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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >/**<span class="fstat-no" title="function not covered" ><span class="branch-0 cbranch-no" title="branch not covered" ></span></span></span>
 * 队列服务
 * 
 * 【架构职责】
 * 队列只负责：排队 + 并发控制
 * 
 * 【职责边界】
 * - ✅ 做：任务排队、并发限制、任务分发
 * - ❌ 不做：失败重试、超时管理、业务逻辑
 * 
 * 【设计原则】
 * - 单一职责：队列只管排队，不管其他
 * - 失败重试 → 容错层（fault-tolerance.ts）
 * - 超时管理 → AI服务层（llm.service.ts）
 * - 业务逻辑 → 领域层（langgraph-generator.ts）
 */
&nbsp;
import Queue from 'bull';
import { redisService } from './redis.service';
import { memoryQueue } from './memory-queue';
&nbsp;
// 任务队列类型
<span class="cstat-no" title="statement not covered" >export enum QueueType {</span>
<span class="cstat-no" title="statement not covered" >  AUDIO_GENERATION = 'audio:generation',</span>
<span class="cstat-no" title="statement not covered" >  VIDEO_GENERATION = 'video:generation',</span>
<span class="cstat-no" title="statement not covered" >  BOOK_GENERATION = 'book:generation',</span>
<span class="cstat-no" title="statement not covered" >  EMAIL_SEND = 'email:send',</span>
}
&nbsp;
// 任务状态
<span class="cstat-no" title="statement not covered" >export enum TaskStatus {</span>
<span class="cstat-no" title="statement not covered" >  WAITING = 'waiting',</span>
<span class="cstat-no" title="statement not covered" >  ACTIVE = 'active',</span>
<span class="cstat-no" title="statement not covered" >  COMPLETED = 'completed',</span>
<span class="cstat-no" title="statement not covered" >  FAILED = 'failed',</span>
<span class="cstat-no" title="statement not covered" >  DELAYED = 'delayed',</span>
}
&nbsp;
// 任务数据接口
interface TaskData {
  userId?: number;
  [key: string]: any;
}
&nbsp;
// 任务进度回调
export type ProgressCallback = (progress: number, data?: any) =&gt; void;
&nbsp;
<span class="cstat-no" title="statement not covered" >class QueueService {</span>
<span class="cstat-no" title="statement not covered" >  private queues: Map&lt;string, Queue.Queue&gt; = new Map();</span>
<span class="cstat-no" title="statement not covered" >  private progressCallbacks: Map&lt;string, ProgressCallback&gt; = new Map();</span>
<span class="cstat-no" title="statement not covered" >  private queueAvailable: boolean = true;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  constructor() {</span>
    // 如果 Redis 不可用，记录警告但不阻止程序运行
<span class="cstat-no" title="statement not covered" >    if (!redisService.isAvailable()) {</span>
<span class="cstat-no" title="statement not covered" >      console.warn('[Queue] Redis 不可用，任务队列将无法正常工作');</span>
<span class="cstat-no" title="statement not covered" >      this.queueAvailable = false;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 检查队列是否可用
   */
<span class="cstat-no" title="statement not covered" >  isQueueAvailable(): boolean {</span>
<span class="cstat-no" title="statement not covered" >    return this.queueAvailable &amp;&amp; redisService.isAvailable();</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 获取或创建队列
   * @param queueName 队列名称
   */
<span class="cstat-no" title="statement not covered" >  private getQueue(queueName: string): Queue.Queue | null {</span>
<span class="cstat-no" title="statement not covered" >    if (!this.isQueueAvailable()) {</span>
<span class="cstat-no" title="statement not covered" >      return null;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (!this.queues.has(queueName)) {</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        const queue = new Queue(queueName, {</span>
<span class="cstat-no" title="statement not covered" >          redis: {</span>
<span class="cstat-no" title="statement not covered" >            host: process.env.REDIS_HOST || 'localhost',</span>
<span class="cstat-no" title="statement not covered" >            port: parseInt(process.env.REDIS_PORT || '6379'),</span>
<span class="cstat-no" title="statement not covered" >            password: process.env.REDIS_PASSWORD || undefined,</span>
<span class="cstat-no" title="statement not covered" >            db: parseInt(process.env.REDIS_DB || '0'),</span>
<span class="cstat-no" title="statement not covered" >            maxRetriesPerRequest: null,</span>
<span class="cstat-no" title="statement not covered" >          },</span>
<span class="cstat-no" title="statement not covered" >          defaultJobOptions: {</span>
<span class="cstat-no" title="statement not covered" >            removeOnComplete: 100,</span>
<span class="cstat-no" title="statement not covered" >            removeOnFail: 50,</span>
<span class="cstat-no" title="statement not covered" >          },</span>
<span class="cstat-no" title="statement not covered" >          settings: {</span>
<span class="cstat-no" title="statement not covered" >            stalledInterval: 10 * 60 * 1000,</span>
<span class="cstat-no" title="statement not covered" >            maxStalledCount: 10,</span>
<span class="cstat-no" title="statement not covered" >          }</span>
<span class="cstat-no" title="statement not covered" >        });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        queue.on('completed', (job) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >          console.log(`[Queue] 任务完成: ${queueName}#${job.id}`);</span>
<span class="cstat-no" title="statement not covered" >          this.clearProgressCallback(job.id.toString());</span>
<span class="cstat-no" title="statement not covered" >        });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        queue.on('failed', (job, err) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >          console.error(`[Queue] 任务失败: ${queueName}#${job.id}`, err.message);</span>
<span class="cstat-no" title="statement not covered" >          this.clearProgressCallback(job.id.toString());</span>
<span class="cstat-no" title="statement not covered" >        });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        queue.on('error', (err) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >          console.error(`[Queue] 队列错误: ${queueName}`, err.message);</span>
<span class="cstat-no" title="statement not covered" >          this.queueAvailable = false;</span>
<span class="cstat-no" title="statement not covered" >        });</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >        this.queues.set(queueName, queue);</span>
<span class="cstat-no" title="statement not covered" >        console.log(`[Queue] 队列初始化: ${queueName}`);</span>
<span class="cstat-no" title="statement not covered" >      } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >        console.error(`[Queue] 队列创建失败: ${queueName}`, error);</span>
<span class="cstat-no" title="statement not covered" >        this.queueAvailable = false;</span>
<span class="cstat-no" title="statement not covered" >        return null;</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    return this.queues.get(queueName) || null;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 添加任务到队列
   * @param queueType 队列类型
   * @param data 任务数据
   * @param options 任务选项
   * @returns 任务 ID 或 null（队列不可用时）
   */
<span class="cstat-no" title="statement not covered" >  async addTask(</span>
<span class="cstat-no" title="statement not covered" >    queueType: QueueType,</span>
<span class="cstat-no" title="statement not covered" >    data: TaskData,</span>
<span class="cstat-no" title="statement not covered" >    options: Queue.JobOptions = {}</span>
<span class="cstat-no" title="statement not covered" >  ): Promise&lt;string | null&gt; {</span>
    // 如果 Redis 从未可用过，或已回退到内存队列，直接走内存队列
    // 避免 Redis 变可用后任务走 Bull（无处理器）而内存队列收不到
<span class="cstat-no" title="statement not covered" >    if (!this.queueAvailable) {</span>
<span class="cstat-no" title="statement not covered" >      return this.addToMemoryQueue(queueType, data);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // 尝试 Redis 队列
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    if (queue) {</span>
<span class="cstat-no" title="statement not covered" >      try {</span>
<span class="cstat-no" title="statement not covered" >        const job = await queue.add(data, options);</span>
<span class="cstat-no" title="statement not covered" >        console.log(`[Queue] 任务添加(Redis): ${queueType}#${job.id}`);</span>
<span class="cstat-no" title="statement not covered" >        return job.id.toString();</span>
<span class="cstat-no" title="statement not covered" >      } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >        console.error(`[Queue] Redis 任务添加失败:`, error);</span>
<span class="cstat-no" title="statement not covered" >        this.queueAvailable = false;</span>
        // Fallback 到内存队列
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
    // Fallback: 使用内存队列
<span class="cstat-no" title="statement not covered" >    return this.addToMemoryQueue(queueType, data);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /** 统一走内存队列 */
<span class="cstat-no" title="statement not covered" >  private async addToMemoryQueue(queueType: QueueType, data: TaskData): Promise&lt;string | null&gt; {</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Queue] 使用内存队列: ${queueType}`, Object.keys(data));</span>
<span class="cstat-no" title="statement not covered" >    try {</span>
<span class="cstat-no" title="statement not covered" >      const jobId = await memoryQueue.add(queueType, data);</span>
<span class="cstat-no" title="statement not covered" >      console.log(`[Queue] 内存队列任务添加成功: ${jobId}`);</span>
<span class="cstat-no" title="statement not covered" >      return jobId;</span>
<span class="cstat-no" title="statement not covered" >    } catch (error) {</span>
<span class="cstat-no" title="statement not covered" >      console.error(`[Queue] 内存队列也失败了:`, error);</span>
<span class="cstat-no" title="statement not covered" >      return null;</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 添加音频生成任务
   * @param data 任务数据
   */
<span class="cstat-no" title="statement not covered" >  async addAudioGenerationTask(data: TaskData): Promise&lt;string | null&gt; {</span>
<span class="cstat-no" title="statement not covered" >    return this.addTask(QueueType.AUDIO_GENERATION, data, {</span>
<span class="cstat-no" title="statement not covered" >      timeout: 300000, // 5 分钟超时</span>
<span class="cstat-no" title="statement not covered" >    });</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 添加视频生成任务
   * @param data 任务数据
   */
<span class="cstat-no" title="statement not covered" >  async addVideoGenerationTask(data: TaskData): Promise&lt;string | null&gt; {</span>
<span class="cstat-no" title="statement not covered" >    return this.addTask(QueueType.VIDEO_GENERATION, data, {</span>
<span class="cstat-no" title="statement not covered" >      timeout: 600000, // 10 分钟超时</span>
<span class="cstat-no" title="statement not covered" >    });</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 添加书籍生成任务
   * @param data 任务数据
   */
<span class="cstat-no" title="statement not covered" >  async addBookGenerationTask(data: TaskData): Promise&lt;string | null&gt; {</span>
<span class="cstat-no" title="statement not covered" >    return this.addTask(QueueType.BOOK_GENERATION, data, {</span>
<span class="cstat-no" title="statement not covered" >      timeout: 7200000, // 2小时超时（一本书完整生成约40-60分钟）</span>
<span class="cstat-no" title="statement not covered" >    });</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 获取任务状态
   * @param queueType 队列类型
   * @param jobId 任务 ID
   */
<span class="cstat-no" title="statement not covered" >  async getTaskStatus(queueType: QueueType, jobId: string): Promise&lt;{</span>
    status: TaskStatus;
    progress: number;
    data?: any;
    error?: string;
<span class="cstat-no" title="statement not covered" >  }&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    if (!queue) {</span>
<span class="cstat-no" title="statement not covered" >      return {</span>
<span class="cstat-no" title="statement not covered" >        status: TaskStatus.FAILED,</span>
<span class="cstat-no" title="statement not covered" >        progress: 0,</span>
<span class="cstat-no" title="statement not covered" >        error: '队列不可用',</span>
<span class="cstat-no" title="statement not covered" >      };</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const job = await queue.getJob(jobId);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (!job) {</span>
<span class="cstat-no" title="statement not covered" >      return {</span>
<span class="cstat-no" title="statement not covered" >        status: TaskStatus.FAILED,</span>
<span class="cstat-no" title="statement not covered" >        progress: 0,</span>
<span class="cstat-no" title="statement not covered" >        error: '任务不存在',</span>
<span class="cstat-no" title="statement not covered" >      };</span>
<span class="cstat-no" title="statement not covered" >    }</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    const state = await job.getState();</span>
<span class="cstat-no" title="statement not covered" >    const statusMap: Record&lt;string, TaskStatus&gt; = {</span>
<span class="cstat-no" title="statement not covered" >      waiting: TaskStatus.WAITING,</span>
<span class="cstat-no" title="statement not covered" >      active: TaskStatus.ACTIVE,</span>
<span class="cstat-no" title="statement not covered" >      completed: TaskStatus.COMPLETED,</span>
<span class="cstat-no" title="statement not covered" >      failed: TaskStatus.FAILED,</span>
<span class="cstat-no" title="statement not covered" >      delayed: TaskStatus.DELAYED,</span>
<span class="cstat-no" title="statement not covered" >    };</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    return {</span>
<span class="cstat-no" title="statement not covered" >      status: statusMap[state] || TaskStatus.FAILED,</span>
<span class="cstat-no" title="statement not covered" >      progress: job.progress() || 0,</span>
<span class="cstat-no" title="statement not covered" >      data: job.returnvalue,</span>
<span class="cstat-no" title="statement not covered" >      error: job.failedReason,</span>
<span class="cstat-no" title="statement not covered" >    };</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 更新任务进度
   * @param queueType 队列类型
   * @param jobId 任务 ID
   * @param progress 进度 (0-100)
   * @param data 附加数据
   */
<span class="cstat-no" title="statement not covered" >  async updateProgress(</span>
<span class="cstat-no" title="statement not covered" >    queueType: QueueType,</span>
<span class="cstat-no" title="statement not covered" >    jobId: string,</span>
<span class="cstat-no" title="statement not covered" >    progress: number,</span>
<span class="cstat-no" title="statement not covered" >    data?: any</span>
<span class="cstat-no" title="statement not covered" >  ): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    if (!queue) {</span>
<span class="cstat-no" title="statement not covered" >      return;  // 队列不可用时静默忽略</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >    const job = await queue.getJob(jobId);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >    if (job) {</span>
<span class="cstat-no" title="statement not covered" >      await job.progress(progress);</span>
      
      // 触发进度回调
<span class="cstat-no" title="statement not covered" >      const callback = this.progressCallbacks.get(jobId);</span>
<span class="cstat-no" title="statement not covered" >      if (callback) {</span>
<span class="cstat-no" title="statement not covered" >        callback(progress, data);</span>
<span class="cstat-no" title="statement not covered" >      }</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 注册进度回调
   * @param jobId 任务 ID
   * @param callback 回调函数
   */
<span class="cstat-no" title="statement not covered" >  onProgress(jobId: string, callback: ProgressCallback): void {</span>
<span class="cstat-no" title="statement not covered" >    this.progressCallbacks.set(jobId, callback);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 清除进度回调
   * @param jobId 任务 ID
   */
<span class="cstat-no" title="statement not covered" >  clearProgressCallback(jobId: string): void {</span>
<span class="cstat-no" title="statement not covered" >    this.progressCallbacks.delete(jobId);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 获取队列统计信息
   * @param queueType 队列类型
   */
<span class="cstat-no" title="statement not covered" >  async getQueueStats(queueType: QueueType): Promise&lt;{</span>
    waiting: number;
    active: number;
    completed: number;
    failed: number;
    delayed: number;
<span class="cstat-no" title="statement not covered" >  }&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    const counts = await queue.getJobCounts();</span>
<span class="cstat-no" title="statement not covered" >    return counts;</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 清空队列
   * @param queueType 队列类型
   */
<span class="cstat-no" title="statement not covered" >  async clearQueue(queueType: QueueType): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    await queue.empty();</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Queue] 队列清空: ${queueType}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 暂停队列
   * @param queueType 队列类型
   */
<span class="cstat-no" title="statement not covered" >  async pauseQueue(queueType: QueueType): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    await queue.pause();</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Queue] 队列暂停: ${queueType}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 恢复队列
   * @param queueType 队列类型
   */
<span class="cstat-no" title="statement not covered" >  async resumeQueue(queueType: QueueType): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    const queue = this.getQueue(queueType);</span>
<span class="cstat-no" title="statement not covered" >    await queue.resume();</span>
<span class="cstat-no" title="statement not covered" >    console.log(`[Queue] 队列恢复: ${queueType}`);</span>
<span class="cstat-no" title="statement not covered" >  }</span>
&nbsp;
  /**
   * 关闭所有队列
   */
<span class="cstat-no" title="statement not covered" >  async closeAll(): Promise&lt;void&gt; {</span>
<span class="cstat-no" title="statement not covered" >    for (const [name, queue] of this.queues) {</span>
<span class="cstat-no" title="statement not covered" >      await queue.close();</span>
<span class="cstat-no" title="statement not covered" >      console.log(`[Queue] 队列关闭: ${name}`);</span>
<span class="cstat-no" title="statement not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >    this.queues.clear();</span>
<span class="cstat-no" title="statement not covered" >  }</span>
<span class="cstat-no" title="statement not covered" >}</span>
&nbsp;
// 导出单例
<span class="cstat-no" title="statement not covered" >export const queueService = new QueueService();</span>
<span class="cstat-no" title="statement not covered" >export default queueService;</span>
&nbsp;</pre></td></tr></table></pre>

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