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you would a local layout Finally, we wanted to share models and libraries throughout all these applications without having to worry about packaging them and redeploying all these applications each time we made a bug fix to a model With these goals in mind, I set out to find a Ruby web framework that would help us achieve these goals After downloading and testing nearly 20 frameworks, I was at a loss for the solution we needed Then I found Rack1 Rack bills itself as a framework for frameworks It is a middleware abstraction layer that lets framework developers get on with developing their framework without worrying about things like parsing requests and talking with application servers Within a few hours I had a simple MVC-based framework up and running, and the Mack Framework was born I then spent the next year building and developing a large feature set for Mack, including all the libraries to handle distributed routes, views, and models During that time I was asked time and again to make these components available outside the Mack framework for others to use In April 2009, I announced an early version of a library I dubbed Distribunaut Distribunaut2 is a port of one-third of the distributed features that are found in Mack In particular, it focuses on making it incredibly easy to distribute models and other Ruby classes You will not find distributed views/layouts and routes in Distribunaut The reason is that they are too specific to each of the web frameworks out there, and coding for each one would be a lot of work So with that brief history of Distribunaut, let s look at what it can do for us
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Installation
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Installing the Distribunaut library is simple It can be installed using RubyGems:
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$ gem install markbates-distribunaut -s http://gemsgithubcom
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You should then see something similar to the following, telling you that you have successfully installed the gem:
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Successfully installed markbates-distribunaut-021
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Blastoff: Hello, World!
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Blastoff: Hello, World!
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Distribunaut uses DRb and Rinda to do most of its heavy lifting The good news is that because you have already learned all about DRb and Rinda, you can easily jump into experimenting with Distribunaut As you ll remember from our look at Rinda, we need to start a RingServer before we can run any code Distribunaut ships with a convenient binary to help make starting, stopping, and restarting a RingServer easy:
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$ distribunaut_ring_server start
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If you wanted to stop the RingServer, you would do so with the following command:
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$ distribunaut_ring_server stop
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You can probably guess how to restart the server You should restart the
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RingServer between all these examples, just so things don t go a bit funny on you:
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$ distribunaut_ring_server restart
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So, with a RingServer running nicely as a daemon in the background, let s kick off things with a simple Hello World application Let s start with a server Keep in mind that, as we talked about earlier in the book, when we are using DRb and Rinda, applications can act as both a server and a client So when we use the term server here, we are merely using it to describe a bit of code that serves up some content So what does our HelloWorld class look like with Distribunaut Let s see:
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require 'rubygems' require 'distribunaut' configatrondistribunautapp_name = :hello_world_app class HelloWorld include Distribunaut::Distributable
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def say_hi "Hello, World!" end end DRbthreadjoin
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First we require rubygems and then the Distribunaut library itself After that we hit the first of two lines that make Distribunaut special Each Distribunaut application needs a unique name When we talk about applications within Distribunaut, we are actually talking about a Ruby VM/process that contains one or more Distribunaut classes The name of that application should be unique to avoid confusion We will look at what can happen with redundant application, and class, names a bit later in this chapter To manage its configurations, Distribunaut uses the Configatron3 library We set the application as follows: