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Retrieves one or more messages (up to 10), from the specified queue. Using the
parameter enables long-poll support. For more information, see Amazon
SQS Long Polling in the Amazon SQS Developer Guide.
Short poll is the default behavior where a weighted random set of machines is sampled
ReceiveMessage call. Thus, only the messages on the sampled machines
are returned. If the number of messages in the queue is small (fewer than 1,000),
you most likely get fewer messages than you requested per
call. If the number of messages in the queue is extremely small, you might not receive
any messages in a particular
ReceiveMessage response. If this happens,
repeat the request.
For each message returned, the response includes the following:
The message body.
An MD5 digest of the message body. For information about MD5, see RFC1321.
MessageId you received when you sent the message to the queue.
The receipt handle.
The message attributes.
An MD5 digest of the message attributes.
The receipt handle is the identifier you must provide when deleting the message. For more information, see Queue and Message Identifiers in the Amazon SQS Developer Guide.
You can provide the
VisibilityTimeout parameter in your request. The
parameter is applied to the messages that Amazon SQS returns in the response. If you
don't include the parameter, the overall visibility timeout for the queue is used
for the returned messages. For more information, see Visibility
Timeout in the Amazon SQS Developer Guide.
A message that isn't deleted or a message whose visibility isn't extended before the visibility timeout expires counts as a failed receive. Depending on the configuration of the queue, the message might be sent to the dead-letter queue.
In the future, new attributes might be added. If you write code that calls this action, we recommend that you structure your code so that it can handle new attributes gracefully.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginReceiveMessage and EndReceiveMessage.
public virtual Task<ReceiveMessageResponse> ReceiveMessageAsync( String queueUrl, CancellationToken cancellationToken )
The URL of the Amazon SQS queue from which messages are received. Queue URLs and names are case-sensitive.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
|OverLimitException||The specified action violates a limit. For example, ReceiveMessage returns this error if the maximum number of inflight messages is reached and AddPermission returns this error if the maximum number of permissions for the queue is reached.|
.NET Core App:
Supported in: 3.1
Supported in: 2.0
Supported in: 4.5