Penfold > Amazon-SQS-Simple-2.02 > Amazon::SQS::Simple::Queue

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Source   Latest Release: Amazon-SQS-Simple-2.03

NAME ^

Amazon::SQS::Simple::Queue - OO API for representing queues from the Amazon Simple Queue Service.

SYNOPSIS ^

    use Amazon::SQS::Simple;

    my $access_key = 'foo'; # Your AWS Access Key ID
    my $secret_key = 'bar'; # Your AWS Secret Key

    my $sqs = new Amazon::SQS::Simple($access_key, $secret_key);

    my $q = $sqs->CreateQueue('queue_name');

    # Single messages
    
    my $response = $q->SendMessage('Hello world!');
    my $msg = $q->ReceiveMessage;
    print $msg->MessageBody; # Hello world!    
    $q->DeleteMessage($msg);
    # or, for backward compatibility
    $q->DeleteMessage($msg->ReceiptHandle);
    
    # Batch messaging of up to 10 messages per operation
    
    my @responses = $q->SendMessageBatch( [ 'Hello world!', 'Hello again!' ] );    
    # or with defined message IDs
    $q->SendMessageBatch( { msg1 => 'Hello world!', msg2 => 'Hello again!' } );
    my @messages = $q->ReceiveMessageBatch; 
    $q->DeleteMessageBatch( \@messages );

INTRODUCTION ^

Don't instantiate this class directly. Objects of this class are returned by various methods in Amazon::SQS::Simple. See Amazon::SQS::Simple for more details.

METHODS ^

Endpoint()

Get the endpoint for the queue.

Delete([%opts])

Deletes the queue. Any messages contained in the queue will be lost.

SendMessage($message, [%opts])

Sends the message. The message can be up to 8KB in size and should be plain text.

SendMessageBatch($messages, [%opts])

Sends a batch of up to 10 messages, passed as an array-ref. Message IDs (of the style 'msg_1', 'msg_2', etc) are auto-generated for each message. Alternatively, if you need to specify the format of the message ID then you can pass a hash-ref {$id1 => $message1, etc}

ReceiveMessage([%opts])

Get the next message from the queue.

Returns one or more Amazon::SQS::Simple::Message objects (depending on whether called in list or scalar context), or undef if no messages are retrieved.

NOTE: This behaviour has changed slightly since v1.06. It now always returns the first message in scalar context, irrespective of how many there are.

See Amazon::SQS::Simple::Message for more details.

Options for ReceiveMessage:

  • MaxNumberOfMessages => INTEGER

    Maximum number of messages to return (integer from 1 to 20). SQS never returns more messages than this value but might return fewer. Not necessarily all the messages in the queue are returned. Defaults to 1.

  • WaitTimeSeconds => INTEGER

    Long poll support (integer from 0 to 20). The duration (in seconds) that the ReceiveMessage action call will wait until a message is in the queue to include in the response, as opposed to returning an empty response if a message is not yet available.

    If you do not specify WaitTimeSeconds in the request, the queue attribute ReceiveMessageWaitTimeSeconds is used to determine how long to wait.

  • VisibilityTimeout => INTEGER

    The duration in seconds (integer from 0 to 43200) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request.

    If you do not specify VisibilityTimeout in the request, the queue attribute VisibilityTimeout is used to determine how long to wait.

ReceiveMessageBatch([%opts])

As ReceiveMessage(MaxNumberOfMessages => 10)

DeleteMessage($message, [%opts])

Pass this method either a message object or receipt handle to delete that message from the queue. For backward compatibility, can pass the message ReceiptHandle rather than the message.

DeleteMessageBatch($messages, [%opts])

Pass this method an array-ref containing up to 10 message objects to delete all of those messages from the queue

ChangeMessageVisibility($receipt_handle, $timeout, [%opts])

NOT SUPPORTED IN APIs EARLIER THAN 2009-01-01

Changes the visibility of the message with the specified receipt handle to $timeout seconds. $timeout must be in the range 0..43200.

AddPermission($label, $account_actions, [%opts])

NOT SUPPORTED IN APIs EARLIER THAN 2009-01-01

Sets a permissions policy with the specified label. $account_actions is a reference to a hash mapping 12-digit AWS account numbers to the action(s) you want to permit for those account IDs. The hash value for each key can be a string (e.g. "ReceiveMessage") or a reference to an array of strings (e.g. ["ReceiveMessage", "DeleteMessage"])

RemovePermission($label, [%opts])

NOT SUPPORTED IN APIs EARLIER THAN 2009-01-01

Removes the permissions policy with the specified label.

GetAttributes([%opts])

Get the attributes for the queue. Returns a reference to a hash mapping attribute names to their values. Currently the following attribute names are returned:

  • VisibilityTimeout
  • ApproximateNumberOfMessages
SetAttribute($attribute_name, $attribute_value, [%opts])

Sets the value for a queue attribute. Currently the only valid attribute name is VisibilityTimeout.

ACKNOWLEDGEMENTS ^

Chris Jones provied the batch message code in release 2.0

AUTHOR ^

Copyright 2007-2008 Simon Whitaker <swhitaker@cpan.org> Copyright 2013 Mike (no relation) Whitaker <penfold@cpan.org>

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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