simple timer example

initializer/src/main/java/dasniko/keycloak/initializer/timer/TimerInitializerProvider.java

@@ -0,0 +1,35 @@
+package dasniko.keycloak.initializer.timer;
+
+import com.google.auto.service.AutoService;
+import dasniko.keycloak.initializer.InitializerProviderFactory;
+import lombok.extern.slf4j.Slf4j;
+import org.keycloak.Config;
+import org.keycloak.models.KeycloakSessionFactory;
+import org.keycloak.models.utils.KeycloakModelUtils;
+import org.keycloak.timer.TimerProvider;
+
+@Slf4j
+@AutoService(InitializerProviderFactory.class)
+public class TimerInitializerProvider implements InitializerProviderFactory {
+
+	public static final String PROVIDER_ID = "timer";
+
+	private static Long interval;
+
+	@Override
+	public void init(Config.Scope config) {
+		interval = config.getLong("interval", 60000L);
+	}
+	@Override
+	public void postInit(KeycloakSessionFactory factory) {
+		KeycloakModelUtils.runJobInTransaction(factory, session -> {
+			TimerProvider timerProvider = session.getProvider(TimerProvider.class);
+			timerProvider.schedule(() -> log.info("Timer is being executed..."), interval, PROVIDER_ID);
+		});
+	}
+
+	@Override
+	public String getId() {
+		return PROVIDER_ID;
+	}
+}