113 lines
3.8 KiB
Java
113 lines
3.8 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app.usage;
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import android.annotation.SystemApi;
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import android.app.Service;
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import android.app.usage.ICacheQuotaService;
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import android.content.Intent;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.Looper;
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import android.os.Message;
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import android.os.RemoteCallback;
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import android.util.Log;
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import android.util.Pair;
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import java.util.List;
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/**
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* CacheQuoteService defines a service which accepts cache quota requests and processes them,
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* thereby filling out how much quota each request deserves.
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* {@hide}
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*/
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@SystemApi
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public abstract class CacheQuotaService extends Service {
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private static final String TAG = "CacheQuotaService";
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/**
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* The {@link Intent} action that must be declared as handled by a service
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* in its manifest for the system to recognize it as a quota providing service.
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*/
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public static final String SERVICE_INTERFACE = "android.app.usage.CacheQuotaService";
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/** {@hide} **/
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public static final String REQUEST_LIST_KEY = "requests";
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private CacheQuotaServiceWrapper mWrapper;
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private Handler mHandler;
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@Override
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public void onCreate() {
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super.onCreate();
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mWrapper = new CacheQuotaServiceWrapper();
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mHandler = new ServiceHandler(getMainLooper());
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}
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@Override
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public IBinder onBind(Intent intent) {
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return mWrapper;
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}
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/**
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* Processes the cache quota list upon receiving a list of requests.
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* @param requests A list of cache quotas to fulfill.
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* @return A completed list of cache quota requests.
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*/
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public abstract List<CacheQuotaHint> onComputeCacheQuotaHints(
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List<CacheQuotaHint> requests);
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private final class CacheQuotaServiceWrapper extends ICacheQuotaService.Stub {
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@Override
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public void computeCacheQuotaHints(
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RemoteCallback callback, List<CacheQuotaHint> requests) {
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final Pair<RemoteCallback, List<CacheQuotaHint>> pair =
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Pair.create(callback, requests);
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Message msg = mHandler.obtainMessage(ServiceHandler.MSG_SEND_LIST, pair);
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mHandler.sendMessage(msg);
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}
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}
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private final class ServiceHandler extends Handler {
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public static final int MSG_SEND_LIST = 1;
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public ServiceHandler(Looper looper) {
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super(looper, null, true);
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}
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@Override
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public void handleMessage(Message msg) {
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final int action = msg.what;
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switch (action) {
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case MSG_SEND_LIST:
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final Pair<RemoteCallback, List<CacheQuotaHint>> pair =
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(Pair<RemoteCallback, List<CacheQuotaHint>>) msg.obj;
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List<CacheQuotaHint> processed = onComputeCacheQuotaHints(pair.second);
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final Bundle data = new Bundle();
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data.putParcelableList(REQUEST_LIST_KEY, processed);
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final RemoteCallback callback = pair.first;
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callback.sendResult(data);
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break;
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default:
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Log.w(TAG, "Handling unknown message: " + action);
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}
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}
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}
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}
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