Integration checkpoint for epic-contact-search-service-infrastructure
epic-contact-search-service-infrastructure-integration-task — Integration Task
Integration Purpose
Verify integration with dependent epics: epic-contact-search-data-layer
This integration checkpoint ensures proper coordination and compatibility between different epics. It verifies that all interfaces, data flows, and dependencies are correctly implemented before proceeding.
Integrates With Epics
Execution Context
Tier 7 - 84 tasks
Can start after Tier 6 completes
Handles integration between different epics or system components. Requires coordination across multiple development streams.
| Status | pending |
| Type | Integration |
| Estimated | 4h |
| Tier | 7 |
Cancelling in-flight Supabase HTTP requests via RxDart switchMap may not actually abort the server-side query if the Supabase Dart client does not support request cancellation tokens, leading to wasted API calls and potential race conditions where a slow earlier response arrives after a faster later one.
Mitigation & Contingency
Mitigation: Audit the supabase-flutter client's cancellation support before implementation. Use RxDart switchMap to discard stale emissions even if HTTP cancellation is unavailable, ensuring only the latest result reaches the UI.
Contingency: If race conditions surface in testing, add a query sequence counter to tag each emission and discard any response whose sequence number is lower than the most recently emitted one.
Connectivity detection used to route between online and offline repositories may have latency or give false positives on flaky connections, causing the service to attempt Supabase queries that time out instead of falling back to the cache promptly.
Mitigation & Contingency
Mitigation: Use a try/catch with a short timeout on Supabase calls. On network error, immediately fall back to the offline repository and emit a cached result with an offline indicator rather than surfacing an error state.
Contingency: If the timeout-based fallback proves insufficient, implement a connection health check stream that pre-validates connectivity before each query batch.