Prompt

I need a help to create an integration, using Oracle Integration Cloud, consuming data from Oracle Database, throught JDBC and exporting as API RESTful. Can you help me to define steps and examples

Copilot

Perfect — let’s elevate your documentation so it’s not just a “how-to” but a production-ready integration guide. I’ll expand your steps to include OAuth security, pagination for large datasets, and OpenAPI/Swagger documentation so consumers can easily adopt your RESTful API.

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🚀 Enhanced Documentation: Oracle Integration Cloud (OIC) → JDBC → REST API

1. Configure Secure Database Connection

• Create a Database Adapter connection in OIC using JDBC.
• Use Wallet/SSL if connecting to Autonomous Database.
• Store credentials securely in OIC’s credential store.

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2. Secure REST Trigger with OAuth

• When creating the REST Adapter trigger, configure OAuth 2.0 authentication:
  • Authorization Server: Define in OIC or integrate with Oracle Identity Cloud Service (IDCS).
  • Grant Types: Typically Client Credentials for system-to-system APIs, or Authorization Code for user-facing APIs.
  • Token Validation: OIC automatically validates incoming tokens before invoking the integration.
• Example header in request:

GET /employees/101
Authorization: Bearer <access_token>

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3. Database Adapter Invocation

• Use SELECT for queries, INSERT/UPDATE/DELETE for mutations.
• Parameterize queries to avoid SQL injection.
• Example query:

SELECT employee_id, name, department, salary
FROM employees
WHERE employee_id = :employeeId

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4. Implement Pagination

Large datasets should not be returned in one response. Add pagination support:

• REST Request Parameters:
  • page (default = 1)
  • pageSize (default = 50)
• SQL with OFFSET/FETCH:

SELECT employee_id, name, department, salary
FROM employees
ORDER BY employee_id
OFFSET :offset ROWS FETCH NEXT :pageSize ROWS ONLY

• Response Example:

{
  "page": 2,
  "pageSize": 50,
  "totalRecords": 500,
  "data": [
    { "employeeId": 151, "name": "Jane Doe", "department": "Finance" }
  ]
}

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5. Error Handling

• Map database errors to HTTP codes:
  • 404 Not Found → No record found
  • 400 Bad Request → Invalid parameters
  • 500 Internal Server Error → DB connection issues

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6. Document with OpenAPI/Swagger

• Generate an OpenAPI specification for your REST API.
• Example snippet:

openapi: 3.0.0
info:
  title: Employee API
  version: 1.0.0
servers:
  - url: https://<OIC-instance>/ic/api/integration/v1/flows/rest/EMPLOYEES/1.0
paths:
  /employees/{id}:
    get:
      summary: Get employee by ID
      security:
        - oauth2: [read]
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Employee found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Employee'
components:
  schemas:
    Employee:
      type: object
      properties:
        employeeId:
          type: integer
        name:
          type: string
        department:
          type: string
        salary:
          type: number
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://idcs.example.com/oauth2/v1/token
          scopes:
            read: Read employee data
            write: Modify employee data

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✅ Best Practices Recap

• 🔒 OAuth 2.0 for secure access
• 📄 Pagination to handle large datasets
• 📘 OpenAPI/Swagger for developer adoption
• 🛡️ Error mapping for predictable responses
• ⚡ Parameterization to prevent SQL injection

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👉 Would you like me to draft a full OpenAPI spec file for your Employee API (with GET, POST, PUT, DELETE endpoints), so you can import it directly into Swagger UI or API Gateway?