update at 2026-02-08 18:28:39

miniprogram/utils/mp/worker-manager.js

@@ -0,0 +1,93 @@
+let singleton = null
+
+class SvgWorkerManager {
+  constructor() {
+    this.worker = wx.createWorker('workers/svg-generator/index.js')
+    this.pending = new Map()
+    this.timeoutMs = 30000
+
+    this.worker.onMessage((message) => {
+      const { requestId, success, data, error } = message || {}
+      const pendingTask = this.pending.get(requestId)
+      if (!pendingTask) {
+        return
+      }
+
+      clearTimeout(pendingTask.timer)
+      this.pending.delete(requestId)
+
+      if (success) {
+        pendingTask.resolve(data)
+      } else {
+        pendingTask.reject(new Error(error || 'Worker 执行失败'))
+      }
+    })
+
+    this.worker.onError((error) => {
+      this.rejectAll(error)
+    })
+
+    if (typeof this.worker.onProcessKilled === 'function') {
+      this.worker.onProcessKilled(() => {
+        this.rejectAll(new Error('Worker 进程被系统回收'))
+      })
+    }
+  }
+
+  rejectAll(error) {
+    for (const [requestId, pendingTask] of this.pending.entries()) {
+      clearTimeout(pendingTask.timer)
+      pendingTask.reject(error)
+      this.pending.delete(requestId)
+    }
+  }
+
+  request(type, payload, timeoutMs) {
+    const requestId = `${Date.now()}-${Math.random().toString(16).slice(2)}`
+    return new Promise((resolve, reject) => {
+      const timer = setTimeout(() => {
+        this.pending.delete(requestId)
+        reject(new Error(`Worker 超时: ${type}`))
+      }, timeoutMs || this.timeoutMs)
+
+      this.pending.set(requestId, { resolve, reject, timer })
+
+      this.worker.postMessage({
+        requestId,
+        type,
+        payload,
+      })
+    })
+  }
+
+  loadFont(fontId, fontBuffer) {
+    return this.request('load-font', {
+      fontId,
+      fontBuffer,
+    }, 45000)
+  }
+
+  generateSvg(params) {
+    return this.request('generate-svg', params, 45000)
+  }
+
+  clearCache() {
+    return this.request('clear-cache', {})
+  }
+
+  terminate() {
+    this.rejectAll(new Error('Worker 已终止'))
+    this.worker.terminate()
+  }
+}
+
+function getSvgWorkerManager() {
+  if (!singleton) {
+    singleton = new SvgWorkerManager()
+  }
+  return singleton
+}
+
+module.exports = {
+  getSvgWorkerManager,
+}