pluginaweek/state_machine
State Machine
该项目是一个 Ruby 库，用于通过状态、事件和转换规则定义和管理对象生命周期。它作为一个声明式工作流引擎，通过将属性更改限制为 Ruby 类中的预定义有效路径来强制执行业务逻辑。
该库通过与数据库持久层深度集成脱颖而出，允许它自动将状态更改与数据模型、验证框架和事务管理同步。它支持动态配置，能够从外部数据源在运行时构建生命周期规则，并提供诊断工具（如状态关系的可视化图表和转换路径分析）来审计复杂工作流。
除了核心转换管理外，该框架还包括一个回调驱动的钩子系统，用于在生命周期更新期间执行自定义逻辑，并提供用于查询当前对象状态或验证允许转换的方法。它还具有动态方法注入功能，可直接在对象上处理状态查询和事件触发。
Features
- Lifecycle Management - Provides a framework for managing the lifecycle of Ruby objects through state transitions.
- Ruby Frameworks and Tools - Provides a framework for defining and managing object lifecycles through states, events, and transition rules.
- Application State Management - Synchronizes object state transitions with database persistence layers and validation logic.
- Automatic State Persistence - Synchronizes state changes with database layers to handle validation, transactions, and persistence.
- Declarative Workflow Definitions - Enforces business logic by restricting attribute changes to predefined, valid state transition paths.
- State Transition Event Triggers - Manages object state changes by evaluating rules and triggering transitions in response to specific events.
- Application State Machines - Provides a declarative DSL for defining states, events, and transition rules to manage object lifecycles.
- Data Integration & Synchronization - Integrates with data models to synchronize state changes with validation frameworks and observer patterns.
- ORM Integrations - Integrates with ORM persistence layers to support automatic saving and transaction management.
- State Transition Handlers - Executes state transitions by validating rules and triggering persistence actions during the lifecycle update process.
- Event-Driven Workflows - Triggers custom logic and side effects automatically when object states change.
- Dynamic Configuration Engines - Enables building and adapting lifecycle rules at runtime from external data sources.
- State Lifecycle Callbacks - Executes custom logic automatically upon entering or exiting specific states during lifecycle transitions.
- Architectural State Machines - Maintains internal state representations to calculate valid paths and verify reachability between states.
- Custom State Transition Hooks - Supports callback hooks to execute custom logic before, after, or around state changes for side effects and validation.
