# kemalq/message-validator architecture

> Architecture diagram of the GitHub repository kemalq/message-validator, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/kemalq/message-validator
- Repository: https://github.com/kemalq/message-validator

## Overview

Message Validator is a small, transport-independent Java utility for manually validating DTOs. A caller passes a DTO implementing `ValidatableMessage` to `MessageValidator`; validation uses Jakarta Bean Validation, and failures are reported as `IllegalArgumentException`. The README documents REST, messaging, service, persistence, and event-publishing use cases, but these are caller contexts rather than repository subsystems. Source excerpts were unavailable, so the relationships shown follow the README only.

Main entry points: [`src/main/java/com/example/validation/MessageValidator.java`](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/MessageValidator.java) (MessageValidator), [`src/main/java/com/example/validation/example/ExampleUserEventDTO.java`](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/example/ExampleUserEventDTO.java) (DTO Message), [`src/main/java/com/example/validation/ValidatableMessage.java`](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/ValidatableMessage.java) (ValidatableMessage)

## Diagram (Mermaid)

```mermaid
flowchart TD

node_caller(("Calling Code"))
node_message["DTO Message"]
node_contract["ValidatableMessage"]
node_validator["MessageValidator"]
node_bean_validation["Jakarta Bean Validation"]
node_failure["IllegalArgumentException"]

node_caller -->|"invokes"| node_validator
node_caller -->|"provides"| node_message
node_message -->|"implements"| node_contract
node_validator -->|"validates with"| node_bean_validation
node_validator -->|"throws on failure"| node_failure

click node_message "https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/example/ExampleUserEventDTO.java"
click node_contract "https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/ValidatableMessage.java"
click node_validator "https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/MessageValidator.java"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_caller,node_bean_validation,node_failure toneIndigo
class node_message,node_contract,node_validator toneTeal
```

## Components

### Other components

- **Calling Code**
- [DTO Message](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/example/ExampleUserEventDTO.java): `src/main/java/com/example/validation/example/ExampleUserEventDTO.java`
- [ValidatableMessage](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/ValidatableMessage.java): `src/main/java/com/example/validation/ValidatableMessage.java`
- [MessageValidator](https://github.com/kemalq/message-validator/blob/master/src/main/java/com/example/validation/MessageValidator.java): `src/main/java/com/example/validation/MessageValidator.java`
- **Jakarta Bean Validation**
- **IllegalArgumentException**

## Connections

- Calling Code → MessageValidator: invokes
- Calling Code → DTO Message: provides
- DTO Message → ValidatableMessage: implements
- MessageValidator → Jakarta Bean Validation: validates with
- MessageValidator → IllegalArgumentException: throws on failure