58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
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class SimpleSchedule {
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private task_is_running: boolean;
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private taskCaller: () => Promise<any>;
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private trackInterval: NodeJS.Timeout | null;
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private checkInterval: number; //default
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constructor(taskFn: () => Promise<any>, checkInterval: number = 5) {
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this.taskCaller = taskFn;
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this.task_is_running = false;
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this.trackInterval = null;
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this.checkInterval = checkInterval;
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}
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start = () => {
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console.log(`Schedule ${this.taskCaller.name} started at ${this.timeNow()}`);
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this.trackInterval = setInterval(async () => {
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// flag for long-running task so another instance wont start
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if(this.task_is_running) {
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console.log(`Task ${this.taskCaller.name} is still running. Check time ${this.timeNow()}`);
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return;
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}
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this.task_is_running = true;
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console.log(`OK invoke ${this.taskCaller.name} at ${this.timeNow()}`);
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await this.taskCaller();
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this.task_is_running = false;
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}, this.checkInterval * 1000 );
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}
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getInterval = (): number => this.checkInterval;
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changeInterval = (new_interval: number) => {
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if(new_interval === this.checkInterval) {
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return; // nothing change!
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}
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// remove running
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if(this.trackInterval) clearInterval(this.trackInterval);
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// set and start
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this.checkInterval = new_interval;
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this.start();
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}
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stop = () => {
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console.log(`Schedule ${this.taskCaller.name} stoped at ${this.timeNow()}`);
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if(this.trackInterval) clearInterval(this.trackInterval);
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}
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timeNow = () => {
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return Math.floor(Date.now() / 1000);
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}
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}
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export default SimpleSchedule;
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