我在流程中有一个进行ReST API调用的部分：

<int:channel id="requestChannel"/>

<int-http:outbound-gateway request-channel="requestChannel"
                           reply-channel="logger"
                           url="${api.base.uri}/data"
                           http-method="PUT"
                           expected-response-type="java.lang.String"/>

<int:logging-channel-adapter id="logger"
                             logger-name="logger"
                             expression="payload"
                             level="INFO"/>

我试图使用Java DSL复制它,但找不到足够的文档.任何帮助将非常感激.

解决方法:

是的,Spring Integration Java DSL还没有提供HTTP的命名空间工厂.

无论如何,我们可以继续使用其通用组件来做到这一点：

    @Bean
    public MessageHandler logger() {
        LoggingHandler loggingHandler = new LoggingHandler("INFO");
        loggingHandler.setLoggerName("logger");
        // This is redundant because the default expression is exactly "payload"
        // loggingHandler.setExpression("payload");
        return loggingHandler;
    }

    @Bean
    public MessageHandler httpGateway(@Value("${api.base.uri}/data") URI uri) {
        HttpRequestExecutingMessageHandler httpHandler = new HttpRequestExecutingMessageHandler(uri);
        httpHandler.setExpectedResponseType(String.class);
        httpHandler.setHttpMethod(HttpMethod.PUT);
        return httpHandler;
    }

    @Bean
    public IntegrationFlow httpFlow(MessageHandler httpGateway) {
        return IntegrationFlows.from("requestChannel")
                .handle(httpGateway)
                .handle(logger())
                .get();
    }

从另一方面来看,所提到的文档完全展示了HttpRequestHandlingMessagingGateway的样本……

UPDATE

顺便说一下：随意提出一个JIRA票据,为Java DSL添加HTTP支持.