Virtueller Gesundheitsassistent

Java desktop application that receives binary health predictions via MQTT, stores them in SQLite, computes rolling risk ratios, and visualizes the result in a dashboard with an avatar streaming view.

Features

Swing desktop UI with two tabs:
Avatar Streaming (embedded JCEF browser, default http://localhost)
Dashboard (time series chart + problem level bar)
MQTT client subscriber (tcp://localhost:1883) for prediction events
SQLite persistence (data/health.db)
Rolling ratio evaluation and automatic risk level classification:
NONE for < 0.5
WARNING for >= 0.5
HIGH for >= 0.8
DISASTER for >= 0.9
Writes animation state JSON for Unreal integration
Optional external process startup:
Python MQTT simulator
Unreal/Pixel Streaming scripts
Custom async logger with file output + rotation

Tech Stack

Java 17
Maven
Swing + FlatLaf
JFreeChart
Eclipse Paho MQTT
SQLite JDBC
JCEF (jcefmaven)
JUnit 5 + Mockito (tests)

Runtime Flow

App initializes look and feel and services.
MQTT subscriber listens on topic from config (mqtt.topic).
Incoming JSON payloads are validated in BinaryEventService.
prediction (0/1) is stored in SQLite.
EvaluationService computes ratio over last 20 values.
AppState updates notify UI controllers.
Dashboard chart and status bar refresh.
Animation state file is written for Unreal consumption.

Payload Format

Incoming MQTT payload must be JSON like:

{
  "valid": true,
  "_id": 123,
  "prediction": 0
}

Prerequisites

JDK 17
Maven 3.9+
Local MQTT broker on localhost:1883 (or adjust code/config)
Windows environment if using bundled process scripts/paths
Optional: Python (if MQTT simulator should be auto-started)
Optional: Unreal + Pixel Streaming setup (path-based integration)

Configuration

Main config: src/main/resources/config/application.properties

app.mode: current mode flag (test)
python.path: Python executable for simulator startup
mqtt.topic: subscribed topic (default PREDICTION)
mqtt_sim.enabled: start simulator process on app startup
mqtt_sim.script: simulator script path
unreal.enabled: start Unreal-related processes
unreal.executable: PowerShell script path for Unreal start
unreal.signalling_server.script: signalling server batch path

Logger config: src/main/resources/config/logger.properties

logger.level
logger.file.enabled
logger.file
logger.max.size.mb

Run

1) Start MQTT Broker

Start a broker on localhost:1883 (for example Mosquitto).

2) Start the App

mvn clean compile
mvn org.codehaus.mojo:exec-maven-plugin:3.5.0:java -Dexec.mainClass=vassistent.App

Or run vassistent.App directly from IntelliJ.

3) Send Test Data

Option A: enable simulator in application.properties:

set mqtt_sim.enabled=true
verify python.path and mqtt_sim.script

Option B: publish messages manually to topic PREDICTION.

Tests

Run:

mvn test

Current state in this repository on Java 17:

DataPersistenceServiceTest and StatisticsServiceTest execute.
Mockito-based tests fail because dependency is mockito-all:2.0.2-beta (legacy CGLIB + Java module access issue on modern JDKs).

Project Structure

src/main/java/vassistent
  App.java
  bootstrap/      # wiring, context, shutdown sequencing
  controller/     # Swing controllers
  model/          # state + data types
  service/        # MQTT, DB, stats, evaluation, processes
  ui/             # App window, dashboard, streaming, widgets
  util/           # config + logger

src/main/resources
  config/application.properties
  config/logger.properties
  scripts/mqtt_simulator.py
  scripts/start_avatar.ps1

Important Notes

AnimationFileService currently writes to a hardcoded absolute path:
C:\Users\Student\Documents\Dannick\Prototyp1\Saved\animation.json
Unreal process handling also uses hardcoded PID/script paths.
On app shutdown, data/health.db is deleted by App.deleteDatabase().
The signalling server process startup in ProcessManagerService is prepared but currently not launched (pb.start() commented).

4.2 KiB Raw Blame History