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asynchronous task queue using Vue instances to keep the data
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| function newData(options = {}) { | |
| var data = Object.assign({ | |
| sort: 'date+', | |
| }, options, { queue: [] }) | |
| return data; | |
| } | |
| function delay(timeout = 0) { | |
| return new Promise((resolve, reject) => setTimeout(resolve, timeout)); | |
| } | |
| var Task = Vue.extend({ | |
| data: () => Object.assign(newData()), | |
| methods: { | |
| copy(){ return new Task({ data: newData(this.$data) }) }, | |
| newTask(task = {}) { | |
| task.copy = task.copy || this.copy(); | |
| task.id = task.id || ++Task.count; | |
| task.promise = delay(1000) | |
| .then(() => {task.initial = true; return task; }) | |
| .then(this.sendData) | |
| .then(() => {task.sendData = true; return task; }) | |
| .then(this.removeTask) | |
| .catch(() => this.handleError(task)) | |
| return task; | |
| }, | |
| handleError(task) { | |
| task.errorCounter = task.errorCounter || 0; | |
| task.errorCounter++; | |
| if (task.errorCounter < 5) { | |
| console.warn('retry task', task) | |
| this.newTask(task); | |
| } else { | |
| console.error('task errored out', task) | |
| this.removeTask(task) | |
| } | |
| }, | |
| sendData(task) { | |
| return delay(1000).then(() => task) | |
| }, | |
| process() { | |
| this.addTask(this.newTask()) | |
| }, | |
| addTask(task) { | |
| this.queue.push(task); | |
| }, | |
| removeTask(task) { | |
| this.queue = this.queue.filter(item => item != task); | |
| return task; | |
| } | |
| } | |
| }); | |
| Task.count = 0; | |
| var vm = new Task(); | |
| vm.sort = 'test 1'; | |
| vm.process(); | |
| vm.sort = 'test 2'; | |
| vm.process(); | |
| vm.sort = 'test 3'; |
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