java ThreadPoolExecutor 并发调用实例详解
概述
通常为了提供任务的处理速度,会使用一些并发模型，ThreadPoolExecutor中的invokeAll便是一种。
代码
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
package test.current;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.Future;public class TestCallable { public static void main(String[] args) throws InterruptedException, ExecutionException { List<Callable<List<Long>>> tasks = new ArrayList<>(); for (int i = 0; i < 10; i++) { Callable<List<Long>> task = new Callable<List<Long>>() { @Override public List<Long> call() throws Exception { return Arrays.asList(1L,2L); } }; tasks.add(task); } List<Long> finalResults = new ArrayList<>(10); List<Future<List<Long>>> results = ThreadPool.getThreadPool().invokeAll(tasks); for(Future<List<Long>> ele : results) { List<Long> list = ele.get(); finalResults.addAll(list); } System.out.println(finalResults); }} |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
package test.current;import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;public class ThreadPool { private static final int CORE_SIZE = 8; private static final int MAX_SIZE = 12; private static final long KEEP_ALIVE_TIME = 30; private static final int QUEUE_SIZE = 50000; private static ThreadPoolExecutor threadPool = new ThreadPoolExecutor(CORE_SIZE, MAX_SIZE, KEEP_ALIVE_TIME, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(QUEUE_SIZE), new ThreadPoolExecutor.AbortPolicy()); public static ThreadPoolExecutor getThreadPool() { return threadPool; }} |
可以把需要执行的任务创建一个Callable task,利用线程池中的线程并发的执行这些task,从而提高任务的执行效率。
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
原文链接：http://blog.csdn.net/linsongbin1/article/details/71244376
