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@byaga/journal

v1.0.2

Published

Structured logging utility

Downloads

129

Readme

@byaga/journal

@byaga/journal is a structured logging library for Node.js applications. It may also be useful in a browser but that is untested at this time.

Installation

npm install @byaga/journal

Usage

import Journal from '@byaga/journal';

journal.info('Hello, world!');

withChildSpan

The withChildSpan method is used to create a new child span for a given function. This is useful for tracing the execution of your code and understanding the performance of your application.

import Journal from '@byaga/journal';

const myFunction = () => {
  // Your function logic here
  Journal.annoate({
    'additional': 'metadata'
  })
};

const tracedFunction = Journal.withChildSpan(myFunction, 'my-function');

In this example, myFunction is your function that you want to trace. The withChildSpan method wraps myFunction and returns a new function that, when called, will create a new child log with the name 'my-function' and then call myFunction.

The child span will automatically be ended when myFunction finishes executing. If myFunction is an async function or returns a promise, the child span will be ended when the promise is settled. The child span will contain a duration_ms property with the execution time as well as the parent span having an additional app.timer.my_function_dur_ms property with the execution time.

API

Journal

The Journal class provides structured logging functionality. You can create a new instance of Journal and use it for logging in your application.

Context

The Context module provides a context management system. It can be used to provide 'thread' aware logging without the need to pass the logger in as an input to every async method

Contributing

Contributions are welcome. Please open an issue first to discuss what you would like to change.

License

MIT