fix: Fix the resumeOnRestart function

Fix the resumeOnRestart function to handle correctl the recurring jobs + do not run finished non-recurrent jobs on restart + add unit tests

src/job/index.ts

@@ -186,7 +186,7 @@ class Job<T extends JobAttributesData = JobAttributesData> {
   attrs: JobAttributes<T>;
 
   constructor(options: Modify<JobAttributes<T>, { _id?: mongodb.ObjectId }>) {
-    const { pulse, type, nextRunAt, ...args } = options ?? {};
+    const { pulse, type, nextRunAt, repeatAt, repeatInterval, lastFinishedAt, ...args } = options ?? {};
 
     // Save Pulse instance
     this.pulse = pulse;
@@ -213,7 +213,10 @@ class Job<T extends JobAttributesData = JobAttributesData> {
       name: attrs.name || '',
       priority: attrs.priority,
       type: type || 'once',
-      nextRunAt: nextRunAt || new Date(),
+      // if a job that's non-recurring has a lastFinishedAt (finished the job), do not default nextRunAt to now
+      // only if it will be defaulted either by explicitly setting it or by computing it computeNextRunAt
+      nextRunAt:
+        repeatAt || repeatInterval ? nextRunAt || new Date() : !lastFinishedAt ? nextRunAt || new Date() : nextRunAt,
     };
   }
 

src/pulse/resume-on-restart.ts

@@ -1,5 +1,6 @@
 import createDebugger from 'debug';
 import { Pulse } from '.';
+import { Job } from '../job';
 
 const debug = createDebugger('pulse:resumeOnRestart');
 
@@ -18,18 +19,23 @@ export const resumeOnRestart: ResumeOnRestartMethod = function (this: Pulse, res
 
   if (this._collection && this._resumeOnRestart) {
     const now = new Date();
+
+    // Non-recurring jobs
     this._collection
       .updateMany(
         {
           $or: [
             {
               lockedAt: { $exists: true },
               nextRunAt: { $ne: null },
-              $or: [{ $expr: { $eq: ['$runCount', '$finishedCount'] } }, { lastFinishedAt: { $exists: false } }],
+              $or: [
+                { $expr: { $eq: ['$runCount', '$finishedCount'] } },
+                { $or: [{ lastFinishedAt: { $exists: false } }, { lastFinishedAt: null }] },
+              ],
             },
             {
               lockedAt: { $exists: false },
-              lastFinishedAt: { $exists: false },
+              $or: [{ lastFinishedAt: { $exists: false } }, { lastFinishedAt: null }],
               nextRunAt: { $lte: now, $ne: null },
             },
           ],
@@ -41,7 +47,50 @@ export const resumeOnRestart: ResumeOnRestartMethod = function (this: Pulse, res
       )
       .then((result) => {
         if (result.modifiedCount > 0) {
-          debug('resuming unfinished %d jobs(%s)', result.modifiedCount, now.toISOString());
+          debug('Resumed %d unfinished standard jobs (%s)', result.modifiedCount, now.toISOString());
+        }
+      });
+
+    // Recurring jobs
+    this._collection
+      .find({
+        $and: [
+          { $or: [{ repeatInterval: { $exists: true } }, { repeatAt: { $exists: true } }] },
+          { $or: [{ nextRunAt: { $lte: now } }, { nextRunAt: { $exists: false } }, { nextRunAt: null }] },
+        ],
+      })
+      .toArray()
+      .then((jobs) => {
+        const updates = jobs.map((jobData) => {
+          const job = new Job({
+            pulse: this,
+            name: jobData.name || '',
+            data: jobData.data || {},
+            type: jobData.type || 'normal',
+            priority: jobData.priority || 'normal',
+            shouldSaveResult: jobData.shouldSaveResult || false,
+            attempts: jobData.attempts || 0,
+            backoff: jobData.backoff,
+            ...jobData,
+          });
+
+          job.computeNextRunAt();
+
+          return this._collection.updateOne(
+            { _id: job.attrs._id },
+            {
+              $set: { nextRunAt: job.attrs.nextRunAt },
+              $unset: { lockedAt: undefined, lastModifiedBy: undefined, lastRunAt: undefined },
+            }
+          );
+        });
+
+        return Promise.all(updates);
+      })
+      .then((results) => {
+        const modifiedCount = results.filter((res) => res.modifiedCount > 0).length;
+        if (modifiedCount > 0) {
+          debug('Resumed %d recurring jobs (%s)', modifiedCount, now.toISOString());
         }
       });
   }

test/unit/pulse.spec.ts

@@ -218,6 +218,132 @@ describe('Test Pulse', () => {
       test('returns itself', () => {
         expect(globalPulseInstance.resumeOnRestart(false)).toEqual(globalPulseInstance);
       });
+
+      test('should not reschedule successfully finished non-recurring jobs', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.lastFinishedAt = new Date();
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt).toBeNull();
+      });
+
+      test('should resume non-recurring jobs on restart', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.nextRunAt = new Date(Date.now() - 1000);
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt?.getTime()).toBeGreaterThan(Date.now() - 100);
+      });
+
+      test('should resume recurring jobs on restart - interval', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.repeatInterval = '5 minutes';
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+      });
+
+      test('should resume recurring jobs on restart - cron', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.repeatInterval = '*/5 * * * *';
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+      });
+
+      test('should resume recurring jobs on restart - repeatAt', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.repeatAt = '1:00 am';
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+      });
+
+      test('should not modify jobs with existing nextRunAt', async () => {
+        const futureDate = new Date(Date.now() + 60 * 60 * 1000);
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.nextRunAt = futureDate;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt?.getTime()).toEqual(futureDate.getTime());
+      });
+
+      test('should handle jobs that started but have not finished (non-recurring)', async () => {
+        const job = globalPulseInstance.create('processData', { data: 'sample' });
+        job.attrs.nextRunAt = null;
+        job.attrs.lockedAt = new Date();
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'processData' }))[0];
+
+        const now = Date.now();
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+        expect(updatedJob.attrs.nextRunAt?.getTime()).toBeGreaterThan(now - 100);
+      });
+
+      test('should handle recurring jobs that started but have not finished', async () => {
+        const job = globalPulseInstance.create('processData', { data: 'sample' });
+        job.attrs.repeatInterval = '10 minutes';
+        job.attrs.lockedAt = new Date();
+        job.attrs.nextRunAt = new Date(Date.now() + 10000);
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'processData' }))[0];
+        expect(updatedJob.attrs.lockedAt).not.toBeNull();
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+      });
+
+      test('should handle interrupted recurring jobs after server recovery', async () => {
+        const job = globalPulseInstance.create('processData', { data: 'sample' });
+        job.attrs.repeatInterval = '5 minutes';
+        job.attrs.lastModifiedBy = 'server_crash';
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'processData' }))[0];
+        expect(updatedJob.attrs.nextRunAt).not.toBeNull();
+        expect(updatedJob.attrs.lastModifiedBy).not.toEqual('server_crash');
+      });
+
+      test('should not modify non-recurring jobs with lastFinishedAt in the past', async () => {
+        const job = globalPulseInstance.create('sendEmail', { to: '[email protected]' });
+        job.attrs.lastFinishedAt = new Date(Date.now() - 10000);
+        job.attrs.nextRunAt = null;
+        await job.save();
+
+        await globalPulseInstance.resumeOnRestart();
+
+        const updatedJob = (await globalPulseInstance.jobs({ name: 'sendEmail' }))[0];
+        expect(updatedJob.attrs.nextRunAt).toBeNull();
+      });
     });
   });