面对Spring Integration Java-DSL问题,我陷入了困境。这是我用于流程声明的代码:
@Bean
public IntegrationFlow orchestrationFlow() {
return IntegrationFlows.from(
Jms.messageDrivenChannelAdapter(queueConnectionFactory())
.destination(bookingQueue())
.outputChannel(bookingChannel()))
.<String, BookingRequest>transform(s -> {
Ticket t = new Gson().fromJson(s, Ticket.class);
return new BookingRequest()
.setMovieId(t.getMovie().getId())
.setRow(t.getSeat().getRow())
.setSeat(t.getSeat().getNumber())
.setScreenNumber(t.getScreenNumber()
);
})
// HTTP part goes here
.<BookingRequest, HttpEntity>transform(HttpEntity::new)
.handle(
Http.outboundChannelAdapter(bookingServerUrl)
.httpMethod(HttpMethod.POST)
.extractPayload(true)
.expectedResponseType(BookStatus.class)
)
// and here HTTP part ends
.handle(
Jms.outboundAdapter(responseDestinationTemplate())
)
.get();
}
一切正常,直到我利用HTTP出站通道适配器。我需要调用简单的RESTful接口,上面的代码做得很好。但是,以下Jms.outboundAdapter(responseDestinationTemplate())
行无济于事,成功的http调用后不会执行任何操作。
如果我删除了http flow部分(被注释包围)-它可以工作。实施了如此多的东西,几乎被理解并看到了集成的美丽和简单...就是这样。我被困在另一个地方。
这是成功的REST调用后的日志:
2016-02-08 21:01:22.155 DEBUG 18209 --- [enerContainer-1] o.s.web.client.RestTemplate : POST request for "http://localhost:9052/api/book" resulted in 200 (OK)
2016-02-08 21:01:22.156 DEBUG 18209 --- [enerContainer-1] o.s.web.client.RestTemplate : Reading [class c.e.m.integration.domain.BookStatus] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@6b9469bd]
2016-02-08 21:01:22.168 DEBUG 18209 --- [enerContainer-1] i.h.o.HttpRequestExecutingMessageHandler : handler 'org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler#0' produced no reply for request Message: GenericMessage [payload=<BookingRequest(movieId=0, row=1, seat=1, screenNumber=1),{}>, headers={jms_redelivered=false, jms_replyTo=queue://statusChannel, jms_correlationId=5021291a-d4d5-47ca-b591-b6f311378688, correlationId=1d41f05a-3695-4adb-87b0-d75c17bbc3ad, id=a1fb2a2f-5d78-3183-d409-3f60aae74a20, priority=4, jms_timestamp=1454950877264, jms_messageId=ID:ins-laptop-31198-1454948247657-1:9:1:1:1, timestamp=1454950877352}]
2016-02-08 21:01:22.168 DEBUG 18209 --- [enerContainer-1] o.s.integration.channel.DirectChannel : postSend (sent=true) on channel 'inboundFlow.channel#2', message: GenericMessage [payload=<BookingRequest(movieId=0, row=1, seat=1, screenNumber=1),{}>, headers={jms_redelivered=false, jms_replyTo=queue://statusChannel, jms_correlationId=5021291a-d4d5-47ca-b591-b6f311378688, correlationId=1d41f05a-3695-4adb-87b0-d75c17bbc3ad, id=a1fb2a2f-5d78-3183-d409-3f60aae74a20, priority=4, jms_timestamp=1454950877264, jms_messageId=ID:ins-laptop-31198-1454948247657-1:9:1:1:1, timestamp=1454950877352}]
2016-02-08 21:01:22.168 DEBUG 18209 --- [enerContainer-1] o.s.integration.channel.DirectChannel : postSend (sent=true) on channel 'inboundFlow.channel#1', message: GenericMessage [payload=BookingRequest(movieId=0, row=1, seat=1, screenNumber=1), headers={jms_redelivered=false, jms_replyTo=queue://statusChannel, jms_correlationId=5021291a-d4d5-47ca-b591-b6f311378688, correlationId=1d41f05a-3695-4adb-87b0-d75c17bbc3ad, id=859af23d-214f-4400-e9cb-7d40308755cd, priority=4, jms_timestamp=1454950877264, jms_messageId=ID:ins-laptop-31198-1454948247657-1:9:1:1:1, timestamp=1454950877350}]
2016-02-08 21:01:22.168 DEBUG 18209 --- [enerContainer-1] o.s.integration.channel.DirectChannel : postSend (sent=true) on channel 'inboundFlow.channel#0', message: GenericMessage [payload={"screenNumber":1,"seat":{"row":1,"number":1},"movie":{"id":0,"name":"The Matrix"}}, headers={jms_redelivered=false, jms_replyTo=queue://statusChannel, jms_correlationId=5021291a-d4d5-47ca-b591-b6f311378688, correlationId=1d41f05a-3695-4adb-87b0-d75c17bbc3ad, id=636638ed-aec2-082e-6181-0484999fd807, priority=4, jms_timestamp=1454950877264, jms_messageId=ID:ins-laptop-31198-1454948247657-1:9:1:1:1, timestamp=1454950877331}]
没有错误,没有任何警告。
Spring Integration提供两种MessageHandler
类型:单向-仅处理消息和停止。另一个类似:处理请求消息并产生对输出通道的答复。
第一个称为outboundChannelAdapter
,对于您的HTTP情况,您仅发送POST请求,而不必担心答复。
由于消息流已停止,因此outboundChannelAdapter
在集成链中无法采取任何其他措施。就像您的情况一样,下一个Jms.outboundAdapter
将无法到达。
如果您真的希望reply
REST服务提供服务,则应改用REST服务Http.outboundGateway
。您BookStatus
将.handle()
在流程中的最后一个发送给您的JMS 。
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我来说两句