Differences

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--- flight_booking_bff [2025/12/31 09:54] – [Error Flow (Best Practice)] pradnya
+++ flight_booking_bff [2026/01/24 05:44] (current) – [Error Handling Strategy] madan
@@ Line 15: / Line 15: @@
 ==== Key Services / Core Components ====
-^Service^Responsibility|
+^Service^Responsibility^Local Port|
-|**API Gateway / BFF (Node.js)** |Single entry point for UI|
+|**API Gateway / BFF (Node.js)** |Single entry point for UI|4000|
-|**Auth Service** |Issues & validates tokens|
+|**Auth Service** |Issues & validates tokens|4001|
-|**Flight Service** |Calls supplier API + Redis cache|
+|**Flight Service** |Calls supplier API + Redis cache|4002|
-|**Booking Service (MySQL)** |Stores booking data|
+|**Booking Service (MySQL)** |Stores booking data|4003|
-|**Payment Service** |Payment initiation + webhooks|
+|**Payment Service** |Payment initiation + webhooks|4004|
 ==== Observability Stack ====
@@ Line 74: / Line 75: @@
 ^Layer^Purpose^Examples^Should define errors?|
 |**Domain** |Business rules|Entities, aggregates|**Business errors ** |
-|**Application** |Use-cases / orchestration|Services, DTOs|**App errors ** |
+|**Domain/Application** |Use-cases / orchestration|Services, DTOs|**App errors ** |
 |**Infrastructure** |Technical adapters|DB, Redis, HTTP|**Adapter-only errors ** |
 |**Interface/API** |Controllers|REST/GraphQL|no core errors|
@@ Line 99: / Line 100: @@
 </code>
 ===== MySQL — Connection Pool =====
@@ Line 506: / Line 510: @@
 ^Code^Meaning|
-|400|validation failure|
+|400|Bad Request/validation failure|
 |401|unauthorized|
 |404|cache expired|
@@ Line 609: / Line 613: @@
  ┣ /infrastructure
  ┃   ┗ /errors   ← Technical adapter errors (wrapped)
- ┗ /interfaces
+ ┗ /api (interfaces)
      ┗ error-middleware.ts  ← converts to HTTP response