Custom Apis | Api | Oracle Tutorial

Introduction to Custom APIs

Custom APIs allow you to expose specific functionalities or data from your Oracle database through a web API interface. This tutorial covers creating and implementing custom APIs with Oracle.

Prerequisites

Before starting, ensure you have an Oracle database instance set up and basic knowledge of API concepts and Oracle PL/SQL.

Creating Custom APIs

Use Oracle's PL/SQL to define procedures or functions that encapsulate the desired logic or data retrieval operations.

Example PL/SQL procedure:

CREATE OR REPLACE PROCEDURE getEmployee (
    emp_id IN NUMBER,
    emp_details OUT SYS_REFCURSOR
) AS
BEGIN
    OPEN emp_details FOR
    SELECT * FROM employees WHERE employee_id = emp_id;
END;

Implementing RESTful Endpoints

Use Oracle REST Data Services (ORDS) or other frameworks to expose PL/SQL procedures/functions as RESTful APIs endpoints.

Example ORDS endpoint configuration:

BEGIN
    ORDS.ENABLE_SCHEMA(
        p_enabled => TRUE,
        p_schema => 'HR',
        p_url_mapping_type => 'BASE_PATH',
        p_url_mapping_pattern => 'hrapi',
        p_auto_rest_auth => TRUE
    );
    COMMIT;
END;

Testing Custom APIs

Use tools like Postman or cURL to test your custom APIs by sending requests and verifying responses.

Example cURL request:

curl -X GET http://localhost:8080/ords/hr/hrapi/employees/100

Security Considerations

Implement authentication and authorization mechanisms to secure your custom APIs, ensuring access control and data protection.

Conclusion

Creating custom APIs with Oracle enables efficient data access and integration with external applications, enhancing your organization's capabilities.

Creating Custom APIs with Oracle