redis_blpop.js

var redis = require('redis');
var cli = redis.createClient();

cli.on('error', function(err) {
        console.log('Err:' + err);
});

function addWorker() {
        console.log('adding worker again');
        cli.blpop('nl', 0, function(err, data) {
                console.log('processing: ' + data[1]);
                setTimeout(function() {
                        addWorker();
                }, 0);
        });
}

addWorker();