NAME

Paws::SQS::ReceiveMessage - Arguments for method ReceiveMessage on Paws::SQS

DESCRIPTION

This class represents the parameters used for calling the method ReceiveMessage on the Amazon Simple Queue Service service. Use the attributes of this class as arguments to method ReceiveMessage.

You shouldn't make instances of this class. Each attribute should be used as a named argument in the call to ReceiveMessage.

SYNOPSIS

    my $sqs = Paws->service('SQS');
    my $ReceiveMessageResult = $sqs->ReceiveMessage(
      QueueUrl       => 'MyString',
      AttributeNames => [
        'SenderId',
        ... # values: SenderId, SentTimestamp, ApproximateReceiveCount, ApproximateFirstReceiveTimestamp
      ],    # OPTIONAL
      MaxNumberOfMessages     => 1,                                   # OPTIONAL
      MessageAttributeNames   => [ 'MyMessageAttributeName', ... ],   # OPTIONAL
      ReceiveRequestAttemptId => 'MyString',                          # OPTIONAL
      VisibilityTimeout       => 1,                                   # OPTIONAL
      WaitTimeSeconds         => 1,                                   # OPTIONAL
    );
    # Results:
    my $Messages = $ReceiveMessageResult->Messages;
    # Returns a L<Paws::SQS::ReceiveMessageResult> object.

Values for attributes that are native types (Int, String, Float, etc) can passed as-is (scalar values). Values for complex Types (objects) can be passed as a HashRef. The keys and values of the hashref will be used to instance the underlying object. For the AWS API documentation, see <https://docs.aws.amazon.com/goto/WebAPI/sqs/ReceiveMessage>

ATTRIBUTES

AttributeNames => ArrayRef[Str|Undef]

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 (http://en.wikipedia.org/wiki/Unix_time) in milliseconds).
"ApproximateReceiveCount" – Returns the number of times a message has been received across all queues but not deleted.
"AWSTraceHeader" – Returns the X-Ray trace header string.
"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 (http://en.wikipedia.org/wiki/Unix_time) in milliseconds).
"MessageDeduplicationId" – Returns the value provided by the producer that calls the " SendMessage " action.
"MessageGroupId" – Returns the value provided by the producer that calls the " SendMessage " action. Messages with the same "MessageGroupId" are returned in sequence.
"SequenceNumber" – Returns the value provided by Amazon SQS.

MaxNumberOfMessages => Int

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.

MessageAttributeNames => ArrayRef[Str|Undef]

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 QueueUrl => Str

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

Queue URLs and names are case-sensitive.

ReceiveRequestAttemptId => Str

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, it is possible to 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".
It is possible to 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 (https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-visibility-timeout.html) in the Amazon SQS Developer Guide.
If a caller of the "ReceiveMessage" action still processes messages when the visibility timeout expires and messages become visible, another worker consuming from the same queue can receive the same messages and therefore process duplicates. Also, if a consumer 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 maximum 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 (https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/using-receiverequestattemptid-request-parameter.html) in the Amazon SQS Developer Guide.

VisibilityTimeout => Int

The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a "ReceiveMessage" request.

WaitTimeSeconds => Int

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.

To avoid HTTP errors, ensure that the HTTP response timeout for "ReceiveMessage" requests is longer than the "WaitTimeSeconds" parameter. For example, with the Java SDK, you can set HTTP transport settings using the NettyNioAsyncHttpClient (https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/http/nio/netty/NettyNioAsyncHttpClient.html) for asynchronous clients, or the ApacheHttpClient (https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/http/apache/ApacheHttpClient.html) for synchronous clients.

BUGS and CONTRIBUTIONS

The source code is located here: <https://github.com/pplu/aws-sdk-perl>

Please report bugs to: <https://github.com/pplu/aws-sdk-perl/issues>