Mock a Two-Phase Commit Coordinator in Python

import random
import time
from typing import Dict, List


class TwoPhaseCommitCoordinator:
    def __init__(self, participants: List[str]):
        self.participants = participants
        self.participant_state: Dict[str, bool] = {}

    def prepare(self) -> bool:
        print("[Coordinator] Phase 1: Prepare")
        for participant in self.participants:
            decision = random.choice([True, False])
            self.participant_state[participant] = decision
            print(f"  {participant} -> {'ready' if decision else 'abort'}")
            time.sleep(0.1)
        return all(self.participant_state.values())

    def commit(self):
        print("[Coordinator] Phase 2: Commit")
        for participant in self.participants:
            print(f"  {participant} -> committed")

    def abort(self):
        print("[Coordinator] Phase 2: Abort")
        for participant in self.participants:
            print(f"  {participant} -> rolled back")

    def run(self):
        if self.prepare():
            self.commit()
        else:
            self.abort()


if __name__ == "__main__":
    coordinator = TwoPhaseCommitCoordinator(["db_a", "db_b", "db_c"])
    coordinator.run()