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System Architecture

High-Level Design

ApiLinker follows a modular, plugin-based architecture with clear separation of concerns:

graph TD
    CLI[CLI Layer] --> Orch[Main Orchestrator]
    Orch --> Source[Source Connectors]
    Orch --> Target[Target Connectors]
    Orch --> Mapper[Field Mapper]
    Orch --> Sched[Scheduler]

    Source --> Plugin[Plugin System]
    Target --> Plugin
    Mapper --> Transform[Transform Pipeline]
    Sched --> Error[Error Handling]

Core Design Patterns

Real-time event ingestion is supported via webhooks, message queues, and Server-Sent Events (SSE).

  1. Strategy Pattern: Different connectors, authenticators, and transformers
  2. Factory Pattern: Plugin instantiation and connector creation
  3. Observer Pattern: Event handling and monitoring
  4. Circuit Breaker Pattern: Error handling and recovery
  5. Template Method Pattern: Base classes with customizable steps

Package Structure

apilinker/
├── __init__.py                 # Main exports and version
├── api_linker.py              # Main orchestrator class
├── cli.py                     # Command-line interface
├── core/                      # Core system components
│   ├── __init__.py
│   ├── connector.py           # Base connector classes
│   ├── mapper.py              # Field mapping and transformations
│   ├── scheduler.py           # Scheduling and automation
│   ├── auth.py                # Authentication system
│   ├── error_handling.py      # Error handling and recovery
│   ├── logger.py              # Logging system
│   ├── plugins.py             # Plugin base classes
│   ├── security.py            # Security features
│   └── security_integration.py # Security integration layer
├── connectors/                # Connector implementations
│   ├── scientific/            # Research/scientific APIs
│   └── general/               # General purpose APIs
├── plugins/                   # Built-in plugins
└── examples/                  # Usage examples