diff --git a/.travis.yml b/.travis.yml index b387795..45e0836 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,5 +1,5 @@ language: node_js node_js: - - "4" + - "12" services: - redis-server diff --git a/lib/QuerySwarm.js b/lib/QuerySwarm.js index 103d421..6fd8a74 100644 --- a/lib/QuerySwarm.js +++ b/lib/QuerySwarm.js @@ -30,15 +30,15 @@ module.exports = function(redis) { // workers are currently active self.active = false; + // whether or not QuerySwarm is populating the queue + self.populating = false; + // the user-provided query that fetches tasks self.query = query; // the worker that processes a task self.worker = worker; - // the unix timestamp when a query was last run - self.throttle = 0; - // the Worker objects that consume the queue self.workers = []; @@ -49,7 +49,7 @@ module.exports = function(redis) { throttle: typeof options.throttle === 'number' ? options.throttle : 10000, // queue length at which to trigger another query threshold: typeof options.threshold === 'number' ? options.threshold : 10, - // the duration a worker waits between between polling an empty queue + // the duration a worker waits between polling an empty queue retryDelay: typeof options.retryDelay === 'number' ? options.retryDelay : 500, // the max duration a query can run before we try again lockTimeout: typeof options.lockTimeout === 'number' ? options.lockTimeout : 20000, @@ -58,9 +58,11 @@ module.exports = function(redis) { // maximum concurrent workers per process get concurrency() { return concurrency; }, set concurrency(value) { + // FIXME if this delete's workers, it would need to also stop them, which is an async operation var params = [0, Math.max(0, self.workers.length - value)]; + let i = 0; while(params.length - 2 < value - self.workers.length) { - var worker = new Worker(self); + var worker = new Worker(self, ++i); if(self.active) worker.start(); params.push(worker); } @@ -77,7 +79,7 @@ module.exports = function(redis) { self.redlock.on('clientError', function(err) { self.emit('clientError', err); }); - } + }; util.inherits(QuerySwarm, EventEmitter); @@ -89,6 +91,7 @@ module.exports = function(redis) { }); self.active = true; + self.emit('started'); return self; }; @@ -99,6 +102,7 @@ module.exports = function(redis) { worker.stop(callback); }, function(err, res) { if(!err) self.active = false; + self.emit('stopped', err, res); if(callback instanceof Function) callback(err, res); }); @@ -107,95 +111,199 @@ module.exports = function(redis) { QuerySwarm.prototype.destroy = function(callback) { var self = this; - self.stop(function(){ + self.stop(function(err, res){ // TODO: get the lock, cursor, queue, processing, & deadletter; write to file??? emit??? log??? - redis.del(self.id + ':lock', self.id + ':throttle', self.id + ':cursor', self.id + ':queue', self.id + ':processing', self.id + ':deadletter', callback); + redis.del(self.id + ':lock', self.id + ':throttle', self.id + ':cursor', self.id + ':queue', self.id + ':processing', self.id + ':deadletter', (err2) => { + callback(err2); + self.emit('destroyed', err, res); + }); }); return self; }; + QuerySwarm.prototype.getCursor = function(callback) { + return redis.get(this.id + ':cursor', function(err, cursor) { + return callback(err, JSON.parse(cursor)); + }); + }; + + QuerySwarm.prototype.setCursor = function(value, callback) { + if (self.populating) return callback(new Error('Cannot update cursor of swarm while it is populating. The new cursor will be overwritten by the worker before a new query is run.')); + return self.redlock.lock(self.id + ':lock', 1000, function(err, lock) { + if (err) return callback(err); + return redis.set(this.id + ':cursor', value, function(err) { + lock.unlock(); + return callback(err); + }); + }); + }; + + QuerySwarm.prototype.getThrottle = function(callback) { + return redis.pttl(this.id + ':throttle', function(err, pttl) { + return callback(err, Date.now() + Math.max(pttl,0)); + }); + }; + + QuerySwarm.prototype.getQueue = function(callback) { + return redis.lrange(this.id + ':queue', 0, -1, function(err, queue) { + return callback(err, queue.map(function(q){ return JSON.parse(q); })); + }); + }; + + QuerySwarm.prototype.getQueueLength = function(callback) { + return redis.llen(this.id + ':queue', function(err, llen) { + return callback(err, llen); + }); + }; + + QuerySwarm.prototype.getProcessing = function(callback) { + return redis.lrange(this.id + ':processing', 0, -1, function(err, processing) { + return callback(err, processing.map(function(q){ return JSON.parse(q); })); + }); + }; + + QuerySwarm.prototype.getProcessingLength = function(callback) { + return redis.llen(this.id + ':processing', function(err, llen) { + return callback(err, llen); + }); + }; + + QuerySwarm.prototype.getDeadletter = function(callback) { + return redis.lrange(this.id + ':deadletter', 0, -1, function(err, deadletter) { + return callback(err, deadletter.map(function(q){ return JSON.parse(q); })); + }); + }; + + QuerySwarm.prototype.getDeadletterLength = function(callback) { + return redis.llen(this.id + ':deadletter', function(err, llen) { + return callback(err, llen); + }); + }; + + QuerySwarm.prototype.getStatus = function(callback) { + var self = this; + return redis.multi() + .llen(this.id + ':processing') + .llen(this.id + ':queue') + .llen(this.id + ':deadletter') + .pttl(this.id + ':throttle') + .get(this.id + ':cursor') + .execute(function(err, res) { + if (err) return callback(err); + return callback(null, { + active: self.active, + populating: self.populating, + processing: res[0], + queued: res[1], + deadlettered: res[2], + throttle: res[3], + cursor: res[4], + workers: self.workers.map(function(worker) { + return { + id: worker.id, + active: worker.active, + stopping: worker.stopping, + job: worker.job, + }; + }), + }); + }); + }; + QuerySwarm.prototype.populate = function() { var self = this; // throttle the frequency of populate calls - if(self.active === true && self.throttle > Date.now()) - return; - - self.throttle = Date.now() + self.options.throttle; + return self.getThrottle(function(err, throttle) { + if (err) + return; - // defer to the next tick - setImmediate(function(){ - if(self.active !== true) + if(self.active === true && throttle > Date.now()) return; - // acquire a redis lock - self.redlock.lock(self.id + ':lock', self.options.lockTimeout, function(err, lock) { - if(err || !lock) + // defer to the next tick + return setImmediate(function(){ + if(self.active !== true) return; - // acquire the distributed throttle - self.redlock.lock(self.id + ':throttle', self.options.throttle, function(err, throttle) { - if(err || !throttle) { - lock.unlock(); + // acquire a redis lock + return self.redlock.lock(self.id + ':lock', self.options.lockTimeout, function(err, lock) { + if(err || !lock) return; - } - // get the cursor - redis.get(self.id + ':cursor', function(err, cursor) { - if(err) { + // acquire the distributed throttle + return self.redlock.lock(self.id + ':throttle', self.options.throttle, function(err, throttle) { + if(err || !throttle) { lock.unlock(); - return self.emit('error', err, 'error getting cursor'); + return; } - cursor = JSON.parse(cursor); + self.throttle = Date.now() + self.options.throttle; - // run the user-provided query - self.query(cursor, function(err, cursor, contents) { + // get the cursor + return self.getCursor(function(err, cursor) { if(err) { lock.unlock(); - return self.emit('error', err, 'error running the user-provided query'); + return self.emit('error', err, 'error getting cursor'); } - var tasks = (Array.isArray(contents) && contents.length > 0) ? contents.map(JSON.stringify) : []; + self.populating = true; - // VERY BAD: we've exceeded our lock timeout - if(Date.now() >= lock.expiration) - return self.emit('error', new OrphanedQuery(cursor, tasks)); + // run the user-provided query + return self.query(cursor, function(err, cursor, contents) { - // TODO: extend the lock if its expiration has fallen below a configurable buffer + if(err) { + self.populating = false; + lock.unlock(); + return self.emit('error', err, 'error running the user-provided query'); + } - var multi = redis.multi(); + var tasks = (Array.isArray(contents) && contents.length > 0) ? contents.map(JSON.stringify) : []; - // update the redis cursor - multi = multi.set(self.id + ':cursor', JSON.stringify(cursor)); + // VERY BAD: we've exceeded our lock timeout + if(Date.now() >= lock.expiration){ + self.populating = false; + return self.emit('error', new OrphanedQuery(cursor, tasks)); + } - // add tasks to redis queue - if(tasks.length > 0) { - var params = tasks.slice(); - while (params.length > 0) { - var args = params.splice(0,10000) - args.unshift(self.id + ':queue'); - multi = multi.lpush.apply(multi, args); + // TODO: extend the lock if its expiration has fallen below a configurable buffer + + var multi = redis.multi(); + + // update the redis cursor + multi = multi.set(self.id + ':cursor', JSON.stringify(cursor)); + + // add tasks to redis queue + if(tasks.length > 0) { + var params = tasks.slice(); + while (params.length > 0) { + var args = params.splice(0,10000) + args.unshift(self.id + ':queue'); + multi = multi.lpush.apply(multi, args); + } } - } - multi.exec(function(err) { + return multi.exec(function(err) { - // release the lock - lock.unlock(); + // We are done populating and the cursor has been updated + self.populating = false; + + // release the lock + lock.unlock(); - // TODO: this *could* be a bad place to have an error for different reasons - // we need to check which command threw and act accordingly: - // 0. new OrphanedQuery(cursor, tasks) // maybe emergency (depends on query) - // 1. new OrphanedTasks(cursor, tasks) // definitely emergency, we have updated the cursor without pushing its tasks to the queue - // 2. deadlock; will fix itself + // TODO: this *could* be a bad place to have an error for different reasons + // we need to check which command threw and act accordingly: + // 0. new OrphanedQuery(cursor, tasks) // maybe emergency (depends on query) + // 1. new OrphanedTasks(cursor, tasks) // definitely emergency, we have updated the cursor without pushing its tasks to the queue + // 2. deadlock; will fix itself - if(err) - return self.emit('error', err, 'error populating queue'); + if(err) + return self.emit('error', err, 'error populating queue'); - self.emit('populate', cursor, tasks); + self.emit('populate', cursor, tasks); + }); }); }); }); diff --git a/lib/Worker.js b/lib/Worker.js index 5f400d9..6173656 100644 --- a/lib/Worker.js +++ b/lib/Worker.js @@ -1,6 +1,8 @@ 'use strict'; var util = require('util'); +var EventEmitter = require('events').EventEmitter; +var assert = require('assert'); function DeadletterError(task) { this.name = 'DeadletterError'; @@ -10,7 +12,6 @@ function DeadletterError(task) { util.inherits(DeadletterError, Error); - function AcknowledgeError(task) { this.name = 'AcknowledgeError'; this.message = 'Unable to acknowledge task. Retrying.'; @@ -19,7 +20,6 @@ function AcknowledgeError(task) { util.inherits(AcknowledgeError, Error); - function RequeueError(task) { this.name = 'RequeueError'; this.message = 'Unable to requeue task. Retrying.'; @@ -28,20 +28,32 @@ function RequeueError(task) { util.inherits(RequeueError, Error); - module.exports = function(redis) { - function Worker(master){ + function Worker(master, id){ this.master = master; + // id of this worker + this.id = id; + // this worker is either processing a task or waiting for one this.active = false; - // null || setTimeoutObject from waiting job + // null || setTimeout reference from waiting job this.immediate = null; + + // null || setImmediate reference from waiting job this.timeout = null; + + // null || info about the status of the worker + this.job = null; + + // whether or not the worker is in the process of stopping + this.stopping = false; } + util.inherits(Worker, EventEmitter); + Worker.prototype.start = function(){ var self = this; @@ -49,70 +61,110 @@ module.exports = function(redis) { if(self.active) return; + // what if we are currently stopping? + if (self.stopping) return self.once('stopped', function() { + delete self.next; + self.active = true; + self.stopping = false; + self.next('consume'); + }); + delete self.next; self.active = true; + self.stopping = false; self.next('consume'); }; Worker.prototype.stop = function(callback){ var self = this; - // make sure we aren't already stopped or stopping - if(!self.active || self.next !== Worker.prototype.next) + // we're already stopped + if(!self.active) { return callback(); + } + + // we're already stopping + if(self.stopping) { + return self.once('stopped', callback); + } // if we have a timeout or immediate set, just clear it and return - if(self.timeout !== null || self.immediate !== null){ - clearImmediate(self.immediate); - clearTimeout(self.timeout); - self.immediate = null; - self.timeout = null; + // this means the worker is doing nothing at the moment + if(self.hasTimeout()){ + self.clearTimeouts(); self.active = false; + self.emit('stopped', self.id); return callback(); } + self.stopping = true; + // we're mid-job; gracefully exit when it's done return (self.next = function(){ delete self.next; self.active = false; - callback(); + self.stopping = false; + self.emit('stopped', self.id); + return callback(); }); }; - Worker.prototype.destroy = function(callback){ + Worker.prototype.next = function(method, delay, ...args){ var self = this; - self.stop(function(){ - // TODO: destroy redis keys and emit their values - callback(); - }); - }; - Worker.prototype.next = function(method, delay){ - var self = this; + assert.ok(self.active, 'Worker is not active'); - // we're done with the timeout, so remove it - clearImmediate(self.immediate); - clearTimeout(self.timeout); - self.immediate = null; - self.timeout = null; + self._current = null; - // this should never actually happen - if(self.active === false) - return; + if(delay === false) { + // we're done with the timeout, so remove it + self.clearTimeouts(); + return self[method].apply(self, args); + } + + assert.equal(self.hasTimeout(), false, 'Worker already has timeout set'); + assert.ok(typeof self[method] === 'function', 'Worker['+method+'] is not a function'); - if(delay === false) - return self[method](); + self.job = { + method: method, + args: args, + status: 'waiting', + scheduled: delay ? Date.now() + delay : Date.now(), + }; if(delay) - return (self.timeout = setTimeout(self.next.bind(self), delay, method)); + return (self.timeout = setTimeout(self.next.bind(self), delay, method, false, ...args)); - return (self.immediate = setImmediate(self.next.bind(self), method, false)); + return (self.immediate = setImmediate(self.next.bind(self), method, false, ...args)); + }; + + Worker.prototype.hasTimeout = function() { + var self = this; + return self.timeout !== null || self.immediate !== null; + }; + + Worker.prototype.clearTimeouts = function() { + var self = this; + + if (self.hasTimeout()) { + clearImmediate(self.immediate); + clearTimeout(self.timeout); + self.immediate = null; + self.timeout = null; + self.job = null; + } }; Worker.prototype.consume = function(){ var self = this; - redis.multi() + self.job = { + method: 'consume', + started: Date.now(), + status: 'Getting task', + }; + + return redis.multi() // get a task from the queue .rpoplpush(self.master.id + ':queue', self.master.id + ':processing') @@ -121,6 +173,7 @@ module.exports = function(redis) { .llen(self.master.id + ':queue') .exec(function(err, replies){ + if(err) { self.master.emit('error', err, 'error consuming queue'); return self.next('consume', self.master.options.retryDelay); @@ -136,8 +189,11 @@ module.exports = function(redis) { if(task === null) return self.next('consume', self.master.options.retryDelay); + self.job.status = 'Running user-provided worker'; + self.job.task = JSON.parse(task); + // run the user-provided worker - self.master.worker(JSON.parse(task), function(err, result, forceDeadletter){ + return self.master.worker(JSON.parse(task), function(err, result, forceDeadletter){ if(err) { self.master.emit('error', err, 'error running the user-provided worker'); @@ -156,6 +212,12 @@ module.exports = function(redis) { Worker.prototype.deadletter = function(task){ var self = this; + self.job = { + method: 'deadletter', + started: Date.now(), + status: 'Sending task to deadletter', + }; + redis.multi() // add to the deadletter list .lpush(self.master.id + ':deadletter', task) @@ -175,7 +237,8 @@ module.exports = function(redis) { self.master.emit('error', new DeadletterError(task)); // save a reference to this timer somewhere so it can be cleared on stop? - setTimeout(self.deadletter.bind(self), self.master.options.retryDelay, task); + // return self.timeout = setTimeout(self.deadletter.bind(self), self.master.options.retryDelay, task); + return self.next('deadletter', self.master.options.retryDelay, task); } self.master.emit('deadletter', task); @@ -186,6 +249,12 @@ module.exports = function(redis) { Worker.prototype.acknowledge = function(task){ var self = this; + self.job = { + method: 'acknowledge', + started: Date.now(), + status: 'Marking task as complete', + }; + // remove from processing list redis.multi() // remove from processing list @@ -200,7 +269,8 @@ module.exports = function(redis) { self.master.emit('error', new AcknowledgeError(task)); // save a reference to this timer somewhere so it can be cleared on stop? - setTimeout(self.acknowledge.bind(self), self.master.options.retryDelay, task); + // return self.timeout = setTimeout(self.acknowledge.bind(self), self.master.options.retryDelay, task); + return self.next('acknowledge', self.master.options.retryDelay, task); } self.master.emit('acknowledge', task); @@ -211,12 +281,19 @@ module.exports = function(redis) { Worker.prototype.requeue = function(task){ var self = this; + self.job = { + method: 'requeue', + started: Date.now(), + status: 'Sending task back to queue', + }; + redis.zscore(self.master.id + ':retries', task, function(err, score) { if (err) { self.master.emit('error', err, 'error requeueing task'); self.master.emit('error', new RequeueError(task)); // save a reference to this timer somewhere so it can be cleared on stop? - return setTimeout(self.requeue.bind(self), self.master.options.retryDelay, task); + // return self.timeout = setTimeout(self.requeue.bind(self), self.master.options.retryDelay, task); + return self.next('requeue', self.master.options.retryDelay, task); } if (score >= self.master.options.maxProcessingRetries) { @@ -233,7 +310,8 @@ module.exports = function(redis) { self.master.emit('error', err, 'error requeueing task'); self.master.emit('error', new RequeueError(task)); // save a reference to this timer somewhere so it can be cleared on stop? - return setTimeout(self.requeue.bind(self), self.master.options.retryDelay, task); + // return self.timeout = setTimeout(self.requeue.bind(self), self.master.options.retryDelay, task); + return self.next('requeue', self.master.options.retryDelay, task); } self.master.emit('requeue', task); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..f0aaf2f --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1992 @@ +{ + "name": "query-swarm", + "version": "0.3.0", + "lockfileVersion": 2, + "requires": true, + "packages": { + "": 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["schedule", "queue", "task", "job", "worker", "redis", "distributed", "async"], "author": "Mike Marcacci ", "contributors": [ { "name": "Mike Marcacci", "email": "mike.marcacci@gmail.com" + }, + { + "name": "Nick Carenza", + "email": "nickcarenza@gmail.com" } ], "main": "lib/QuerySwarm.js", @@ -27,12 +31,15 @@ }, "license": "MIT", "dependencies": { - "async": "^1.4.2", - "redis": "^0.12.1", - "redlock": "^1.0.1" + "async": "^3.2.3", + "redis": "^4.0.6", + "redlock": "^4.2.0" }, "devDependencies": { - "chai": "^3.0.0", - "mocha": "^2.0.1" + "chai": "^4.3.6", + "mocha": "^9.2.2" + }, + "engines": { + "node": ">=16" } } diff --git a/test/index.js b/test/index.js index 9c1efd2..1adf347 100644 --- a/test/index.js +++ b/test/index.js @@ -1,8 +1,11 @@ 'use strict'; var assert = require('chai').assert; -var redis = require('redis').createClient(); +var redis = require('redis').createClient({ + legacyMode: true, +}); var QuerySwarm = require('../lib/QuerySwarm.js')(redis); +var async = require('async'); var db = []; for (var i = 0, l = 100; i < l; i++) { @@ -22,6 +25,14 @@ after(function(done) { redis.del('QuerySwarm:test:cursor', done); }); +before(async function() { + return await redis.connect(); +}); + +after(async function () { + return await redis.disconnect(); +}); + before(function(done) { redis.scan('0',function(err, results) { if (err) return done(err); @@ -33,26 +44,38 @@ before(function(done) { describe('Start/Stop', function(){ var q = 0; var w = 0; + var l = 15; var swarm = new QuerySwarm( 'QuerySwarm:test', function(cursor, callback) { q++; cursor = cursor || 0; var res = []; - for (var i = 0, l = 15; i < l; i++) { + for (var i = 0; i < l; i++) { res.push(cursor + i); } - callback(null, cursor+15, res); + callback(null, cursor+l, res); }, function(task, callback) { w++; // stop on 10, 20, 30... - if(w % 10 === 0) swarm.stop(); + // FIXME sometimes w==11 get's passed this point + // NOTE ^ That happens because QuerySwarm might start the next task before the workers get stopped + if(w % 10 === 0) { + swarm.stop((err) => { + if (err) console.error(err) + }); + return callback(null, {}); + } callback(null, {}); }, - opts + { ...opts, + throttle: 1000, + } ); + swarm.on('error', console.error); + it('should not start when created', function(done){ setTimeout(function(){ assert.equal(q, 0); @@ -73,9 +96,8 @@ describe('Start/Stop', function(){ }); it('should start and stop when commanded', function(done){ - swarm.start(); - setTimeout(function(){ - + this.timeout(10000); + swarm.once('stopped',function(){ // the swarm should query once assert.equal(q, 1); @@ -84,12 +106,13 @@ describe('Start/Stop', function(){ assert.isAbove(w, 9); assert.isBelow(w, 12); done(); - }, 500); + }); + swarm.start(); }); it('should start and stop when commanded', function(done){ - swarm.start(); - setTimeout(function(){ + this.timeout(10000); + swarm.once('stopped',function(){ // the swarm should query one more time assert.equal(q, 2); @@ -99,7 +122,8 @@ describe('Start/Stop', function(){ assert.isAbove(w, 19); assert.isBelow(w, 22); done(); - }, 500); + }); + swarm.start(); }); it('should not move successful tasks to the deadletter list', function(done){ @@ -121,7 +145,7 @@ describe('Start/Stop', function(){ it('should leave unprocessed tasks in the queue', function(done){ redis.llen('QuerySwarm:test:queue', function(err, res){ if(err) return done(err); - assert.equal(res, q * 15 - w); + assert.equal(res, q * l - w); done(); }); }); @@ -129,15 +153,47 @@ describe('Start/Stop', function(){ it('should leave the cursor in the correct place', function(done){ redis.get('QuerySwarm:test:cursor', function(err, res){ if(err) return done(err); - assert.equal(JSON.parse(res), q * 15); + assert.equal(JSON.parse(res), q * l); done(); }); }); + + it('should callback to overlapping calls to destroy', function(done){ + // this should take just over 1 second to compelete + this.timeout(1100); + // TODO fail the test if it took less than 1 second + + var swarm = new QuerySwarm( + 'QuerySwarm:test:'+this.test.fullTitle(), + function(cursor, callback) {}, + function(task, callback) {}, + opts + ); + swarm.workers.forEach(function(worker) { + worker.active = true; + worker.sleep = function(ms) { + setTimeout(function(){ + worker.next('consume'); + }, ms); + }; + worker.next('sleep', false, 1000); + }); + async.parallel([ + function(cb) { swarm.destroy(function(err){ + if(err) return cb(err); + cb(); + }); }, + function(cb) { swarm.destroy(function(err){ + if(err) return cb(err); + cb(); + }); }, + ], done); + }); }); describe('Deadletter', function(){ - var q = 0; var w = 0; + var q = 0; var errs = 0; var swarm = new QuerySwarm( @@ -145,13 +201,17 @@ describe('Deadletter', function(){ function(cursor, callback) { q++; cursor = cursor || 0; - callback(null, cursor+15, [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]); + // should return 15 elements twice + callback(null, cursor+1, cursor <=1 ? [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1] : []); }, function(task, callback) { w++; // stop on 20, 40, 60... - if(w % 20 === 0) swarm.stop(); + if(w % 20 === 0) { + swarm.stop(() => {}); + return callback(null, {}); + } // deadletter 5, 15, 25... if((w+5) % 10 === 0) @@ -159,9 +219,17 @@ describe('Deadletter', function(){ callback(null, {}); }, - opts + { + throttle: 100, + threshold: 4, + retryDelay: 50, + lockTimeout: 200, + concurrency: 2 + } ); + after('destroy', swarm.destroy.bind(swarm)); + // increment the # of errors swarm.on('error', function(err, msg){errs++;}); @@ -169,12 +237,16 @@ describe('Deadletter', function(){ swarm.destroy(function(err){ if(err) return done(err); swarm.start(); - setTimeout(function(){ - assert.equal(errs, 2); - assert.equal(q, 2); - assert.ok(w > 19 && w < 22); // can be 20 or 21, because we have 2 workers - done(); - }, 100); + setTimeout(() => { + + assert.equal(errs, 2, 'errors'); + + // and consume the next 10 jobs before issuing a stop command; + assert.isAbove(w, 19); + assert.isBelow(w, 22); + + swarm.stop(done); + }, 1000); }); }); @@ -197,7 +269,7 @@ describe('Deadletter', function(){ it('should leave unprocessed tasks in the queue', function(done){ redis.llen('QuerySwarm:test:queue', function(err, res){ if(err) return done(err); - assert.equal(res, q * 15 - w); + assert.equal(res, 30 - w); done(); }); }); @@ -205,7 +277,7 @@ describe('Deadletter', function(){ it('should leave the cursor in the correct place', function(done){ redis.get('QuerySwarm:test:cursor', function(err, res){ if(err) return done(err); - assert.equal(JSON.parse(res), q * 15); + assert.equal(JSON.parse(res), q); done(); }); }); @@ -231,7 +303,7 @@ describe('Requeue', function(){ }, function(task, callback) { w++; - callback(new Error('test')) + callback(new Error('test')); }, { throttle: 10, @@ -252,7 +324,7 @@ describe('Requeue', function(){ swarm.on('deadletter', function(task) { d++; assert.equal(task, 1); - }) + }); swarm.start(); setTimeout(function(){ swarm.destroy(function(){ @@ -264,7 +336,7 @@ describe('Requeue', function(){ }); },500) }); - it('should requeue up to maxProcessingRetries unless the worker specifies force_deadletter', function(done) { + it('should requeue up to maxProcessingRetries unless the worker specifies forceDeadletter', function(done) { var r = 0; var d = 0; var e = 0; @@ -283,7 +355,7 @@ describe('Requeue', function(){ }, function(task, callback) { w++; - callback(new Error('test'), null, true) + callback(new Error('test'), null, true); }, { throttle: 10, @@ -384,6 +456,7 @@ describe('Events', function(){ 'QuerySwarm:test', function(cursor, callback) { queryCount++; + if (!cursor) cursor = 0; var newCursor = Math.min(db.length, cursor+10); callback(null, newCursor, db.slice(cursor, newCursor)); }, @@ -448,3 +521,25 @@ describe('Populate', function() { }); }); }); + +// describe('Non-graceful shutdown recovery', function() { +// it('should recover items from processing', function(done) { +// var swarm = new QuerySwarm( +// 'QuerySwarm:test:'+this.test.fullTitle(), +// function(cursor, callback) { +// callback(null, null, new Array(1000000)); +// swarm.stop(); +// }, +// function(task, callback) { +// workerCount++; +// dump.push(task); +// if(dump.length == db.length) { +// assert.sameMembers(dump, db); +// swarm.stop(done); +// } +// setTimeout(callback, 10, null, dump.length); +// }, +// opts +// ); +// }); +// }); \ No newline at end of file