Domain Supervisor

Start co-routines bounded by domains for parallel error handling.

Inspired by Erlang Supervisor and Process classes that enable fault-
tolerant parallel applications by isolating co-routines from each other,
thus preventing exceptions in co-routines from crashing the main nodejs
process.

Installation

npm install domain-supervisor

Usage

var Supervisor = require('domain-supervisor').Supervisor;
var Process = require('domain-supervisor').Process;

var proc = new Process(myCoRoutine);
var supervisor = new Supervisor();

supervisor.run(proc, function(error, restart, crash) {
if (true) {
console.log('Handling error:', error.stack);
console.log('restarting...');
restart();
} else {
// never crash the unix process, but it is an option
crash(error);
}
});

function myCoRoutine() {
var loops = 0;
setInterval(function() {
console.log('valuably crunching data');
if (loops > 5) throw new Error('some terrible exception!');
}, 1000);
}