Ruby’s ecosystem is rich with microservices frameworks, each offering unique advantages for web application development. While Sinatra is widely celebrated for its simplicity and lightweight nature, several other frameworks provide powerful alternatives. 

Ruby Microservices Frameworks
Here’s a look at some popular Ruby microservices frameworks beyond Sinatra:
    1. Grape​
        i) A REST-like API micro-framework designed for building APIs.
       ii) Offers built-in features such as parameter validation, versioning, and error handling.
       iii) Can be seamlessly integrated with existing Rack-based applications or function as a standalone API service.

    2. Roda

        i) A fast and lightweight web framework built on Rack.
        ii) Emphasizes simplicity and performance, utilizing a routing tree for efficient route management.
        iii) Ideal for developers seeking clean and maintainable code structures.

    3. Cuba

      i)A minimalist microframework inspired by Sinatra.
      ii) Focuses on speed and simplicity, offering only essential tools for web development.
      iii) Employs a middleware approach, making it suitable for small, fast applications.

    4. Padrino

       i) A full-featured framework that extends Sinatra.
       ii) Adds additional functionality such as admin dashboards, generators, and more.
    iii) Perfect for developers who appreciate Sinatra's simplicity but need extra features for more complex applications.

     5. Camping

       i) An extremely lightweight web framework, with a codebase under 4KB.
       ii) Designed for building tiny web applications with minimal overhead.
       iii) Adopts a Rails-like approach to structure but on a much smaller scale.

      6. Scorched

       i) A microframework focused on flexible and powerful routing.
       ii) Provides advanced parameter handling and nested routes.
       iii) Suitable for projects where routing is a primary concern and performance is critical.

Example: Integrating Grape with a Rails Application
  Step 1: Add Grape to the Gemfile
    To get started, add Grape to your Gemfile: 

 gem 'grape'

 class Base < Grape::API
  format :json
  get :hello do
    { message: "Hello, World!" }
  end
 end
end

This code snippet sets up a basic API with a single GET endpoint that returns a JSON response.

Step 3: Mount the Grape API in Rails

Next, you’ll need to mount the Grape API in your Rails application's routing file:

Rails.application.routes.draw do
   mount API::Base => '/api'
 end

This setup makes the API available under the /api path in your Rails application.

Step 4: Testing the API

With everything set up, start your Rails server and navigate to http://localhost:3000/api/hello. You should see a JSON response like this:

{
 "message": "Hello, World!"
}

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