js面向切面

AOP.JS

Function.prototype.before = function(func) {
	var that = this;
	return function() {
		//debugger
		if(func.apply(this, arguments) === false) {
			return false;
		}
		return that.apply(this, arguments);
	}
}

Function.prototype.after = function(func) {
	var that = this;
	return function() {
		var ret = that.apply(this, arguments);
		if(ret === false) {
			return false;
		}
		func.apply(this, arguments);
		return ret;
	}
}

function logTime (func, funcName) {
	return func = (function() {
		var d;
		return func.before(function() {
			d = +new Date();
		}).after(function() {
			console.log(+new Date() - d, funcName);
		});
	})()
}

function logBefore() {
	if(window.console) {
		window.console.log(1);
	}
}

function logAfter() {
	if(window.console) {
		window.console.log(3);
	}
}


function func(msg) {
	console.info(msg);
}

function func2(msg) {
	var temp = 0
	sleep(1000)
	return temp;
}

function sleep(maxtime) {
	var now = +new Date();
	while(true) {
		if(+new Date() - now > maxtime) {
			break;
		}
	}
}

/*func = func.before(logBefore).after(logAfter);
func(2) //1,2,3*/

/*func2 = logTime(func2, "fuc")
func2()*/