paulwong

Error handling in spring integration - How to get all the errors thrown in multiple threads and send them to the error-channel

在SPRING INTEGRATION中,如果exception发生在各种thread里时,如何将exception返回到指定的channel,之后再绕回到aggrator-channel中。

@Bean
public IntegrationFlow provisionUserFlow() {
return
    IntegrationFlows.from("input.channel")
    .publishSubscribeChannel(Executors.newCachedThreadPool(),
        s -> s.applySequence(true)
            .subscribe(f -> f.enrichHeaders(e -> e.header(MessageHeaders.ERROR_CHANNEL, "errorChannel", true))
                .handle(provisionerA, "provision")
                .channel("aggregatorChannel")
            )
            .subscribe(f -> f.enrichHeaders(e -> e.header(MessageHeaders.ERROR_CHANNEL, "errorChannel", true))
                .handle(provisionerB, "provision")
                .channel("aggregatorChannel"))
            )
        .get();
}

@Bean
public IntegrationFlow aggregateFlow() {
    return IntegrationFlows.from("aggregatorChannel")
                    .channel( aggregatorChannel)
                    .aggregate( a -> a.processor( collect, "aggregatingMethod"))
                    .get();
}

@Transformer( inputChannel = "errorChannel", outputChannel = "aggregatorChannel")
public Message<?> errorChannelHandler(ErrorMessage errorMessage) throws RuntimeException {

    Message<?> failedMessage =  ((MessagingException) errorMessage.getPayload()).getFailedMessage();

    Exception exception = (Exception) errorMessage.getPayload();

    return  MessageBuilder.withPayload( exception.getMessage())
                                       .copyHeadersIfAbsent( failedMessage.getHeaders() )
                                       .build();
}


https://stackoverflow.com/q/46495127/11790720

posted on 2020-10-15 19:21 paulwong 阅读(65) 评论(0)  编辑  收藏 所属分类: SPRINGSPRING INTERGRATION


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