zeromq-lpserver

ZeroMQ Reliable Request-Reply Lazy Pirate Pattern - server module

Don't know what this is? See the 0MQ Guide.

Usage

Use in conjunction with Lazy Pirate Client.

Make sure you have 0MQ installed on your machine first (ie. the C libraries). For OS X you can do this:

$ brew install --universal zeromq

On Ubuntu:

$ sudo apt-get -y install libzmq3-dev

Then you should be able to install NPM modules that depend upon the 0MQ libs (like this one).

Lazy Pirate example

lpclient.js (taken from https://github.com/lukebond/zeromq-lpclient/blob/master/example/example.js):

var LPClient = require('../index');

var lpc = new LPClient({url: 'tcp://127.0.0.1:9000', timeout: 2500});

lpc.on('message', function (message) {
  console.log(Date.now() + ' - Got work:', message.toString('utf8'));
  setTimeout(function () {
    lpc.ready();
  }, 100);
});
lpc.ready();

lpserver.js (taken from https://github.com/lukebond/zeromq-lpserver/blob/master/example/example.js):

var LPServer = require('../index');

function workerFn(cb) {
  console.log(Date.now() + ' - Got a request for work');
  return cb(JSON.stringify({lpserver: 'pretending to do work'}));
}

var lps = new LPServer({url: 'tcp://127.0.0.1:9000'}, workerFn);

lps.on('error', function (error) {
  console.log('error', error);
  process.exit(1);
});

Run both of these together in two different terminals and you should get output like this:

$ node lpclient
1406654717202 - Got work: {"lpserver":"pretending to do work"}
1406654717305 - Got work: {"lpserver":"pretending to do work"}
1406654717405 - Got work: {"lpserver":"pretending to do work"}
1406654717507 - Got work: {"lpserver":"pretending to do work"}
1406654717608 - Got work: {"lpserver":"pretending to do work"}
1406654717709 - Got work: {"lpserver":"pretending to do work"}
1406654717810 - Got work: {"lpserver":"pretending to do work"}
1406654717912 - Got work: {"lpserver":"pretending to do work"}
1406654718014 - Got work: {"lpserver":"pretending to do work"}

$ node lpserver
1406654716237 - Got a request for work
1406654717191 - Got a request for work
1406654717305 - Got a request for work
1406654717405 - Got a request for work
1406654717507 - Got a request for work
1406654717607 - Got a request for work
1406654717708 - Got a request for work
1406654717810 - Got a request for work
1406654717912 - Got a request for work
1406654718013 - Got a request for work

Licence

MIT