RightScale Amazon Web Services Ruby Gems
= RightScale Amazon Web Services Ruby Gems
Published by RightScale, Inc. under the MIT License. For information about RightScale, see http://www.rightscale.com
== THE GEM IS NO LONGER MAINTAINED
We recommend you use https://github.com/rightscale/rightawsapi instead.
The RightScale AWS gems have been designed to provide a robust, fast, and secure interface to Amazon EC2, EBS, S3, SQS, SDB, and CloudFront. These gems have been used in production by RightScale since late 2006 and are being maintained to track enhancements made by Amazon. The RightScale AWS gems comprise:
All RightScale AWS interfaces offer two threading options: 1. Use a single persistent HTTP connection per process. 2. Use a persistent HTTP connection per Ruby thread.
Either way, it doesn't matter how many (for example) RightAws::S3 objects you create, they all use the same per-program or per-thread connection. The purpose of sharing the connection is to keep a single persistent HTTP connection open to avoid paying connection overhead on every request. However, if you have multiple concurrent threads, you may want or need an HTTP connection per thread to enable concurrent requests to AWS. The way this plays out in practice is: 1. If you have a non-multithreaded Ruby program, use the non-multithreaded setting. 2. If you have a multi-threaded Ruby program, use the multithreaded setting to enable concurrent requests to S3 (or SQS, or SDB, or EC2). 3. For running under Mongrel/Rails, use the non-multithreaded setting even though mongrel is multithreaded. This is because only one Rails handler is invoked at time (i.e. it acts like a single-threaded program)
Note that due to limitations in the I/O of the Ruby interpreter you may not get the degree of parallelism you may expect with the multi-threaded setting.
== GETTING STARTED:
Amazon's Migration Guide for moving from first to second generation SQS is avalable at: http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1148 * For SDB read RightAws::SdbInterface, RightAws::ActiveSdb, and consult the Amazon SDB API documentation at http://developer.amazonwebservices.com/connect/kbcategory.jspa?categoryID=141 * For CloudFront (ACF) read RightAws::AcfInterface and consult the Amazon CloudFront API documentation at http://developer.amazonwebservices.com/connect/kbcategory.jspa?categoryID=213
== KNOWN ISSUES:
7/08: A user has reported that uploads of large files on Windows may be broken on some Win platforms due to a buggy File.lstat.size. Use the following monkey-patch at your own risk, as it has been proven to break Rails 2.0 on Windows:
require 'win32/file' class File def lstat self.stat end end
Attempting to use the Gibberish plugin (used by the Beast forum app) will break right_aws as well as lots of other code. Gibberish changes the semantics of core Ruby (specifically, the String class) and thus presents a reliability problem for most Ruby programs.
2/11/08: If you use RightAws in conjunction with attachmentfu, the rightaws gem must be included (using the require statement) AFTER attachmentfu. If rightaws is loaded before attachment_fu, you'll encounter errors similar to:
s3.amazonaws.com temporarily unavailable: (wrong number of arguments (5 for 4))
'incompatible Net::HTTP monkey-patch'
This is due to a conflict between the righthttpconnection gem and another gem required by attachment_fu.
RightAws requires REXML and the righthttpconnection gem. If libxml and its Ruby bindings (distributed in the libxml-ruby gem) are present, RightAws can be configured to use them: RightAws::RightAWSParser.xml_lib = 'libxml' Any error with the libxml installation will result in RightAws failing-safe to REXML parsing.
sudo gem install right_aws
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