| /* |
| * 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 com.android.systemui.shared.system; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| |
| /** |
| * Offloads work from other threads by running it in a background thread. |
| */ |
| public class BackgroundExecutor { |
| |
| private static final BackgroundExecutor sInstance = new BackgroundExecutor(); |
| |
| private final ExecutorService mExecutorService = Executors.newFixedThreadPool(2); |
| |
| /** |
| * @return the static instance of the background executor. |
| */ |
| public static BackgroundExecutor get() { |
| return sInstance; |
| } |
| |
| /** |
| * Runs the given {@param callable} on one of the background executor threads. |
| */ |
| public <T> Future<T> submit(Callable<T> callable) { |
| return mExecutorService.submit(callable); |
| } |
| |
| /** |
| * Runs the given {@param runnable} on one of the background executor threads. |
| */ |
| public Future<?> submit(Runnable runnable) { |
| return mExecutorService.submit(runnable); |
| } |
| |
| /** |
| * Runs the given {@param runnable} on one of the background executor threads. Return |
| * {@param result} when the future is resolved. |
| */ |
| public <T> Future<T> submit(Runnable runnable, T result) { |
| return mExecutorService.submit(runnable, result); |
| } |
| } |