README.md
# ServiceContract [![Build Status](https://travis-ci.org/chingor13/service_contract.png)](https://travis-ci.org/chingor13/service_contract) [![Code Climate](https://codeclimate.com/github/chingor13/service_contract.png)](https://codeclimate.com/github/chingor13/service_contract) [![Code Coverage](https://codeclimate.com/github/chingor13/service_contract/coverage.png)](https://codeclimate.com/github/chingor13/service_contract)
The gem tries to abstract the definition of a service's interface contract
## Installation
Add this line to your application's Gemfile:
```
gem 'service_contract'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install service_contract
## Providers
### Avro
We can read an Avro protocol file to determine a set of service definitions.
Example:
```
class Gnomon::Contract::Service < ServiceContract::Avro::Service
def self.data_dir
return "/path/to/avro_files"
end
end
```
## Usage
We define a service as having many versions with each version having several `Protocol`s. A `Protocol` has many `Endpoint`s.
Example:
```
# a Gnomon::Contract::Service instance (subclass of ServiceContract::AbstractService)
version = Gnomon::Contract::Service.find(1)
=> <#Gnomon::Contract::Service>
protocol = version.protocol("location")
=> <#ServiceContract::Avro::Protocol>
protocol.endpoints
=> [<#ServiceContract::Avro::Endpoint>,...]
```
## Documentation
`service_contract` also provides a nice documentation layer packaged in the form of a [sinatra](http://www.sinatrarb.com/) rack application.
```
module Gnomon
module Contract
class Documentation < ServiceContract::Avro::Documentation
helpers do
def service
Gnomon::Contract::Service
end
end
end
end
end
# in your rackup config
run Gnomon::Contract::Documentation
# or mount in rails routes
MyApplication.routes.draw do
mount Gnomon::Contract::Documentation, at: "docs/"
end
```
**Note**: You will have to add `sinatra` and `slim` (templating engine) to your gem dependencies yourself because it's not a core dependency.