# sonalisahu728/librarymanagement architecture

> Architecture diagram of the GitHub repository sonalisahu728/librarymanagement, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-30). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/sonalisahu728/librarymanagement
- Repository: https://github.com/sonalisahu728/librarymanagement

## Overview

This is a small Spring Boot library catalog for managing book records. The documented workflow is a browser/client making REST requests to the book controller, which delegates through the service and repository layers to persistent storage. The README also describes a static web interface, a Book entity, and PostgreSQL persistence configured for Hibernate and Spring Data JPA. No source excerpts were provided, so relationships below rely on the README’s architecture and feature descriptions; implementation details beyond those documented are omitted.

Main entry points: [`src/main/java/com/example/demo/controller/BookController.java`](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/controller/BookController.java) (Book controller), [`src/main/java/com/example/demo/service/BookService.java`](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/service/BookService.java) (Book service), [`src/main/java/com/example/demo/repository/BookRepository.java`](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/repository/BookRepository.java) (Book repository), [`src/main/java/com/example/demo/entity/Book.java`](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/entity/Book.java) (Book entity)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Client interface"]
  node_web["Web interface<br/>[index.html]"]
end

subgraph group_backend["Book management"]
  node_app["Spring Boot app"]
  node_controller["Book controller"]
  node_service["Book service<br/>[BookService.java]"]
  node_entity["Book entity<br/>[Book.java]"]
end

subgraph group_persistence["Persistence"]
  node_repository["Book repository"]
  node_jpa["Spring Data JPA"]
  node_hibernate["Hibernate ORM"]
  node_config["Database config"]
end

node_browser(("Browser / client"))
node_postgres[("PostgreSQL")]

node_browser -->|"sends REST requests"| node_controller
node_browser -->|"uses interface"| node_web
node_controller -->|"communicates with"| node_service
node_service -->|"delegates to"| node_repository
node_repository -->|"uses"| node_jpa
node_jpa -->|"uses ORM"| node_hibernate
node_hibernate -->|"persists records"| node_postgres
node_entity -->|"represents table"| node_postgres
node_config -->|"configures connection"| node_postgres

click node_web "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/resources/static/index.html"
click node_app "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/LibraryManagementApplication.java"
click node_controller "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/controller/BookController.java"
click node_service "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/service/BookService.java"
click node_entity "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/entity/Book.java"
click node_repository "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/repository/BookRepository.java"
click node_config "https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/resources/application.properties"

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_web,node_browser toneBlue
class node_app,node_controller,node_service,node_entity,node_postgres toneAmber
class node_repository,node_jpa,node_hibernate,node_config toneMint
```

## Components

### Client interface

- [Web interface](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/resources/static/index.html): `src/main/resources/static/index.html`

### Book management

- [Spring Boot app](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/LibraryManagementApplication.java): `src/main/java/com/example/demo/LibraryManagementApplication.java`
- [Book controller](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/controller/BookController.java): `src/main/java/com/example/demo/controller/BookController.java`
- [Book service](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/service/BookService.java): `src/main/java/com/example/demo/service/BookService.java`
- [Book entity](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/entity/Book.java): `src/main/java/com/example/demo/entity/Book.java`

### Persistence

- [Book repository](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/java/com/example/demo/repository/BookRepository.java): `src/main/java/com/example/demo/repository/BookRepository.java`
- **Spring Data JPA**
- **Hibernate ORM**
- [Database config](https://github.com/sonalisahu728/librarymanagement/blob/main/src/main/resources/application.properties): `src/main/resources/application.properties`

### Other components

- **Browser / client**
- **PostgreSQL**

## Connections

- Browser / client → Book controller: sends REST requests (evidence: `README.md`)
- Browser / client → Web interface: uses interface (evidence: `README.md`)
- Book controller → Book service: communicates with (evidence: `README.md`)
- Book service → Book repository: delegates to (evidence: `README.md`)
- Book repository → Spring Data JPA: uses (evidence: `README.md`)
- Spring Data JPA → Hibernate ORM: uses ORM (evidence: `README.md`)
- Hibernate ORM → PostgreSQL: persists records (evidence: `README.md`)
- Book entity → PostgreSQL: represents table (evidence: `README.md`)
- Database config → PostgreSQL: configures connection (evidence: `README.md`)