Harry Potter Quarkus Demo

The main goal of this demo is to showcase how to use Infinispan client with Quarkus.

Infinispan features that are being used:

Create stores dynamically
Simple get/put operations
Full-text query
Continuous query

Quarkus features:

REST web-service
Web Socket
Task Scheduling
Application properties
Application lifecycle events listeners

The demo is composed by two applications that run independently:

Hogwarts monitoring
Wizards magic

Each application has a dedicated section in this documentation

Before running the demo

Quarkus uses the Infinispan Remote Client ("Hot Rod"). You need to have an Infinispan Server running before you run this demo.

Option 1: Use Docker

docker run -it -p 11222:11222 -e USER="admin" -e PASS="password" infinispan/server

Docker for mac users. There is a known issue to connect with the server using the Hot Rod client. Blog post here. You won’t need to do this in production, but for testing/development purposes, if you want to connect to a Infinispan Server running in a Docker container, create hotrod-client.properties file under src/main/resources/META-INF folder in each application and configure infinispan.client.hotrod.client_intelligence=BASIC

Option 2: Download and run the server

Download the server from here
Unzip the file
Create a user with admin rights from the installation folder: ./bin/cli.sh user create admin -p password
Run a standalone server from the installation folder: ./bin/server.sh

Hogwarts Monitoring

Characters can execute spells, and we want to monitor who is in Hogwarts and performing magic.

A Character has an id, name, biography and type (other, student, teacher, muggle).
A Spell has an id, name and description.
A Spell is performed by a character. This character may or may not be at Hogwarts.

Data loading

DataLoader class loads characters and spells in two separate stores. This is done at startup time

Magic is going on

Hogwarts Magic Creator is going to emulate characters performing some magic. It will randomly pick a character and a spell to perform (if they can)! Characters in Hogwarts are teachers or students.

To disable this service, set create.magic property to false in the application.properties.

Search

A simple REST service is available to query characters by id or perform a full-text search of the name or the biography.

Magic Socket

A socket that performs a Continuous Query making it possible to monitor which characters in Hogwarts are currently performing magic. The continuous query does not have to go to the server and it is all stored in the client application itself. Read more about these queries in the official Infinispan documentation.

Run Hogwarts Monitoring in dev mode

Change into the hogwarts-monitoring directory. To run in development mode, just run mvn clean compile quarkus:dev. This allows for hot swapping the application, so you can tweak parts of it and it will automatically redeploy.

Go to http://localhost:8080 and monitor the magic!

You will be connected to the monitoring socket. The interface displays some links to display a character by id and perform a full-text search.

Build and run the demo with jar

mvn clean package
cd target
java -jar hogwarts-monitoring-runner.jar

Build and run the application in native mode

mvn package -Pnative
cd target
./hogwarts-monitoring-runner

Loaded data

Maven copies hp_characters.csv and hp_spells.csv to the target directory, that’s why it’s easier to run the executables from the target folder. However you can override these files location at runtime.

Running the jar

java -jar  -Dcharacters.filename=/my/path/hp_characters.csv -Dspells.filename=/my/path/hp_spells.csv hogwarts-monitoring-runner.jar

Running the native

./hogwarts-monitoring-runner -Dcharacters.filename=/my/path/hp_characters.csv -Dspells.filename=/my/path/hp_spells.csv

Wizards Magic

The wizards-magic application is a simple web application that allows to put curses on someone!

Run this application as explained above. The application will be available at http://localhost:8082.

A simple form will be displayed. You can add you name, pick a curse and tell which kind of Wizard you are. If the Hogwarts monitoring is running, you should be able to see your curse displayed… If you chose to be a teacher or a student, of course!

Kubernetes

Install and start Minikube

 minikube start --driver=virtualbox --cpus 4 --memory "8192mb"

Create Kubernetes Secret `clients-credentials`

kubectl create secret generic clients-credentials
--from-literal=infinispan-username=admin
--from-literal=infinispan-password=secret

Build and deploy

eval $(minikube -p minikube docker-env)
./mvnw clean package -Dquarkus.kubernetes.deploy=true -DskipTests=true

Install the Infinispan Operator

curl -sL https://github.com/operator-framework/operator-lifecycle-manager/releases/download/v0.19.1/install.sh | bash -s v0.19.1
kubectl create -f https://operatorhub.io/install/infinispan.yaml
kubectl get csv -n operators

Create Infinispan identities secret

kubectl create secret generic --from-file=identities.yaml connect-secret

Deploy infinispan server

kubectl apply -f infinispan.yaml