Reserving a Resource for Several Actions in a Row

Locking groups of actions can be useful if you want to reserve a resource, like a liquid handler, over a set of different actions. This is commonly used to reserve a resource over a load assistant, the run method, and unload, so that other jobs do not attempt to claim the resource.

To set this up in Orchestration Python, there are a few notable concepts:

1. Actor Reference

   Import:

   from artificial.workflows.decorators import actor_reference
   

   Then connect the actor reference to what has been configured in your adapter in config.yaml:

   bravo = actor_reference('bravo', [('bravo', InstrumentActor)], 'Bravo')
   

2. Utilize the actor by reserving it in Orchestration Python.

   Import:

   from artificial.workflows.util import reserve
   

   Then reserve:

   with reserve(bravo, InstrumentActor):
       await LockingAssistants.load()
       await run_bravo_method()
   

Locking Example

from artificial.workflows.decorators import workflow, actor_reference
from artificial.workflows.util import reserve
from stubs.stubs_assistants import LockingAssistants
from stubs.stubs_actions import run_bravo_method, run_i7_method

bravo = actor_reference('bravo', [('bravo', InstrumentActor)], 'Bravo')
i7 = actor_reference('i7', [('i7', InstrumentActor)], 'Beckman Biomek i7')

@workflow('Locking', 'wf_locking', 'lab_c9eae09e-ceed-46d1-8390-87ff7dd8586d')
async def locking() -> None:

   # This locks the bravo resource, over the execution of all three of these actions
   with reserve(bravo, InstrumentActor):
      await LockingAssistants.load()
      await run_bravo_method()
      await LockingAssistants.unload()

   with reserve(i7, InstrumentActor ):
      await LockingAssistants.load()
      await run_i7_method()
      await LockingAssistants.unload()