115 lines
3.5 KiB
Java
115 lines
3.5 KiB
Java
/*
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*
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* MIT License
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*
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* Copyright (c) 2020 TerraForged
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.terraforged.core.util.concurrent;
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import com.terraforged.core.util.concurrent.batcher.AsyncBatcher;
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import com.terraforged.core.util.concurrent.batcher.Batcher;
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import com.terraforged.core.util.concurrent.batcher.SyncBatcher;
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import java.util.concurrent.Callable;
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import java.util.concurrent.Executor;
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import java.util.concurrent.ForkJoinPool;
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import java.util.concurrent.ForkJoinTask;
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public class ThreadPool implements Executor {
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private static final ThreadPool instance = create("TF", defaultPoolSize());
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private final ForkJoinPool service;
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private ThreadPool(ForkJoinPool service) {
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this.service = service;
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}
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@Override
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public void execute(Runnable command) {
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service.submit(command);
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}
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public ForkJoinTask<?> submit(Runnable runnable) {
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return service.submit(runnable);
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}
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public <T> ForkJoinTask<T> submit(Callable<T> callable) {
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return service.submit(callable);
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}
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public Batcher batcher(int size) {
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return new AsyncBatcher(service, size);
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}
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public static ThreadPool getPool() {
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return instance;
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}
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public static ThreadPool create(String name, int size) {
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if (size < 2) {
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return new SingleThreadExecutor();
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}
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return new ThreadPool(createPool(name, size));
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}
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public static ForkJoinPool createPool(String name, int size) {
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return new ForkJoinPool(size, new WorkerFactory.ForkJoin(name), null, true);
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}
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private static int defaultPoolSize() {
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int threads = Runtime.getRuntime().availableProcessors();
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return Math.max(1, (int) ((threads / 3F) * 2F));
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}
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private static class SingleThreadExecutor extends ThreadPool {
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private SingleThreadExecutor() {
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super(null);
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}
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@Override
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public void execute(Runnable command) {
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command.run();
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}
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@Override
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public ForkJoinTask<?> submit(Runnable runnable) {
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ForkJoinTask<?> task = ForkJoinTask.adapt(runnable);
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task.invoke();
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return task;
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}
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@Override
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public <T> ForkJoinTask<T> submit(Callable<T> callable) {
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ForkJoinTask<T> task = ForkJoinTask.adapt(callable);
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task.invoke();
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return task;
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}
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@Override
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public Batcher batcher(int size) {
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return new SyncBatcher();
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}
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}
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}
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