因此，我已经为kafka出站消息适配器配置了成功和失败通道，以便可以根据kafka发布的结果进行一些后处理

@Bean
public KafkaProducerMessageHandler<String, String> kafkaProducerMessageHandler() {
    KafkaProducerMessageHandler<String, String> handler = new KafkaProducerMessageHandler<>(kafkaTemplate());
    handler.setHeaderMapper(mapper());
    handler.setLoggingEnabled(TRUE);
    handler.setTopicExpression(
            new SpelExpressionParser()
                    .parseExpression(
                            "headers['" + upstreamType + "'] + '_' + headers['" + upstreamTypeInstance + "']"));
    handler.setMessageKeyExpression(new SpelExpressionParser().parseExpression("payload['key']"));
    handler.setSendSuccessChannel(kafkaPublishSuccessChannel());
    handler.setSendFailureChannel(kafkaFailuresChannel());
    return handler;
}

然后我将一个服务激活器连接到这个成功通道，它也将成功发送的消息保存到消息存储中

@Bean
public SubscribableChannel kafkaPublishSuccessChannel() {
    return MessageChannels.direct("kafkaSuccessChannel").get();
}
@Bean
@ServiceActivator(inputChannel = "kafkaSuccessChannel")
public MongoDbStoringMessageHandler mongoDbOutboundGateway() {
    MongoDbStoringMessageHandler mongoHandler = new MongoDbStoringMessageHandler(mongoDbFactory);
    mongoHandler.setMongoConverter(mongoConverter);
    mongoHandler.setLoggingEnabled(TRUE);
    SpelExpressionParser parser = new SpelExpressionParser();
    mongoHandler.setCollectionNameExpression(
            parser.parseExpression(
                    "headers['" + upstreamType + "'] + '_'+ headers['" + upstreamTypeInstance + "'] + '_' + headers['" + upstreamWebhookSource + "']"));
    return mongoHandler;
}

我希望在发布成功的情况下调用serviceactivator，但这不会发生，

@Test
public void testPushNotificationIsSavedToMongo(
        @Value("classpath:webhooks/jira/test-payload.json") Resource jiraWebhookPayload) throws IOException, InterruptedException {
    //publish messsge to KAfka TOpic
      ...
    //assert message saved in MongoDB
    assertThat(mongoTemplate.findAll(DBObject.class, "alm_jira_some-project")).extracting("key")
            .containsOnly("JRASERVER-2000");
}

最后一个Assert失败，并且在日志中，我没有看到在producer发布到topic之后对success通道的任何调用。