java - 从作业中调用 Controller 操作方法

Question

我试图从 Job 子类调用由 String 指定的任意 Controller 操作。

我已尝试接受的答案 this question ，但发现它对我不起作用... WS.url("http://www.yahoo.com/").get(); 有效，但是 WS .url("http://localhost/foo/bar").get() 阻塞并最终在 60 秒后超时。

我还尝试按照this answer中的建议增加application.conf中的play.pool值，但这没有什么区别。

这是我的代码:

application.conf:

# Execution pool
# ~~~~~
# Default to 1 thread in DEV mode or (nb processors + 1) threads in PROD mode.
# Try to keep a low as possible. 1 thread will serialize all requests (very useful for debugging purpose)
play.pool=3

路线:

PUT     /jobs/invokejob                         Jobs.invokeTestJob
GET     /jobs/sampleAction                      Jobs.sampleControllerAction

Jobs.java:

public static void invokeTestJob()
{
    Logger.warn("Jobs.invokeTestJob() called");
    new SampleJob("Jobs.sampleControllerAction").in(1);
    Logger.warn("Finished scheduling SampleJob");

    listJobs();
}

public static void sampleControllerAction()
{
    Logger.warn("Jobs.sampleControllerAction() called");
    renderText("OK");
}

SampleJob.java:

public class SampleJob extends QJob
{
    public final String action;

    public SampleJob(String actionSpec)
    {
        this.action = actionSpec;
    }

    @Override
    public void doJob()
    {
        Logger.warn("SampleJob.doJob() called");

        final ActionDefinition actionDefinition = Router.reverse(action);
        actionDefinition.absolute();
        final WSRequest URL = WS.url(actionDefinition.url);
        HttpResponse response = null;
        switch(actionDefinition.method)
        {
            case "GET":
            {
                Logger.warn("GETting %s", URL.url);
                response = URL.get();
                break;
            }
            case "POST":
            {
                Logger.warn("POSTting %s", URL.url);
                response = URL.post();
                break;
            }
            case "PUT":
            {
                Logger.warn("PUTting %s", URL.url);
                response = URL.put();
                break;
            }
            case "DELETE":
            {
                Logger.warn("DELETEing %s", URL.url);
                response = URL.delete();
                break;
            }
        }
        Logger.warn("response=%s", response.getString());
    }
}

日志输出:

13:22:50,783 WARN  [play-thread-1] ~ Jobs.invokeTestJob() called
13:22:50,786 WARN  [play-thread-1] ~ Finished scheduling SampleJob
13:22:51,804 WARN  [jobs-thread-1] ~ SampleJob.doJob() called
13:22:51,857 WARN  [jobs-thread-1] ~ GETting http://localhost/quattro/jobs/sampleAction
13:23:51,886 ERROR [jobs-thread-1] ~ 

@6fe61pf2p
Error during job execution (jobs.SampleJob)

Execution exception (In {module:quattro}/app/jobs/SampleJob.java around line 36)
RuntimeException occured : java.util.concurrent.ExecutionException: java.util.concurrent.TimeoutException: No response received after 60000

play.exceptions.JavaExecutionException: java.util.concurrent.ExecutionException: java.util.concurrent.TimeoutException: No response received after 60000
    at play.jobs.Job.call(Job.java:155)
    at play.jobs.Job$2.call(Job.java:94)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.util.concurrent.TimeoutException: No response received after 60000
    at play.libs.ws.WSAsync$WSAsyncRequest.get(WSAsync.java:223)
    at jobs.SampleJob.doJob(SampleJob.java:36)
    at play.jobs.Job.doJobWithResult(Job.java:50)
    at play.jobs.Job.call(Job.java:146)
    ... 8 more
Caused by: java.util.concurrent.ExecutionException: java.util.concurrent.TimeoutException: No response received after 60000
    at com.ning.http.client.providers.netty.NettyResponseFuture.get(NettyResponseFuture.java:223)
    at com.ning.http.client.providers.netty.NettyResponseFuture.get(NettyResponseFuture.java:187)
    at play.libs.ws.WSAsync$WSAsyncRequest.get(WSAsync.java:221)
    ... 11 more
Caused by: java.util.concurrent.TimeoutException: No response received after 60000
    at com.ning.http.client.providers.netty.NettyResponseFuture.get(NettyResponseFuture.java:215)
    ... 13 more

请注意 13:22:51,857 和 13:23:51,886 之间的时间间隔 - 即 60 秒超时。

知道出了什么问题吗？

现在，我只是想让这个简单的案例发挥作用。稍后，我需要在请求中提供 cookie 等。

此外，我对使用 WS 来实现此目的不太满意，因为我并没有真正尝试访问另一台主机上的 Web 服务；我正在尝试调用我自己的应用程序中的一些代码，因此必须生成返回给我自己的实际 HTTP 请求似乎有点愚蠢。有没有办法在内部构造请求的内容并直接调用操作方法？

如上所述，这样做的目的是允许将任意 Controller 操作安排为我的系统中的作业。我希望避免每次需要安排作业来执行某些 Controller 代码已经执行的操作时都必须编写代码。

Answer 1

我发现了问题。我的请求被重定向。实际上，它被重定向了两次:一次是因为我正在使用安全模块，该模块会重定向到登录页面，甚至在此之前，我的公司似乎安装了 localhost 请求的一些网络安全设备本地网络 IP 地址。

我确实将我的 WSRequest 对象的 followRedirects 属性设置为 true，但似乎不起作用，并导致它挂起。一旦我关闭它，我就看到了重定向的发生，然后我做了一些解决方法来避免重定向，所以现在它可以工作了。