Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Setting Visibility Timeout in Amazon SQS

When a message is received in Amazon SQS, it remains on the queue until it’s deleted in order to ensure receipt. A message that was received, but not deleted, will be available in subsequent requests after a given visibility timeout to help prevent the message from being received more than once before it can be processed and deleted.

When using standard queues, visibility timeout isn’t a guarantee against receiving a message twice. If you are using a standard queue, be sure that your code can handle the case where the same message has been delivered more than once.

Prerequisites

Before you begin, we recommend you read Getting started using the Amazon SDK for C++.

Download the example code and build the solution as described in Get started on code examples.

To run the examples, the user profile your code uses to make the requests must have proper permissions in Amazon (for the service and the action). For more information, see Providing Amazon credentials.

Set the Message Visibility Timeout upon Message Receipt

When you have received a message, you can modify its visibility timeout by passing its receipt handle in a ChangeMessageVisibilityRequest that you pass to the SQSClient class’ ChangeMessageVisibility member function.

Includes

#include <aws/core/Aws.h>
#include <aws/sqs/SQSClient.h>
#include <aws/sqs/model/ChangeMessageVisibilityRequest.h>
#include <aws/sqs/model/ReceiveMessageRequest.h>
#include <iostream>

Code

    Aws::SQS::Model::ChangeMessageVisibilityRequest request;
    request.SetQueueUrl(queue_url);
    request.SetReceiptHandle(messageReceiptHandle);
    request.SetVisibilityTimeout(visibilityTimeoutSeconds);

    auto outcome = sqsClient.ChangeMessageVisibility(request);
    if (outcome.IsSuccess()) {
        std::cout << "Successfully changed visibility of message " <<
                  messageReceiptHandle << " from queue " << queue_url << std::endl;
    }
    else {
        std::cout << "Error changing visibility of message from queue "
                  << queue_url << ": " <<
                  outcome.GetError().GetMessage() << std::endl;
    }

See the complete example.

More Info