73 lines
3.0 KiB
Python
73 lines
3.0 KiB
Python
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class CircuitBreakerInterface():
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""" This class provides a common interface to a circuit breaker on an Extron product (extronlib.device). The user can instantiate the class directly or create a subclass to add, remove, or alter behavior for different types of devices.
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Arguments:
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- Host (object) - handle to Extron device class that instantiated this interface class
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- Port (string) - port name (e.g. 'CBR1')
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Parameters:
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- Host - Returns (extronlib.device) - handle to Extron device class that instantiated this interface class
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- Port - Returns (string) - port name
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- State - Returns (string) - current state of the circuit breaker ('Closed', 'Tripped')
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Events:
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- Offline - (Event) Triggers when the device goes offline. The callback takes two arguments. The first one is the extronlib.interface instance triggering the event and the second one is a string ('Offline').
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- Online - (Event) Triggers when the device comes online. The callback takes two arguments. The first one is the extronlib.interface instance triggering the event and the second one is a string ('Online').
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- StateChanged - (Event) Triggers when the circuit breaker state changes. The callback takes two arguments. The first one is the extronlib.interface instance triggering the event, and the second is a string ('Closed' or 'Tripped').
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"""
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Host: object
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"""handle to Extron device class that instantiated this interface class"""
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Port: str
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State: str
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"""current state of the circuit breaker ('Closed', 'Tripped')"""
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Offline = None
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"""
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Event:
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- Triggers when port goes offline
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- The callback takes two arguments. The first one is the extronlib.interface instance triggering the event and the second one is a string ('Offline').
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---
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```
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@event(SomeInterface, ['Online', 'Offline'])
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def HandleConnection(interface, state):
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print('{} is now {}'.format(interface.Port, state))
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```
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"""
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Online = None
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"""
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Event:
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- Triggers when port goes online
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- The callback takes two arguments. The first one is the extronlib.interface instance triggering the event and the second one is a string ('Online').
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"""
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StateChanged = None
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"""
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Event:
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- Triggers when the circuit breaker state changes.
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- The callback takes two arguments. The first one is the extronlib.interface instance triggering the event, and the second is a string ('Closed' or 'Tripped').
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---
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```
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@event(SomeInterface, 'StateChanged')
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def HandleStateChanged(interface, state):
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if state == 'Tripped':
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TrippedAlert()
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```
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"""
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def __init__(self, Host: object, Port: str):
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"""
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CircuitBreaker class constructor.
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Arguments:
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- Host (object) - handle to Extron device class that instantiated this interface class
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- Port (string) - port name (e.g. 'CBR1')
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"""
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...
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