Java, Turbocharged!

Over the last twenty years, there has been a paradigm shift in software development: from meticulously planned release cycles to an experimental way of working in which lead times are becoming shorter and shorter.

More and more companies are replacing Java in the Cloud with Go or Node, as they have much faster startup times combined with a much smaller memory footprint, which is especially important in a serverless environment.

After a short introduction, I will demonstrate how we can create a native executable with Quarkus, and how fast we can scale a large cluster of Quarkus containers in the cloud.

Transcript

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9. Build a new Project mvn io.quarkus:quarkus-maven-plugin:0.17.0:create \ -DprojectGroupId=com.redhat.developers \ -DprojectArtifactId=quarkus-demo \ -DclassName="com.redhat.developers.GreetingResource" \ -Dpath="/hello" http://bit.ly/OpenExpoMadrid
10. Build the Native Docker Image cd quarkus-demo mvn package -Pnative -Dnative-image.docker-build=true docker build -f src/main/docker/Dockerfile.native -t quarkus-demo/demo . docker run -i --rm -p 8080:8080 quarkus-demo/demo http://bit.ly/OpenExpoMadrid
11. http://bit.ly/OpenExpoMadrid
12. Build the Image on Openshift oc new-build --binary --name=quarkus-demo -l app=quarkus-demo oc patch bc/quarkus-demo -p '{"spec":{"strategy":{"dockerStrategy":{"dockerfilePath":"s rc/main/docker/Dockerfile.native"}}}}' oc start-build quarkus-demo --from-dir=. --follow http://bit.ly/OpenExpoMadrid
13. Instantiate the Image oc new-app --image-stream=quarkus-demo:latest http://bit.ly/OpenExpoMadrid
14. Expose the Service oc expose service quarkus-demo http://bit.ly/OpenExpoMadrid
15. Get the Route URL export URL="http://$(oc get route | grep quarkus-demo | awk '{print $2}')" echo $URL curl $URL/hello && echo http://bit.ly/OpenExpoMadrid
16. Scaling Pods watch oc get pods oc scale dc/quarkus-demo --replicas=3 http://bit.ly/OpenExpoMadrid
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19. Creating a Project from Scratch mvn io.quarkus:quarkus-maven-plugin:0.17.0:create http://bit.ly/OpenExpoMadrid
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21. DeveloperResource package com.redhat.developers; @Path("/developers") public class DeveloperResource { @Path("/hello") @GET @Produces(MediaType.TEXT_PLAIN) public String hello() { return "hello"; } } http://bit.ly/OpenExpoMadrid
22. Quarkus on HotspotVM mvn package cd target du -sh * java -jar openexpo-1.0-SNAPSHOT-runner.jar ps ax -o pid,rss,command | numfmt --header --from-unit=1024 --to=iec --field 2 | grep -v grep | grep openexpo http://bit.ly/OpenExpoMadrid
23. List Extensions mvn quarkus:list-extensions http://bit.ly/OpenExpoMadrid
24. Add Extensions mvn quarkus:add-extensions -Dextensions=quarkus-hibernate-orm-panache,quarkus-jdbc-mar iadb,quarkus-resteasy-jsonb,quarkus-smallrye-fault-toleranc e,quarkus-smallrye-rest-client http://bit.ly/OpenExpoMadrid
25. pom.xml <dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-hibernate-orm-panache</artifactId> </dependency> <dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-jdbc-mariadb</artifactId> </dependency> <dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-resteasy-jsonb</artifactId> </dependency> http://bit.ly/OpenExpoMadrid
26. pom.xml <dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-smallrye-fault-tolerance</artifactId> </dependency> <dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-smallrye-rest-client</artifactId> </dependency> http://bit.ly/OpenExpoMadrid
27. Developer package com.redhat.developers; @Entity public class Developer extends PanacheEntity { private String name; public static Developer of(String name) { return new Developer(name); } public String getName() { return name; } private Developer(String name) { this.name = name; } private Developer() { //Panache only } } http://bit.ly/OpenExpoMadrid
28. application.properties quarkus.datasource.url=jdbc:mariadb://localhost:3306/quarkusdb quarkus.datasource.driver=org.mariadb.jdbc.Driver quarkus.datasource.username=developer quarkus.datasource.password=developer quarkus.hibernate-orm.dialect=org.hibernate.dialect.MySQL5Dialect quarkus.hibernate-orm.database.generation=update quarkus.http.port=8080 quarkus.http.test-port=8083 com.redhat.developers.HelloClient/mp-rest/url=http://quarkus-demo-mypro ject.192.168.64.11.nip.io http://bit.ly/OpenExpoMadrid
29. Quarkus Developer Mode mvn compile quarkus:dev http://bit.ly/OpenExpoMadrid
30. DeveloperResource package com.redhat.developers; @GET @Produces(MediaType.APPLICATION_JSON) public List<Developer> developers() { return Developer.listAll(); } @Path("/new/{name}") @GET @Produces(MediaType.APPLICATION_JSON) @Transactional public Developer newDeveloper(@PathParam("name") String name) { Developer developer = Developer.of(name); developer.persist(); return developer; } http://bit.ly/OpenExpoMadrid
31. HelloClient package com.redhat.developers; @RegisterRestClient public interface HelloClient { @Path("/hello") @GET @Produces(MediaType.TEXT_PLAIN) String hello(); } http://bit.ly/OpenExpoMadrid
32. DeveloperResource package com.redhat.developers; @Path("/developers") public class DeveloperResource { @Inject @RestClient private HelloClient helloClient; @Path("/hello") @GET @Produces(MediaType.TEXT_PLAIN) @Fallback(fallbackMethod = "onFallback") public String helloWorld() { return helloClient.hello(); } private String onFallback() { return "Hola Madrid!"; } } http://bit.ly/OpenExpoMadrid