弹簧座控制器，带和不带可调用

Question

First I wrote simple spring REST controller

 @RequestMapping(value = "/id", method = RequestMethod.GET)
    public String getDetails(@PathVariable("id") String id) {
       // wrote logic for JSON response....
}

Second we need to improve the performance so I wrote controller using Callable like this

@RequestMapping(value = "/id", method = RequestMethod.GET)
        public String getDetails(@PathVariable("id") String id) {
          return new Callable<String>(){
          @Override
          public String call() throws Exception {
           // ...
          return "someJSONString";
         }
       }
    }

Now the problem is when I compare the performance using JMETER for both above methods I dont see any major differences.

So do I miss anything while writing Callable controller?

Answer 1

you can not improve single request performance with using Callable interface, it helps to take more request in some cases. If your response type would be void, you can use runnable instead of callable, so with using runnable you can improve single request response time. For example, if your service is suitable for fork/join framework try it.