如何限制在Executor中执行的线程数?例如,在下面代码中:
executor = Executors.newFixedThreadPool(this.noOfThreads);
for (int i = 0; i < sections.size(); i++) {
DomNode section = sections.get(i);
// Retrieve the url of the subsection
String subsection
主要进程:
int cpus = Runtime.getRuntime().availableProcessors();
ExecutorService executor = Executors.newFixedThreadPool(cpus);
List<Callable<Object>> todo = new ArrayList<Callable<Object>>(lines.size());
for (int r = 0; r < line
我正在使用Java的并发性库ExecutorService来运行我的任务。写入数据库的阈值是200QPS,然而,这个程序只能在15个线程的情况下达到20QPS。我尝试了5,10,20,30个线程,它们甚至比15个线程还要慢。代码如下:
ExecutorService executor = Executors.newFixedThreadPool(15);
List<Callable<Object>> todos = new ArrayList<>();
for (final int id : ids) {
todos.add(Executors.c
所以,我有一个这样的服务器:
public class Server {
private ExecutorService executor = null;
private class WorkerThread implements Runnable{
public void run() {
try{
do{
synchronized(executor){
executor.wait();
我在Solaris 10上运行Java1.5,我的程序是一个独立的Java程序,使用java并发包和log4j-1.2.12.jar记录某些信息。主逻辑如下所示
ExecutorService executor = new AppThreadPoolExecutor(10, 10, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(Integer.MAX_VALUE), new AppThreadFactory("BSRT", true), new ThreadPoolExecutor.Call
我在winterbe.com上看到了下面的示例,它演示了原子变量的使用。
// From http://winterbe.com/posts/2015/05/22/java8-concurrency-tutorial-atomic-concurrent-map-examples/
public class Test_AtomicInteger {
public static void main(String[] args) {
AtomicInteger atomicInt = new AtomicInteger(0);
ExecutorService execu
可能的重复:
是否有一种方法可以阻止当前线程直到ExecutorService完成其所有任务?
executor.execute(task1);
executor.execute(task2);
executor.execute(task3);
executor.execute(task4);
executor.execute(task5);
// ...now I want to block until all tasks have finished executing...
System.out.println("done!")
假设我有这样的密码:
class Foo {
private final ExecutorService executor;
public Foo(ExecutorService executor) {
this.executor = executor;
}
public void doSomething() {
executor.execute(() -> {/* Do important task */});
}
}
如果不是在构造函数中传递ThreadPoolExecutor,而是使用ForkJoinPoo