use CompletableFuture.runAsync()

Author: Vladimir Kotal

opengrok-web/src/main/java/org/opengrok/web/api/v1/controller/ProjectsController.java

@@ -34,6 +34,7 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
+import java.util.concurrent.CompletableFuture;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
@@ -206,7 +207,7 @@ public void deleteProjectData(@PathParam("project") String projectNameParam) {
         deleteHistoryCache(projectName);
 
         // Delete suggester data.
-        new Thread(() -> suggester.delete(projectName)).start();
+        CompletableFuture.runAsync(() -> suggester.delete(projectName));
     }
 
     @DELETE
@@ -273,7 +274,7 @@ public void markIndexed(@PathParam("project") String projectNameParam) throws Ex
             }
         }
 
-        new Thread(() -> suggester.rebuild(projectName)).start();
+        CompletableFuture.runAsync(() -> suggester.rebuild(projectName));
 
         // In case this project has just been incrementally indexed,
         // its IndexSearcher needs a poke.

opengrok-web/src/main/java/org/opengrok/web/api/v1/controller/SuggesterController.java

@@ -69,6 +69,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.concurrent.CompletableFuture;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
@@ -173,13 +174,13 @@ public SuggesterConfig getConfig() {
     @PUT
     @Path("/rebuild")
     public void rebuild() {
-        new Thread(() -> suggester.rebuild()).start();
+        CompletableFuture.runAsync(() -> suggester.rebuild());
     }
 
     @PUT
     @Path("/rebuild/{project}")
     public void rebuild(@PathParam("project") final String project) {
-        new Thread(() -> suggester.rebuild(project)).start();
+        CompletableFuture.runAsync(() -> suggester.rebuild(project));
     }
 
     /**