GCMReceiver.java

/*
 * Copyright (c) 2013 Google Inc.
 *
 * 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 com.google.cloud.backend.android;

import java.io.IOException;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import com.google.android.gms.gcm.GoogleCloudMessaging;

/**
 * This class manages Google Cloud Messaging push notifications and CloudQuery
 * subscriptions.
 * 
 */
public class GCMReceiver extends BroadcastReceiver {

    private final static String GCM_KEY_SUBID = "subId";
    private final static String GCM_TYPEID_QUERY = "query";

    /**
     * Returns registration id associated with the specified {@link Context}.
     * 
     * @param context
     *            {@link Context}
     * @return registration id
     */
    public static String getRegistrationId(Context context) {
        GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context);

        String registrationId = null;
        try {
            registrationId = gcm.register(Consts.PROJECT_NUMBER);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return registrationId;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // decode subId in the message
        String subId = intent.getStringExtra(GCM_KEY_SUBID);
        Log.i(Consts.TAG, "onMessage: subId: " + subId);
        String[] tokens = subId.split(":");
        String typeId = tokens[1];

        // dispatch message
        if (GCM_TYPEID_QUERY.equals(typeId)) {
            CloudBackendAsync.handleQueryMessage(tokens[2]);
        }
    }
}