Semantic Logging for NodeJS.

Strongly typed logging.

Current adapters:

• Console

• Winston

Usage:

Install the library:

npm install cornerstonelabs-semantic-logging --save

Import it:

var semanticLogging = require("cornerstonelabs-semantic-logging");

The interesting class is semanticLogging.SemanticLogger.

You have five decorators/attributes to define the log level:

semanticLogging.debug, semanticLogging.verbose, semanticLogging.info, semanticLogging.warn, semanticLogging.error

This is the bit you need to do:

Subclass SemanticLogger and add functions for each log message.

Decorate the functions with the log level. The following log levels are supported: @debug @verbose @info @warn @error

Example:

var semanticLogging = require("cornerstonelabs-semantic-logging");

var debug = semanticLogging.debug;
var verbose = semanticLogging.verbose;
var info = semanticLogging.info;
var warn = semanticLogging.warn;
var error = semanticLogging.error;

class DoingSomethingLogging extends semanticLogging.SemanticLogger {
    constructor (request) {
        super (request);
    }

    @info
    initialising () {};

    @info
    started () {};

    @error
    startFailed () {};
}


// now let's do some logging:

function startDoingSomething () {
    var logger = new DoingSomethingLogging();
    logger.initialising();

    logger.started();

    if (err) {
        logger.startFailed(err);
    }
}

You can pass any number of parameters into the log function and they will be added to the log message.