/**
* Copyright 2016 LinkedIn Corp. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*/
package com.github.ambry.router;
/**
* A callback interface that the user can implement to allow code to execute when the request is complete. This callback
* will generally execute in the background I/O thread so it should be fast.
*/
public interface Callback<T> {
/**
* The callback method that the user can implement to do asynchronous handling of the response. T defines the type of
* the result. When T=Void then there is no specific response expected but any errors are reported on the
* exception object. For all other values of T, one of the two arguments would be null.
* @param result The result of the request. This would be non null when the request executed successfully
* @param exception The exception that was reported on execution of the request
*/
public void onCompletion(T result, Exception exception);
}