async-queue-processor v1.0.3

async-queue-processor

This package allows to process a queue with the following characteristcs:

• define what criteria you want to use to create you queue
• define how you want to process the queue items
• define how many simultaneous executions you want to allow
• define time to wait before next check when there is no more data to be processed

Installing

async-queue-processor is available on npm. To install it, type:

Using

$ npm install async-queue-processor

then require it in your js script:

var queue = require('async-queue-processor')

Sintax

The sintax to use async-queue-processor is:

queue.initProcess(whatProcess, howProcess, parallelCount, waitTime [, silent])

where the arguments are:

• whatProcess: Async function that returns the content to be processed. Must return a callback(err, content).
• howProcess: Async function that processes the items (one each time) that were provided by the whatProcess. Must return a callback(err).
• parallelCount: Quantity of siimultaneous execution of howProcess.
• waitTime: Seconds to wait a new search for content to be processed when this content is over.
• silent: optional fill it with 1 or true to don't see any log about the process

Examples

var queue = require('async-queue-processor')

function myWhatProcess(callback) {
    // you could be getting data from database or external API
    var items = []
    for(var i=0; i<100; i++) {
        items.push(i);
    }
    callback(null, items || []);
}
function myHowProcess(item, callback) {
    // you could be updating data from database or posting data on an API
    setTimeout(()=> {
        console.log('do something with the item ', item)
        callback(null);
    }, 1000)
}
var parallelCount = 10; // the myHowProcess will be executed ten times simultaneously
var waitTime = 5;
queue.initProcess(myWhatProcess, myHowProcess, parallelCount, waitTime);