hapi-cron

A Hapi plugin to setup cron jobs that will call predefined server routes at specified times.

Requirements

This plugin is compatible with hapi v17+ and requires Node v8+. If you need a version compatible with hapi v16 please install version 0.0.3.

Installation

Add hapi-cron as a dependency to your project:

$ npm install --save hapi-cron

Usage

const Hapi = require('@hapi/hapi');
const HapiCron = require('hapi-cron');
 
const server = new Hapi.Server();
 
async function allSystemsGo() {
 
    try {
        await server.register({
            plugin: HapiCron,
            options: {
                jobs: [{
                    name: 'testcron',
                    time: '*/10 * * * * *',
                    timezone: 'Europe/London',
                    request: {
                        method: 'GET',
                        url: '/test-url'
                    },
                    onComplete: (res) => {
                        console.log(res); // 'hello world'
                    }
                }]
            }
        });
 
        server.route({
            method: 'GET',
            path: '/test-url',
            handler: function (request, h) {
                return 'hello world'
            }
        });
 
        await server.start();
    }
    catch (err) {
        console.info('there was an error');
    }
}
 
allSystemsGo();

Options

• name - A unique name for the cron job
• time - A valid cron value. See cron configuration
• timezone - A valid timezone
• request - The request object containing the route url path. Other options can also be passed into the request object
  • url - Route path to request
  • method - Request method (defaults to GET) - optional
• onComplete - A synchronous function to run after the route has been requested. The function will contain the result from the request - optional

Cron configuration

This plugin uses the node-cron module to setup the cron job.

Available cron patterns:

Asterisk. E.g. *
Ranges. E.g. 1-3,5
Steps. E.g. */2

Read up on cron patterns here. Note the examples in the link have five fields, and 1 minute as the finest granularity, but the node cron module allows six fields, with 1 second as the finest granularity.

Cron Ranges

When specifying your cron values you'll need to make sure that your values fall within the ranges. For instance, some cron's use a 0-7 range for the day of week where both 0 and 7 represent Sunday. We do not.

• Seconds: 0-59
• Minutes: 0-59
• Hours: 0-23
• Day of Month: 1-31
• Months: 0-11
• Day of Week: 0-6