spring-integration - Spring Integration Java DSL : How to route with the channelMapping method to the channel which name is in the headers?

Question

如何使用 channelMapping 方法路由到名称在标题中的 channel ？所以如果我试试这个

    @Bean
    private IntegrationFlow postDataToChannelX() {
            return f -> f
            ...
               .<String, Boolean> route(s -> s.equals("[]"), m -> m
                    .channelMapping(false, "headers['channelName']")
                    .channleMapping(true, ...);
    }

来了

Caused by: org.springframework.messaging.core.DestinationResolutionException: failed to look up MessageChannel with name 'headers['channelName']' in the BeanFactory.; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'headers['channelName']' available

Answer 1

你可以这样做:

.route(Message.class, (m) -> m.getHeaders().get("channelName"))

因此，您根本不需要任何映射，因为您直接在路由函数中解析到目标 channel 。