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/*
* Copyright 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.example.android.basicsyncadapter;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
/** Service to handle sync requests.
*
* <p>This service is invoked in response to Intents with action android.content.SyncAdapter, and
* returns a Binder connection to SyncAdapter.
*
* <p>For performance, only one sync adapter will be initialized within this application's context.
*
* <p>Note: The SyncService itself is not notified when a new sync occurs. It's role is to
* manage the lifecycle of our {@link SyncAdapter} and provide a handle to said SyncAdapter to the
* OS on request.
*/
public class SyncService extends Service {
private static final String TAG = "SyncService";
private static final Object sSyncAdapterLock = new Object();
private static SyncAdapter sSyncAdapter = null;
/**
* Thread-safe constructor, creates static {@link SyncAdapter} instance.
*/
@Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "Service created");
synchronized (sSyncAdapterLock) {
if (sSyncAdapter == null) {
sSyncAdapter = new SyncAdapter(getApplicationContext(), true);
}
}
}
@Override
/**
* Logging-only destructor.
*/
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "Service destroyed");
}
/**
* Return Binder handle for IPC communication with {@link SyncAdapter}.
*
* <p>New sync requests will be sent directly to the SyncAdapter using this channel.
*
* @param intent Calling intent
* @return Binder handle for {@link SyncAdapter}
*/
@Override
public IBinder onBind(Intent intent) {
return sSyncAdapter.getSyncAdapterBinder();
}
}
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