Brewing Step

StepController

class core.controller.step_controller.StepController(cbpi)

The Step Controller. This controller is responsible to start and stop the brewing steps.

Undoc-members: Show-inheritance:  

handle_action(action, **kwargs)

Event Handler for “step/action”. It invokes the provided method name on the current step

Parameters:

• action – the method name which will be invoked
• kwargs –

Returns:

None

handle_done(topic, **kwargs)

Event Handler for “step/+/done”. Starts the next step

Parameters:

• topic –
• kwargs –

Returns:

next(**kwargs)

Event Handler for “step/next”. It start the next step

Parameters:kwargs – Returns:None

handle_reset(**kwargs)

Event Handler for “step/reset”. Resets the current step

Parameters:kwargs – Returns:None

handle_start(**kwargs)

Event Handler for “step/start”. It starts the brewing process

Parameters:kwargs – Returns:None

handle_stop(**kwargs)

Event Handler for “step/stop”. Stops the current step

Parameters:kwargs – Returns:None

http_action(request)

HTTP Endpoint to call an action on the current step.

Parameters:request – web requset Returns:web.Response(text=”OK”

http_next(request)

HTTP Endpoint to start the next step. The current step will be stopped

Parameters:request – Returns:

http_reset(request)

HTTP Endpoint to call reset on the current step.

Parameters:request – Returns:

http_start(request)

HTTP Endpoint to start the brewing process.

Parameters:request – Returns:

setup()

Initializer of the the Step Controller. :return:

start()

Start the first step

:return:None

CBPiSimpleStep

class core.api.step.CBPiSimpleStep(*args, **kwargs)

Bases: object

is_dirty()

Check if a managed variable has a new value

Returns:True if at least one managed variable has a new value assigend. Otherwise False

managed_fields = []

next()

Request to stop the the step

Returns:None

reset()

Reset the step. This method needs to be overwritten by the custom step implementation

Returns:None

reset_dirty()

Reset the dirty flag

Returns:

run()

This method in running in the background. It invokes the run_cycle method in the configured interval It checks if a managed variable was modified in the last exection cycle. If yes, the method will persisit the new value of the managed property

Returns:None

run_cycle()

This method is executed in the defined interval. That the place to put your step logic. The method need to be overwritten in the Ccstom step implementaion

Returns:None

running()

Method checks if the step should continue running. The method will return False if the step is requested to stop or the next step should start

Returns:True if the step is running. Otherwise False.

stop()

Request to stop the step

Returns:None

Custom Step

This is an example of a custom step. The Step class need to extend Simple step. In addtion at least the run_cycle method needs to be overwritten

__init__.py

import asyncio

from core.api import Property, action
from core.api.step import CBPiSimpleStep


class CustomStepCBPi(CBPiSimpleStep):

    name = Property.Number(label="Test")

    i = 0
    
    @action(key="name", parameters=None)
    def test(self, **kwargs):
        self.name="WOOHOO"

    async def run_cycle(self):


        #await asyncio.sleep(1)
        self.i = self.i + 1
        self.cbpi.notify(key="step", message="OH YES")
        print("RUN STEP", self.id, self.name, self.__dict__)


def setup(cbpi):
    '''
    This method is called by the server during startup 
    Here you need to register your plugins at the server

    :param cbpi: the cbpi core 
    :return: 
    '''

    cbpi.plugin.register("CustomStepCBPi", CustomStepCBPi)

config.yaml

name: DummyStep
version: 4