refactor: make Persistence an injectable bean

Author: metacosm

server/src/main/java/net/laprun/sustainability/power/PowerMeasurer.java

@@ -21,6 +21,9 @@ public class PowerMeasurer {
     @Inject
     PowerSensor sensor;
 
+    @Inject
+    Persistence persistence;
+
     @ConfigProperty(name = "net.laprun.sustainability.power.sampling-period", defaultValue = DEFAULT_SAMPLING_PERIOD)
     Duration samplingPeriod;
 
@@ -32,7 +35,7 @@ public Multi<SensorMeasure> stream(String pid) throws Exception {
     }
 
     public void startTrackingApp(String appName, String pid) throws Exception {
-        stream(pid).subscribe().with(m -> Persistence.save(m, appName));
+        stream(pid).subscribe().with(m -> persistence.save(m, appName));
     }
 
     private RegisteredPID track(String pid) throws Exception {

server/src/main/java/net/laprun/sustainability/power/persistence/Persistence.java

@@ -1,14 +1,15 @@
 package net.laprun.sustainability.power.persistence;
 
+import jakarta.enterprise.context.ApplicationScoped;
 import jakarta.transaction.Transactional;
 
 import net.laprun.sustainability.power.SensorMeasure;
 
-public enum Persistence {
-    ;
+@ApplicationScoped
+public class Persistence {
 
     @Transactional
-    public static Measure save(SensorMeasure measure, String appName) {
+    public Measure save(SensorMeasure measure, String appName) {
         final var persisted = new Measure();
         persisted.components = measure.components();
         persisted.appName = appName;