igo / Nlogger
Logging lib for Node.js that prints also module name and line number
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nlogger
nlogger is a Node.js logging library that can
- print messages with module name and current line number so you know from where it was called
- print messages in color
- print parameters in message
- be configured from file
Usage
Use npm or download. Then add to your code:
var logger = require('nlogger').logger(module);
module is object defined automatically by Node.js. If you don't want automatic module names, replace it with your desired string name.
logger.info(message);
logger.info(message, variable, message, variable...);
Examples
var logger = require('nlogger').logger(module);
logger.info('Info message');
logger.debug('Debug message');
logger.warn('Warning message');
logger.error('Error message');
logger.trace('Trace message');
logger.info('Array = ', [1, 2, 3, 4], ', Object = ', {one: 1, two: 2});
Output samples
2015-02-23 20:39:03.570 INFO main:5 - Info message
2015-02-23 20:39:03.588 DEBUG main:6 - Debug message
2015-02-23 20:39:03.589 WARN main:7 - Warning message
2015-02-23 20:39:03.590 ERROR main:8 - Error message
2015-02-23 20:39:03.590 TRACE main:9 - Trace message
2015-02-23 20:39:03.590 INFO main:10 - Array = [ 1, 2, 3, 4 ], Object = { one: 1, two: 2 }
2015-02-23 20:59:12.496 INFO my-modules/first:3 - Message from first module from line #3
2015-02-23 20:59:12.514 INFO my-modules/second:10 - Message from second module from line #10
2015-02-23 20:59:12.515 INFO fake-module-name:3 - Message from third module from line #3
2015-02-23 20:59:12.516 INFO <unknown>:3 - Message from fourth module from line #3
Configuration
nlogger can load optional configuration file nlogger.json which looks like:
{
"color": "auto",
"level": {
"*": "debug",
"my-modules/first": "info"
}
}
-
color
- print message in color? [true, false, "auto"] -
level.*
- default debug level -
level.yourModuleName
- log level for specified module
Possible log levels are trace
, debug
, info
, warn
, error
.
Changes
1.0.0 - Compatibility with latest node.js 0.12.x
0.4.0 - Logging methods parameters changed
0.3.1 - Fixed util dependencies
0.3.0 - Added parameters support to logging methods
0.2.0 - Added configuration file support
0.1.0 - First npm release
License
Commercial license available at http://iostock.com/nlogger
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