Logtastic

This is a gem to allow you to more easily read from your Elasticsearch index of Logstash messages, using their default schema.

Installation

Add this line to your application's Gemfile:

gem 'logtastic', git: "git@github.com:berfarah/logtastic.git"

And then execute:

$ bundle

Usage

You can use the client to #search pretty much in the same way you would use Elasticsearch::Client

client = Logtastic.client.new(host: ENV.fetch('ELASTICSEARCH_HOST'))
client.search(index: :my_index, q: "term:foo")

The function of this gem, however, is how you handle the response. The default model for responses exposes id, timestamp and message to #as_json. It grabs timestamp and message from the "_source" attribute in the Elasticsearch response.

You can delegate, expose and hide methods in a Logtastic::Model:

class Car < Logtastic::Model
  # fetches from "_source": { "passengers" => 5 }
  # creates the #passengers method
  # exposes :passengers in #as_json
  delegate :passengers

  # It will not expose attributes to #as_json if you ask it not to
  delegate :employee_pricing, expose: false

  # fetches from a local method
  # exposes :my_method in #as_json
  expose :cost_per_passenger

  def cost_per_passenger
    price / passengers
  end
end

# You need to register your model for it to automatically be handled
Logtastic::Registry.add(Car, :car)

# Now any time you search the index `car`, it will be handled by the Car model.
client.search(index: :cars, q: "passengers:4")  # => Response[Car]
client.get(index: :cars, type: :car, id: 2)     # => Response[Car]

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/berfarah/logtastic. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.