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58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
from . import BaseAgent
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from ..events import Message, Tell, Ask, Reply, TimedOut
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from ..time import Cond
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from functools import partial
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from collections import deque
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class Evented(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._received = 0
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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, expiration=None, timeout=None):
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current = self._received
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if expiration is None:
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expiration = float('inf') if timeout is None else self.now + timeout
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if expiration < self.now:
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raise ValueError("Invalid expiration time")
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def ready(agent):
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return agent._received > current or agent.now >= expiration
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def value(agent):
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if agent.now > expiration:
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raise TimedOut("No message received")
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c = Cond(func=ready, return_func=value)
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c._checked = True
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return c
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def tell(self, msg, sender):
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self._received += 1
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self._inbox.append(Tell(payload=msg, sender=sender))
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def ask(self, msg, timeout=None):
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self._received += 1
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ask = Ask(payload=msg)
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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)
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def check_messages(self):
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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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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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