Spring cloud stream messaging system(RabbitMQ) implementation using Rest Controller(Restful API) - spring

Question

From past few days i'm trying to implement the Spring cloud stream messaging system using RestController, but it is not happening through the current implementation.
For this sample code i'm going to add RestController
#EnableBinding(Source.class)
#EnableConfigurationProperties(TimeSourceOptionsMetadata.class)
public class TimeSource {
#Autowired
private TimeSourceOptionsMetadata options;
#InboundChannelAdapter(value = Source.OUTPUT)
public String timerMessageSource() {
return new SimpleDateFormat(this.options.getFormat()).format(new Date());
}
}
But the #InboundChannelAdapter cannot accept any parameters from RequestMapping Get Method URL.At the end what i need is to add message to the broker using Restful API Get method from api call. which is the best way to do it?, I couldn't figure out any best process from internet.

Answer 1

spring cloud team already provided a source application that listens for HTTP requests and emits the body as a message payload. If the Content-Type matches text/* or application/json, the payload will be a String, otherwise the payload will be a byte array.
github link
You can go with this or if you want to write it yourself, you can do it like below:
#RestController
#EnableBinding(Source.class)
public class RestSource {
#Autowired
private Source channels;
#RequestMapping(path = "/", method = POST, consumes = {"application/json" })
#ResponseStatus(HttpStatus.ACCEPTED)
public void handleRequest(#RequestBody String body, #RequestHeader(HttpHeaders.CONTENT_TYPE) Object contentType) {
sendMessage(body, contentType);
}
private void sendMessage(Object body, Object contentType) {
channels.output().send(MessageBuilder.createMessage(body,
new MessageHeaders(Collections.singletonMap(MessageHeaders.CONTENT_TYPE, contentType))));
}
}