🎨【小程序】路由规则使用异步时，当前的appId没有传入到子线程，导致wxMaService在子线程中无法取到父线程的appId。 (#2961)

Author: biubiubiu3971

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/message/WxMaMessageRouter.java

@@ -2,6 +2,7 @@
 
 import cn.binarywang.wx.miniapp.api.WxMaService;
 import cn.binarywang.wx.miniapp.bean.WxMaMessage;
+import cn.binarywang.wx.miniapp.util.WxMaConfigHolder;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import lombok.Data;
 import me.chanjar.weixin.common.api.WxErrorExceptionHandler;
@@ -127,14 +128,15 @@ public WxMaXmlOutMessage route(final WxMaMessage wxMessage, final Map<String, Ob
     if (matchRules.size() == 0) {
       return null;
     }
-
+    String miniAppId = WxMaConfigHolder.get();
     final List<Future<?>> futures = new ArrayList<>();
     WxMaXmlOutMessage result = null;
     for (final WxMaMessageRouterRule rule : matchRules) {
       // 返回最后一个非异步的rule的执行结果
       if (rule.isAsync()) {
         futures.add(
           this.executorService.submit(() -> {
+            this.wxMaService.switchoverTo(miniAppId);
             rule.service(wxMessage, context, WxMaMessageRouter.this.wxMaService, WxMaMessageRouter.this.sessionManager, WxMaMessageRouter.this.exceptionHandler);
           })
         );