Reference library

Reliability & rate limiting

Retries, exponential backoff, circuit breakers, token buckets, and idempotent handlers.

3 matches

How to Mock a Slow Startup Probe in Python

Simulate slow service initialization with a configurable mock delay to test readiness probes.

import time
from dataclasses import dataclass, field


@dataclass
class StartupProbe:
    name: str
    min_wait_sec: float = 0.5
    max_wait_sec: float = 2.0
    _ready: bool = field(default=False, init=False, repr=False)

    def initialize(self) -> None:
        """Simulate slow startup with a fixed mock delay."""…

13 0 Open

Reliability & rate limiting easy

How to Stop Receiving Requests Until Ready in Python

A mock server that refuses requests until a readiness gate is passed, simulating fail-stop behavior for production reliability.

readiness fail-stop mock-server

Python

import random
import time


class MockServer:
    def __init__(self):
        self.ready = False
        self.requests_received = 0

    def readiness_check(self):
        """Simulates a readiness probe. Returns True only when ready."""
        if not self.ready:
            return False
        return True

    def r…

14 0 Open

Reliability & rate limiting medium

Mock a Two-Phase Commit Coordinator in Python

Simulates a two-phase commit protocol where a coordinator asks participants to prepare, then commits or aborts based on unanimous readiness.

two-phase commit distributed systems transactions

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")
     …

12 0 Open

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