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Amazon Simple Queue Service Developer Guide<br />

AWS Identity and Access Management<br />

Message Lifecycle<br />

Component 1 sends Message A to a queue and the message is redundantly distributed<br />

across the SQS servers.<br />

When Component 2 is ready to process a message, it retrieves messages from the queue,<br />

and Message A is returned. While Message A is being processed, it remains in the queue<br />

and is not returned to subsequent receive requests for the duration of the visibility timeout.<br />

Component 2 deletes Message A from the queue to avoid the message being received and<br />

processed again once the visibility timeout expires.<br />

Note<br />

SQS automatically deletes messages that have been in a queue for more than 4 days.<br />

AWS Identity and Access Management<br />

Amazon SQS integrates with AWS Identity and Access Management (IAM), a service that lets your<br />

organization do the following:<br />

API Version 2009-02-01<br />

10

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