Architecture Patterns with Python

“Architecture Patterns with Python” delves into the intricacies of designing robust and efficient software architectures using Python. The document explores various architectural patterns and their applications in real-world scenarios. It discusses the importance of choosing the right architecture to meet specific project requirements and highlights best practices for implementing these patterns effectively. Additionally, the document provides insights into optimizing performance, scalability, and maintainability of Python-based systems through the application of proven architectural principles. Overall, “Architecture Patterns with Python” serves as a comprehensive guide for developers looking to enhance their architectural design skills in Python programming.

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A Brief Interlude: On Coupling and Abstractions

 Architecture Patterns with Python

Allow us a brief digression on the subject of abstractions, dear reader. We’ve talked about abstractions quite a lot. The Repository pattern is an abstraction over permanent storage, for example. But ...

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Unit of Work Pattern

 Architecture Patterns with Python

In this chapter we’ll introduce the final piece of the puzzle that ties together the Repository and Service Layer patterns: the Unit of Work pattern. If the Repository pattern is our abstraction over ...

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Event-Driven Architecture: Using Events to Integrate Microservices

 Architecture Patterns with Python

In the preceding chapter, we never actually spoke about how we would receive the "batch quantity changed" events, or indeed, how we might notify the outside world about reallocations. We have a micros...

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Aggregates and Consistency Boundaries

 Architecture Patterns with Python

In this chapter, we’d like to revisit our domain model to talk about invariants and constraints, and see how our domain objects can maintain their own internal consistency, both conceptually and in pe...

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Going to Town on the Message Bus

 Architecture Patterns with Python

In this chapter, we’ll start to make events more fundamental to the internal structure of our application. We’ll move from the current state in Before: the message bus is an optional add-on , where ev...

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Repository Pattern

 Architecture Patterns with Python

It’s time to make good on our promise to use the dependency inversion principle as a way of decoupling our core logic from infrastructural concerns. We’ll introduce the Repository pattern, a simplifyi...

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Introduction

 Architecture Patterns with Python

Why Do Our Designs Go Wrong? What comes to mind when you hear the word chaos? Perhaps you think of a noisy stock exchange, or your kitchen in the morning—​everything confused and jumbled. When you thi...

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Summary Diagram and Table

 Architecture Patterns with Python

Here’s what our architecture looks like by the end of the book: The components of our architecture and what they all do recaps each pattern and what it does.

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Event-Driven Architecture

 Architecture Patterns with Python

I’m sorry that I long ago coined the term "objects" for this topic because it gets many people to focus on the lesser idea. The big idea is "messaging."…​The key in making great and growable systems i...

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Command-Query Responsibility Segregation (CQRS)

 Architecture Patterns with Python

In this chapter, we’re going to start with a fairly uncontroversial insight: reads (queries) and writes (commands) are different, so they should be treated differently (or have their responsibilities ...

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Commands and Command Handler

 Architecture Patterns with Python

In the previous chapter, we talked about using events as a way of representing the inputs to our system, and we turned our application into a message-processing machine. To achieve that, we converted ...

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Repository and Unit of Work Patterns with Django

 Architecture Patterns with Python

Suppose you wanted to use Django instead of SQLAlchemy and Flask. How might things look? The first thing is to choose where to install it. We put it in a separate package next to our main allocation c...

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