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package org.traccar.database;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.traccar.Config;
import org.traccar.Context;
import org.traccar.helper.Log;
import org.traccar.model.Device;
import org.traccar.model.Position;
public class DeviceManager implements IdentityManager {
private final Config config;
private final DataManager dataManager;
private final long dataRefreshDelay;
private final ReadWriteLock devicesLock = new ReentrantReadWriteLock();
private final Map<Long, Device> devicesById = new HashMap<>();
private final Map<String, Device> devicesByUniqueId = new HashMap<>();
private long devicesLastUpdate;
private final Map<Long, Position> positions = new ConcurrentHashMap<>();
public DeviceManager(DataManager dataManager) {
this.dataManager = dataManager;
this.config = Context.getConfig();
dataRefreshDelay = config.getLong("database.refreshDelay", DataManager.DEFAULT_REFRESH_DELAY) * 1000;
if (dataManager != null) {
try {
for (Position position : dataManager.getLatestPositions()) {
positions.put(position.getDeviceId(), position);
}
} catch (SQLException error) {
Log.warning(error);
}
}
}
private void updateDeviceCache(boolean force) throws SQLException {
boolean needWrite;
devicesLock.readLock().lock();
try {
needWrite = force || System.currentTimeMillis() - devicesLastUpdate > dataRefreshDelay;
} finally {
devicesLock.readLock().unlock();
}
if (needWrite) {
devicesLock.writeLock().lock();
try {
if (force || System.currentTimeMillis() - devicesLastUpdate > dataRefreshDelay) {
devicesById.clear();
devicesByUniqueId.clear();
GeofenceManager geofenceManager = Context.getGeofenceManager();
for (Device device : dataManager.getAllDevices()) {
devicesById.put(device.getId(), device);
devicesByUniqueId.put(device.getUniqueId(), device);
if (geofenceManager != null) {
Position lastPosition = getLastPosition(device.getId());
if (lastPosition != null) {
device.setGeofenceIds(geofenceManager.getCurrentDeviceGeofences(lastPosition));
}
}
}
devicesLastUpdate = System.currentTimeMillis();
}
} finally {
devicesLock.writeLock().unlock();
}
}
}
@Override
public Device getDeviceById(long id) {
boolean forceUpdate;
devicesLock.readLock().lock();
try {
forceUpdate = !devicesById.containsKey(id);
} finally {
devicesLock.readLock().unlock();
}
try {
updateDeviceCache(forceUpdate);
} catch (SQLException e) {
Log.warning(e);
}
devicesLock.readLock().lock();
try {
return devicesById.get(id);
} finally {
devicesLock.readLock().unlock();
}
}
@Override
public Device getDeviceByUniqueId(String uniqueId) throws SQLException {
boolean forceUpdate;
devicesLock.readLock().lock();
try {
forceUpdate = !devicesByUniqueId.containsKey(uniqueId) && !config.getBoolean("database.ignoreUnknown");
} finally {
devicesLock.readLock().unlock();
}
updateDeviceCache(forceUpdate);
devicesLock.readLock().lock();
try {
return devicesByUniqueId.get(uniqueId);
} finally {
devicesLock.readLock().unlock();
}
}
public Collection<Device> getAllDevices() {
boolean forceUpdate;
devicesLock.readLock().lock();
try {
forceUpdate = devicesById.isEmpty();
} finally {
devicesLock.readLock().unlock();
}
try {
updateDeviceCache(forceUpdate);
} catch (SQLException e) {
Log.warning(e);
}
devicesLock.readLock().lock();
try {
return devicesById.values();
} finally {
devicesLock.readLock().unlock();
}
}
public Collection<Device> getDevices(long userId) throws SQLException {
Collection<Device> devices = new ArrayList<>();
devicesLock.readLock().lock();
try {
for (long id : Context.getPermissionsManager().getDevicePermissions(userId)) {
devices.add(devicesById.get(id));
}
} finally {
devicesLock.readLock().unlock();
}
return devices;
}
public void addDevice(Device device) throws SQLException {
dataManager.addDevice(device);
devicesLock.writeLock().lock();
try {
devicesById.put(device.getId(), device);
devicesByUniqueId.put(device.getUniqueId(), device);
} finally {
devicesLock.writeLock().unlock();
}
}
public void updateDevice(Device device) throws SQLException {
dataManager.updateDevice(device);
devicesLock.writeLock().lock();
try {
devicesById.put(device.getId(), device);
devicesByUniqueId.put(device.getUniqueId(), device);
} finally {
devicesLock.writeLock().unlock();
}
}
public void updateDeviceStatus(Device device) throws SQLException {
dataManager.updateDeviceStatus(device);
devicesLock.writeLock().lock();
try {
if (devicesById.containsKey(device.getId())) {
Device cachedDevice = devicesById.get(device.getId());
cachedDevice.setStatus(device.getStatus());
cachedDevice.setMotion(device.getMotion());
}
} finally {
devicesLock.writeLock().unlock();
}
}
public void removeDevice(long deviceId) throws SQLException {
dataManager.removeDevice(deviceId);
devicesLock.writeLock().lock();
try {
if (devicesById.containsKey(deviceId)) {
String deviceUniqueId = devicesById.get(deviceId).getUniqueId();
devicesById.remove(deviceId);
devicesByUniqueId.remove(deviceUniqueId);
}
} finally {
devicesLock.writeLock().unlock();
}
positions.remove(deviceId);
}
public void updateLatestPosition(Position position) throws SQLException {
Position lastPosition = getLastPosition(position.getDeviceId());
if (lastPosition == null || position.getFixTime().compareTo(lastPosition.getFixTime()) > 0) {
dataManager.updateLatestPosition(position);
devicesLock.writeLock().lock();
try {
if (devicesById.containsKey(position.getDeviceId())) {
devicesById.get(position.getDeviceId()).setPositionId(position.getId());
}
} finally {
devicesLock.writeLock().unlock();
}
positions.put(position.getDeviceId(), position);
if (Context.getConnectionManager() != null) {
Context.getConnectionManager().updatePosition(position);
}
}
}
@Override
public Position getLastPosition(long deviceId) {
return positions.get(deviceId);
}
public Collection<Position> getInitialState(long userId) {
List<Position> result = new LinkedList<>();
if (Context.getPermissionsManager() != null) {
for (long deviceId : Context.getPermissionsManager().getDevicePermissions(userId)) {
if (positions.containsKey(deviceId)) {
result.add(positions.get(deviceId));
}
}
}
return result;
}
}
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