Microservice Header Trail

The objective is pass through all microservices the information captured into first interface and sending them when it is necessary.

This gem operates including the captured information and passing through the HTTP header. It contains an interface for defining the attributes, a rack middleware to retrieve from header, a faraday middleware to include the information for next microservice and a interface to retrieve the information.

Install the gem and add to the application's Gemfile by executing:

$ bundle add ms_header_trail

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install ms_header_trail

Setup the project with rack middleware and includes the middleware into the microsservices

config.middleware.use Rack::MsHeaderTrail

When calling the the service, use the faraday middleware to call the microservice

Faraday.new(configuration.host) do |builder|
    builder.request :json
    builder.response :json, content_type: /\bjson$/
    builder.use Faraday::MsHeaderTrail
    builder.adapter Faraday.default_adapter
end

When start collect information, initiate the process using the code

MsHeaderTrail.collect(
  user_id: '123',
  user_type: 'employee'
  interface: 'portal'
)

To retrieve the information on any microservice, just use:

data = MsHeaderTrail.retrieve
=>
{
  user_id: '123',
  user_type: 'employee'
  interface: 'portal'
}

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.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/ms_header_trail.

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