node-bunyanでログファイルがかきこまれたらイベントを発火するょーにしてみた logが増ぇた時にView(node-webkitのDOMとか)を更新したぃとかでっかぇる系

emittingBunyanLogEvent.js

var util = require('util');
var _ = require('lodash');
var bunyan = require('bunyan');

function MyRingBuffer(options){
	bunyan.RingBuffer.call(this, arguments)
}
util.inherits(MyRingBuffer, bunyan.RingBuffer);

MyRingBuffer.prototype.write = function(record){
	bunyan.RingBuffer.prototype.write.call(this, arguments);
	this.emit('write', record);
	return true;
};

var ringbuffer = new MyRingBuffer({ limit: 20 });

var log = bunyan.createLogger({
	name: 'foo',
	streams: [
		{
			level: 'info',
			path: 'example.log'
		},
		{
			level: 'info',
			type: 'raw',
			stream: ringbuffer
		}
	]
});

ringbuffer.on('write', function(){
	console.log(arguments);
});

_.delay(function(){
	log.info('hello world');
}, 1000);

_.delay(function(){
	log.info('hello world');
}, 2000);