ReceiveMessageRequest

This parameter has been discontinued but will be supported for backward compatibility. To provide attribute names, you are encouraged to use MessageSystemAttributeNames.

The maximum number of messages to return. Amazon SQS never returns more messages than this value (however, fewer messages might be returned). Valid values: 1 to 10. Default: 1.

The name of the message attribute, where N is the index.

A list of attributes that need to be returned along with each message. These attributes include:

The URL of the Amazon SQS queue from which messages are received.

This parameter applies only to FIFO (first-in-first-out) queues.

The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request. If not specified, the default visibility timeout for the queue is used, which is 30 seconds.

The duration (in seconds) for which the call waits for a message to arrive in the queue before returning. If a message is available, the call returns sooner than WaitTimeSeconds. If no messages are available and the wait time expires, the call does not return a message list. If you are using the Java SDK, it returns a ReceiveMessageResponse object, which has a empty list instead of a Null object.