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Milan Jovanović

@mjovanovictech

Aug 10, 2023

Thinking about separate read/write databases?

Here's what you should know first.

Using separate read and write databases offers a range of benefits:
- Better performance
- Increased scalability
- Fault tolerance

Let's break them down.

𝗕𝗲𝘁𝘁𝗲𝗿 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲

By separating reads from writes, you can tune each database for its specific purpose.

𝗜𝗻𝗰𝗿𝗲𝗮𝘀𝗲𝗱 𝘀𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆

You can scale each database independently when using separate read and write databases. This is particularly useful when your application's queries lean heavily to one side.

Read 8 tweets

Milan Jovanović

@mjovanovictech

Aug 9, 2023

What is the RIGHT way to use HttpClient in .NET?

HttpClient is an excellent abstraction and incredibly easy to work with.

Unfortunately, it's also easy to misuse, leading to problems like port exhaustion.

You need to know how NOT to use it.

If you think IHttpClientFactory will solve all your problems, you're only partly right.

Should you use named clients or typed clients?

Microsoft was kind enough to provide us with a set of best practices and recommended use for HttpClient.

- Use a static or singleton HttpClient instance with a PooledConnectionLifetime configured since this solves both port exhaustion and tracking DNS changes

Read 6 tweets

Milan Jovanović

@mjovanovictech

Jul 25, 2023

What is a webhook?

Imagine this:

You have a website or an application, and you want it to automatically do things without you having to trigger them manually.

That's where webhooks come in!

Webhooks are like little messengers that allow one system to send a message or data to another system in real-time whenever a specific event happens.

It's like getting a notification on your phone when someone comments on your social media post or when you receive an email.

Webhooks work similarly but for systems and applications.

A webhook is a way for one system to send a message or data to another system in real-time whenever something important happens.

Read 9 tweets

Milan Jovanović

@mjovanovictech

Jul 24, 2023

You don't need to start with Microservices.

Even if you're confident your application will be big enough to justify Microservices.

And here's why. 👇

Microservices come with a premium.

The Microservices premium:
- Team coordination
- Dealing with failure
- Eventual consistency
- Automating deployments
- Managing multiple services

And many other factors.

You probably don't need this complexity at the start of a new project.

Ask yourself:
- Is it valuable to your users?

The experience of your team plays a significant role.

Read 7 tweets

Milan Jovanović

@mjovanovictech

Jul 17, 2023

What are the SOLID principles? 🤔

As a .NET developer, I'm always looking for ways to improve the quality and maintainability of my code.

I want to share my experiences using the SOLID principles and how they've helped me create better code.

First, let's define what we mean by SOLID.

The acronym 𝗦𝗢𝗟𝗜𝗗 stands for:
- Single responsibility principle
- Open/closed principle
- Liskov substitution principle
- Interface segregation principle
- Dependency inversion principle

Let's break them down. 🔬

1. 𝗦𝗶𝗻𝗴𝗹𝗲 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗣𝗿𝗶𝗻𝗰𝗶𝗽𝗹𝗲 (𝗦𝗥𝗣)

A class should have only one reason to change. In other words, a class should have a single, well-defined responsibility. That class should entirely encapsulate responsibility.

Read 13 tweets

Milan Jovanović

@mjovanovictech

Jul 12, 2023

I've been using Clean Architecture for 5 years and counting.

Here's why I think it's amazing. 👇

Clean architecture isn't revolutionary.

But it is opinionated about how to structure your code.

It's just another form of layered architecture.

The core concept you need to grasp is the Domain.

Another way to think about Clean architecture is that it's a Domain-centric architecture.

The Domain is at the center of the architecture, and it's treated as the most essential part.

The other components support the Domain.

What are some common Domain-centric architectures?
- Hexagonal architecture
- Clean architecture
- Onion architecture

They all revolve around the same idea.

Read 12 tweets

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