Question on connection.handlers

[jayyvis]

Hi Ben Lund,

I am planning to use this library and I am having a question for you. I see that connection.handlers is an array and handlers[0] is used to process the data coming from beanstalkd and it's getting left shifted to bring the next available handler at index 0.

Why do we need to keep multiple handlers at the same time ? Does this mean, we shall issue multiple commands at the same time without waiting for the completion of previous one ?

say for eg.,

var client = require('beanstalk_client').Client;

client.connect('127.0.0.1:11300', function(err, conn) {

  conn.put(0, 0, 1, 'my job1', function(err, job_id) {
    console.log('put job: ' + job_id);
  });

  conn.put(0, 0, 1, 'my job2', function(err, job_id) {
    console.log('put job: ' + job_id);
  });

});

I had executed this code and see it works fine. But wanted to get clarified from you since both the operations are using the single connection at the same time. How does the operations gets synchronized ?

Could you help me out understand this case better ?