Can Volley Achieve Synchronous Request Execution in a Background Service?

Can Synchronicity Be Achieved with Volley?

Background:

Imagine being within a Service running on a background thread. Is it possible to implement a Volley request within this thread, ensuring synchronous callback execution? This approach has two motivations:

• Eliminating the need for an additional thread and avoiding resource wastage.
• Preventing thread termination before callback execution, especially in ServiceIntents.

Solution Using Volley's RequestFuture:

Volley's RequestFuture class provides a mechanism for synchronous requests. Here's how to perform a synchronous JSON HTTP GET request:

RequestFuture<JSONObject> future = RequestFuture.newFuture();
JsonObjectRequest request = new JsonObjectRequest(URL, new JSONObject(), future, future);
requestQueue.add(request);

try {
  JSONObject response = future.get(); // this will block
} catch (InterruptedException e) {
  // exception handling
} catch (ExecutionException e) {
  // exception handling
}

In this code:

• RequestFuture creates a future object for the JSON response.
• JsonObjectRequest is a Volley request for fetching JSON data.
• requestQueue.add(request) enqueues the request.
• future.get() blocks the thread until the response is available or an exception occurs.

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