loggly.js | |
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/*
* loggly.js: Transport for logginh to remote Loggly API
*
* (C) 2010 Charlie Robbins
* MIT LICENCE
*
*/
var events = require('events'),
loggly = require('loggly'),
util = require('util'),
internal = require('../internal'); | |
function Loggly (options)@options {Object} Options for this instance.Constructor function for the Loggly transport object responsible for persisting log messages and metadata to Loggly; 'LaaS'. | var Loggly = exports.Loggly = function (options) {
events.EventEmitter.call(this);
options = options || {};
if (!options.subdomain) {
throw new Error('Loggly Subdomain is required');
}
if (!options.inputToken && !options.inputName) {
throw new Error('Target input token or name is required.');
}
if (!options.auth && options.inputName) {
throw new Error('Loggly authentication is required');
}
this.name = 'loggly';
this.level = options.level || 'info';
this.logBuffer = [];
this.client = loggly.createClient({
subdomain: options.subdomain,
auth: options.auth || null
});
if (options.inputToken) {
this.inputToken = options.inputToken;
this.ready = true;
}
else if (options.inputName) {
this.ready = false;
this.inputName = options.inputName;
var self = this;
this.client.getInput(this.inputName, function (err, input) {
if (err) {
throw err;
}
self.inputToken = input.input_token;
self.ready = true;
});
}
}; |
Inherit from | util.inherits(Loggly, events.EventEmitter); |
Expose the name of this Transport on the prototype | Loggly.prototype.name = 'loggly'; |
function log (level, msg, [meta], callback)@level {string} Level at which to log the message.@msg {string} Message to log@meta {Object} Optional Additional metadata to attach@callback {function} Continuation to respond to when complete.Core logging method exposed to Winston. Metadata is optional. | Loggly.prototype.log = function (level, msg, meta, callback) {
if (this.silent) {
return callback(null, true);
}
var message = internal.clone(meta);
message.level = level;
message.message = msg;
if (!this.ready) { |
If we haven't gotten the input token yet add this message to the log buffer. | this.logBuffer.push(message);
}
else if (this.ready && this.logBuffer.length > 0) { |
Otherwise if we have buffered messages add this message to the buffer and flush them. | this.logBuffer.push(message);
this.flush();
}
else { |
Otherwise just log the message as normal | this.client.log(this.inputToken, message);
}
callback(null, true);
}; |
function flush ()Flushes any buffered messages to the current | Loggly.prototype.flush = function () {
var self = this,
length = this.logBuffer.length;
|
Close over each message | this.logBuffer.forEach(function (msg) {
self.client.log(self.inputToken, msg, function (err) {
if (err) {
self.emit('error', err);
}
});
});
|
Then quickly truncate the list | this.logBuffer.length = 0;
};
|