AWS Tools for Windows PowerShell
Command Reference

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Synopsis

Invokes the ReceiveMessage operation against Amazon Simple Queue Service.

Syntax

Receive-SQSMessage
-QueueUrl <String>
-MessageCount <Int32>
-VisibilityTimeout <Int32>
-AttributeName <String[]>
-WaitTimeInSeconds <Int32>
-MessageAttributeName <String[]>
-ReceiveRequestAttemptId <String>
-Force <SwitchParameter>

Description

Retrieves one or more messages (up to 10), from the specified queue. Using the WaitTimeSeconds 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 on a 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 ReceiveMessage 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.
  • The 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.

Parameters

-AttributeName <String[]>
A list of attributes that need to be returned along with each message. These attributes include:
  • All - Returns all values.
  • ApproximateFirstReceiveTimestamp - Returns the time the message was first received from the queue (epoch time in milliseconds).
  • ApproximateReceiveCount - Returns the number of times a message has been received from the queue but not deleted.
  • SenderId
    • For an IAM user, returns the IAM user ID, for example ABCDEFGHI1JKLMNOPQ23R.
    • For an IAM role, returns the IAM role ID, for example ABCDE1F2GH3I4JK5LMNOP:i-a123b456.
  • SentTimestamp - Returns the time the message was sent to the queue (epoch time in milliseconds).
  • MessageDeduplicationId - Returns the value provided by the sender that calls the SendMessage action.
  • MessageGroupId - Returns the value provided by the sender that calls the SendMessage action. Messages with the same MessageGroupId are returned in sequence.
  • SequenceNumber - Returns the value provided by Amazon SQS.
Any other valid special request parameters (such as the following) are ignored:
  • ApproximateNumberOfMessages
  • ApproximateNumberOfMessagesDelayed
  • ApproximateNumberOfMessagesNotVisible
  • CreatedTimestamp
  • ContentBasedDeduplication
  • DelaySeconds
  • FifoQueue
  • LastModifiedTimestamp
  • MaximumMessageSize
  • MessageRetentionPeriod
  • Policy
  • QueueArn,
  • ReceiveMessageWaitTimeSeconds
  • RedrivePolicy
  • VisibilityTimeout
Required?False
Position?4
Accept pipeline input?False
-Force <SwitchParameter>
This parameter overrides confirmation prompts to force the cmdlet to continue its operation. This parameter should always be used with caution.
Required?False
Position?Named
Accept pipeline input?False
-MessageAttributeName <String[]>
The name of the message attribute, where N is the index.
  • The name can contain alphanumeric characters and the underscore (_), hyphen (-), and period (.).
  • The name is case-sensitive and must be unique among all attribute names for the message.
  • The name must not start with AWS-reserved prefixes such as AWS. or Amazon. (or any casing variants).
  • The name must not start or end with a period (.), and it should not have periods in succession (..).
  • The name can be up to 256 characters long.
When using ReceiveMessage, you can send a list of attribute names to receive, or you can return all of the attributes by specifying All or .* in your request. You can also use all message attributes starting with a prefix, for example bar.*.
Required?False
Position?Named
Accept pipeline input?False
-MessageCount <Int32>
The maximum number of messages to return. Amazon SQS never returns more messages than this value (however, fewer messages might be returned). Valid values are 1 to 10. Default is 1.
Required?False
Position?2
Accept pipeline input?False
-QueueUrl <String>
The URL of the Amazon SQS queue from which messages are received.Queue URLs are case-sensitive.
Required?False
Position?1
Accept pipeline input?True (ByValue, ByPropertyName)
-ReceiveRequestAttemptId <String>
This parameter applies only to FIFO (first-in-first-out) queues.The token used for deduplication of ReceiveMessage calls. If a networking issue occurs after a ReceiveMessage action, and instead of a response you receive a generic error, you can retry the same action with an identical ReceiveRequestAttemptId to retrieve the same set of messages, even if their visibility timeout has not yet expired.
  • You can use ReceiveRequestAttemptId only for 5 minutes after a ReceiveMessage action.
  • When you set FifoQueue, a caller of the ReceiveMessage action can provide a ReceiveRequestAttemptId explicitly.
  • If a caller of the ReceiveMessage action doesn't provide a ReceiveRequestAttemptId, Amazon SQS generates a ReceiveRequestAttemptId.
  • You can retry the ReceiveMessage action with the same ReceiveRequestAttemptId if none of the messages have been modified (deleted or had their visibility changes).
  • During a visibility timeout, subsequent calls with the same ReceiveRequestAttemptId return the same messages and receipt handles. If a retry occurs within the deduplication interval, it resets the visibility timeout. For more information, see Visibility Timeout in the Amazon Simple Queue Service Developer Guide.If a caller of the ReceiveMessage action is still processing messages when the visibility timeout expires and messages become visible, another worker reading from the same queue can receive the same messages and therefore process duplicates. Also, if a reader whose message processing time is longer than the visibility timeout tries to delete the processed messages, the action fails with an error.To mitigate this effect, ensure that your application observes a safe threshold before the visibility timeout expires and extend the visibility timeout as necessary.
  • While messages with a particular MessageGroupId are invisible, no more messages belonging to the same MessageGroupId are returned until the visibility timeout expires. You can still receive messages with another MessageGroupId as long as it is also visible.
  • If a caller of ReceiveMessage can't track the ReceiveRequestAttemptId, no retries work until the original visibility timeout expires. As a result, delays might occur but the messages in the queue remain in a strict order.
The length of ReceiveRequestAttemptId is 128 characters. ReceiveRequestAttemptId can contain alphanumeric characters (a-z, A-Z, 0-9) and punctuation (!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~).For best practices of using ReceiveRequestAttemptId, see Using the ReceiveRequestAttemptId Request Parameter in the Amazon Simple Queue Service Developer Guide.
Required?False
Position?Named
Accept pipeline input?False
-VisibilityTimeout <Int32>
The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request.
Required?False
Position?3
Accept pipeline input?False
-WaitTimeInSeconds <Int32>
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 returns successfully with an empty list of messages.
Required?False
Position?5
Accept pipeline input?False

Common Credential and Region Parameters

-AccessKey <String>
The AWS access key for the user account. This can be a temporary access key if the corresponding session token is supplied to the -SessionToken parameter.
Required? False
Position? Named
Accept pipeline input? False
-Credential <AWSCredentials>
An AWSCredentials object instance containing access and secret key information, and optionally a token for session-based credentials.
Required? False
Position? Named
Accept pipeline input? False
-ProfileLocation <String>

Used to specify the name and location of the ini-format credential file (shared with the AWS CLI and other AWS SDKs)

If this optional parameter is omitted this cmdlet will search the encrypted credential file used by the AWS SDK for .NET and AWS Toolkit for Visual Studio first. If the profile is not found then the cmdlet will search in the ini-format credential file at the default location: (user's home directory)\.aws\credentials. Note that the encrypted credential file is not supported on all platforms. It will be skipped when searching for profiles on Windows Nano Server, Mac, and Linux platforms.

If this parameter is specified then this cmdlet will only search the ini-format credential file at the location given.

As the current folder can vary in a shell or during script execution it is advised that you use specify a fully qualified path instead of a relative path.

Required? False
Position? Named
Accept pipeline input? False
-ProfileName <String>
The user-defined name of an AWS credentials or SAML-based role profile containing credential information. The profile is expected to be found in the secure credential file shared with the AWS SDK for .NET and AWS Toolkit for Visual Studio. You can also specify the name of a profile stored in the .ini-format credential file used with the AWS CLI and other AWS SDKs.
Required? False
Position? Named
Accept pipeline input? False
-NetworkCredential <PSCredential>
Used with SAML-based authentication when ProfileName references a SAML role profile. Contains the network credentials to be supplied during authentication with the configured identity provider's endpoint. This parameter is not required if the user's default network identity can or should be used during authentication.
Required? False
Position? Named
Accept pipeline input? False
-SecretKey <String>
The AWS secret key for the user account. This can be a temporary secret key if the corresponding session token is supplied to the -SessionToken parameter.
Required? False
Position? Named
Accept pipeline input? False
-SessionToken <String>
The session token if the access and secret keys are temporary session-based credentials.
Required? False
Position? Named
Accept pipeline input? False
-Region <String>
The system name of the AWS region in which the operation should be invoked. For example, us-east-1, eu-west-1 etc.
Required? False
Position? Named
Accept pipeline input? False
-EndpointUrl <String>

The endpoint to make the call against.

Note: This parameter is primarily for internal AWS use and is not required/should not be specified for normal usage. The cmdlets normally determine which endpoint to call based on the region specified to the -Region parameter or set as default in the shell (via Set-DefaultAWSRegion). Only specify this parameter if you must direct the call to a specific custom endpoint.

Required? False
Position? Named
Accept pipeline input? False

Inputs

You can pipe a String object to this cmdlet for the QueueUrl parameter.

Outputs

This cmdlet returns a collection of Message objects. The service call response (type Amazon.SQS.Model.ReceiveMessageResponse) can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack.

Examples

Example 1

PS C:\> Receive-SQSMessage -AttributeName SenderId, SentTimestamp -MessageAttributeName StudentName, StudentGrade -MessageCount 10 -QueueUrl https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyQueue

Attributes : {[SenderId, AIDAIAZKMSNQ7TEXAMPLE], [SentTimestamp, 1451495923744]}
Body : Information about John Doe's grade.
MD5OfBody : ea572796e3c231f974fe75d89EXAMPLE
MD5OfMessageAttributes : 48c1ee811f0fe7c4e88fbe0f5EXAMPLE
MessageAttributes : {[StudentGrade, Amazon.SQS.Model.MessageAttributeValue], [StudentName, Amazon.SQS.Model.MessageAttributeValue]}
MessageId : 53828c4b-631b-469b-8833-c093cEXAMPLE
ReceiptHandle : AQEBpfGp...20Q5cg==
This example lists information for up to the next 10 messages to be received for the specified queue. The information will contain values for the specified message attributes, if they exist.

Supported Version

AWS Tools for PowerShell: 2.x.y.z