node-zk-tenant-election

node-zookeeper-leader-election

This is a simple leader election based on NodeJs and node-zookeeper-client.

v0.0.1 under test

DEBUG=zkelect,testelect node test_elect.js

create a new ZKElect object:

var ZkElect = require('zkelect'); 
var elect = new ZkElect(); 

adding object element for which other node can candidate to:

elect.addElectObject(key, zoo_path, max, function(err, res){ ...} );

elect.getElectObject(key, function(err,res){ ... } );  

elect.delElectObject (key, function(err, res){ ... }); 

elect.getElectObjects (function(err, res){ ... }); 

knowing when we get connected, disconnected

elect.on('connected', function(data){
        debug('connected to %s', data); 
}); 

elect.on('disconnected', function(data){
        debug('disconnected'); 
        debug(data); 
});

candidating to any elements, subject to a maximum number of leading roles

elect.anyCandidate ();

knowing when we get the lead for an element

elect.on('leader-granted', function(data){
        debug("LEADER GRANT EVENT  :: I'm the leader for %j", data); 
}); 

elect.on('leader-released', function(data){
    	debug("LEADER RELEASED EVENT :: Release leader role for %j", data); 
});

other methods:

elect.candidate(key);
elect.assessLeader(key, mypath);
elect.revokeCandidate(key, function(err,res){...});
elect.setMaxTenants(max); 
elect.getMyLeaders(function (err,res){...});
elect.getNumberOfLeads(function(err,res){...});

Further information will be included later