Handler used in a sentence

Handler in a sentence as a noun

The Promise pattern is 2 lines of boilerplate code per call, much like an event handler.

It did this by re-hooking the system call table in the rootkit's unload handler.

And what I find is, my programs tend to decompose into handler functions naturally anyways.

With net/http, you end up with a lot of coupling: your end handler needs to know about every layer of middleware above it, and you start losing a lot of the benefit of having middleware in the first place.

For instance, given a giant blob of J2EE web handler code, I can eyeball one handler, recognize the annotation mapping the method to URL syntax, and then punch in a hi-lock regex to light up similar annotations everywhere in the file, then glance through the whole file looking for color patterns.