Is it possible to have a Rolling File Logger and Console Logger at the same time?

[codeowl1]

Hi there,

I am wanting to have a Rolling File Logger on all the time, and then use a command line arg to also turn on Console Logging at the same time. Is this possible and if so how do I configure Simple Node Logger to do this?

Thanks for your time, and a great product.

Regards,

Scott

[darrylwest]

yes, you can add new adapters for file, console, etc. see ./examples/category-logger.js

[codeowl1]

@darrylwest , Thanks for the reply.

I had a look at category-logger.js, I tried the following code:

manager.addAppender(manager.createRollingFileLogger(opts));

But I get the error:

manager.addAppender(manager.createRollingFileLogger(opts));
                            ^

TypeError: manager.createRollingFileLogger is not a function
    at Object.<anonymous> (C:\[path]\TestCategoryLogger.js:19:37)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)
    at startup (node.js:139:18)
    at node.js:974:3

Can you provide an example of exactly how it is spost to work?

Thanks for your time.

[darrylwest]

sorry, I implemented the examples to run from the project root, so for mac/linux you would do this: node examples/category-logger.js
I'm guessing that for windows it would be node examples\category-logger.js but I have no way to test it.

[codeowl1]

@darrylwest Thanks again for the response.

The paths is not the problem. I can run the category script fine without error. I just need to update the require statements as shown below.

But if I modify it to try and use the rolling file logger it fails with the error I mentioned:
manager.addAppender(manager.createRollingFileLogger(opts));

In windows, once the module is installed, I do the require as follows, and this works fine:

var SimpleLogger = require('simple-node-logger'),
      manager = new SimpleLogger();

Here is the full script that generated the error:

var SimpleLogger = require('simple-node-logger'),
      log_manager = new SimpleLogger(),
      opts = {
		logDirectory: 'c:\users\[username]', // Replace with username of logged in user
		fileNamePattern: 'SURPASSClientAssistApp-<DATE>.log',
		dateFormat: 'YYYY.MM.DD'
	},
	log1,
	log2;

log_manager.addAppender(log_manager.createConsoleAppender() );
log_manager.addAppender(log_manager.createRollingFileLogger(opts));

log1 = log_manager.createLogger( 'CategoryOne', 'trace' );
log2 = log_manager.createLogger( 'CategoryTwo', 'trace' );

log1.trace('this is a simple trace log statement (should not show)');
log1.debug('this is a simple debug log statement (should not show)');
log1.info('this is a simple info log statement/entry');
log2.warn('this is a simple warn log statement/entry');
log1.error('this is a simple error log statement/entry');
log2.fatal('this is a simple fatal log statement/entry');

log2.trace('this is a simple trace log statement (should show)');
log1.debug('this is a simple debug log statement (should show)');

var loggers = log_manager.getLoggers();
loggers.forEach(logger => {
	console.log('stats: ', logger.getCategory(), logger.getStats());
});

Thanks again for your time.

[darrylwest]

I see whats happening--what you want to do is create an Appender, not a full logger (that's what the manager is. so, you should be invoking this:

log_manager.addAppender(log_manager.createRollingFileAppender(opts));

-- darryl

[codeowl1]

Cool that solved the problem, thanks very much for sharing the logger and the support!

[codeowl1]

@darrylwest, Actually I now have a new problem.

I have the following script:

var _log_opts = {
	timestampFormat: 'YYYY-MM-DD HH:mm:ss:SSS'
},
_log_manager = new SimpleLogger({ level: 'all' });

_log_manager.addAppender(_log_manager.createConsoleAppender(_log_opts));

var _log = _log_manager.createLogger('TestCat');

_log.info('here is the test');

The problem is that it productions duplicate log entries in the console.

2017-06-19 11:30:07:704 INFO TestCat here is the test
2017-06-19 11:30:07:704 INFO TestCat here is the test

Thanks again for your time.

[codeowl1]

As a follow up I find that if I modify the script to the following I no longer get duplicates:

var _log_opts = {
	timestampFormat: 'YYYY-MM-DD HH:mm:ss:SSS'
},
_log_manager = new SimpleLogger({ level: 'all' });

_log_manager.createConsoleAppender(_log_opts);

var _log = _log_manager.createLogger('TestCat');

_log.info('here is the test');

So just removing this the _log_manager.addAppender( fixed it.

[AshMcConnell]

@codeowl1 Thanks, I had this exact problem. I assumed you'd need to add the appender after creating it. Thanks for following up, much appreciated