Hanami::Lambda

Hanami Lambda is a gem that provides a way to run hanami application on AWS Lambda.

Status

Rubies

Hanami::Lambda supports Ruby (MRI) 3.0+

Installation

Add this line to your application's Gemfile:

gem "hanami-lambda"

And then execute:

$ bundle install

Update config/app.rb with below content

require 'hanami'
require 'hanami/lambda'

module MyApp # Rename to your app name
  class Lambda < Hanami::App
    extend Hanami::Lambda::Application
  end
end

Create app/function.rb as handler base class

module MyApp
  class Function < Hanami::Lambda::Function
  end
end

Generator is comming soon.

Usage

Use config/app.Hanami::Lambda.call as the function handler

# AWS SAM
Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: .
      Handler: config/app.Hanami::Lambda.call
      Runtime: ruby3.2

Delegate

If the lambda function isn't trigger by APIGateway, we can use delegate method to define the handler function.

Create config/lambda.rb with below content

module MyApp
  class Lambda < Hanami::Lambda::Dispatcher
    delegate "MyFunction", to: "daily_task"
  end
end

The IaC generated function will be my-app-MyFunction-r8faNAo3iUqx therefore the dispatcher will use include MyFunction to find targeted function

Add app/functions/daily_task.rb to define the handle action

module MyApp
  module Functions
    class DailyTask < MyApp::Function
      def handle(event, context)
        # ...
      end
    end
  end
end

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 the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/elct9620/hanami-lambda.

License

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