@binart/jx-patterns v1.0.2

编程范型

设计模式

责任链

// 错误定义
export class ExampleError extends Error {
  constructor(message) {
    super(message);
    this.name = 'ExampleError';
  }
}

// 规则定义
export class ExampleRule extends ChainNode {
  canHandle(...args: any[]): boolean {
    // 获取配置项目，是否支持该规则检查
  }

  handle(msg): any {
    // 执行规则检查
    if (msg.type === 1) {
      let timeInterval = 100;
      if (timeInterval > 0) {
        throw new ExampleRule();
      }
    }
  }
}

// 规则检查、错误处理
const _chainChecker = new ChainContainer()

_chainChecker.add(new ExampleRule());

try {
  _chainChecker.handle(msg);
} catch (err) {
  if (err instanceof ValidationError) {
    throw new ReadError("Validation Error", err);
  } else {
    throw err;
  }
}

状态机

???