NodeLogger v0.1
The logger works by defining callbacks for a series events, that custom modules can bind to for custom logging needs.
Available events:
"debug"
"notice"
"warning"
"error"
"logged"
"logged" is a generic event triggered every time a log message is added.
Event listeners receive a packet of data:
packet = {
ts: {
year: 2001,
month: "01",
date: "01",
hour: "01",
min: "01",
sec: "01",
object: instace of Date
},
level: "debug"/"notice"/"warning"/"error",
msg: "This is my log message"
}
Out of the box, there is a stdout and a file logger. Both can be used at the same time.
There is also a method to bind an arbitrary list of options, incase your logger needs them. The options are available directly via the event emitter.
Example of usage ("using the logFile module")
require('./src/logFile')
var logger = ('./src/logger')
logger.bindOptions({
filename: "my-logfile.log"
})
function addTwoNumbers(a,b)
{
logger.message("Adding two numbers: " + a + "+" + b + "=" + (a+b));
}
addTwoNumbers(1,1);
addTwoNumbers(40,2);
Example of creating your own log module:
myLogModule.js:
var logger = require('./src/logger');
var sys = require('sys');
logger.bindCallback(function(logListener)
{
logListener.addListener("error",function(packet)
{
sys.puts("[" + packet.level + "] " + packet.msg);
});
});
myProgram.js:
var logger = require('./src/logger');
require('./myLogModule');
function answerToLifeUniverseEverything(argAnwer)
{
if (argAnswer != 42)
{
logger.error("User entered incorrect answer");
return false;
} else {
return true;
}
}
answerToLifeUniverseEverything(10);
answerToLifeUniverseEverything(42);