# Architecture (State 004 Containerized Compose Runtime)

> For the complete documentation index, see [llms.txt](https://deploy-preview-472--lucky-concha-f3599f.netlify.app/llms.txt).

State 004 preserves state 002 routing semantics while moving runtime to Docker Compose and NGINX ingress.

*   Inherits architectural baseline from: `002-edge-proxy-uncontainerized`
*   Generated from: `system/architecture.model.json`
*   Canonical flows: `../001-baseline-uncontainerized-parity/system/end-to-end-flows.md`

## Entry Points

*   `ingress`: `http://localhost:8080`
*   `angular-debug`: `http://localhost:18093`

## Architecture Diagram

Diagram source

```mermaid
flowchart LR
  trader["Trader Browser"]
  ingress["NGINX Ingress"]
  web["Web Front End Angular"]
  account["Account Service"]
  position["Position Service"]
  tradeService["Trade Service"]
  referenceData["Reference Data"]
  people["People Service"]
  tradeFeed["Trade Feed"]
  tradeProcessor["Trade Processor"]
  database["Database"]
  trader -->|"Single browser entrypoint"| ingress
  ingress -->|"/"| web
  ingress -->|"/account-service"| account
  ingress -->|"/position-service"| position
  ingress -->|"/trade-service"| tradeService
  ingress -->|"/reference-data"| referenceData
  ingress -->|"/people-service"| people
  ingress -->|"/trade-feed and /socket.io"| tradeFeed
  tradeService -->|"Validate account"| account
  tradeService -->|"Validate ticker"| referenceData
  tradeService -->|"Publish trades/new"| tradeFeed
  tradeProcessor -->|"Consume and publish updates"| tradeFeed
  tradeProcessor -->|"Persist trade/position state"| database
  account -->|"Account persistence"| database
  position -->|"Query trades/positions"| database
  account -->|"Validate person for account-user mapping"| people
```

## Node Catalog

| Node | Kind | Label | Notes |
| --- | --- | --- | --- |
| `trader` | actor | Trader Browser | User traffic enters through ingress. |
| `ingress` | gateway | NGINX Ingress | Compose ingress for UI/API/WebSocket routes. |
| `web` | frontend | Web Front End Angular | Containerized Angular service. |
| `account` | service | Account Service | Containerized Spring service. |
| `position` | service | Position Service | Containerized Spring service. |
| `tradeService` | service | Trade Service | Containerized Spring service. |
| `referenceData` | service | Reference Data | Containerized Node service. |
| `people` | service | People Service | Containerized .NET service. |
| `tradeFeed` | messaging | Trade Feed | Containerized Socket.IO bus. |
| `tradeProcessor` | service | Trade Processor | Containerized Spring service. |
| `database` | database | Database | Containerized H2 persistence service. |

## State Notes

*   State 004 preserves approved baseline functional behavior while changing runtime/ops model.
*   Inter-service network resolution uses Docker Compose service DNS names.