README.md

How to ...

How to run

jbang run https://gist.github.com/misTrasteos/0d70da25e3db9101b4d47d20f86ee566#file-quarkusrest-java

How to generate load

echo "GET http://localhost:8080/MyObject" | vegeta attack -duration=1s -rate=1000 | vegeta report --type=text

How to get an object histogram

jcmd $(jps | grep GeneratedMain | cut -d " " -f1) GC.class_histogram -all | grep MyObject

How to gc

jcmd $(jps | grep GeneratedMain | cut -d " " -f1) GC.run

Test

• Start Quarkus Rest server
• Make a couple of request using curl http://localhost:8080/MyObject
• Ensure there are two instances of MyObject using the histogram
• Force a collection
• Ensure there are not MyObject instances in the heap

QuarkusRest.java

//usr/bin/env jbang "$0" "$@" ; exit $?

//DEPS io.quarkus:quarkus-resteasy:2.5.1.Final
//DEPS io.quarkus:quarkus-resteasy-jackson:2.5.1.Final 

//JAVAC_OPTIONS -parameters
//JAVA_OPTIONS -Djava.util.logging.manager=org.jboss.logmanager.LogManager

import io.quarkus.runtime.Quarkus;
import javax.enterprise.context.ApplicationScoped;
import io.quarkus.runtime.annotations.RegisterForReflection;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import java.util.function.Supplier;

@Path("/MyObject")
@ApplicationScoped
public class QuarkusRest {

  // I need this annotation as the bean is empty
  @RegisterForReflection
  class MyObject{}

  @GET
  @Produces(MediaType.APPLICATION_JSON)
  public MyObject getMyObject() {
    return new MyObject();
  }

}