Access main thread variable values in callback method

[shawn peter]

I am calling Rest API using AsyncRestTemplate inside a loop. Once callback returns i need to access main thread values. But the issue is i am calling AsyncRestTemplate inside a loop as below .

for(int x=0;x<List.size();x++){	
AsyncRestTemplate template = new AsyncRestTemplate();

ListenableFuture><ResponseEntity><String>> future = restTemplate.exchange(url, HttpMethod.POST, entity,String.class);


 future .addCallback(new ListenableFutureCallback<ResponseEntity><User>>() {
        @Override
        public void onSuccess(ResponseEntity<User> result) {
           
        }

        @Override
        public void onFailure(Throwable ex) {
         
        }
    });
				
}

inside callback i need t oaccess list values. but issue is since this runs  inside a loop when callback comes loop may in a different iteration. So how can i access the same values when i am calling exchange methos ?

[Paul Clapham]

You haven't said what's preventing you from using the variables in question, or even what those variables are, but in the absence of that I will just suggest that you declare the variables to be final.

If that isn't the answer you want, then go ahead and post more details.

[shawn peter]

actually i need to get the value from each callback. for example i have a list which contain 10 items. So that means there will be 10 call backs. So each call back i need to access the list and get relevant  value. For example for the 1st iteration  i need to get 1st value of list, but when callback comes the i value of iteration may changed to different value. So how do i know 1st iteration callback comes which items to get from the list?