Question

我的项目中有2平方听众。我希望其中之一具有相同的设置，而其中之一具有不同的设置。我要更改的唯一值是maxNumberOfMessages。

最实用的方法是什么？ ı希望为侦听器之一设置不同的maxNumberOfMessages值。

这是我的配置；

@Bean
public AWSCredentialsProvider awsCredentialsProvider(@Value("${cloud.aws.profile}") String profile,
                                                     @Value("${cloud.aws.region.static}") String region,
                                                     @Value("${cloud.aws.roleArn}") String role,
                                                     @Value("${cloud.aws.user}") String user) {
    ...

    return new AWSStaticCredentialsProvider(sessionCredentials);
}

@Bean
@Primary
@Qualifier("amazonSQSAsync")
public AmazonSQSAsync amazonSQSAsync(@Value("${cloud.aws.region.static}") String region, AWSCredentialsProvider awsCredentialsProvider) {
    return AmazonSQSAsyncClientBuilder.standard()
            .withCredentials(awsCredentialsProvider)
            .withRegion(region)
            .build();
}

@Bean
@Primary
public SimpleMessageListenerContainerFactory simpleMessageListenerContainerFactory(AmazonSQSAsync amazonSqs) {
    SimpleMessageListenerContainerFactory factory = new SimpleMessageListenerContainerFactory();
    factory.setAmazonSqs(amazonSqs);
    factory.setMaxNumberOfMessages(1);
    factory.setWaitTimeOut(10);
    factory.setQueueMessageHandler(new SqsQueueMessageHandler());
    return factory;
}

这是听众；

@SqsListener(value = "${messaging.queue.blabla.source}", deletionPolicy = SqsMessageDeletionPolicy.NEVER)
public void listen(Message message, Acknowledgment acknowledgment, @Header("MessageId") String messageId) {
    log.info("Message Received");

    try {
        ....
        acknowledgment.acknowledge().get();
    } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {
        e.printStackTrace();
    } catch (Exception ex) {
        throw new RuntimeException(ex.getMessage());
    }
}

Answer 1

以下黑客为我工作（如果每个侦听器侦听不同的队列）

@Bean
public SimpleMessageListenerContainerFactory simpleMessageListenerContainerFactory(AmazonSQSAsync amazonSqs) {

    return new SimpleMessageListenerContainerFactory() {
        @Override
        public SimpleMessageListenerContainer createSimpleMessageListenerContainer() {
            SimpleMessageListenerContainer simpleMessageListenerContainer = new SimpleMessageListenerContainer() {
                @Override
                protected void startQueue(String queueName, QueueAttributes queueAttributes) {
                    
                    // A place to configure queue based maxNumberOfMessages
                    
                    try {
                        if (queueName.endsWith(".fifo")) {
                            FieldUtils.writeField(queueAttributes, "maxNumberOfMessages", 1, true);
                        }
                    } catch (IllegalAccessException e) {
                        throw new RuntimeException(e);
                    }
                    super.startQueue(queueName, queueAttributes);
                }
            };
            simpleMessageListenerContainer.setAmazonSqs(amazonSqs);
            return simpleMessageListenerContainer;
        }
    };
}

Answer 2

ı找到了解决方案并在github上的示例存储库上共享。 github link

如果我在侦听器类上添加@EnableAsync注释，并将@Async注释添加到处理程序方法中，我的问题就解决了：）

Answer 3

不幸的是，Sushant 的解决方案没有在 Kotlin 中为我编译（因为 QueueAttributes 是静态保护类），但我用它写了以下内容：

    @Bean
fun simpleMessageListenerContainerFactory(sqs: AmazonSQSAsync): SimpleMessageListenerContainerFactory =
    object : SimpleMessageListenerContainerFactory() {
        override fun createSimpleMessageListenerContainer(): SimpleMessageListenerContainer {
            val container = object : SimpleMessageListenerContainer() {
                override fun afterPropertiesSet() {
                    super.afterPropertiesSet()
                    registeredQueues.forEach { (queue, attributes) ->
                        if (queue.contains(QUEUE_NAME)) {
                            FieldUtils.writeField(
                                attributes,
                                "maxNumberOfMessages",
                                NEW_MAX_NUMBER_OF_MESSAGES,
                                true
                            )
                        }
                    }
                }
            }

            container.setWaitTimeOut(waitTimeOut)
            container.setMaxNumberOfMessages(maxNumberOfMessages)
            container.setAmazonSqs(sqs)
            return container
        }
    }

春云aws多方sqs监听器

3 个答案: