hse-2026/homework/01-guarantees/solution/guarantees.py

from anysystem import Context, Message, Process


# AT MOST ONCE ---------------------------------------------------------------------------------------------------------

class AtMostOnceSender(Process):
    def __init__(self, proc_id: str, receiver_id: str):
        self._id = proc_id
        self._receiver = receiver_id

    def on_local_message(self, msg: Message, ctx: Context):
        # receive message for delivery from local user
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver here
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


class AtMostOnceReceiver(Process):
    def __init__(self, proc_id: str):
        self._id = proc_id

    def on_local_message(self, msg: Message, ctx: Context):
        # not used in this task
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver
        # deliver message to local user with ctx.send_local()
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


# AT LEAST ONCE --------------------------------------------------------------------------------------------------------

class AtLeastOnceSender(Process):
    def __init__(self, proc_id: str, receiver_id: str):
        self._id = proc_id
        self._receiver = receiver_id

    def on_local_message(self, msg: Message, ctx: Context):
        # receive message for delivery from local user
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver here
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


class AtLeastOnceReceiver(Process):
    def __init__(self, proc_id: str):
        self._id = proc_id

    def on_local_message(self, msg: Message, ctx: Context):
        # not used in this task
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver
        # deliver message to local user with ctx.send_local()
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


# EXACTLY ONCE ---------------------------------------------------------------------------------------------------------

class ExactlyOnceSender(Process):
    def __init__(self, proc_id: str, receiver_id: str):
        self._id = proc_id
        self._receiver = receiver_id

    def on_local_message(self, msg: Message, ctx: Context):
        # receive message for delivery from local user
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver here
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


class ExactlyOnceReceiver(Process):
    def __init__(self, proc_id: str):
        self._id = proc_id

    def on_local_message(self, msg: Message, ctx: Context):
        # not used in this task
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver
        # deliver message to local user with ctx.send_local()
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


# EXACTLY ONCE + ORDERED -----------------------------------------------------------------------------------------------

class ExactlyOnceOrderedSender(Process):
    def __init__(self, proc_id: str, receiver_id: str):
        self._id = proc_id
        self._receiver = receiver_id

    def on_local_message(self, msg: Message, ctx: Context):
        # receive message for delivery from local user
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver here
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass


class ExactlyOnceOrderedReceiver(Process):
    def __init__(self, proc_id: str):
        self._id = proc_id

    def on_local_message(self, msg: Message, ctx: Context):
        # not used in this task
        pass

    def on_start(self, ctx: Context):
        pass

    def on_message(self, msg: Message, sender: str, ctx: Context):
        # process messages from receiver
        # deliver message to local user with ctx.send_local()
        pass

    def on_timer(self, timer_name: str, ctx: Context):
        # process fired timers here
        pass