About
ErrorManager is a very small utility for managing types of Errors in an ExpressJS application.
This is pretty alpha so design may change as I use tweak it in actual real world usage.
Example Usage
It's Coffeescript:
ErrorManager = require "error-manager"
# ====================
# Create a new types of errors usable in the application
# ====================
ErrorManager.create "MyCustomError"
ErrorManager.create "DatabaseBlewUp"
# ====================
# Create a custom express error handling middleware
# ====================
app.use (err, req, res, next) ->
# errors can be checked using instanceof
if ! err instanceof ErrorManager.MyCustomError
return next(err)
res.send "Got MyCustomError"
app.use (err, req, res, next) ->
# errors can also be checked with a is(), which is injected by ErrorManager
# into the Error object's prototype
if err.is(ErrorManager.DatabaseBlewUp) == false
return next(err)
res.send "Oh snap! The DB blew up."
# ... more error handling middle ware
Installation
It is meant to be installed as part of your package.json via NPM. Just
add a "error-manager": "latest" to the dependencies section.