perf: run live-event call asynchronously

src/main/java/de/caritas/cob/videoservice/api/service/liveevent/LiveEventNotificationService.java

@@ -7,6 +7,7 @@
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
 import lombok.SneakyThrows;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 /**
@@ -26,6 +27,7 @@ public class LiveEventNotificationService {
    * @param liveEventMessage {@link LiveEventMessage}
    * @param userIds          list of receiver user Ids
    */
+  @Async
   public void sendVideoCallRequestLiveEvent(LiveEventMessage liveEventMessage,
       List<String> userIds) {
     await();

src/main/java/de/caritas/cob/videoservice/config/apiclient/SpringAsyncConfig.java

@@ -0,0 +1,10 @@
+package de.caritas.cob.videoservice.config.apiclient;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@Configuration
+@EnableAsync
+public class SpringAsyncConfig {
+
+}

src/test/java/de/caritas/cob/videoservice/api/service/liveevent/LiveEventNotificationServiceIT.java

@@ -0,0 +1,38 @@
+package de.caritas.cob.videoservice.api.service.liveevent;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import de.caritas.cob.videoservice.liveservice.generated.web.LiveControllerApi;
+import de.caritas.cob.videoservice.liveservice.generated.web.model.LiveEventMessage;
+import java.lang.management.ManagementFactory;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ActiveProfiles;
+
+@SpringBootTest
+@ActiveProfiles("testing")
+@DirtiesContext
+public class LiveEventNotificationServiceIT {
+
+  @Autowired
+  private LiveEventNotificationService underTest;
+
+  @MockBean
+  @Qualifier("liveControllerApi")
+  @SuppressWarnings("unused")
+  private LiveControllerApi liveControllerApi;
+
+  @Test
+  void sendVideoCallRequestLiveEventShouldRunInAnotherThread() {
+    var threadCount = ManagementFactory.getThreadMXBean().getThreadCount();
+
+    underTest.sendVideoCallRequestLiveEvent(new LiveEventMessage(), List.of());
+
+    assertEquals(threadCount + 1, ManagementFactory.getThreadMXBean().getThreadCount());
+  }
+}