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Update task.js
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lib/task.js
57
lib/task.js
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@ -5,25 +5,34 @@
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/* // example:
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* // var TASK = require("lib/task");
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* // var taskQueue = TASK.createTaskQueue();
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* // TASK.putTask(queue, TASK.createTask(function() { console.log(a + b + c); sleep(100); }, [1, 2, 3]))
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* // .then(TASK.createTask(function(a, b, c) { console.log(a + b + c); sleep(200); }, [4, 5, 6]))
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* // .then(TASK.createTask(function(a, b, c) { console.log(a + b + c); sleep(300); }, [7, 8, 9]))
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* // TASK.putTask(queue, TASK.createTask(function(task, a, b, c) { console.log(a + b + c); sleep(100); }, [1, 2, 3]))
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* // .then(TASK.createTask(function(task, a, b, c) { console.log(a + b + c); sleep(200); }, [4, 5, 6]))
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* // .then(TASK.createTask(function(task, a, b, c) { console.log(a + b + c); sleep(300); }, [7, 8, 9]))
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* // ;
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* // TASK.putTask(queue, TASK.createTask(function() { console.log(a + b + c); sleep(100); }, [3, 2, 1])
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* // .then(TASK.createTask(function(a, b, c) { console.log(a + b + c); sleep(200); }, [6, 5, 4]))
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* // .then(TASK.createTask(function(a, b, c) { TASK.stop(); console.log(a + b + c); sleep(300); }, [9, 8, 7]))
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* // TASK.putTask(queue, TASK.createTask(function(task, a, b, c) { console.log(a + b + c); sleep(100); }, [3, 2, 1])
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* // .then(TASK.createTask(function(task, a, b, c) { console.log(a + b + c); sleep(200); }, [6, 5, 4]))
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* // .then(TASK.createTask(function(task, a, b, c) { TASK.stop(); console.log(a + b + c); sleep(300); }, [9, 8, 7]))
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* // ;
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* // taskQueue.run();
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*/
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var Task = function(f, params, when) {
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var Task = function(f, params) {
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this.f = f;
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this.params = params;
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this.nextTask = null;
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this.when = (typeof(when) === "number" ? when : 0);
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this.when = 0;
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this.setNextTask = function(task) {
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this.nextTask = task;
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};
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this.setWhen = function(when) {
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this.when = when;
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};
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this.clone = function() {
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var task = new Task(this.f, this.params);
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task.setNextTask(this.nextTask);
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task.setWhen(this.when);
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return task;
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};
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};
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var TaskQueue = function() {
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@ -42,25 +51,21 @@ var TaskQueue = function() {
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};
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this.get = function() {
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var task = null;
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//var now = new Date().getTime();
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//var delta = now;
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var now = new Date();
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try {
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if (this.queue.length > 0) {
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/*
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var k = 0;
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for (var i = 0; i < this.queue.length; i++) {
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var _delta = now - this.queue[i].when;
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if (delta > _delta) {
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k = i;
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delta = _delta;
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}
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}
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task = this.queue[k];
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this.queue = this.queue.splice(k, 1);
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*/
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task = this.queue[0];
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this.queue = this.queue.slice(1);
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if (task.when > 0) {
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var delta = task.when - now.getTime();
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if (delta > 0) {
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var _task = task;
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this.put(_task);
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task = null;
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}
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}
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}
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} catch(e) {
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console.error("TaskQueue.get: " + e.message);
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@ -76,16 +81,16 @@ var TaskQueue = function() {
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if (task != null) {
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try {
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task.params.unshift(task);
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result = task.f.apply(null, task.params);
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if (task.nextTask != null) {
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this.put(task.nextTask);
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}
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} catch (e) {
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console.error("Task exception: " + e.message);
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console.error("task.f: " + typeof(task.f));
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console.error("task.params: " + typeof(task.params));
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}
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if (task.nextTask != null) {
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this.put(task.nextTask);
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}
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}
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} catch(e) {
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console.error("TaskQueue.next: " + e.message);
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