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* event-orchestrator - 主入口文件
*
* 基于事件驱动架构 (EDA) 的技能编排器
* 应用设计模式：EDA、Middleware 链、状态机
*/
const { EventBus } = require('./event-bus');
const {
LoggingMiddleware,
ValidationMiddleware,
RetryMiddleware,
RateLimitMiddleware,
MiddlewareChainExecutor
} = require('./middleware-chain');
const {
OrchestrationState,
StateMachine,
OrchestrationTask
} = require('./state-machine');
/**
* 事件编排器主类
*/
class EventOrchestrator {
constructor(options = {}) {
this.eventBus = new EventBus({
maxHistorySize: options.maxHistorySize || 1000
});
this.tasks = new Map();
this.options = options;
// 注册默认中间件
this._registerDefaultMiddleware();
}
/**
* 注册默认中间件
*/
_registerDefaultMiddleware() {
// 日志中间件
this.eventBus.use(new LoggingMiddleware({ logLevel: 'info' }));
// 速率限制中间件
this.eventBus.use(new RateLimitMiddleware({
maxEvents: 100,
windowMs: 60000
}));
}
/**
* 注册事件 Schema
*/
registerSchema(eventName, schema) {
this.eventBus.registerSchema(eventName, schema);
}
/**
* 订阅事件
*/
subscribe(eventName, handler, options = {}) {
return this.eventBus.subscribe(eventName, handler, options);
}
/**
* 取消订阅
*/
unsubscribe(eventName, subscriberId) {
return this.eventBus.unsubscribe(eventName, subscriberId);
}
/**
* 发布事件
*/
async publish(eventName, payload = {}, metadata = {}) {
return await this.eventBus.publish(eventName, payload, metadata);
}
/**
* 创建编排任务
*/
createTask(taskId, definition) {
const task = new OrchestrationTask(taskId, definition);
this.tasks.set(taskId, task);
return task;
}
/**
* 获取任务状态
*/
getTaskStatus(taskId) {
const task = this.tasks.get(taskId);
if (!task) {
return { error: 'Task not found', taskId };
}
return task.getStatus();
}
/**
* 获取所有任务状态
*/
getAllTasksStatus() {
const status = {};
for (const [taskId, task] of this.tasks.entries()) {
status[taskId] = task.getStatus();
}
return status;
}
/**
* 获取事件历史
*/
getEventHistory(limit = 100, eventName = null) {
return this.eventBus.getHistory(limit, eventName);
}
/**
* 获取订阅者统计
*/
getSubscriberStats() {
return this.eventBus.getSubscriberStats();
}
/**
* 添加自定义中间件
*/
useMiddleware(middleware) {
this.eventBus.use(middleware);
}
/**
* 清空所有数据
*/
clear() {
this.eventBus.clearHistory();
this.tasks.clear();
}
/**
* 导出状态
*/
exportState() {
return {
tasks: Array.from(this.tasks.entries()).map(([id, task]) => ({
id,
status: task.getStatus()
})),
eventHistory: this.eventBus.getHistory(1000),
subscriberStats: this.eventBus.getSubscriberStats(),
exportedAt: Date.now()
};
}
}
/**
* 预定义事件 Schema
*/
const EventSchemas = {
// 技能执行事件
'skill.started': {
skillId: 'string',
taskId: 'string',
parameters: 'object'
},
'skill.completed': {
skillId: 'string',
taskId: 'string',
result: 'object',
duration: 'number'
},
'skill.failed': {
skillId: 'string',
taskId: 'string',
error: 'string',
retryCount: 'number'
},
// 任务编排事件
'task.created': {
taskId: 'string',
definition: 'object',
priority: 'number'
},
'task.started': {
taskId: 'string',
startedAt: 'number'
},
'task.completed': {
taskId: 'string',
completedAt: 'number',
result: 'object'
},
'task.failed': {
taskId: 'string',
failedAt: 'number',
error: 'string'
},
// 系统事件
'system.ready': {
version: 'string',
timestamp: 'number'
},
'system.shutdown': {
reason: 'string',
timestamp: 'number'
}
};
module.exports = {
EventOrchestrator,
EventBus,
EventSchemas,
OrchestrationState,
StateMachine,
OrchestrationTask,
LoggingMiddleware,
ValidationMiddleware,
RetryMiddleware,
RateLimitMiddleware
};
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