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78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
from . import BaseAgent
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from ..events import Message, Tell, Ask, TimedOut
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from ..time import BaseCond
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from functools import partial
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from collections import deque
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class ReceivedOrTimeout(BaseCond):
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def __init__(
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self, agent, expiration=None, timeout=None, check=True, ignore=False, **kwargs
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):
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if expiration is None:
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if timeout is not None:
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expiration = agent.now + timeout
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self.expiration = expiration
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self.ignore = ignore
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self.check = check
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super().__init__(**kwargs)
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def expired(self, time):
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return self.expiration and self.expiration < time
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def ready(self, agent, time):
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return len(agent._inbox) or self.expired(time)
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def return_value(self, agent):
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if not self.ignore and self.expired(agent.now):
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raise TimedOut("No messages received")
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if self.check:
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agent.check_messages()
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return None
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def schedule_next(self, time, delta, first=False):
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if self._delta is not None:
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delta = self._delta
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return (time + delta, self)
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def __repr__(self):
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return f"ReceivedOrTimeout(expires={self.expiration})"
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class EventedAgent(BaseAgent):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._inbox = deque()
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self._processed = 0
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def on_receive(self, *args, **kwargs):
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pass
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def received(self, *args, **kwargs):
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return ReceivedOrTimeout(self, *args, **kwargs)
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def tell(self, msg, sender=None):
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self._inbox.append(Tell(timestamp=self.now, payload=msg, sender=sender))
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def ask(self, msg, timeout=None, **kwargs):
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ask = Ask(timestamp=self.now, payload=msg, sender=self)
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self._inbox.append(ask)
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expiration = float("inf") if timeout is None else self.now + timeout
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return ask.replied(expiration=expiration, **kwargs)
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def check_messages(self):
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changed = False
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while self._inbox:
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msg = self._inbox.popleft()
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self._processed += 1
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if msg.expired(self.now):
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continue
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changed = True
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reply = self.on_receive(msg.payload, sender=msg.sender)
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if isinstance(msg, Ask):
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msg.reply = reply
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return changed
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Evented = EventedAgent
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