Triggers and extensions

Triggers and P4 server extensions allow you to customize parts of P4 Server with user-supplied logic.

	Server Extensions	Triggers
Release	New in 2019.1	Have been a feature of P4 Server for twenty years
Status	Supported as of 2019.1	Remain fully supported
Environment	Part of the P4 product executables. No external dependencies. Written in the Lua programming language. Not platform-specific.	An external program supplied and managed by the P4 administrator.
Starting point for command-line help	command-line: p4 help extension	command-line: p4 help triggers

To learn about and begin using P4 server extensions, see the P4 Extensions Documentation.