use deamon threads

Author: madsodgaard

SwiftKitCore/src/main/java/org/swift/swiftkit/core/SwiftAsync.java

@@ -16,7 +16,22 @@
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
 
 public final class SwiftAsync {
-    public static final ExecutorService SWIFT_ASYNC_EXECUTOR = Executors.newCachedThreadPool();
+
+    private static final ThreadFactory SWIFT_ASYNC_THREAD_FACTORY = new ThreadFactory() {
+        private final AtomicInteger threadNumber = new AtomicInteger(1);
+        private final String namePrefix = "swift-async-pool-";
+
+        @Override
+        public Thread newThread(Runnable r) {
+            Thread t = new Thread(r, namePrefix + threadNumber.getAndIncrement());
+            t.setDaemon(true);
+            return t;
+        }
+    };
+
+    public static final ExecutorService SWIFT_ASYNC_EXECUTOR = Executors.newCachedThreadPool(SWIFT_ASYNC_THREAD_FACTORY);
 }