Dapr for Java Developers (JJUG)

For more information visit: https://www.salaboy.com

Transcript

1. The evolution of cloud native software (Dapr for Java Developers) &
2. https://www.diagrid.io/blog/dapr-for-java-developers https://www.diagrid.io/blog/dapr-for-spring-boot
3. @Salaboy Mauricio Salatino Software Engineer @ Diagrid https://salaboy.com
4. Why am I here? I am here to gather feedback from the Java community. Spring Boot and Quarkus integrations are in active development, we need feedback. It is a great opportunity to contribute to an Open Source project with your Java expertise.
5. Agenda 1. Introduction a. Development challenges b. Kubernetes & Containers c. What are our applications doing 80% of the time? 2. What is Dapr? Why should I care? 3. Demo
6. The challenge: to focus on what matters Developers are often distracted with details around: All this to solve business problems! Application Configuration Libraries and Dependencies … more, and more non-functional requirements Infrastructure Environment Runtime
7. Some time ago ... Application Servers • Security • Transaction management • Connection pools • Service discovery • Messaging • Load balancing • etc …
8. But… • Shared CPU, memory and File System • Apps depends on the application server's libraries • ClassLoader issues • Promoted silo-ed operations vs development
9. With the rise of containers • Conventions over configuration • Simplicity • One JVM per application • Much more aligned for microservices • A better development and runtime environment
10. Containerized Java Application
11. But… I still need to worry about libraries/dependencies and some core services that were once provided by application servers.
13. Application on Kubernetes
14. Java on Kubernetes
15. 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?
16. The challenge: to focus on what matters Developers are often distracted with details around: All this to solve business problems! Environment Runtime Libraries and Dependencies Infrastructure Application Configuration ✅ ✅
17. The challenge now is abstract infra and libs
18. dapr.io
20. What is Dapr? Why you should care? • Distributed application runtime • A Kubernetes Extension • Provides application-level APIs to interact with other services and infrastructure
21. With Dapr
22. For example: producer -> consumer apps
23. For example: producer -> consume apps
24. Let’s run this app on Kubernetes • To run this app in Kubernetes: • Create a cluster • Install Dapr • Install RabbitMQ and PostgreSQL • Install the app services
25. Diagrid Conductor https://conductor.diagrid.io/
26. 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
27. The Dapr Java SDK
28. Creating a Dapr Client and using the APIs
29. Creating a Dapr Client and using the APIs
30. Creating a Dapr Client and using the APIs
31. Creating a Dapr Client and using the APIs
32. Java APIs and Spring - Spring developers expect the “client” lifecycle to be managed - Spring developers already know how to: - Deal with state (Spring Data) - Publishing and subscribing to messages (Spring Kafka, Pulsar, RabbitMQ) - Scheduling async Jobs with @Scheduled 👀👀 👀
34. Dapr for Spring Boot - Dapr integrates nicely with the Spring & Spring Boot ecosystem - Spring developers can use the Dapr APIs without the need of a Kubernetes Cluster or even installing Dapr - It relies on Testcontainers to bootstrap Dapr from your Spring Boot applications - It integrates the Dapr APIs with the Spring programming model
35. The Dapr Spring Boot Starter • State management • PubSub • Secrets • Workflows • Among other APIs
36. @Autowired Dapr Client
37. Testing Dapr-enabled Spring Boot apps Dapr Sidecar Dapr Control Plane Services Spring Boot Application Infrastructure
38. Testing Dapr-enabled Spring Boot apps Dapr Sidecar Dapr Control Plane Services Message Broker Spring Boot Application DB
39. Dapr & the Spring programming model - Spring developers use Spring Data to store and retrieve data - Spring developers use Spring Messaging to publish and subscribe to messages - Workflows and Spring Developers
40. Spring Data and Repositories
41. Spring Data and Repositories
42. How it works? App Dapr Sidecar Dapr Control Plane Services Spring Data Repository KeyValue Store DaprClient The app doesn’t have any dependency to the infrastructure Dapr handles the connection pool and adds resiliency policies to all connections with infrastructure
43. Spring Messaging (Kafka, Pulsar, RabbitMQ)
44. Subscribe to async messages
45. How it works? App DaprClient The app doesn’t have any dependency to the infrastructure Dapr handles the connection pool and adds resiliency policies to all connections with infrastructure Dapr Sidecar Dapr Control Plane Services Spring Messaging Kafka
46. Dapr Workflows for Durable executions Register Customer Book Customer Follow up Wait for Customer to reachout Create complex service orchestrations that are fault tolerant and resilient.
47. Integrating with your existing systems
48. Interacting with workflows
49. Helping devs to focus on what matters Let’s code some new features! Environment Runtime Libraries and Dependencies Infrastructure Application Configuration ✅ ✅ ✅ ✅
50. We need your help We need your help to make this integration awesome! Get in touch if you want to contribute. I am happy to mentor anyone who wants to contribute to Open Source.
51. ご静聴ありがとうご ざいました ! @salaboy / @daprdev / @diagridio dapr.io diagrid.io diagrid.io
52. Thanks! @salaboy / @daprdev / @diagridio dapr.io diagrid.io diagrid.io
53. Dapr for Java Developers &