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MicroProfile generated Application

Introduction

MicroProfile Starter has generated this MicroProfile application for you containing some endpoints which are called from the main application (see the service-a directory)

The generation of the executable jar file can be performed by issuing the following command

mvn clean compile quarkus:build

This will create a jar file quarkus-runner.jar within the target maven folder. This can be started by executing the following command

java  -jar target/quarkus-runner.jar

You can also start the project in development mode where it automatically updates code on the fly as you save your files:

mvn  clean compile quarkus:dev

Last but not least, you can build the whole application into a one statically linked executable that does not require JVM:

mvn clean compile quarkus:native-image -Pnative

Native executable build might take a minute. Then you can execute it on a compatible architecture without JVM:

./target/quarkus-runner

Note on Native image

  • You need GraalVM installed from the GraalVM web site. Using the community edition is enough. Version 19.1.1+ is required.
  • The GRAALVM_HOME environment variable configured appropriately
  • The native-image tool must be installed; this can be done by running gu install native-image from your GraalVM directory

Prepare for cloud deployment

Build the docker image

mvn clean compile quarkus:build
docker build -t quarkus-service-b:1.0 .

Test the docker image

docker run -i --rm -p 8080:8080 quarkus-service-b:1.0

Test the image by hitting this url

http://localhost:8080/data/client/service/host

Specification examples

JWT Auth

Have a look at the TestSecureController class (main application) which calls the protected endpoint on the secondary application. The ProtectedController contains the protected endpoint since it contains the @RolesAllowed annotation on the JAX-RS endpoint method.

The TestSecureController code creates a JWT based on the private key found within the resource directory. However, any method to send a REST request with an appropriate header will work of course. Please feel free to change this code to your needs.

Rest Client

A type safe invocation of HTTP rest endpoints. Specification here

The example calls one endpoint from another JAX-RS resource where generated Rest Client is injected as CDI bean.