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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2012-2014 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
package com.amazonaws.handlers;

import com.amazonaws.AmazonWebServiceRequest;

/**
 * Callback interface for notification on web service requests executed with the
 * asynchronous clients in the AWS SDK for Java.
 */
public interface AsyncHandler {

	/**
	 * Invoked after an asynchronous request 
	 * @param exception
	 */
	public void onError(Exception exception);

	/**
	 * Invoked after an asynchronous request has completed successfully. Callers
	 * have access to the original request object and the returned response
	 * object.
	 *
	 * @param request
	 *            The initial request created by the caller
	 * @param result
	 *            The successful result of the executed operation.
	 */
	public void onSuccess(REQUEST request, RESULT result);

}