Can I get original message after response

Question

Can you help me with spring integration.

I have Integration flow for send post request to other system with http.

Can I get original message after sending it, because I wanna do other operations on success and error.

ErrorHandler just has HttpClientResponse, but response body is empty and I need originalMessage to handle this situation.

The same situation with success response. I don't have original message information to do next operation.

@Configuration
public class IntegrationConfiguration {

    @Bean
    public IntegrationFlow incChannel(HeaderEnricher enrichHeaders,
                                      HttpRequestExecutingMessageHandler notifyOnArrival) {
        return IntegrationFlows
                .from("send_notify_to")
                .transform(enrichHeaders)
                .handle(notifyOnArrival)
                .channel("save_success_status_original")
                .get();
    }

    @Bean
    public HeaderEnricher enrichHeaders() {
        Map<String, ? extends HeaderValueMessageProcessor<?>> headersToAdd =
                Collections.singletonMap("Content-Type", new StaticHeaderValueMessageProcessor<>(APPLICATION_JSON_VALUE));
        HeaderEnricher enricher = new HeaderEnricher(headersToAdd);
        return enricher;
    }

    @Bean
    HttpRequestExecutingMessageHandler notifyOnArrival(@Value("${uri}") String uri,
                                                          MappingJackson2HttpMessageConverter messageConverter) {

        HttpRequestExecutingMessageHandler handler =
                new HttpRequestExecutingMessageHandler(uri + "/api/notify");
        handler.setHttpMethod(HttpMethod.POST);
        handler.setExpectReply(false);
        handler.setMessageConverters(Arrays.asList(messageConverter));
        return handler;
    }

}

score 0 · Accepted Answer · answered Oct 28 '20 at 14:58

0

The .handle(notifyOnArrival) is just a Service Activator with all the state carrying from the request to reply. Only what we need is to ensure that we really provide that state. the best place to keep a state in the context of the message is to store the request message into headers and then restore it from there in the reply afterward or from the ErrorMessage.

headersToAdd.put("originalMesasge", new ExpressionEvaluatingHeaderValueMessageProcessor("#root", Message.class));

So, you add that originalMesasge from the request message and this one is going to be copying by the Service Activator logic into the reply message.

answered Oct 28 '20 at 14:58

Artem Bilan

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Thanks, yeah, I see. But it start to work only with reply handler.setExpectReply(false); should be true – Shakirov Ramil Oct 28 '20 at 15:01
1

You probably need to see if you can add an expression advice to the endpoint for your REST call: https://docs.spring.io/spring-integration/docs/current/reference/html/messaging-endpoints.html#message-handler-advice-chain – Artem Bilan Oct 28 '20 at 15:02
I change HttpRequestExecutingMessageHandler to HTTP builder initialization, but it init with expectedReply(false), and this method is protected and I can't call it. Why it made so? – Shakirov Ramil Oct 29 '20 at 09:25

Can I get original message after response

1 Answers1