Modern Java App Development in the Cloud

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GeeCon Krakow 2023 Modern Java App Development in the Cloud Rustam Mehmandarov @RMehmandarov Mads Opheim @MadsOpheim

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The main story: From code ---> to production

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3 Questions? Url: sli.do Code: #geecon Room 1 (we have hoodies and stickers!)

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Our application We want an application that gives us two random words 4

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Screenshot e.l. 5

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Screenshot e.l. 6

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Step 1: The logic 7

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Step 2: Running code 9

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Screenshot e.l. 10

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Jakarta EE + MicroProﬁle to the rescue! 11

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Wait! What is this MicroProﬁle thing?

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Jakarta EE for microservices 13

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Authentication 3.0 Concurrency 3.0 CDI 4.0 Persistence 3.1 Faces 4.0 Security 3.0 Servlet 6.0 Standard Tag Libraries 3.0 Server Pages 3.1 WebSocket 2.1 Bean Validation 3.0 Debugging Support 2.0 Enterprise Beans Lite 4.0 Managed Beans 2.0 Transactions 2.0 Jakarta EE 10 Platform Jakarta EE 10 Web Proﬁle Jakarta EE 10 Platform Interceptors 2.1 Dependency Injection 2.0 Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Messaging 3.1 Enterprise Beans 4.0 Mail 2.1 JSON Binding 3.0 Annotations 2.1 Updated Not Updated New Jakarta EE 10 Core Proﬁle Expression Language 5.0 Restful Web Services 3.1 Json Processing 2.1 Dependency Injection 2.0 CDI Lite 4

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15 MicroProfile 6.0 Jakarta EE 10 Core Profile Config 3.0 Fault Tolerance 4.0 JWT Authentication 2.1 Health 4.0 Metrics 5.0 Open Tracing 3.0 Open API 3.1 = Updated = No change from last release = New Rest Client 3.0 Standalone Context Propagation 1.3 Reactive Streams Operators 3.0 Outside umbrella Reactive Messaging 3.0 GraphQL 2.0 LRA 2.0 MicroProfile Releases in 2022 Telemetry 1.0

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● MicroProfile is an open-source community specification for Enterprise Java microservices ● A community of individuals, organizations, and vendors collaborating within an open source Eclipse Foundation Working Group to bring microservices to the Enterprise Java community 16 What is MicroProﬁle?

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17 Working Group Corporate Members

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Why MicroProﬁle?

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Write your logic, not boilerplate code 19

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Lightweight 20

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Interchangeable 21

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22 Current MicroProﬁle Implementations

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Where do I start?

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24 https://start.microprofile.io/

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It works on my machine! Now what? 26

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Step 3: Containerize it! 27

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Your Dockerﬁle Things to consider: - Multistage builds - Slim base images - Layers - etc. 28

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Step 4: To the Cloud! ...and beyond? 29

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Automate your builds! ...and everything else!

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31 Cloud Build

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Dockerﬁle - or - cloudbuild.yaml 32

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So now we have built a container image in the Cloud. Now what? 33

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Serverless, of course!

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When not to go serverless? 37

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Step 5: Make it fast! 🏎 38

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Runtimes diﬀer... 39

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HowTo: Migrating to Quarkus 1. Download the Quarkus starter, copy the Dockerfiles and pom files into your project 2. Adapt the pom file to your project 3. Move config to application.properties 4. Update your cloudbuild.yaml 5. Run 41

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Step 6: And even faster! 🏎🏎 43

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+ 44

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Voila! 🎉

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46 Question time! url: sli.do code: #geecon

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Everything’s on GitHub! 47 https://github.com/mehmandarov/microproﬁle-randomstrings https://github.com/madsop/quarkus-multistage https://microproﬁle.io https://quarkus.io https://cloud.google.com

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Thank you! Rustam Mehmandarov @RMehmandarov Mads Opheim @MadsOpheim