Here's a detailed guide document on how to create a RAML design in MuleSoft using Design Center and Anypoint Platform.

Here's a detailed guide document on how to create a RAML design in MuleSoft using Design Center and Anypoint Platform.

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📘 Creating a RAML Design in MuleSoft

Table of Contents

1. What is RAML?

2. Prerequisites

3. Steps to Create a RAML Design

   • 3.1 Log in to Anypoint Platform

   • 3.2 Open Design Center

   • 3.3 Create a New API Specification

   • 3.4 Define API Using RAML

   • 3.5 Save and Preview

   • 3.6 Mocking the API

   • 3.7 Publishing to Exchange

4. Best Practices

5. Sample RAML Snippet

6. Conclusion

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1. What is RAML?

RAML (RESTful API Modeling Language) is a YAML-based language used to describe RESTful APIs. It enables you to design an API before any code is written.

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2. Prerequisites

• Anypoint Platform account (https://anypoint.mulesoft.com)

• Basic knowledge of REST APIs

• Familiarity with YAML syntax

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3. Steps to Create a RAML Design

3.1 Log in to Anypoint Platform

• Go to https://anypoint.mulesoft.com

• Enter your credentials to log in.

3.2 Open Design Center

• From the Anypoint Platform dashboard, click on Design Center.

• Choose Create New and select API Specification.

3.3 Create a New API Specification

• Give your project a name.

• Select RAML 1.0 as the specification type.

• Click Create.

3.4 Define API Using RAML

• Use the web-based editor to define your RAML.

• Start with a basic structure:

#%RAML 1.0
title: Example API
version: v1
baseUri: https://api.example.com/v1

/media:
  get:
    description: Get a list of media files
    responses:
      200:
        body:
          application/json:
            example: |
              [
                {
                  "id": "123",
                  "name": "example.jpg"
                }
              ]

3.5 Save and Preview

• Use the Save button frequently.

• Click Try It to view the interactive documentation and test responses.

3.6 Mocking the API

• Click on Mocking Service.

• Enable the mock service to simulate your API’s response before implementing it.

3.7 Publishing to Exchange

• After completion, click Publish to Exchange.

• Add version, description, and tags.

• This will make the API discoverable in Anypoint Exchange.

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4. Best Practices

• Use DataTypes: Separate reusable schemas into a types.raml file.

• Use Traits and ResourceTypes for common behaviors.

• Include examples and descriptions for clarity.

• Follow consistent naming conventions (camelCase, lowercase paths).

• Use versioning in your base URI.

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5. Sample RAML Snippet

#%RAML 1.0
title: Order API
version: v1
baseUri: https://api.orders.com/v1

types:
  Order:
    type: object
    properties:
      id: string
      total: number

/orders:
  get:
    responses:
      200:
        body:
          application/json:
            type: Order[]
  post:
    body:
      application/json:
        type: Order
    responses:
      201:
        body:
          application/json:
            type: Order

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6. Conclusion

Designing APIs with RAML in MuleSoft’s Design Center streamlines the development lifecycle by allowing for early collaboration and validation. Following these steps ensures consistent, reusable, and consumer-friendly APIs.

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Would you like this as a downloadable PDF or want me to generate a full project structure with folders and separate RAML files?