Author

Martin Karkowski

Email

m.karkowski@zema.de

This module contains the basics of for logging content.

For a logger please use the following methods.

• defineNopeLogger -> Helper to define Logger, based on given parameters or prevent to create that logger.
• getCentralNopeLogger -> The main Logger (singleton)
• getNopeLogger -> A logger with a given name. Child of the centralLogger

To change the logging behavior use the one of the following funtions:

• enabledFor,
• enableFor,
• shouldLog,

You can convert the logger to an eventEmitter using the function getLogerAsEventEmitter

In the backend (nodejs) you can use the useLogFile method to log the content to a file.

---

Using a Logger:

1. Lets create our logger:

// First lets install nope using npm
const nope = require("../dist-nodejs/index.nodejs");

// Create our Observable:
const logger = nope.getNopeLogger("demo");

Now, that our logger has been created, we are able to log our first messages:

logger.trace("hello from 'trace' level")
logger.debug("hello from 'debug' level")
logger.info("hello from 'info' level")
logger.warn("hello from 'warn' level")
logger.error("hello from 'error' level")

   2023-03-28T15:50:49.827Z - DEBUG - demo : hello from 'debug' level
   2023-03-28T15:50:49.827Z - INFO  - demo : hello from 'info' level


   2023-03-28T15:50:49.827Z - WARN  - demo : hello from 'warn' level
   2023-03-28T15:50:49.827Z - ERROR - demo : hello from 'error' level

To change the logging level use the property level:

logger.setLevel(nope.WARN);

logger.trace("hello from 'trace' level")
logger.debug("hello from 'debug' level")
logger.info("hello from 'info' level")
logger.warn("hello from 'warn' level")
logger.error("hello from 'error' level")

   2023-03-28T15:52:36.027Z - WARN  - demo : hello from 'warn' level
   2023-03-28T15:52:36.027Z - ERROR - demo : hello from 'error' level

As you can see you are able to change the log level.