Hero scripts of machete.
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/**
* 对爬虫任务列表目录进行监控
* 发现新任务
* 删除已完成的任务文件
* 内存中保存所有任务,及其状态
* 返回当前任务状态
*/
import common from './common.mjs';
import fs from 'node:fs';
import path from 'node:path';
import cron from 'node-cron';
class TaskMoniter {
constructor(task_list_dir) {
this.check_time_gap = 10; //检测间隔时间,单位:秒
this.checking = false;
this.task_dir = task_list_dir; //监控目录:任务列表保存目录
this.tasks = {}; //内存中的任务列表
this.taskStatus = { //当前任务状态
total: 0, //总任务数
waiting: 0, //等待执行的任务数
running: 0, //正在执行的任务数
done: 0, //已完成的任务数
failed: 0 //执行失败的任务数
};
}
async getStatus() {
}
async getNewTask() {
}
async setTaskDone(task) {
}
async setTaskFailed(task) {
}
async checkTasks() {
if (this.checking == true) {
return;
}
try {
this.checking = true;
//do something
console.log('[%s] TaskMoniter auto check...', common.getTimeString());
this.checking = false;
}catch(error) {
this.checking = false;
}
}
run() { //开始监控任务目录,把所有任务缓存到内存
console.log('[%s] TaskMoniter started.', common.getTimeString());
//auto run
const _self = this;
const task_check_time = this.check_time_gap;
const task_auto_run = cron.schedule(`*/${task_check_time} * * * * *`, () => {
_self.checkTasks();
}, {
scheduled: false
});
task_auto_run.start();
console.log('[%s] TaskMoniter auto check started.', common.getTimeString());
}
}
export default TaskMoniter;