com.keithandthegirl.services.UpdateCalendarService.java Source code

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Here is the source code for com.keithandthegirl.services.UpdateCalendarService.java

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/**
 *  This file is part of KeithAndTheGirl for Android
 * 
 *  KeithAndTheGirl for Android 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.
 *
 *  KeithAndTheGirl for Android 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 KeithAndTheGirl for Android.  If not, see <http://www.gnu.org/licenses/>.
 *   
 * This software can be found at <https://github.com/dmfrey/KeithAndTheGirl/>
 *
 */
package com.keithandthegirl.services;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.convert.AnnotationStrategy;
import org.simpleframework.xml.core.Persister;
import org.simpleframework.xml.strategy.Strategy;
import org.springframework.social.support.ClientHttpRequestFactorySelector;
import org.springframework.web.client.RestTemplate;

import android.app.Service;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;

import com.keithandthegirl.MainApplication;
import com.keithandthegirl.api.google.Feed;

/**
 * @author Daniel Frey
 *
 */
public class UpdateCalendarService extends Service {

    private static final String TAG = UpdateCalendarService.class.getSimpleName();

    public static final String BROADCAST_ACTION = "com.keithandthegirl.broadcast.streamCalendarUpdated";
    private final Handler handler = new Handler();
    private Intent broadcastIntent;

    private MainApplication applicationContext;

    /* (non-Javadoc)
     * @see android.app.Service#onCreate()
     */
    @Override
    public void onCreate() {
        super.onCreate();
        Log.d(TAG, "onCreate : enter");

        broadcastIntent = new Intent(BROADCAST_ACTION);

        Log.d(TAG, "onCreate : exit");
    }

    /* (non-Javadoc)
     * @see android.app.Service#onStart(android.content.Intent, int)
     */
    @SuppressWarnings("deprecation")
    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        Log.d(TAG, "onStart : enter");

        handler.removeCallbacks(sendUpdatesToUI);

        applicationContext = (MainApplication) getApplicationContext();

        new UpdateStreamCalendarTask().execute(MainApplication.KATG_CALENDAR_FEED);

        Log.d(TAG, "onStart : exit");
    }

    /* (non-Javadoc)
     * @see android.app.Service#onBind(android.content.Intent)
     */
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    // internal helpers

    private Runnable sendUpdatesToUI = new Runnable() {

        public void run() {
            Log.d(TAG, "Thread.sendUpdatesToUI.run : enter");

            sendBroadcast(broadcastIntent);

            Log.d(TAG, "Thread.sendUpdatesToUI.run : exit");
        }

    };

    private class UpdateStreamCalendarTask extends AsyncTask<String, Void, Feed> {

        @Override
        protected void onPreExecute() {
            Log.v(TAG, "onPreExecute : enter");

            Log.v(TAG, "onPreExecute : exit");
        }

        @Override
        protected Feed doInBackground(String... params) {
            Log.v(TAG, "doInBackground : enter");

            try {
                RestTemplate template = new RestTemplate(true,
                        ClientHttpRequestFactorySelector.getRequestFactory());
                String xml = template.getForObject(params[0], String.class);

                Strategy strategy = new AnnotationStrategy();
                Serializer serializer = new Persister(strategy);
                Feed feed = serializer.read(Feed.class, xml);
                Log.i(TAG, "feed=" + feed.toString());

                Log.v(TAG, "doInBackground : exit");
                return feed;
            } catch (Exception e) {
                Log.e(TAG, "doInBackground : error " + e.getLocalizedMessage(), e);
            }

            Log.v(TAG, "doInBackground : exit, no feed");
            return null;
        }

        @Override
        protected void onPostExecute(Feed feed) {
            Log.v(TAG, "onPostExecute : enter");

            if (null != feed) {
                setStreamCalendar(feed);
            }

            Log.v(TAG, "onPostExecute : exit");
        }

    }

    private void setStreamCalendar(Feed calendarFeed) {
        Log.d(TAG, "setStreamCalendar : enter");

        applicationContext.setCalendarFeed(calendarFeed);

        handler.postDelayed(sendUpdatesToUI, 1000); // 1 second

        Log.d(TAG, "setStreamCalendar : exit");
    }

}