| /* |
| * 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.example.android.autofill.service.util; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.support.annotation.NonNull; |
| import android.support.annotation.VisibleForTesting; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Executors; |
| |
| /** |
| * Global executor pools for the whole application. |
| * <p> |
| * Grouping tasks like this avoids the effects of task starvation (e.g. disk reads don't wait behind |
| * webservice requests). |
| */ |
| public class AppExecutors { |
| |
| private static final int THREAD_COUNT = 3; |
| |
| private final Executor diskIO; |
| |
| private final Executor networkIO; |
| |
| private final Executor mainThread; |
| |
| @VisibleForTesting |
| AppExecutors(Executor diskIO, Executor networkIO, Executor mainThread) { |
| this.diskIO = diskIO; |
| this.networkIO = networkIO; |
| this.mainThread = mainThread; |
| } |
| |
| public AppExecutors() { |
| this(new DiskIOThreadExecutor(), Executors.newFixedThreadPool(THREAD_COUNT), |
| new MainThreadExecutor()); |
| } |
| |
| public Executor diskIO() { |
| return diskIO; |
| } |
| |
| public Executor networkIO() { |
| return networkIO; |
| } |
| |
| public Executor mainThread() { |
| return mainThread; |
| } |
| |
| private static class MainThreadExecutor implements Executor { |
| private Handler mainThreadHandler = new Handler(Looper.getMainLooper()); |
| |
| @Override |
| public void execute(@NonNull Runnable command) { |
| mainThreadHandler.post(command); |
| } |
| } |
| |
| /** |
| * Executor that runs a task on a new background thread. |
| */ |
| private static class DiskIOThreadExecutor implements Executor { |
| |
| private final Executor mDiskIO; |
| |
| public DiskIOThreadExecutor() { |
| mDiskIO = Executors.newSingleThreadExecutor(); |
| } |
| |
| @Override |
| public void execute(@NonNull Runnable command) { |
| mDiskIO.execute(command); |
| } |
| } |
| } |