1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.pump.concurrent; 18 19 import androidx.annotation.AnyThread; 20 import androidx.annotation.NonNull; 21 import androidx.annotation.Nullable; 22 23 import java.util.Collection; 24 import java.util.Collections; 25 import java.util.HashSet; 26 import java.util.concurrent.BlockingQueue; 27 import java.util.concurrent.RejectedExecutionHandler; 28 import java.util.concurrent.ThreadFactory; 29 import java.util.concurrent.ThreadPoolExecutor; 30 import java.util.concurrent.TimeUnit; 31 32 @AnyThread 33 public class UniqueExecutor extends ThreadPoolExecutor { 34 private final Collection<Runnable> mRunning = Collections.synchronizedSet(new HashSet<>()); 35 UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue)36 public UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, 37 @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue) { 38 super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue); 39 } 40 UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, @NonNull ThreadFactory threadFactory)41 public UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, 42 @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, 43 @NonNull ThreadFactory threadFactory) { 44 super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory); 45 } 46 UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, @NonNull RejectedExecutionHandler handler)47 public UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, 48 @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, 49 @NonNull RejectedExecutionHandler handler) { 50 super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler); 51 } 52 UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, @NonNull ThreadFactory threadFactory, @NonNull RejectedExecutionHandler handler)53 public UniqueExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, 54 @NonNull TimeUnit unit, @NonNull BlockingQueue<Runnable> workQueue, 55 @NonNull ThreadFactory threadFactory, @NonNull RejectedExecutionHandler handler) { 56 super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory, 57 handler); 58 } 59 60 @Override execute(@onNull Runnable command)61 public void execute(@NonNull Runnable command) { 62 if (!mRunning.add(command)) { 63 return; 64 } 65 super.execute(command); 66 } 67 68 @Override afterExecute(@onNull Runnable r, @Nullable Throwable t)69 protected void afterExecute(@NonNull Runnable r, @Nullable Throwable t) { 70 super.afterExecute(r, t); 71 mRunning.remove(r); 72 } 73 } 74