ways to process errors in node js

handle_the_jandal.js

//test-uncaught-errors
var sys = require('sys')
,	EventEmitter = require('events').EventEmitter;
function error1 (err){
	sys.puts("Handle: " + err);
}
function error2 (err){
	sys.puts("JANDAL: " + err);
}
function exit (){
	sys.puts("exiting ");
}
process.on('exit',exit);

process.on('uncaughtException',error1);
process.on('uncaughtException',error2);

emitter = new EventEmitter();
function passError(err){
	sys.puts("passing error:" + err);
	throw new Error("PASSED:" + err);
}
emitter.on('error',passError);

function emitErr(message){
	process.nextTick(function(){
		emitter.emit('error',Error(message));
	});
}
function throwErr(message){
	process.nextTick(function(){
		throw new Error(message);
	});
}

emitErr("too many parenthesis");
emitErr("unexpected kEND");
	process.nextTick(function(){
		sys.puts('	thrown errors\n');
	});

throwErr("bad magic number");
throwErr("");

function safeError (err){
	sys.puts("saved: " + err);
}

emitter2 = new EventEmitter();
emitter2.on('error',safeError);
emitter2.emit('error',new Error("2nd last: directly emmited 1"));
emitter2.emit('error',new Error("last: directly emmited 2"));
sys.puts('	the nextTick errors won\'t occur\n'
	+	'	until node gets back to the event loop\n'
	+	'	thats why the last errors are first\n')

//if there is no listeners for an error even, node will throw it.
emitter3 = new EventEmitter();
emitter3.emit('error',new Error("catch this"));
//in this case it will still be intercepted by 
//process.on('uncaughtException')
// by error1 and error2.

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