null) {
queryGetDevices = new NamedParameterStatement(query, dataSource);
}
query = properties.getProperty("database.insertPosition");
if (query != null) {
queryAddPosition = new NamedParameterStatement(query, dataSource, Statement.RETURN_GENERATED_KEYS);
}
query = properties.getProperty("database.updateLatestPosition");
if (query != null) {
queryUpdateLatestPosition = new NamedParameterStatement(query, dataSource);
}
}
private final NamedParameterStatement.ResultSetProcessor<Device> deviceResultSetProcessor = new NamedParameterStatement.ResultSetProcessor<Device>() {
@Override
public Device processNextRow(ResultSet rs) throws SQLException {
Device device = new Device();
device.setId(rs.getLong("id"));
device.setImei(rs.getString("imei"));
return device;
}
};
public List<Device> getDevices() throws SQLException {
if (queryGetDevices != null) {
return queryGetDevices.prepare().executeQuery(deviceResultSetProcessor);
} else {
return new LinkedList<Device>();
}
}
/**
* Devices cache
*/
private Map<String, Device> devices;
private Calendar devicesLastUpdate;
private long devicesRefreshDelay;
private static final long DEFAULT_REFRESH_DELAY = 300;
public Device getDeviceByImei(String imei) throws SQLException {
if (devices == null || !devices.containsKey(imei) ||
(Calendar.getInstance().getTimeInMillis() - devicesLastUpdate.getTimeInMillis() > devicesRefreshDelay)) {
devices = new HashMap<String, Device>();
for (Device device : getDevices()) {
devices.put(device.getImei(), device);
}
devicesLastUpdate = Calendar.getInstance();
}
return devices.get(imei);
}
private NamedParameterStatement.ResultSetProcessor<Long> generatedKeysResultSetProcessor = new NamedParameterStatement.ResultSetProcessor<Long>() {
@Override
public Long processNextRow(ResultSet rs) throws SQLException {
return rs.getLong(1);
}
};
public synchronized Long addPosition(Position position) throws SQLException {
if (queryAddPosition != null) {
List<Long> result = assignVariables(queryAddPosition.prepare(), position).executeUpdate(generatedKeysResultSetProcessor);
if (result != null && !result.isEmpty()) {
return result.iterator().next();
}
}
return null;
}
public void updateLatestPosition(Position position, Long positionId) throws SQLException {
if (queryUpdateLatestPosition != null) {
assignVariables(queryUpdateLatestPosition.prepare(), position).setLong("id", positionId).executeUpdate();
}
}
private NamedParameterStatement.Params assignVariables(NamedParameterStatement.Params params, Position position) throws SQLException {
params.setLong("device_id", position.getDeviceId());
params.setTimestamp("time", position.getTime());
params.setBoolean("valid", position.getValid());
params.setDouble("altitude", position.getAltitude());
params.setDouble("latitude", position.getLatitude());
params.setDouble("longitude", position.getLongitude());
params.setDouble("speed", position.getSpeed());
params.setDouble("course", position.getCourse());
params.setString("address", position.getAddress());
params.setString("extended_info", position.getExtendedInfo());
// DELME: Temporary compatibility support
XPath xpath = XPathFactory.newInstance().newXPath();
try {
InputSource source = new InputSource(new StringReader(position.getExtendedInfo()));
String index = xpath.evaluate("/info/index", source);
if (!index.isEmpty()) {
params.setLong("id", Long.valueOf(index));
} else {
params.setLong("id", null);
}
source = new InputSource(new StringReader(position.getExtendedInfo()));
String power = xpath.evaluate("/info/power", source);
if (!power.isEmpty()) {
params.setDouble("power", Double.valueOf(power));
} else {
params.setLong("power", null);
}
} catch (XPathExpressionException e) {
Log.warning("Error in XML: " + position.getExtendedInfo(), e);
params.setLong("id", null);
params.setLong("power", null);
}
return params;
}
}