Release: AWS SDK for .NET 1.3.15

Delay queues can be used to apply a uniform delay to all messages. Alternatively, message timers can be used to apply a delay to specific messages that can be sent individually, or in a batch.

This example creates a queue and specifies that all messages should be delayed by 10 seconds:

var response = sqsClient.CreateQueue(new CreateQueueRequest
{
    QueueName = "TestDelayQueue",
    DelaySeconds = 10
});
sqsClient.SendMessage(new SendMessageRequest
{
    QueueUrl = response.CreateQueueResult.QueueUrl,
    MessageBody = "Test message sent after 10 second delay"
});
        

This example sends a message and applies a 30 second delay before it is sent. Delays specified at the message level override any set for the queue itself:

sqsClient.SendMessage(new SendMessageRequest
{
    QueueUrl = response.CreateQueueResult.QueueUrl,
    MessageBody = "Test message sent after 30 second delay",
    DelaySeconds = 30
});
        

For more information on using Amazon SQS delay queue and message timer operations, please see the Amazon SQS Developer Guide.

Batch send and delete operations complement the existing batch receive functionality. With batch operations many workloads will benefit from improved single thread message throughput, reduced connection overhead and lower API call latencies.

This example sends 3 messages to a queue:

var response = sqsClient.CreateQueue(new CreateQueueRequest
{
    QueueName = "TestQueue"
});

List<SendMessageBatchRequestEntry> messages = new List<SendMessageBatchRequestEntry>
{
    new SendMessageBatchRequestEntry{ Id = "1", MessageBody = "Message 1" },
    new SendMessageBatchRequestEntry{ Id = "2", MessageBody = "Message 2" },
    new SendMessageBatchRequestEntry{ Id = "3", MessageBody = "Message 3" }
}

sqsClient.SendMessageBatch(new SendMessageBatchRequest
{
    QueueUrl = response.CreateQueueResult.QueueUrl,
    Entries = messages
});
        

Per-message delay settings can also be specified on each SendMessageBatchRequestEntry.

For more information on using Amazon SQS batch operations, please see the Amazon SQS Developer Guide.

AWS clients can now retrieve credentials directly from an application's AppSettings using new parameterless constructors.

Given the following AppSettings entries:

<appSettings>
    <add key="AWSAccessKey" value="your access key here"/>
    <add key="AWSSecretKey" value="your secret key here"/>
</appSettings>
        

A service client can now be created with:

AmazonS3 s3Client = AWSClientFactory.CreateAmazonS3Client();
        

Or alternatively with:

AWSCredentials credentials = new EnvironmentAWSCredentials();
AmazonS3 s3Client = new AmazonS3Client(credentials);
        

Fixed an issue causing ArgumentNullExceptions to be thrown during certain IO exceptions, causing retries to fail.

Fixed an issue where calling AmazonS3Util.SetObjectStorageClass changed the server-side encryption setting for an object.

Added new utility method AmazonS3Util.SetServerSideEncryption.