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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…

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Microservices patterns easy

How to Implement a Data Helper for Microservices in Python

Create a reusable helper class to serialize, deserialize, and wrap data for microservice communication using dataclasses and JSON.

microservices json dataclass

Python

import json
from dataclasses import dataclass, asdict
from typing import Any, Dict, List


@dataclass
class ServiceResponse:
    status: str
    data: Any
    message: str = ""


class DataHelper:
    """Simple helper for microservice data handling."""

    @staticmethod
    def serialize(data: Dict[str, Any]) -> str:…

13 0 Open

Microservices patterns easy

How to Implement an Outbox Pattern Mock in Python

This code demonstrates a simple in-memory outbox pattern mock for publishing domain events and tracking pending events until they are marked as published.

outbox domain-events microservices

Python

from dataclasses import dataclass, field
from datetime import datetime
from uuid import uuid4


@dataclass
class DomainEvent:
    event_id: str = field(default_factory=lambda: str(uuid4()))
    occurred_at: datetime = field(default_factory=datetime.utcnow)


class Outbox:
    def __init__(self):
        self._events =…

13 0 Open

Microservices patterns easy

How to Mock a GraphQL Backend in Python

Create an in-memory GraphQL mock backend using dataclasses and resolver methods returning plain dictionaries.

graphql mock dataclasses

Python

from dataclasses import dataclass, asdict
from typing import Any, Dict, List


@dataclass
class Product:
    id: int
    name: str
    price: float


@dataclass
class User:
    id: int
    username: str


class MockGraphQLBackend:
    def __init__(self) -> None:
        self.products = [
            Product(id=1, name…

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