多worker共享事件（不稳定

hydro/model/task.js

@@ -1,3 +1,4 @@
+const cluster = require('cluster');
 const moment = require('moment-timezone');
 const db = require('../service/db');
 
@@ -6,6 +7,8 @@ const coll = db.collection('task');
 async function add(task) {
     const t = { ...task };
     if (typeof t.executeAfter === 'object') t.executeAfter = t.executeAfter.getTime();
+    t.count = t.count || 1;
+    t.wait = t.wait || Object.keys(cluster.workers);
     t.executeAfter = t.executeAfter || new Date().getTime();
     const res = await coll.insertOne(t);
     return res.insertedId;
@@ -26,9 +29,16 @@ function del(_id) {
 async function getFirst(query) {
     const q = { ...query };
     q.executeAfter = q.executeAfter || { $lt: new Date().getTime() };
+    q.wait = { $elemMatch: { $eq: cluster.worker.id } };
     const res = await coll.find(q).sort('_id', 1).limit(1).toArray();
     if (res.length) {
-        await coll.deleteOne({ _id: res[0]._id });
+        if (res[0].count === 1) await coll.deleteOne({ _id: res[0]._id });
+        else {
+            await coll.updateOne(
+                { _id: res[0]._id },
+                { $inc: { count: -1 }, $pull: { wait: cluster.worker.id } },
+            );
+        }
         if (res[0].interval) {
             await coll.insertOne({
                 ...res[0], executeAfter: moment().add(...res[0].interval).toDate(),