from typing import List, Union, Optional, Type
from tardis.agents.batchsystemagent import BatchSystemAgent
from tardis.agents.siteagent import SiteAgent
from tardis.interfaces.plugin import Plugin
from tardis.interfaces.state import State
from .dronestates import RequestState
from .dronestates import DownState
from ..plugins.sqliteregistry import SqliteRegistry
from ..utilities.attributedict import AttributeDict
from ..utilities.utils import load_states
from cobald.daemon import service
from cobald.interfaces import Pool
from backports.cached_property import cached_property
from datetime import datetime
import asyncio
import logging
import uuid
logger = logging.getLogger("cobald.runtime.tardis.resources.drone")
[docs]@service(flavour=asyncio)
class Drone(Pool):
def __init__(
self,
site_agent: SiteAgent,
batch_system_agent: BatchSystemAgent,
plugins: Optional[List[Plugin]] = None,
remote_resource_uuid=None,
drone_uuid=None,
state: Optional[State] = None,
created: float = None,
updated: float = None,
):
self._site_agent = site_agent
self._batch_system_agent = batch_system_agent
self._plugins = plugins or []
self._state = state
self.resource_attributes = AttributeDict(
site_name=self._site_agent.site_name,
machine_type=self.site_agent.machine_type,
obs_machine_meta_data_translation_mapping=self.batch_system_agent.machine_meta_data_translation_mapping, # noqa B950
remote_resource_uuid=remote_resource_uuid,
created=created or datetime.now(),
updated=updated or datetime.now(),
drone_uuid=drone_uuid or self.site_agent.drone_uuid(uuid.uuid4().hex[:10]),
)
self._allocation = 0.0
self._demand = self.maximum_demand
self._utilisation = 0.0
self._supply = 0.0
@property
def allocation(self) -> float:
return self._allocation
@property
def batch_system_agent(self) -> BatchSystemAgent:
return self._batch_system_agent
@cached_property
def _database(self) -> Optional[SqliteRegistry]:
for plugin in self._plugins:
if isinstance(plugin, SqliteRegistry):
return plugin
[docs] async def database_state(self) -> Optional[Type[State]]:
try:
return load_states(
await self._database.get_resource_state(
self.resource_attributes.drone_uuid
)
)[0]["state"]
except (IndexError, AttributeError):
return None
@property
def demand(self) -> float:
return self._demand
@demand.setter
def demand(self, value: float):
self._demand = value
@property
def heartbeat_interval(self) -> int:
return self.site_agent.drone_heartbeat_interval
@property
def minimum_lifetime(self) -> [int, None]:
return self.site_agent.drone_minimum_lifetime
@property
def maximum_demand(self) -> float:
return self.site_agent.machine_meta_data["Cores"]
@property
def supply(self) -> float:
return self._supply
@property
def utilisation(self) -> float:
return self._utilisation
@property
def site_agent(self) -> SiteAgent:
return self._site_agent
[docs] async def run(self):
if self.state is None:
# The state of a newly created Drone is None, since the plugins need
# to be notified on the first state change. As calling the
# ``set_state`` coroutine is not possible in the constructor, we
# initiate the first state change here
await self.set_state(RequestState())
while True:
current_state = self.state
await current_state.run(self)
if isinstance(current_state, DownState):
logger.debug(
f"Garbage Collect Drone: {self.resource_attributes.drone_uuid}"
)
self._demand = 0
return
await asyncio.sleep(self.heartbeat_interval)
[docs] def register_plugins(self, observer: Union[List[Plugin], Plugin]) -> None:
self._plugins.append(observer)
[docs] def remove_plugins(self, observer: Union[List[Plugin], Plugin]) -> None:
self._plugins.remove(observer)
[docs] async def set_state(self, state: State) -> None:
"""Should be replaced by asynchronous state.setter property once available"""
if state.__class__ != self.state.__class__:
self.resource_attributes.updated = datetime.now()
self._state = state
await self.notify_plugins()
else:
self._state = state
@property
def state(self) -> State:
return self._state
[docs] async def notify_plugins(self) -> None:
for plugin in self._plugins:
await plugin.notify(self.state, self.resource_attributes)