迁移JMS事件以侦听Spring Boot with Spring Boot的正确最终方法 [英] Proper ultimate way to migrate JMS event listening to Spring Integration with Spring Boot

问题描述

我有一个JmsConfig配置类，它通过以下方式处理主题的JMS事件:

I got a JmsConfig configuration class that handles JMS events from a topic in the following way:

• 它定义了一个@Bean ConnectionFactory，其中包含ActiveMQ实现
• 它定义了@Bean JmsListenerContainerFactory实例化DefaultJmsListenerContainerFactory并将其通过Boot的DefaultJmsListenerContainerFactoryConfigurer
• 它定义包含MappingJackson2MessageConverter的@Bean MessageConverter并设置自定义ObjectMapper
• 我在服务的方法上使用指向我的工厂的@JmsListener注释.这是我唯一可以使用的主题，仅订阅即可.

• It defines a @Bean ConnectionFactory, containing an ActiveMQ implementation
• It defines a @Bean JmsListenerContainerFactory instantiating a DefaultJmsListenerContainerFactory and passing it through Boot's DefaultJmsListenerContainerFactoryConfigurer
• It defines a @Bean MessageConverter containing a MappingJackson2MessageConverter and setting a custom ObjectMapper
• I use @JmsListener annotation pointing to myfactory on a method of my service. This is the only use I have for the topic, subscription alone.

现在，我想转到 Spring Integration .经过大量阅读后，并且假设我不需要双向使用(丢弃 Gateways )或轮询机制(丢弃 @InboundChannelAdapter )，我打算使用message-driven-channel-adapter，以传统的XML配置写成.我发现Java习惯用法应该通过新的Spring Integration DSL库来完成，因此，我在寻找适当的代码段.

Now I want to move to Spring Integration. After reading a lot, and provided I don't need a bidirectional use (discarding Gateways) neither a polling mechanism (discarding @InboundChannelAdapter), I am going for a message-driven-channel-adapter, in traditional XML configuration wording. I found that Java idiom should be accomplished by means of the new Spring Integration DSL library, and thus, I look for the proper snippet.

似乎JmsMessageDrivenChannelAdapter是适当的等效项，我找到了一种方法:

It seems JmsMessageDrivenChannelAdapter is the proper equivalent, and I found a way:

IntegrationFlows.from(Jms.messageDriverChannelAdapter(...))

但是问题在于，它仅接受ActiveMQ ConnectionFactory或AbstractMessageListenerContainer，但没有我的引导预配置的JmsListenerContainerFactory！

But the problem is that this only accepts the ActiveMQ ConnectionFactory or an AbstractMessageListenerContainer, but no my boot pre-configured JmsListenerContainerFactory !

这应该如何最终实现?

推荐答案

JmsListenerContainerFactory专用于@JmsListener，它是用于配置DefaultMessageListenerContainer的更高级别的抽象.引导程序不为原始DefaultMessageListenerContainer提供自动配置选项；您必须自己连接.但是您仍然可以使用Boot属性...

JmsListenerContainerFactory is specific for the @JmsListener, it's a higher level abstraction used to configure a DefaultMessageListenerContainer. Boot does not provide an auto configuration option for a raw DefaultMessageListenerContainer; you have to wire it up yourself. But you can still use the Boot properties...

@Bean
public IntegrationFlow flow(ConnectionFactory connectionFactory, 
                            JmsProperties properties) {
    return IntegrationFlows.from(Jms.messageDrivenChannelAdapter(container(connectionFactory, properties)))
            ...
            .get();
}

private DefaultMessageListenerContainer container(ConnectionFactory connectionFactory, 
                                                  JmsProperties properties) {
    DefaultMessageListenerContainer container = new DefaultMessageListenerContainer();
    container.setConcurrentConsumers(properties.getListener().getConcurrency());
    container.setMaxConcurrentConsumers(properties.getListener().getMaxConcurrency());
    ...
    return container;
}

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