Spring Integration Reactor配置

时间:2015-12-15 18:57:22

标签: spring spring-integration reactor

我正在运行一个使用spring集成处理任务的应用程序。

我想让它同时处理多个任务,但到目前为止任何尝试都失败了。

我的配置是:

ReactorConfiguration.java

@Configuration
@EnableAutoConfiguration
public class ReactorConfiguration {


    @Bean
    Environment reactorEnv() {
        return new Environment();
    }

    @Bean
    Reactor createReactor(Environment env) {
        return Reactors.reactor()
            .env(env)
            .dispatcher(Environment.THREAD_POOL)
            .get();
    }
}

TaskProcessor.java

@MessagingGateway(reactorEnvironment = "reactorEnv")
public interface TaskProcessor {
    @Gateway(requestChannel = "routeTaskByType", replyChannel = "")
    Promise<Result> processTask(Task task);
}

IntegrationConfiguration.java (简化)

@Bean
public IntegrationFlow routeFlow() {
    return IntegrationFlows.from(MessageChannels.executor("routeTaskByType", Executors.newFixedThreadPool(10)))
        .handle(Task.class, (payload, headers) -> {
            logger.info("Task submitted!" + payload);
            payload.setRunning(true);
            //Try-catch
            Thread.sleep(999999);
            return payload;
        })
        .route(/*...*/)
        .get();
}

我的测试代码可以简化为:

Task task1 = new Task();
Task task2 = new Task();

Promise<Result> resultPromise1 = taskProcessor.processTask(task1).flush();
Promise<Result> resultPromise2 = taskProcessor.processTask(task2).flush();


while( !task1.isRunning() || !task2.isRunning() ){
    logger.info("Task2: {}, Task2: {}", task1, task2);
    Thread.sleep(1000);
}

logger.info("Yes! your tasks are running in parallel!");

但不幸的是,最后的日志行将永远不会被执行!

有什么想法吗?

非常感谢

1 个答案:

答案 0 :(得分:2)

嗯,我只是用简单的Reactor测试案例来复制它:

@Test
public void testParallelPromises() throws InterruptedException {
    Environment environment = new Environment();
    final AtomicBoolean first = new AtomicBoolean(true);
    for (int i = 0; i < 10; i++) {
        final Promise<String> promise = Promises.task(environment, () -> {
                    if (!first.getAndSet(false)) {
                        try {
                            Thread.sleep(1000);
                        }
                        catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    return "foo";
                }
        );
        String result = promise.await(10, TimeUnit.SECONDS);
        System.out.println(result);
        assertNotNull(result);
    }
}

(与Reactor-2.0.6一起使用)。

问题在于:

public static <T> Promise<T> task(Environment env, Supplier<T> supplier) {
    return task(env, env.getDefaultDispatcher(), supplier);
}

其中DefaultDispatcherRingBufferDispatcher extends SingleThreadDispatcher

由于@MessagingGateway基于请求/回复方案,我们正在等待RingBufferDispatcher个帖子中的回复。由于您在那里(Thread.sleep(999999);)没有回复,我们无法接受RingBuffer内的下一个回复。

您的dispatcher(Environment.THREAD_POOL)在这里没有帮助,因为它不会影响Environment。您应该考虑使用reactor.dispatchers.default = threadPoolExecutor属性。像这个文件:https://github.com/reactor/reactor/blob/2.0.x/reactor-net/src/test/resources/META-INF/reactor/reactor-environment.properties#L46

是的:请升级到最新的Reactor。