Configuration Options

CredentialSource

Optional

Default: AWS SDK credentials

By default the endpoint uses the SDK to retrieve AWS credentials. The AWS SDK permits a large number of transparent methods for configuring the credentials as outlined in the .NET SDK guidelines.

Example: To manually control the credentials retrieval, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.ClientFactory(() => new AmazonSQSClient(new InstanceProfileAWSCredentials()));

for S3 specify

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ClientFactory(() => new AmazonS3Client(new InstanceProfileAWSCredentials()));

Region

Mandatory

Default: AWS SDK

By default the endpoint uses the SDK to retrieve the default AWS region from the AWS_REGION environment variable.

This is the Amazon Web Services Region in which to access the SQS service. The value must be a valid AWS region code.

Example: To manually control the region, specify

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.ClientFactory(() => new AmazonSQSClient(
    new AmazonSQSConfig { 
        RegionEndpoint = RegionEndpoint.APSoutheast2
    }));

for S3 specify

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ClientFactory(() => new AmazonS3Client(
    new AmazonS3Config
    {
        RegionEndpoint = RegionEndpoint.APSoutheast2
    }));

ProxyHost and ProxyPort

Optional

Default: Empty

This is the name of the host of the proxy server that the client must authenticate to.

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.ClientFactory(() => new AmazonSQSClient(
    new AmazonSQSConfig { 
        ProxyCredentials = new NetworkCredential(userName, password),
        ProxyHost = "127.0.0.1", 
        ProxyPort = 8888 
    }));

for S3 specify

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ClientFactory(() => new AmazonS3Client(
    new AmazonS3Config
    {
        ProxyCredentials = new NetworkCredential(userName, password),
        ProxyHost = "127.0.0.1",
        ProxyPort = 8888
    }));

Client

Optional

Default: new AmazonSQSClient()

By default the transport uses a parameterless constructor to build the SQS client. This overrides the default SQS client with a custom one.

Example: To use a custom client, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.ClientFactory(() => new AmazonSQSClient(new AmazonSQSConfig()));

MaxTTLDays

Optional

Default: 4

This is the maximum number of days that a message will be retained within SQS and S3. When a sent message is not received and successfully processed within the specified time, the message will be lost. This value applies to both SQS and S3 - messages in SQS will be deleted after this amount of time, and large message bodies stored in S3 will automatically be deleted after this amount of time.

The maximum value is 14 days.

Example: To set this to the maximum value, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.MaxTimeToLive(TimeSpan.FromDays(10));

QueueNamePrefix

Optional

Default: None

This string value is prepended to the name of every SQS queue referenced by the endpoint. This is useful when deploying many instances of the same application in the same AWS region (e.g. a development instance, a QA instance, and a production instance), and the queue names must be distinguished from each other.

Example: For a development instance, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.QueueNamePrefix("DEV-");

For example, queue names for the endpoint called "SampleEndpoint" might be:

DEV-SampleEndpoint
DEV-SampleEndpoint-Retries
DEV-SampleEndpoint-Timeouts
DEV-SampleEndpoint-TimeoutsDispatcher

S3BucketForLargeMessages

Optional

Default: Empty. Any attempt to send a large message with an empty S3 bucket will fail.

This is the name of an S3 Bucket that will be used to store message bodies for messages larger than 256kB in size. If this option is not specified, S3 will not be used at all. Any attempt to send a message larger than 256kB will throw an exception if a value is not supplied for this parameter.

If the specified bucket doesn't exist, it will be created when the endpoint starts.

Example: To use a bucket named nsb-sqs-messages, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(
    bucketForLargeMessages: "nsb-sqs-messages",
    keyPrefix: "my/sample/path");

S3KeyPrefix

Optional

Default: Empty

This is the path within the specified S3 Bucket to store large message bodies. If this option is specified without a value for S3BucketForLargeMessages, an exception will be thrown.

S3 Client

Optional

Default: new AmazonS3Client()

By default the transport uses a parameterless constructor to build the S3 client. This overrides the default S3 client with a custom one.

Example: To use a custom client, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ClientFactory(() => new AmazonS3Client(new AmazonS3Config()));

ServerSideEncryption

Optional

Default: Null

Specifies the server-side encryption method and an optional key management service key ID to be used when storing large message bodies on S3. If this option is specified in addition to server-side customer encryption, an exception will be thrown.

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ServerSideEncryption(ServerSideEncryptionMethod.AES256, keyManagementServiceKeyId: "keyId");

ServerSideCustomerEncryption

Optional

Default: Null

Specifies the server-side customer encryption method, the encryption key and an optional MD5 of the provided key to be used when storing and retrieving large message bodies using S3. If this option is specified with an empty key or in addition to server-side encryption, an exception will be thrown.

var transport = endpointConfiguration.UseTransport<SqsTransport>();
var s3Configuration = transport.S3(bucketName, keyPrefix);
s3Configuration.ServerSideCustomerEncryption(ServerSideEncryptionCustomerMethod.AES256, "key", providedKeyMD5: "keyMD5");

V1 Compatibility Mode

Optional

Default: Disabled

This option enables serialization of the TimeToBeReceived and ReplyToAddress message headers in the message envelope for compatibility with endpoints using version 1 of the transport.

Example: To enable version 1 compatibility, specify:

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.EnableV1CompatibilityMode();

Unrestricted Delayed Delivery

Optional

Default: disabled

SQS supports delaying message delivery by up to 15 minutes natively. To delay messages longer than 15 minutes, the unrestricted delayed delivery mode has to be enabled.

Example

var transport = endpointConfiguration.UseTransport<SqsTransport>();
transport.UnrestrictedDurationDelayedDelivery();

For a detailed overview about the unrestricted delayed delivery feature, refer to the delayed delivery documentation.