/**
* Copyright (C) 2013 Romain Guefveneu.
*
* This file is part of naonedbus.
*
* Naonedbus is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Naonedbus is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.naonedbus.manager.impl;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;
import net.naonedbus.bean.Equipement;
import net.naonedbus.bean.async.ParkingPublicTaskInfo;
import net.naonedbus.bean.parking.pub.ParkingPublic;
import net.naonedbus.manager.Unschedulable;
import net.naonedbus.rest.controller.impl.ParkingPublicsController;
import org.joda.time.DateTime;
import org.json.JSONException;
import android.content.ContentResolver;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
public class ParkingPublicManager implements Unschedulable<ParkingPublicTaskInfo> {
private static final String LOG_TAG = ParkingPublicManager.class.getSimpleName();
private static final int CACHE_LIMITE_MINUTES = 15;
private static ParkingPublicManager sInstance;
private List<ParkingPublic> mCache;
private DateTime mDateLimit;
private Thread mParkingsThread;
private final Stack<ParkingPublicTaskInfo> mParkingsTasks;
private final Object mLock = new Object();
public static synchronized ParkingPublicManager getInstance() {
if (sInstance == null) {
sInstance = new ParkingPublicManager();
}
return sInstance;
}
private ParkingPublicManager() {
this.mCache = new ArrayList<ParkingPublic>();
this.mParkingsTasks = new Stack<ParkingPublicTaskInfo>();
}
/**
* Charger les données et gérer le cache.
*
* @throws IOException
* @throws JSONException
*/
private void init(final Context context) throws IOException, JSONException {
final DateTime now = new DateTime();
if (this.mCache.isEmpty() || now.isAfter(this.mDateLimit)) {
final ParkingPublicsController controller = new ParkingPublicsController();
this.mCache.clear();
this.mCache = controller.getAll(context.getResources());
this.mDateLimit = now.plusMinutes(CACHE_LIMITE_MINUTES);
fillParkings(context.getContentResolver(), this.mCache);
}
}
/**
* Récupérer les parkings publics.
*
* @return La liste des parkings publics
* @throws IOException
* @throws JSONException
*/
public List<ParkingPublic> getAll(final Context context) throws IOException, JSONException {
init(context);
return mCache;
}
/**
* Récupérer un parking public selon son id, si disponible en cache.
*
* @param id
* L'id du parking.
* @return Le parking s'il est disponible, {@code null} sinon.
*/
public ParkingPublic getFromCache(final int id) {
for (final ParkingPublic parkingPublic : mCache) {
if (parkingPublic.getId().equals(id)) {
return parkingPublic;
}
}
return null;
}
/**
* Ajouter les informations complémentaires des parkings publics contenues
* dans l'équipement en base correspondant.
*
* @param contentResolver
* @param parkingsPublics
*/
private void fillParkings(final ContentResolver contentResolver, final List<ParkingPublic> parkingsPublics) {
final EquipementManager equipementManager = EquipementManager.getInstance();
final List<Equipement> equipementsParkings = equipementManager.getParkings(contentResolver,
EquipementManager.SousType.PARKING_PUBLIC);
for (final ParkingPublic parkingPublic : parkingsPublics) {
Equipement foundEquipement = null;
for (final Equipement equipement : equipementsParkings) {
if (parkingPublic.getId().equals(equipement.getId())) {
foundEquipement = equipement;
fillParking(parkingPublic, equipement);
}
}
// Optimisation
if (foundEquipement != null) {
equipementsParkings.remove(foundEquipement);
}
}
}
/**
* Compléter les données d'un parking public par celles de l'équipement
* correspondant.
*
* @param parkingPublic
* @param equipement
*/
private void fillParking(final ParkingPublic parkingPublic, final Equipement equipement) {
parkingPublic.setNom(equipement.getNom());
parkingPublic.setLatitude(equipement.getLatitude());
parkingPublic.setLongitude(equipement.getLongitude());
parkingPublic.setAdresse(equipement.getAdresse());
parkingPublic.setTelephone(equipement.getTelephone());
parkingPublic.setUrl(equipement.getTelephone());
}
/**
* Programmer la récupération d'un parking de manière asynchrone.
*
* @param contentResolver
* @param idParking
* L'id du parking à récupérer.
* @param callback
* Un {@code Handler} receptionnant le resultat dans {@code obj}
* sous forme de {@code ParkingPublic} .
* @return
*/
public ParkingPublicTaskInfo scheduleGetParkingPublic(final Context context, final int idParking,
final Handler callback) {
final ParkingPublicTaskInfo task = new ParkingPublicTaskInfo(context, idParking, callback);
mParkingsTasks.push(task);
if (mParkingsThread == null || !mParkingsThread.isAlive()) {
mParkingsThread = new Thread(parkingsLoader);
mParkingsThread.start();
} else if (mParkingsThread.getState().equals(Thread.State.TIMED_WAITING)) {
synchronized (mLock) {
mLock.notify();
}
}
return task;
}
@Override
public void unschedule(final ParkingPublicTaskInfo task) {
mParkingsTasks.remove(task);
}
/**
* Tâche de chargement d'un parking de manière asynchrone.
*/
private final Runnable parkingsLoader = new Runnable() {
@Override
public void run() {
final Iterator<ParkingPublicTaskInfo> iterator = mParkingsTasks.iterator();
ParkingPublic parking;
ParkingPublicTaskInfo task;
Handler handler;
Message message;
while (iterator.hasNext()) {
task = mParkingsTasks.pop();
try {
init(task.getContext());
parking = getFromCache(task.getTag());
} catch (final IOException e) {
parking = null;
} catch (final JSONException e) {
parking = null;
}
handler = task.getHandler();
message = handler.obtainMessage();
message.obj = parking;
message.sendToTarget();
if (mParkingsTasks.isEmpty()) {
synchronized (mLock) {
try {
mLock.wait(2000);
} catch (final InterruptedException e) {
}
}
}
}
}
};
}