3.2.3 • Public • Published


An asynchronous server for Dodex, Dodex-input and Dodex-mess using the Quarkus Supersonic Subatomic Java Framework.

Install Assumptions

  1. Java 17+ installed with JAVA_HOME set.
  2. Gradle 8+ installed. If you have sdkman installed, execute sdk install gradle 8.6 otherwise executing gradlew should install gradle.
  3. Javascript node with npm package manager installed.

Note: The static directory was changed from src/main/resources/static to src/main/resources/META-INF/resources in compliance with v2.5.

Getting Started

Quick Getting Started

  1. Execute docker build -t dufferdo2/dodex-quarkus:latest -f kube/quarkus/Dockerfile ./kube
  2. Execute docker run -d -p 8088:8088 -p 8071:8071 -p 9901:9901 --name dodex_quarkus dufferdo2/dodex-quarkus
  3. View in browser; localhost:8088/ddex or localhost:8088/ddex/bootstrap.html or localhost:8088/handicap.html
  4. To verify that the image is working, execute docker exec -ti --tty dodex_quarkus /bin/sh and then cat logs/quarkus.log
  5. To keep and run later, execute docker stop dodex_quarkus and later docker start dodex_quarkus
  6. To cleanup execute docker stop dodex_quarkus and docker rm dodex_quarkus and docker rmi dufferdo2/dodex-quarkus and docker rmi envoyproxy/envoy:v1.25.0

Building dodex-quarkus

  1. npm install dodex-quarkus or download from If you use npm install, move node_modules/dodex-quarkus to an appropriate directory.
  2. cd <install directory>/dodex-quarkus/src/main/resources/META-INF/resources and execute npm install --save to install the dodex modules.
  3. cd <install directory>/dodex-quarkus and execute gradlew quarkusDev. This should install java dependencies and startup the server in development mode against the default sqlite3 database. In this mode, any modifications to java source will be recompiled(refresh browser page to recompile).
  4. Execute url http://localhost:8089/test in a browser.
  5. You can also run http://localhost:8089/test/bootstrap.html for a bootstrap example.
  6. Follow instructions for dodex at and
  7. The Cassandra database has been added via an Akka micro-service. See;
  8. Added Cassandra database to the React demo allowing the login component to use Cassandra.
  9. See the Firebase section for using Google's Firestore backend.
  10. To generate jooq code, set DEFAUT_DB=sqlite3 and execute ./gradlew jooqGenerate. The code is generated to src/main/kotlin/golf/handicap/generated.

Note: In dev mode(gradlew quarkusDev), when modifying Java code, all you have to do is refresh the browser window. You can also use gradlew run(in build.gradle) to set ENVIRONMENT variables first.

See: Single Page React Section below on using Dodex in an SPA.


  1. Execute gradlew tasks to view all tasks.

  2. Building the Production Uber jar

    1. Before running the Uber jar for production, do: (graalvm requires the Uber jar)
      • Make sure that the spa react javascript is installed. Execute npm install in the src/spa-react directory.
      • cd to src/spa-react/devl & execute gulp prod or gulp prd (bypasses tests) or npx gulp prod
      • npm install must also populate the node_modules directory in src/main/resources/META-INF/resources
      • (optional) rm src/spa-react/node_modules (makes a smaller uber jar)
    2. Execute ./gradlew quarkusBuild -Dquarkus.package.type=uber-jar to build the production fat jar.
      • Important When building the Uber jar, set DEFAULT_DB=h2 or mariadb or postgres and USE_HANDICAP=true
  3. Execute java -jar build/dodex-quarkus-3.2.0-runner.jar to startup the production server.

  4. Execute url http://localhost:8088/ddex/index.html or .../ddex/bootstrap.html in a browser. Note: This is a different port and url than development. Also Note; The default database on the backend is "Sqlite3", no further configuation is necessay. Dodex-quarkus also has Postgres/Cubrid/Mariadb/DB2/H2 implementations. See <install directory>/dodex-quarkus/src/main/resources/database_config.json and <install directory>/generate/src/main/resources for configuration.

  5. Swapping among databases; Use environment variable DEFAULT_DB by setting it to either sqlite3 ,postgres, cubrid, mariadb, ibmdb2, h2, cassandra, firebase, neo4j or set the default database in database_config.json.

  6. When Dodex-quarkus is configured for the Cubrid database, the database must be created using UTF-8. For example cubrid createdb dodex en_US.utf8.

  7. The dodex server has an auto user clean up process. See application-conf.json and for configuration. It is turned off by default. Users and messages may be orphaned when clients change a handle when the server is offline.

Important Note: Since building jooq source code, the database configurations from the .../dodex-quarkus/generate project may override the database_configs in the the dodex/spa configurations. When making a change to src/main/resources/database_(spa)_config.json also make the change in generate/src/main/resources

Java Linting with PMD

  • Run gradlew pmdMain and gradlew pmdTest to verify code using a subset of PMD rules in dodexstart.xml
  • Reports can be found in build/reports/pmd

Single Page React Application to demo Development and Integration Testing


  • Executing gradlew quarkusDev defaults to debug mode.
  • Tested with VSCode, the launch.json =
            "type": "java",
            "name": "Debug (Launch) - Dodex",
            "request": "attach",
            "hostName": "localhost",
            "port": 5005

Test Dodex

  1. Make sure the demo dodex-quarkus server is running in development mode.
  2. Test Dodex-mess by entering the URL localhost:8089/test/index.html in a browser.
  3. Ctrl+Double-Click a dial or bottom card to popup the messaging client.
  4. To test the messaging, open up the URL in a different browser and make a connection by Ctrl+Double-Clicking the bottom card. Make sure you create a handle.
  5. Enter a message and click send to test.
  6. For dodex-input Double-Click a dial or bottom card to popup the input dialog. Allows for uploading, editing and removal of private content. Content in JSON can be defined as arrays to make HTML more readable.

Native execution with Graalvm

The quarkus documentation can be found at:

A quick start (Assuming graalvm 21+ is installed and configured with native-image):

The Quarkus Method: Execute gradlew build -Dquarkus.package.type=native. The additional arguments are in (quarkus.native.additional-build-args). The build fails with numerious errors.

The Old Fashion Method: Execute the supplied script - dodexvm17. This will build an executable named dmo.fs.quarkus.Server. This script should work, however it uses the fallback javaVM.

Docker, Podman and Minikube(Kubernetes)

  • Assumes docker, podman and minikube are installed

Building an image and container with docker

  1. cd to the dodex-quarkus install directory

  2. make sure dodex and the spa-react node_modules and application are installed

    • in src/main/resources/META-INF/resources execute npm install
    • in src/spa-react execute npm install
    • startup Quarkus in dev mode - gradlew quarkusDev
    • in src/spa-react/devl execute npx gulp prod or npx gulp prd(does not need dodex-quarkus started)
    • stop the quarkus server - ctrl-c or enter q
    • build the production uber jar - ./gradlew quarkusBuild -Dquarkus.package.type=uber-jar
      • Important When building the Uber jar, set DEFAULT_DB=h2 or mariadb or postgres and USE_HANDICAP=true
    • verify the jar's name - if different than dodex-quarkus-2.1.0-runner.jar, change in ./kube/Dockerfile
  3. execute cp build/dodex-quarkus-2.1.0-runner.jar to ./kube

  4. execute docker build -t dufferdo2/dodex-quarkus:latest -f kube/Dockerfile ./kube

  5. execute docker create -t -p 8088:8088 -p 8071:8071 -p 9901:9901 --name dodex_quarkus dufferdo2/dodex-quarkus

  6. execute docker start dodex_quarkus

  7. use browser to view - http://localhost:8088/handicap.html or http://localhost:8088/ddex or http://localhost:8088/ddex/bootstrap.html, if the spa-react was installed this link should work, http://localhost:8088/dist/react-fusebox/appl/testapp.html

  8. execute docker stop dodex_quarkus

  9. to clean-up execute docker rm dodex_quarkus and docker rmi dodex-quarkus. However you should keep the dufferdo2/dodex-quarkus image if trying out podman or minikube.

  10. to pull and generate a local image from the docker hub, execute docker build -t dodex-quarkus:latest -f kube/quarkus/Dockerfile .

  11. you can also build/run dodex-quarkus(image) and dodex_quarkus(container) with; docker compose -f kube/docker-compose.yaml up -d

  12. Use run to test different databases; docker run --rm -p 8088:8088 -p 8071:8071 -p 9901:9901 -e DEFAULT_DB=postgres -e USE_HANDICAP=true --name dodex_quarkus dufferdo2/dodex-quarkus. To stop, run docker container stop dodex_quarkus.

Note: When running a dufferdo2/dodex-quarkus image, there is no need to have envoy running on the machine. Envoy is included in the image.

Building an image and container with podman

  1. generate an empty pod execute podman pod create -n quarkus-pod -p -p -p 9901:9901
  2. generate a container execute podman create -t --pod quarkus-pod --name quarkus_server dufferdo2/dodex-quarkus:latest.
  3. start the container execute podman start quarkus_server
  4. view in browser
  5. to clean-up execute podman stop quarkus_server, podman rm quarkus_server, podman pod rm quarkus-pod
  6. before cleaning up, you can generate a yaml template. Execute podman generate kube quarkus_pod > quarkus.yaml

Building a deployment, service and persistent volume with minikube

  • Since including the Handicap application(multiple exposed ports, persistent volume) to dodex-quarkus, the minikube deployment must be from configuration files.
  1. execute minikube start
  2. edit kube/quarkus.yml and change env: to desired database(DEFAULT_DB) - defaults to h2(embedded), no database configuration necessary otherwise set DEFAULT_DB to mariadb or postgres
  3. execute kubectl create -f kube/h2-volume.yml
  4. execute kubectl create -f kube/quarkus.yml
  5. execute minikube service quarkus-service to start dodex-quarkus in the default browser - add --url to get just the URL
  6. verify that dodex-quarkus started properly - execute ./execpod and cat ./logs/quarkus.log - enter exit to exit the pod

For postgres make sure postgres.conf has entry:

             listen_addresses = '*'          # what IP address(es) to listen on;

and pg_hba.conf has entry:

             host    all    all    <ip from minikube vertx-service --url>/32   <whatever you use for security> (default for dodex-vertx "password")

and database_config.json(also in ../dodex-vertx/generate...resources/database(_spa)_confg.json) entry: postgres... (both dev/prod)

              "config": {
              "host": "<ip value from `hostname -i`>",

netstat -an |grep 5432 should look like this

             tcp        0      0  *               LISTEN     
             tcp6       0      0 :::5432                 :::*                    LISTEN     
             unix  2      [ ACC ]     STREAM     LISTENING     57905233 /var/run/postgresql/.s.PGSQL.5432
             unix  2      [ ACC ]     STREAM     LISTENING     57905234 /tmp/.s.PGSQL.5432


  1. Make changes to the dodex-quarkus code
  2. execute gradlew clean
  3. build the uber jar and image as described in the Operation and Building an image and container with docker sections, e.g.
    • build the production uber jar - ./gradlew quarkusBuild -Dquarkus.package.type=uber-jar
      • Important When building the Uber jar, set DEFAULT_DB=h2 or mariadb or postgres and USE_HANDICAP=true
      • verify the jar's name - if different than dodex-quarkus-2.1.0-runner.jar, change in ./kube/Dockerfile
    • copy the build/dodex-quarkus-2.1.0-runner.jar to ./kube
    • if the dodex_quarkus and/or the dufferdo2/dodex-quarkus exist, remove them docker rm dodex_quarkus and docker rmi dufferdo2/dodex-quarkus
    • build the image docker build -t dufferdo2/dodex-quarkus:latest -f ./kube/Dockerfile ./kube
  4. execute ./deleteapp
  5. execute minikube image rm dufferdo2/dodex-quarkus
  6. execute minikube load image dufferdo2/qodex-quarkus
  7. execute kubectl create -f kube/quarkus.yml
  8. execute minikube service quarkus-service
  9. clean-up execute ./deleteapp, kubectl delete pvc quarkus-pvc, kubectl delete pv quarkus-pv
  10. execute minikube stop

Exposing the minikube dodex-quarkus container to the internet

  1. cd .../dodex-quarkus and execute npm install - this will install localtunnel

  2. execute minikube service quarkus-service --url to view the local host ip address - can be used for the --local-host value

  3. in separate terminals

    • execute npx localtunnel --host --subdomain my-app --port 30088 --local-host $(minikube service quarkus-service --url | cut -d":" -f2 | cut -d"/" -f3)
    • for the gRPC tunnel, execute npx localtunnel --host --subdomain my-app2 --port 30071 --local-host $(minikube service quarkus-service --url | cut -d":" -f2 | cut -d"/" -f3)
      • the --subdomain for my-app and my-app2 should be changed to unique values
      • the naming convention is required(otherwise edit src/grpc/client/js/client.js and tweak) e.g. coolapp for port 30088 and coolapp2 for port 30071
    • view or in browser

    Note: Make sure your Ad-Blocker is turned off for the web site.


  • Create an account:
  • Getting started:
  • Make sure you create a Service-Account-Key.json file as instructed. Dodex-Vertx uses the environment variable option to set the service-account - GOOGLE_APPLICATION_CREDENTIALS. See as one way to set it.
  • You will need to login to the Firebase console and create the dodex-firebase project. See src/main/java/dmo/fs/router/ for usage of the project-id and Google Credentials. Note: The Firebase rules are not used, so they should be set to allow read, write: if false; which may be the default.
  • You only need the Authentication and Firestore extensions.
  • If you want a different project name, change .firebaserc.
  • Gradle for development can set the GOOGLE_APPLICATION_CREDENTIALS environment variable if you exec gradlew run instead of gradlew quarkusDev. Don't forget to modify the build.gradle file with the location of your Service-Account-Key.json file.

Firebase Testing

  • To make sure your project is created and the setup works, you should run the tests. Note: They are written in Typescript.
  • cd ../dodex-quarkus/src/firebase and run npm install
  • execute npm run emulators to startup the emulators for testing.
  • To test the model and rules after starting the emulators, in a different terminal window, run npm test.


  • See for usage.
  • To use a docker with apoc you can try: Note: this has --privileged set.
    docker run \
    -p 7474:7474 -p 7687:7687 \
    -v $PWD/neo4j/data:/neo4j/data -v $PWD/neo4j/plugins:/neo4j/plugins \
    --name neo4j-apoc \
    --privileged \
    -e 'NEO4J_AUTH=neo4j/secret' \
    -e NEO4J_apoc_export_file_enabled=true \
    -e NEO4J_apoc_import_file_enabled=true \
    -e NEO4J_apoc_import_file_use__neo4j__config=true \
    -e NEO4JLABS_PLUGINS=\[\"apoc\"\] \
    -e NEO4J_dbms_security_procedures_unrestricted=apoc.\\\* \

To restart and stop: docker start neo4j-apoc and docker stop neo4j-apoc

The Neo4j was tested with the apoc install, however the database should work without it.

Simply execute export DEFAULT_DB=neo4j to use, after database setup.

Dodex Monitoring

Getting Started

  • Apache Kafka must be installed.

    • Kafka Quickstart - A container should also work
    • .../config/ should be modified if using a local install
      • advertised.listeners=PLAINTEXT://localhost:9092
      • num.partitions=2 # at least 2
    • local startup
      • ./bin/ config/
      • ./bin/ config/
  • Setup Quarkus for Kafka

    • set environment variable DODEX_KAFKA=true
    • Modify Quarkus file
      • uncomment the mp.messaging entries
      • modify the server entries if necessary
    • startup Quarkus - the monitor should work with any of the databases
    • the monitor configuation can be found in application-conf.json
  • Monitor Dodex

    • in a browser enter localhost:8089/monitor or localhost:8088/monitor in production.
    • as dodex messaging executes the events should be recorded.
    • in the browser's developer tools console execute stop(); and start(); to stop/start the polling. Polling is started by default.

    Note: you can open the messaging dialog with ctrl-doubleclick on the dials

Dodex Groups using OpenAPI

  • A default javascript client is included in .../dodex-quarkus/src/main/resources/static/group/. It can be regenerated in .../dodex-quarkus/handicap/src/grpc/client/ by executing npm run group:prod.
  • The group javascript client is in .../src/grpc/client/js/dodex/groups.js and group.js.
    Note: The client is included in the Handicap application by default.
  • See .../src/main/resources/META-INF/openapi.yaml for OpenAPI declarations. You and view the configuration for development at localhost:8089/q/swagger-ui/.
  • The implementation uses a rest api in the OpenApiRouter class.

Installing in Dodex

  1. Implementing in a javascript module; see .../dodex-quarkus/handicap/src/grpc/client/js/dodex/index.js
    • import { groupListener } from "./groups";
    • in the dodex init configuration, add
    .then(function () {
  2. Implementing with inline html; see .../dodex-quarkus/main/resources/test/index.html
    • <script src="../group/main.min.js"></script>
    • in the dodex init configuration, add
    .then(function () {
  3. Using dodex-messaging group functionality
    Note: Grouping is only used to limit the list of "handles" when sending private messages.
  • Adding a group using @group+<name>
    • select Private Message from the more button dropdown to get the list of handles.
    • enter @group+<name> for example @group+aces
    • select the handles to include and click "Send". Members can be added at any subsequent time.
  • Removing a group using @group-<name>
    • enter @group-<name> for example @group-aces and click "Send". Click the confirmation popup to complete.
  • Removing a member
    • enter @group-<name> for example @group-aces
    • select a "handle" from the dropdown list and click "Send"
  • Selecting a group using @group=<name>
    • enter @group=<name> for example @group=aces and click "Send"
    • Select from reduced set of "handles" to send private message.

Note: By default the entry "dodex.groups.checkForOwner" in application-conf.json is set to false. This means that any "handle" can delete a "group" or "member". Setting the entry to true prevents global administration, however, if the owner "handle" changes, group administration is lost.
Also, Groups will work with "sqlite3" without setting USE_HANDICAP=true. For 'h2', 'mariadb' and 'postgres', USE_HANDICAP=true is required.

Kotlin, gRPC Web Application

  • This web application can be used to maintain golfer played courses and scores and to calculate a handicap index. The application has many moving parts from the envoy proxy server to kotlin, protobuf, gRPC, jooq and code generator, bootstrap, webpack, esbuild, gradle, java and javascript.

    See documentation at:




This project is licensed under the MIT License - see the LICENSE file for details

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