API Live Sync Part 3: Live Sync Service

API Live Sync Part 3: Live Sync Service

In this third installment, I explore the service layer implementation that orchestrates the entire API Live Sync system.

Service Architecture

The Live Sync Service acts as the central coordinator, managing multiple live sources and ensuring they stay synchronized with the main application state.

Core Service Interface

interface LiveSyncService {
  // Source management
  addSource(config: LiveSourceConfig): Promise<void>;
  removeSource(sourceId: string): Promise<void>;
  updateSource(config: LiveSourceConfig): Promise<void>;

  // Synchronization
  syncSource(sourceId: string): Promise<SyncResult>;
  syncAllSources(): Promise<SyncResult[]>;

  // Status and monitoring
  getSourceStatus(sourceId: string): SyncStatus;
  getAllSourceStatuses(): SyncStatus[];
}

Service Implementation

The service layer handles several critical responsibilities:

1. Source Management: Adding, removing, and updating live source configurations
2. Synchronization Logic: Coordinating the sync process across multiple sources
3. Error Handling: Managing failures and retry mechanisms
4. State Management: Maintaining consistent state across the application
5. Event Broadcasting: Notifying other parts of the system about sync events

Event-Driven Architecture

The service uses an event-driven approach to communicate with other parts of the system:

enum SyncEvents {
  SOURCE_ADDED = "source:added",
  SOURCE_REMOVED = "source:removed",
  SYNC_STARTED = "sync:started",
  SYNC_COMPLETED = "sync:completed",
  SYNC_FAILED = "sync:failed",
}

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