Handler Reference¶

Handlers are used to extend the system's functionality by implementing custom functions. They are Python modules with implemented functions. In the system, they are represented as function pointers, such as noc.main.handlers.default_handlers.empty_handler. The actual functions are registered in the system using the import string as a pointer to the function. For example, there is a default handler in the system located at main/handlers/default.py. When called, it prints the passed arguments.

List of Available Handlers¶

Name	Interface	Trigger	Settings
Config Filter	`Allow Config Filter`	Config scan	Managed Object
Config Diff Filter	`Allow Config Diff Filter`	Config scan	Managed Object
Config Validation	`Allow Config Validation`	Config scan	Managed Object
Address Resolver	`Allow Address Resolver`	Discovery scan	Managed Object Profile
Housekeeper	`Allow Housekeeping`	HK scan	Managed Object Profile
DS Filter	`Allow DS Filter`	Datastream scan	DS Filter
Iface Description	`Allow Iface Description`	ifDesc scan	Managed Object Profile

Examples¶

You can check a handler through ./noc shell:

from noc.core.mongo.connection import connect
from noc.core.handler import get_handler

connect()
h = get_handler(<handler_path>)
h()

Dumping Variables¶

This handler prints the provided arguments.

    def empty_handler(*args, **kwargs):
        print("[empty_handler] Arguments", args, kwargs)