com.amazonaws.services.sqs.buffered.QueueBufferCallback Maven / Gradle / Ivy

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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.services.sqs.buffered;

import com.amazonaws.AmazonWebServiceRequest;
import com.amazonaws.handlers.AsyncHandler;

/**
 * This class combines the handler we are supposed to call after the request is
 * completed and the original request object. The reason to hold on to the
 * original request is that we have to provide it to the async handler on
 * successful completion. Storing the request object here means we don't have to
 * store it in the classes that do actual work. Those classes tend to forget
 * about the request objects as soon as the required data was extracted from
 * them.
 * */
class QueueBufferCallback {
    
    private final AsyncHandler handler;
    private final RequestType request;
    public QueueBufferCallback(
            AsyncHandler paramHandler,
            RequestType request) {
        this.handler = paramHandler;
        this.request = request;
    }
    
    public void onError(Exception e) {
        if ( null != handler )
            handler.onError(e);
    }
    
    public void onSuccess( ResultType result) {
        if ( null != handler )
            handler.onSuccess(request, result);
    }

}