| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 android.app.usage; |
| |
| import android.annotation.SystemApi; |
| import android.app.Service; |
| import android.app.usage.ICacheQuotaService; |
| import android.content.Intent; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteCallback; |
| import android.util.Log; |
| import android.util.Pair; |
| |
| import java.util.List; |
| |
| /** |
| * CacheQuoteService defines a service which accepts cache quota requests and processes them, |
| * thereby filling out how much quota each request deserves. |
| * {@hide} |
| */ |
| @SystemApi |
| public abstract class CacheQuotaService extends Service { |
| private static final String TAG = "CacheQuotaService"; |
| |
| /** |
| * The {@link Intent} action that must be declared as handled by a service |
| * in its manifest for the system to recognize it as a quota providing service. |
| */ |
| public static final String SERVICE_INTERFACE = "android.app.usage.CacheQuotaService"; |
| |
| /** {@hide} **/ |
| public static final String REQUEST_LIST_KEY = "requests"; |
| |
| private CacheQuotaServiceWrapper mWrapper; |
| private Handler mHandler; |
| |
| @Override |
| public void onCreate() { |
| super.onCreate(); |
| mWrapper = new CacheQuotaServiceWrapper(); |
| mHandler = new ServiceHandler(getMainLooper()); |
| } |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| return mWrapper; |
| } |
| |
| /** |
| * Processes the cache quota list upon receiving a list of requests. |
| * @param requests A list of cache quotas to fulfill. |
| * @return A completed list of cache quota requests. |
| */ |
| public abstract List<CacheQuotaHint> onComputeCacheQuotaHints( |
| List<CacheQuotaHint> requests); |
| |
| private final class CacheQuotaServiceWrapper extends ICacheQuotaService.Stub { |
| @Override |
| public void computeCacheQuotaHints( |
| RemoteCallback callback, List<CacheQuotaHint> requests) { |
| final Pair<RemoteCallback, List<CacheQuotaHint>> pair = |
| Pair.create(callback, requests); |
| Message msg = mHandler.obtainMessage(ServiceHandler.MSG_SEND_LIST, pair); |
| mHandler.sendMessage(msg); |
| } |
| } |
| |
| private final class ServiceHandler extends Handler { |
| public static final int MSG_SEND_LIST = 1; |
| |
| public ServiceHandler(Looper looper) { |
| super(looper, null, true); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| final int action = msg.what; |
| switch (action) { |
| case MSG_SEND_LIST: |
| final Pair<RemoteCallback, List<CacheQuotaHint>> pair = |
| (Pair<RemoteCallback, List<CacheQuotaHint>>) msg.obj; |
| List<CacheQuotaHint> processed = onComputeCacheQuotaHints(pair.second); |
| final Bundle data = new Bundle(); |
| data.putParcelableList(REQUEST_LIST_KEY, processed); |
| |
| final RemoteCallback callback = pair.first; |
| callback.sendResult(data); |
| break; |
| default: |
| Log.w(TAG, "Handling unknown message: " + action); |
| } |
| } |
| } |
| } |