DAPR FOR JAVA DEVELOPER! + https://www.diagrid.io/blog/dapr-for-java-developers

@salaboy Software Engineer at Diagrid 45% Discount Code: mtsoujava45

@mcruzdev1 Software Engineer at MercadoLibre ● Contributing with quarkiverse/quarkus-openapi-ge nerator Quarkus extension ● Contributing with quarkiverse/quarkus-dapr Quarkus extension ● Blog in matheuscruz.dev

Agenda - Introduction - Development challenges - Kubernetes & Containers - What are our applications doing 80% of the time? - What is Dapr? Why should I care? - Demo

The challenge to focus on what matters The developer has always been concerned about some things in his day-to-day life: 1. Environment runtime 2. Application configuration 3. Infrastructure 4. Libraries and dependencies 5. And more, and more non functional requirements All this to solve business problems!

Before ... - Security - Transaction management - Connection pools - Service discovery - Messaging - Load balancing - Standardization evicting vendor lock-in - Etc …

But … - Shared CPU, memory and File System - My application depends on the application server's libraries - ClassLoader issues - Difficulty in having a microservices architecture - Bad developer experience, some configurations

No need for an application server - Conventions over configuration - Simplicity - One JVM per application - A more favorable environment for microservices - A better development and runtime environment

But … I still need to worry about libraries/dependencies and some core services that were once provided by application servers.

After

After (Java)

But what are our applications doing 80% of the time? - How many of your applications are reading or storing data? - How many of your applications are consuming and emitting events? - How many of your applications are calling other services?

The challenge to focus on what matters The developer has always been concerned about some things in his day-to-day life: 1. Environment runtime 2. Application configuration 3. Infrastructure 4. Libraries and dependencies All this to solve business problems!

The challenge now is abstract infra and libs

https://dapr.io

What is Dapr? And why you should care? - Stands for: Distributed Application Runtime - Mostly, but not only, a Kubernetes Extension - A CNCF Project, this is important because it means that is supported by multiple companies and community users - Dapr gives developers application-level APIs to interact with other services and infrastructure

With Dapr

Dapr installation Demo - Let’s install Dapr in a Kubernetes Cluster - Let’s deploy a simple application to show Dapr in action

Diagrid’s Conductor

Ok, but.. This is way too much for developers! - To get this working we need: - A Kubernetes Cluster - Install Dapr - Configure infrastructure to be accessible using Components - Write a lot of YAML

Dapr for Spring Boot and Quarkus - Luckily we have integrations with Spring Boot and Quarkus - Java Developers can use the Dapr APIs without the need of a Kubernetes Cluster or even installing Dapr

Spring Boot Dependencies and Configs +

Quarkus Dependencies and Configs

Takeaways - Dapr decouples the application code from infrastructure - While promoting best practices and stable APIs - You can build complex development experiences using tools like Testcontainers

Questions?