Question

我有一个请求处理程序，它在内部进行一些繁重的操作并且需要大约5秒才能返回。该请求返回一个包含3个集合的Model。最重的集合需要大约2秒来处理，它们都是独立的。我想尝试在请求中并行运行它们，但我尝试过的任何东西似乎都没有用。我所看到的是tomcat处理前几个请求，但很快它就会窒息而停止。

这是Iv尝试过的：

我有一个实用程序，它使用Callable，在一个非常大的Executor上运行它们，然后返回FutureTasks。

public class Async {

    public static boolean active = true;
    private static ExecutorService exe = active ? Executors.newFixedThreadPool(50) : null;

    public static FutureTask run(Callable callable) throws Exception {
        FutureTask f = new FutureTask(callable);
        if (active) {
            exe.execute(f);
        } else {
            f.run();
        }
        return f;
    }
}

我这样使用它：

@RequestMapping("/test")
public
@ResponseBody
MessageDto authenticate(HttpServletRequest request, HttpServletResponse response) throws Exception {

final Map<String, Object> responseMap = new HashMap<String, Object>();

FutureTask future1 = Async.run(new Callable() {
    @Override
    public Object call() throws Exception {
        try {
            [SOME PROCESS THAT TAKES ABOUT 2 SECS]
        } catch (Exception ex) {
            LOG.error(ex);
        }
        return null;  //To change body of implemented methods use File | Settings | File Templates.
    }
});

FutureTask future2 = Async.run(new Callable() {
    @Override
    public Object call() throws Exception {
        try {
            [SOME PROCESS THAT TAKES ABOUT 2 SECS]
        } catch (Exception ex) {
            LOG.error(ex);
        }
        return null;  //To change body of implemented methods use File | Settings | File Templates.
    }
});

FutureTask future3 = Async.run(new Callable() {
    @Override
    public Object call() throws Exception {
        try {
            [SOME PROCESS THAT TAKES ABOUT 1 SEC]
        } catch (Exception ex) {
            LOG.error(ex);
        }
        return null;  //To change body of implemented methods use File | Settings | File Templates.
    }
});

future1.get();
future2.get();
future3.get();

return new MessageDto(responseMap);
}

我也试过使用Spring的@Async，但结果相同，服务器卡住了。请帮忙感谢

Spring控制器内部的异步处理

0 个答案: