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"""Plugin that detects whether IDS has set on non-resident agent start."""
import asyncio
import contextlib
import logging
from defence360agent import utils
from defence360agent.contracts import plugins, sentry, messages
from im360.internals import strategy
from im360.contracts import config
logger = logging.getLogger(__name__)
class StrategyGetter(plugins.MessageSource):
"""Send StrategyChange message on non-resident agent start."""
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.__task = None
async def create_source(self, loop, sink):
self._loop = loop
self._sink = sink
self.__task = loop.create_task(self._detect_strategy_change())
async def shutdown(self):
if self.__task is None or self.__task.done():
return
self.__task.cancel()
with contextlib.suppress(asyncio.CancelledError):
await self.__task
@utils.abort_agent_on(Exception)
async def _detect_strategy_change(self):
"""Check whether IDS has changed periodically."""
with contextlib.suppress(asyncio.CancelledError):
while True:
await self._refresh_strategy()
await asyncio.sleep(
config.Subsys.THIRD_PARTY_IDS_CHECK_TIMEOUT
)
async def _refresh_strategy(self):
try:
new_strategy = strategy.Strategy.get()
except asyncio.CancelledError:
pass
except Exception as e:
logger.error("Failed to get strategy, %s", e)
else:
if new_strategy != strategy.Strategy.current:
await self._on_strategy_changed(new_strategy)
async def _on_strategy_changed(self, new_strategy):
logger.info(
"Got new strategy: %s -> %s",
strategy.Strategy.current,
new_strategy,
)
strategy.Strategy.current = new_strategy
await self._sink.process_message(
messages.MessageType.StrategyChange(strategy=new_strategy)
)
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