Message parser

Message parsers it is microservice for parse messages and calculated result date based on predefined rules.

Usage

Send POST request with message and issueDateTime to calculate result date.

Example

Post http://{url}/calculation
{
    "message":"Order was made. Your package will be deliver within 48 hours",
    "issueDateTime":"2016-03-10T07:00:00.000Z"
}

Result

{
    "date": "2016-03-12T07:00:00.000Z"
}

Configuration

Actions to take are defined in seeds.rb. To define your own actions you should use delivered DSL.

Action rules:

• message are striped (multi white spaces are count as one).
• all numeric values in message are parsed and can be send to operation by defining params.
• prams ordinal start from 0.
• you can define many params.

Action template

Actions.define do
  message '
    <your_message>
    '

  operation <operation_class>
  params do
    ordinal <parameter_ordinal>, <parameter_name>
  end
end

Operation template

class OperationName
  def calculate(issue_date_time, params)
    issue_date_time + params.fetch(:parameter_name).hours
  end
end

Predefined action for previous example

Actions.define do
  message '
    Order was made. Your package will be deliver within 48 hours
    '

  operation AddHoursToIssueDateTime
  params do
    ordinal 0, :hours
  end

Installation

You need to have installed bundler.

Install gems.

bundle install

Run database migration.

rake db:migrate

Fill database with predefined rules.

rake db:seed    

Run thin server.

bundle exec thin start

Tech

Message parser it is written in Ruby with sinatra help.