# Summary: Plan 02 - Gateway Infrastructure

**Phase:** 01-gateway-routing
**Plan:** 02
**Status:** Completed
**Date:** 2026-03-03

---

## Tasks Completed

### Task 1: GatewayDbContext (Integrated into PlatformDbContext)
- **Status:** Done
- **Location:** `Fengling.Platform.Infrastructure/PlatformDbContext.cs`
- **Details:** Gateway DbSets integrated into PlatformDbContext (not separate file)
  - `DbSet<GwTenant> GwTenants`
  - `DbSet<GwTenantRoute> GwTenantRoutes`
  - `DbSet<GwServiceInstance> GwServiceInstances`
- **Indexes configured:**
  - GwTenant: TenantCode unique
  - GwTenantRoute: TenantCode, ServiceName, ClusterId, composite (ServiceName, IsGlobal, Status)
  - GwServiceInstance: composite unique (ClusterId, DestinationId), Health

### Task 2: IRouteStore and RouteStore
- **Status:** Done
- **Files:**
  - `Fengling.Platform.Infrastructure/IRouteStore.cs`
  - `Fengling.Platform.Infrastructure/RouteStore.cs`
- **Pattern:** Follows TenantStore pattern with generic constraint `where TContext : PlatformDbContext`
- **Methods:** FindByIdAsync, FindByTenantCodeAsync, FindByClusterIdAsync, GetAllAsync, GetPagedAsync, GetCountAsync, CreateAsync, UpdateAsync, DeleteAsync
- **Features:** Soft delete support, paged queries with filters

### Task 3: IRouteManager and RouteManager
- **Status:** Done
- **Files:**
  - `Fengling.Platform.Infrastructure/IRouteManager.cs`
  - `Fengling.Platform.Infrastructure/RouteManager.cs`
- **Pattern:** Delegates to IRouteStore (matches TenantManager pattern)
- **Constructor:** `public RouteManager(IRouteStore store)`
- **Methods:** FindByIdAsync, FindByTenantCodeAsync, GetAllAsync, CreateRouteAsync, UpdateRouteAsync, DeleteRouteAsync

### Task 4: IInstanceStore and InstanceStore
- **Status:** Done
- **Files:**
  - `Fengling.Platform.Infrastructure/IInstanceStore.cs`
  - `Fengling.Platform.Infrastructure/InstanceStore.cs`
- **Pattern:** Similar to RouteStore, generic constraint `where TContext : PlatformDbContext`
- **Methods:** FindByIdAsync, FindByClusterIdAsync, FindByDestinationAsync, GetAllAsync, GetPagedAsync, GetCountAsync, CreateAsync, UpdateAsync, DeleteAsync
- **Features:** ClusterId and DestinationId queries, health/status filtering

---

## Verification

- [x] Build passes with 0 errors
- [x] Store implementations follow TenantStore pattern
- [x] Manager implementations delegate to Stores
- [x] DbContext contains all required DbSets and indexes
- [x] Soft delete implemented in all Store classes

---

## Key Decisions

1. **DbContext Location:** Gateway entities integrated into PlatformDbContext rather than separate GatewayDbContext
   - Rationale: Follows existing project conventions, simplifies DI

2. **ID Type:** Using `string` IDs for Gateway entities (consistent with source fengling-gateway)
   - GwTenant.Id, GwTenantRoute.Id, GwServiceInstance.Id are strings

3. **Soft Delete:** All Store implementations support soft delete via `IsDeleted` property

---

## Artifacts Created

| File | Purpose |
|------|---------|
| `PlatformDbContext.cs` | Contains GwTenants, GwTenantRoutes, GwServiceInstances DbSets |
| `IRouteStore.cs` | Route CRUD interface |
| `RouteStore.cs` | Route data access implementation |
| `IRouteManager.cs` | Route business operations |
| `RouteManager.cs` | Route business logic |
| `IInstanceStore.cs` | Service instance CRUD interface |
| `InstanceStore.cs` | Service instance data access implementation |

---

## Next Steps

Plan 03 will add:
- Extensions for IoC registration
- `AddGatewayStores<TContext>()` extension method
- DI configuration for Managers and Stores