About Niraj Singh
Amazon Simple Queue Service or SQS is a highly scalable hosted messaging queue provided by Amazon Webservice stack. Amazon SQS can be used to completely decouple operations of different components within the system which otherwise exchange data to perform independent tasks. Amazon SQS also helps us in saving the data which would be lost in case the application is down or if one of the component becomes unavailable.
Amazon SQS Features (Copied directly from amazon website)
- Redundant infrastructure—Guarantees delivery of your messages at least once, highly concurrent access to messages, and high availability for sending and retrieving messages
- Multiple writers and readers—Multiple parts of your system can send or receive messages at the same time. SQS locks the message during processing, keeping other parts of your system from processing the message simultaneously.
- Configurable settings per queue—All of your queues don’t have to be exactly alike. For example, one queue can be optimized for messages that require a longer processing time than others.
- Variable message size—Your messages can be up to 65536 bytes (64 KiB) in size. For even larger messages, you can store the contents of the message using the Amazon Simple Storage Service (Amazon S3) or Amazon SimpleDB and use Amazon SQS to hold a pointer to the Amazon S3 or Amazon SDB object. Alternately, you can split the larger message into smaller ones.
Source : http://www.javacodegeeks.com/2013/06/working-with-amazon-simple-queue-service-using-java.html
