merged v3.0.0

Author: manast

CHANGELOG.md

@@ -1,3 +1,13 @@
+v.3.0.0-alpha.4
+===============
+
+- Implemented repeatable jobs. #252.
+
+v.3.0.0-alpha.3
+===============
+
+- Simplified global events #501.
+
 v.3.0.0-alpha.2
 ===============
 

README.md

@@ -35,9 +35,11 @@ Features:
 - Minimal CPU usage by poll-free design.
 - Robust design based on Redis.
 - Delayed jobs.
+- Schedule and repeat jobs according to a cron specification.
 - Retries.
 - Priority.
 - Concurrency.
+- Multiple job types per queue.
 - Pause/resume (globally or locally).
 - Automatic recovery from process crashes.
 
@@ -53,12 +55,9 @@ There are a few third party UIs that can be used for easier administration of th
 Roadmap:
 --------
 
-- Multiple job types per queue.
-- Scheduling jobs as a cron specification.
 - Rate limiter for jobs.
 - Parent-child jobs relationships.
 
-
 Install:
 --------
 
@@ -528,6 +527,8 @@ interface JobOpts{
   delay: number; // An amount of miliseconds to wait until this job can be processed. Note that for accurate delays, both 
                  // server and clients should have their clocks synchronized. [optional].
 
+  repeat: RepeatOpts; // Define repeat options for adding jobs according to a Cron specification.
+
   attempts: number; // The total number of attempts to try the job until it completes.
 
   backoff: number | BackoffOpts; // Backoff setting for automatic retries if the job fails
@@ -549,6 +550,14 @@ interface JobOpts{
 }
 ```
 
+```typescript
+interface RepeatOpts{
+  cron: string; // Cron expression. See https://github.com/harrisiirak/cron-parser for details.
+  endDate?: number | Date; // Stop repeating jobs after this date.
+  tz?: string; // Timezone. For example: 'Europe/Athens'
+}
+```
+
 ```typescript
 interface BackoffOpts{
   type: string; // Backoff type, which can be either `fixed` or `exponential`

lib/commands/moveToActive-4.lua

@@ -6,8 +6,6 @@
   expiration time. The worker is responsible of keeping the lock fresh
   so that no other worker picks this job again.
 
-  Note: This command only works in non-distributed redis deployments.
-
   Input:
       KEYS[1] wait key
       KEYS[2] active key
@@ -35,4 +33,3 @@ if jobId then
 
   return {redis.call("HGETALL", jobKey), jobId} -- get job data
 end
-

lib/commands/updateDelaySet-4.lua

@@ -1,5 +1,6 @@
 --[[
-  Updates the delay set
+  Updates the delay set, by picking a delayed job that should
+  be processed now.
   
      Input:
       KEYS[1] 'delayed'
@@ -18,7 +19,7 @@ local jobId = RESULT[1]
 local score = RESULT[2]
 if (score ~= nil) then
   score = score / 0x1000 
-  if (score <= tonumber(ARGV[2])) then
+  if (math.floor(score) <= tonumber(ARGV[2])) then
     redis.call("ZREM", KEYS[1], jobId)
     redis.call("LREM", KEYS[2], 0, jobId)
     redis.call("LPUSH", KEYS[3], jobId) -- not sure if it is better to move the job at the begining of the queue with LPUSH

lib/queue.js

@@ -19,6 +19,10 @@ var uuid = require('uuid');
 
 var commands = require('./commands/');
 
+Promise.config({
+  cancellation: true
+});
+
 /**
   Gets or creates a new Queue with the given name.
 
@@ -140,7 +144,7 @@ var Queue = function Queue(name, url, opts){
   this.eclient = createClient('subscriber', redisOpts);
 
   this.handlers = {};
-  this.delayTimer = null;
+  this.delayTimer = Promise.resolve();
   this.processing = [];
   this.retrieving = 0;
 
@@ -246,33 +250,16 @@ Queue.prototype.off = Queue.prototype.removeListener;
 
 Queue.prototype._init = function(name){
   var _this = this;
-  var initializers = [this.client, this.eclient].map(function (client) {
-    var _resolve, errorHandler;
-    return new Promise(function(resolve, reject) {
-      _resolve = resolve;
-      errorHandler = function(err){
-        if(err.code !== 'ECONNREFUSED'){
-          reject(err);
-        }
-      };
-      client.once('ready', resolve);
-      client.on('error', errorHandler);
-    }).finally(function(){
-      client.removeListener('ready', _resolve);
-      client.removeListener('error', errorHandler);
-    });
-  });
 
-  this._initializing = Promise.all(initializers).then(function(){
-    return _this.eclient.psubscribe(_this.toKey('') + '*');
-  }).then(function(){
-    return commands(_this.client);
-  }).then(function(){
-    debuglog(name + ' queue ready');
-  }, function(err){
-    _this.emit('error', err, 'Error initializing queue');
-    throw err;
-  });
+  this._initializing = _this.eclient.psubscribe(_this.toKey('') + '*')
+    .then(function(){
+      return commands(_this.client);
+    }).then(function(){
+      debuglog(name + ' queue ready');
+    }, function(err){
+      _this.emit('error', err, 'Error initializing queue');
+      throw err;
+    });
 };
 
 Queue.prototype._setupQueueEventListeners = function(){
@@ -375,7 +362,7 @@ Queue.prototype.close = function( doNotWaitJobs ){
     _.each(_this.errorRetryTimer, function(timer){
       clearTimeout(timer);
     });
-    clearTimeout(_this.delayTimer);
+    _this.delayTimer.cancel();
     clearInterval(_this.guardianTimer);
     clearInterval(_this.moveUnlockedJobsToWaitInterval);
     _this.timers.clearAll();
@@ -423,6 +410,58 @@ Queue.prototype.process = function(name, concurrency, handler){
   });
 };
 
+//
+// This code will be called everytime a job is going to be processed if the job has a repeat option. (from delay -> active).
+//
+var parser = require('cron-parser');
+
+function nextRepeatableJob(queue, name, data, opts){
+  var repeat = opts.repeat;
+  var repeatKey = queue.toKey('repeat') + ':' + name + ':' + repeat.cron;
+
+  //
+  // Get millis for this repeatable job.
+  //
+  return queue.client.get(repeatKey).then(function(millis){
+    if(millis){
+      return parseInt(millis);
+    }else{
+      return Date.now();
+    }
+  }).then(function(millis){
+    var interval = parser.parseExpression(repeat.cron, _.defaults({
+      currentDate: new Date(millis)
+    }, repeat));
+    var nextMillis;
+    try{
+      nextMillis = interval.next();
+    } catch(e){
+      // Ignore error
+    }
+    
+    if(nextMillis){
+      nextMillis = nextMillis.getTime();
+      var delay = nextMillis - millis;
+
+      //
+      // Generate unique job id for this iteration.
+      //
+      var customId = 'repeat:' + name + ':' + nextMillis;
+
+      //
+      // Set key and add job should be atomic.
+      //
+      return queue.client.set(repeatKey, nextMillis).then(function(){
+        return Job.create(queue, name, data, _.extend(_.clone(opts), {
+          jobId: customId,
+          delay: delay < 0 ? 0 : delay,
+          timestamp: Date.now()
+        }));
+      });
+    }
+  });
+};
+
 Queue.prototype.start = function(concurrency){
   var _this = this;
   return this.run(concurrency).catch(function(err){
@@ -449,6 +488,11 @@ Queue.prototype.setHandler = function(name, handler){
 interface JobOptions
 {
   attempts: number;
+
+  repeat: {
+    tz?: string,
+    endDate?: Date | string | number
+  }
 }
 */
 
@@ -459,7 +503,11 @@ interface JobOptions
   @param opts: JobOptions Options for this job.
 */
 Queue.prototype.add = function(name, data, opts){
-  return Job.create(this, name, data, opts);
+  if(opts && opts.repeat){
+    return nextRepeatableJob(this, name || DEFAULT_JOB_NAME, data, opts);
+  }else{
+    return Job.create(this, name, data, opts);
+  }
 };
 
 /**
@@ -588,14 +636,15 @@ Queue.prototype.run = function(concurrency){
 */
 Queue.prototype.updateDelayTimer = function(newDelayedTimestamp){
   var _this = this;
+  newDelayedTimestamp = Math.round(newDelayedTimestamp);
   if(newDelayedTimestamp < _this.delayedTimestamp && newDelayedTimestamp < (MAX_TIMEOUT_MS + Date.now())){
-    clearTimeout(this.delayTimer);
+    this.delayTimer.cancel();
     this.delayedTimestamp = newDelayedTimestamp;
 
     var nextDelayedJob = newDelayedTimestamp - Date.now();
-    nextDelayedJob = nextDelayedJob < 0 ? 0 : nextDelayedJob;
+    var delay = nextDelayedJob <= 0 ? Promise.resolve() : Promise.delay(nextDelayedJob);
 
-    this.delayTimer = setTimeout(function(){
+    this.delayTimer = delay.then(function(){
       scripts.updateDelaySet(_this, _this.delayedTimestamp).then(function(nextTimestamp){
         if(nextTimestamp){
           nextTimestamp = nextTimestamp < Date.now() ? Date.now() : nextTimestamp;
@@ -607,7 +656,7 @@ Queue.prototype.updateDelayTimer = function(newDelayedTimestamp){
         _this.emit('error', err, 'Error updating the delay timer');
       });
       _this.delayedTimestamp = Number.MAX_VALUE;
-    }, nextDelayedJob);
+    });
   }
 };
 
@@ -791,7 +840,13 @@ Queue.prototype.getNextJob = function() {
 
   return scripts.moveToActive(this).spread(function(jobData, jobId){
     if(jobData){
-      return Job.fromData(_this, jobData, jobId);
+      var job = Job.fromData(_this, jobData, jobId);
+      if(job.opts.repeat){
+        return nextRepeatableJob(_this, job.name, job.data, job.opts).then(function(){
+          return job;
+        });
+      }
+      return job;
     }else{
       return newJobs;
     }

package.json

@@ -1,6 +1,10 @@
 {
   "name": "bull",
+<<<<<<< HEAD
   "version": "3.0.0-alpha.3",
+=======
+  "version": "3.0.0-alpha.4",
+>>>>>>> 9fa6d0445c5c3cf5d09d049ea45d0923871adb58
   "description": "Job manager",
   "main": "./lib/queue",
   "repository": {
@@ -18,16 +22,18 @@
   "readmeFilename": "README.md",
   "dependencies": {
     "bluebird": "^3.5.0",
+    "cron-parser": "^2.4.0",
     "debuglog": "^1.0.0",
-    "ioredis": "^3.0.0-1",
+    "ioredis": "^3.0.0-2",
     "lodash": "^4.17.4",
     "semver": "^5.3.0",
     "uuid": "^3.0.1"
   },
   "devDependencies": {
+    "chai": "^3.5.0",
     "eslint": "^2.13.1",
     "expect.js": "^0.3.1",
-    "mocha": "^2.5.3",
+    "mocha": "^3.3.0",
     "sinon": "^1.17.7"
   },
   "scripts": {
@@ -52,7 +58,15 @@
       "camelcase": 1,
       "no-unused-vars": 1,
       "no-alert": 1,
-      "no-console": [2, {"allow": ["warn", "error"]}],
+      "no-console": [
+        2,
+        {
+          "allow": [
+            "warn",
+            "error"
+          ]
+        }
+      ],
       "quotes": [
         2,
         "single"

test/test_job.js

@@ -97,7 +97,7 @@ describe('Job', function(){
         });
     });
 
-    it('fails to remove a locked job', function(done) {
+    it('fails to remove a locked job', function() {
       return Job.create(queue, 1, {foo: 'bar'}).then(function(job) {
         return job.takeLock().then(function(lock) {
           expect(lock).to.be.truthy;
@@ -108,7 +108,7 @@ describe('Job', function(){
         }).then(function() {
           throw new Error('Should not be able to remove a locked job');
         }).catch(function(/*err*/) {
-          done();
+          // Good!
         });
       });
     });