ResponseEntity not producing any output to curl or postman-CodePudding

Having an odd issue where I am able to send requests to my local spring boot web api via CURL i.e curl -X POST -H "Content-Type: application/json" -d '{"userName":"bob","textMessage":"newMessage","timeOut":500}' http://localhost:8080/chats

curl -X GET -H "Content-Type: application/json" http://localhost:8080/chats/username/bob

curl -X GET -H "Content-Type: application/json" http://localhost:8080/chats/id/b4f1a2c6-74e7-444f-abc9-a72fc61ec515

Here is the POST method

 @PostMapping
    @Async
    public ResponseEntity<String> postMessage(@RequestBody Messages message ){
        if(message.getUserName() == null || message.getTextMessage() == null){
            System.out.println("No Username or TextMessage");
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }
        if(message.getTimeOut() !=null && message.getTimeOut() < 0){
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }
        String id = UUID.randomUUID().toString();
        message.setTextId(id);
        if(message.getTimeOut() == null) {
            message.setTimeOut(60);
            message.setTimeOutDate(60*1000 System.currentTimeMillis());
        }
        else{
            message.setTimeOutDate(message.getTimeOut()*1000 System.currentTimeMillis());
        }
        System.out.println("Attempting save");
        messagesRepository.save(message);
        return new ResponseEntity<>("id: " id, HttpStatus.CREATED);

    }

I am not getting any output of any kind.

Please advise.

Edit: Image of curl command not returning anything for the post, but in backend we see it working

Edit 2: Ive printed out the reponseentity and it has the correct content, so the error is the return not actually outputting

CodePudding user response：

It is because you have @Async annotation on your controller, which is releasing the container thread immediately and processing your task asynchronously in another thread.

@Async can be used for fire-and-forget scenarios, such as sending an email, kicking off a database job, some long-running background task. Caller immediately gets the response, while a background job continues processing.