[ADP-50] API Landscapes

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Overview

The API Landscape is the collection of all APIs within an organization that collectively support its business objectives.

Overall Architecture

1. Categorization and Layering: Classify APIs based on functionality and use, such as core business APIs, data APIs, and third-party integration APIs. Utilize a layered architecture, such as presentation layer, business logic layer, and data access layer.
2. Dependency Management: Ensure clear and minimized dependencies between APIs. Use API gateways or service meshes to manage dependencies.
3. API Gateway: Utilize an API gateway for unified traffic management, handling authentication, authorization, rate limiting, and logging.

Version Management

1. Versioning Strategy: Establish a clear versioning strategy, including major, minor, and patch versions. Use URL paths or request headers to identify versions.
2. Deprecation Plan: Define the deprecation process and timeline for APIs, and communicate this to users for migration purposes.

Consistency

1. Naming Conventions: Ensure consistent naming across all APIs, including resource names, actions, and parameters.
2. Error Handling: Use a unified error format and error codes. Refer to RFC 7807 for problem detail definitions.
3. Data Formats: Standardize on JSON as the primary data format unless there are specific needs for alternative formats.

Authentication and Authorization

1. Unified Authentication: Use a consistent authentication mechanism, such as OAuth 2.0 or JWT, for all APIs.
2. Fine-Grained Authorization: Implement fine-grained authorization policies, based on roles or attributes, to control access.

Documentation and Discovery

1. Automated Documentation Generation: Use tools like OpenAPI or GraphQL Schema to automatically generate API documentation.
2. API Catalog: Maintain a unified API catalog to facilitate discovery and access for developers.

Performance and Monitoring

1. Performance Testing: Conduct regular performance testing to ensure API response times and throughput meet standards.
2. Monitoring and Alerting: Implement monitoring and alerting systems to track API performance and operational metrics.

Security

1. Data Protection: Ensure data encryption during transmission using HTTPS.
2. Rate Limiting: Implement rate limiting to prevent abuse and DDoS attacks.
3. Security Audits: Conduct regular security audits to identify and remediate vulnerabilities.

Testing and Deployment

1. Automated Testing: Utilize CI/CD pipelines for automated testing, including unit tests, integration tests, and end-to-end tests.
2. Blue-Green Deployment: Adopt blue-green deployment strategies to ensure smooth transitions and rollback capabilities for new API versions.

Collaboration and Governance

1. Development Process: Establish a development process that includes design reviews, code reviews, and testing acceptance.
2. Governance Committee: Set up an API governance committee responsible for creating standards and ensuring compliance.

API Openness and Integration

1. Open APIs: Promote API openness to support third-party developers in integration and innovation.
2. Integration Strategy: Develop a clear integration strategy, covering the use of third-party APIs and internal API interoperability.