| /* |
| * Copyright 2018 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.pump.concurrent; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| |
| import androidx.annotation.AnyThread; |
| import androidx.annotation.NonNull; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| @AnyThread |
| public final class Executors { |
| private Executors() { } |
| |
| private static final Executor DIRECT_EXECUTOR = Runnable::run; |
| private static final Executor MAIN_THREAD_EXECUTOR = new Executor() { |
| private final Handler mHandler = new Handler(Looper.getMainLooper()); |
| |
| @Override |
| public void execute(@NonNull Runnable command) { |
| if (mHandler.getLooper() != Looper.myLooper()) { |
| mHandler.post(command); |
| } else { |
| command.run(); |
| } |
| } |
| }; |
| private static final Executor UI_THREAD_EXECUTOR = MAIN_THREAD_EXECUTOR; |
| |
| public static @NonNull Executor directExecutor() { |
| return DIRECT_EXECUTOR; |
| } |
| |
| public static @NonNull Executor mainThreadExecutor() { |
| return MAIN_THREAD_EXECUTOR; |
| } |
| |
| public static @NonNull Executor uiThreadExecutor() { |
| return UI_THREAD_EXECUTOR; |
| } |
| |
| public static @NonNull ExecutorService newFixedUniqueThreadPool(int nThreads) { |
| return new UniqueExecutor(nThreads, nThreads, 0, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<>()); |
| } |
| |
| public static @NonNull ExecutorService newFixedUniqueThreadPool(int nThreads, |
| @NonNull ThreadFactory threadFactory) { |
| return new UniqueExecutor(nThreads, nThreads, 0, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<>(), threadFactory); |
| } |
| |
| public static @NonNull ExecutorService newCachedUniqueThreadPool() { |
| return new UniqueExecutor(0, Integer.MAX_VALUE, 60, TimeUnit.SECONDS, |
| new LinkedBlockingQueue<>()); |
| } |
| |
| public static @NonNull ExecutorService newCachedUniqueThreadPool( |
| @NonNull ThreadFactory threadFactory) { |
| return new UniqueExecutor(0, Integer.MAX_VALUE, 60, TimeUnit.SECONDS, |
| new LinkedBlockingQueue<>(), threadFactory); |
| } |
| } |