You are previewing Programming Amazon Web Services.

Programming Amazon Web Services

Cover of Programming Amazon Web Services by James Murty Published by O'Reilly Media, Inc.
  1. Programming Amazon Web Services
    1. SPECIAL OFFER: Upgrade this ebook with O’Reilly
    2. A Note Regarding Supplemental Files
    3. Preface
      1. What’s in This Book?
      2. Ruby and Interactive Examples
      3. Conventions Used in This Book
      4. Using Code Examples
      5. Safari® Enabled
      6. How to Contact Us
      7. Acknowledgments
    4. 1. Infrastructure in the Cloud
      1. Amazon Web Services for Infrastructure
      2. Thinking Like Amazon
      3. Reality Check
      4. Interfaces: REST and Query Versus SOAP
    5. 2. Interacting with Amazon Web Services
      1. REST-Based APIs
      2. User Authentication
      3. Performing AWS Requests
    6. 3. S3: Simple Storage Service
      1. S3 Overview
      2. Interacting with S3
      3. Buckets
      4. Objects
      5. Alternative Hostnames
      6. Access Control Lists
      7. Server Access Logging (Beta)
      8. Signed URIs
      9. Distributing Objects with BitTorrent
    7. 4. S3 Applications
      1. Share Large Files
      2. Online Backup with AWS::S3
      3. S3 Filesystem with ElasticDrive
      4. Mediated Access to S3 with JetS3t
    8. 5. EC2: Elastic Compute Cloud (Beta)
      1. EC2 Overview
      2. Interacting with EC2
      3. Keypairs
      4. Network Security by IP
      5. Finding Amazon Machine Images
      6. Controlling Instances
      7. Log In to an Instance
      8. Security Groups
      9. Managing and Sharing AMIs
      10. Console Output and Instance Reboot
    9. 6. Using EC2 Instances and Images
      1. EC2 Instances in Detail
      2. Data Management in EC2
      3. Modifying an AMI
      4. Registering an AMI
      5. Create an AMI from Scratch
    10. 7. EC2 Applications
      1. Dynamic DNS
      2. On-Demand VPN Server with OpenVPN
      3. Web Photo Album with Gallery 2
    11. 8. SQS: Simple Queue Service
      1. SQS Overview
      2. Interacting with SQS
      3. Queues
      4. Messages
      5. Queue Attributes
      6. Queue Access Control
    12. 9. SQS Applications
      1. Messaging Simulator
      2. Distributed Application Services with BOTO
      3. Automated Management of EC2 Instance Pools with Lifeguard
    13. 10. FPS: Flexible Payments Service (Beta)
      1. FPS Overview
      2. Interacting with FPS
      3. Managing Your Tokens
      4. Acquiring Third-Party Tokens
      5. Pay Now Widgets
    14. 11. FPS Transactions and Accounts
      1. Performing FPS Transactions
      2. Account Management and Information
    15. 12. FPS Advanced Topics
      1. Gatekeeper Language Guide
      2. Micropayments with FPS
      3. Building a Marketplace Application
      4. Subscribing to FPS Event Notifications
    16. 13. SimpleDB (Beta)
      1. SimpleDB Overview
      2. Interacting with SimpleDB
      3. Domains
      4. Items and Attributes
      5. Representing Data in SimpleDB
      6. Performing Queries
      7. Stock Price Database: A Mini SimpleDB Application
    17. A. AWS Resources
      1. AWS Online Resources
      2. Client Tools
      3. API Libraries
      4. Third-Party AWS Solutions
    18. B. AWS API Error Codes
      1. S3: Simple Storage Service
      2. EC2: Elastic Compute Cloud
      3. SQS: Simple Queue Service
      4. FPS: Flexible Payments Service
      5. SimpleDB
    19. Index
    20. About the Author
    21. Colophon
    22. SPECIAL OFFER: Upgrade this ebook with O’Reilly

Chapter 8. SQS: Simple Queue Service

Amazon’s Simple Queue Service (SQS) provides reliable storage and delivery of messages between any clients or computers with access to the Internet. It allows message senders and recipients to interact without having to communicate directly with each other and without requiring that either side be always available or connected to the network.

SQS combines the key advantages of a conventional messaging architecture—loosely-coupled and fault-tolerant communication—with a reliable and flexible distributed infrastructure that stores messages redundantly over multiple data centers. Because SQS is accessible to clients on any platform that can send and receive HTTP requests, the service makes it possible to build distributed applications with truly heterogeneous components using a range of platforms and development languages.


As this book went to press, Amazon Web Services released a new version of the SQS service API: 2008-01-01. This new API includes an updated pricing model that is intended to make the service cheaper for most users, however it also includes significant changes that are not compatible with previous API versions or the third-party libraries and tools we use in this book.

The previous APIs will remain available until May 6, 2009, after when all SQS users must migrate to the 2008-01-01 version. In this book we describe the older 2007-05-01 API and we will not discuss the new API in depth. For more information about the benefits of ...

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