repeat-job

This is simple util to run a job repeatedly.

Install

npm install repeat-job

Usage

const RepeatJob = require('repeat-job');

// Create job
const myRepeatJob = new RepeatJob({
    job: function () {
        console.log(`Current time: ${new Date()}`);
    },
    delay: 1000});

// `job` function can be `async`
const myRepeatJob = new RepeatJob({
    job: async () => {
        console.log(`Current time: ${new Date()}`);
    },
    delay: 1000});

// Start job
myRepeatJob.start();

// Stop job
myRepeatJob.stop();

Required parameters

• job: function(cancelToken)

This is your job, can be async. This function accepts optional param cancelToken help you to know when a cancellation is requested.

CancelToken = {
    isCancelRequested: Boolean
}

• delay: delay (ms) between job iterations

Example using CancelToken

Use CancelToken to cancel long running task.

// Use `delay` lib for demonstration
const delay = require('delay');

// Create job with async
const myRepeatJob = new RepeatJob({
    job: async (cancelToken) => {
        console.log('Begin');

        // Simulate long running job
        await delay(1000);

        if (cancelToken.isCancelRequested) {
            console.log('Canceled');
        } else {
            // Simulate long running job
            await delay(1000);
            console.log('End');
        }
    },
    delay: 1000});

// Declare CancelToken
const cancelToken = { isCancelRequested : false };

// Start repeat job, passing CancelToken
myRepeatJob.start(cancelToken);

// Use CancelToken to cancel task
setTimeout(() => {
    cancelToken.isCancelRequested = true;
}, 500);