fn-buffer

Make your function buffer calls till you flush.

Useful to make Backtrace logging.

Install

npm install fn-buffer

API

new BufferedFunction(fn, opts)

• fn <function>(required) The function to buffer calls of
• opts [number|object] Options or capacity
• opts.capacity [number=10] Capacity of the ring-buffer of the calls
• opts.flush [number=capacity] Auto-flush when buffer gets full
• opts.reverse [boolean] Reverse the order of buffer calls

Example

import BufferedFunction from 'fn-buffer'

const bufferedLog = new BufferedFunction(console.log);

bufferedLog('a')
bufferedLog('b')
bufferedLog('c')
bufferedLog('d')
bufferedLog('e')
/* Doesn't log anything yet */

bufferedLog.flush();
/* Logs everything at once */

Backtrace logging

This can be used to create backtrace-logging:

import BufferedFunction from 'fn-buffer'

export const debug = new BufferedFunction(console.debug, { flush: 0 })
process.on('uncaughtExceptionMonitor', debug.flush)

This debug function will only log to console in the event of an uncaughtException.

See backtrace-logging for a module that does exactly this.