The cloud has fundamentally changed how we design applications and introduced whole new categories of software-development disasters. With a focus on Java, this talk will introduce some of the new tools, patterns, and best practices for modern distributed application development. It also gives a tour of some of the most painful anti-patterns Holly has seen as a cloud consultant.

Target Audience: Architects, Developers, Strategic Decision Makers
Prerequisites: Basic experience of cloud computing, Knowledge of Java
Level: Advanced

Extended Abstract:
The cloud is just someone else's data center, but it has fundamentally changed how we design software and what we expect from our platforms. Our applications have gotten bigger, more distributed, and more complicated, and there are whole new categories of mistakes we can make. Some things that were a good idea ten years ago turn out to be a terrible idea in the cloud; and what used to be ‘good enough’ for testing really isn’t anymore. Managing microservices architecture demands a lot of us, to ensure observability, operational resiliency, and organisational agility. With a focus on Java, this talk will introduce some of the new tools, patterns, and best practices for modern distributed application development. It also gives a tour of some of the most painful anti-patterns Holly has seen as a cloud consultant.

You've heard about this new feature in C++20, Coroutines, but it's the first time you have encountered this term? Then this talk is what you're looking for. We start from the beginning with just "normal" functions. Next, we introduce Coroutines. Using them, we explore the various customization points C++ offers. Another distinction we make is cooperative and preemptive multitasking, opening the door for another beauty of Coroutines, why we don't need locks.
By the end of this talk, you've learned what coroutines are and where you can use them.

Target Audience: Developers
Prerequisites: C++ knowledge
Level: Basic

Extended Abstract:
You've heard about this new feature in C++20, Coroutines, but it's the first time you have encountered this term? Then this talk is what you're looking for. We start from the beginning with just "normal" functions. Next, we introduce Coroutines.
Using them, we explore the various customization points C++ offers. We look at what the new keywords co_await, co_yield, and co_return are for.
Sadly, we also have to talk about how to write a generator for a coroutine since there is no STL part for that in C++20.
Another distinction we make is between cooperative and preemptive multitasking, opening the door for another beauty of
Coroutines, why we don't need locks.
By the end of this talk, you've learned what coroutines are and where you can use them.

As developers, our job is to deliver working software. With the shift to CI/CD and the move to the cloud, the need to have the right feedback at the right time only increases. There are many ways that testing can help us with that. Not only can testing help us verify our solution and prevent us from breaking things, it can also help us design our software, find flaws in our architecture and come up with better solutions. In this talk I will highlight some of the many ways that testing can help you to develop better software faster.

Target Audience: Developers
Prerequisites: Basic knowledge in Java
Level: Advanced

Extended Abstract:
Testing doesn't always get the attention it deserves in software development. Many developers claim to be bad at it, or are just not that interested. (These may or may not be related.)

As developers, our job is to deliver working software. With the shift to CI/CD and the move to the cloud, the need to have the right feedback at the right time only increases. There are many ways that testing can help us with that. Not only can testing help us verify our solution and prevent us from breaking things, it can also help us design our software, find flaws in our architecture and come up with better solutions.

In this talk I will highlight some of the many ways that testing can help you to develop better software faster.

In this session I’ll examine some of the things that can go wrong when organisations jump headfirst into micro-service architectures without understanding the potential pitfalls.

I'll explain contract testing from the ground up. You'll learn how it can decouple micro-service dependencies during development, allowing your teams to work effectively. And I'll describe sophisticated, free, open-source tooling that helps integrate contract testing into your software lifecycle, giving you the confidence to release micro-services independently.

Target Audience: Architects, Developers, Decision Makers, Release Managers, DevOps
Prerequisites: English, basic software design/architecture, software lifecycle
Level: Advanced

Java applications are widely used and often several years old. You can use these applications in the cloud via lift-and-shift (helps nothing) or you can rewrite the application in cloud-native style and use the advantages of the cloud.

An alternative for existing applications is missing here. It must be possible to go to the cloud and use advantages such as serverless and scale-to-zero WITHOUT having to rewrite the entire application.
I will show what is already working well today and where the rough edges are.

Target Audience: Architects, Developers
Prerequisites: None
Level: Basic

Additional information:
In the session, we'll move an existing application to the cloud and save over 70 % of operating and maintenance costs with serverless and scale-to-zero.