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Microservices patterns

Service boundaries, discovery, inter-service calls, and decomposition patterns.

4 matches

BFF aggregation pattern: combine multiple service responses in Python

Mock three backend services and aggregate their responses into one unified payload — the BFF pattern every Python microservice gateway relies on.

bff aggregation microservices

Python

from dataclasses import dataclass
from typing import Any


@dataclass
class Service:
    name: str
    data: dict[str, Any]


def get_user_service() -> Service:
    return Service("user", {"id": 1, "name": "Alice"})


def get_orders_service() -> Service:
    return Service("orders", {"total": 299.99, "count": 2})


de…

13 0 Open

Microservices patterns easy

How to Compose Parallel API Calls in Python with asyncio.gather

Compose multiple mock API responses in parallel using asyncio.gather with per-service simulated latency.

asyncio concurrency api

Python

import asyncio
import random
import time

async def mock_api(name: str, delay: float) -> dict:
    await asyncio.sleep(delay)
    return {"service": name, "value": random.randint(1, 100)}

async def fetch_all():
    services = {
        "users": mock_api("users", 0.2),
        "orders": mock_api("orders", 0.3),
      …

15 0 Open

Microservices patterns easy

How to Demonstrate the Shared Database Antipattern in Python

This code simulates a shared database where multiple services write and read the same SQLite table, illustrating tight coupling and its pitfalls.

microservices database antipatterns

Python

import sqlite3
from pathlib import Path

def create_shared_db(db_path: Path) -> None:
    """Mock demonstrating the shared database antipattern where multiple
    services access the same database, causing tight coupling."""
    conn = sqlite3.connect(db_path)
    cur = conn.cursor()
    cur.execute("""
        CREATE…

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Microservices patterns easy

Idempotent Consumer Event Processing in Python

Track processed event IDs to skip duplicates and count event types for a reliable, idempotent consumer.

idempotency events microservices

Python

import json
from collections import defaultdict

class EventProcessor:
    def __init__(self):
        self.processed_ids = set()
        self.counts = defaultdict(int)

    def process_event(self, event):
        event_id = event["id"]
        if event_id in self.processed_ids:
            return {"status": "skipped"…

13 0 Open

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