Spring 集成：以列表形式获取频道中的消息

Question

I want to subscribe to a PubSub channel, to get all messages payload and processing them.

The thing is, I saw example with IntegrationFlow , but if I understand this correctly, integrationFlow is used to get from a channel, and send to another one.

I don't want to send to another channel, I just want to get the payload, to process it.

How can I do this?

All examples I found use xml files to make the configuration, but the project was not created using this way of doing.

Answer 1

I saw example with IntegrationFlow, but if I understand this correctly, integrationFlow is used to get from a channel, and send to another one.

I think that this is not correct information. You can just handle the messages. You can do something like this in a configuration class:

@Bean
public IntegrationFlow myFlow() {
  return IntegrationFlows.from(...)
    .handle((GenericHandler<YourMessage>) (message, headers) -> {...})
}