Added DaemonThreadFactory

src/dorkbox/util/DaemonThreadFactory.java

@@ -0,0 +1,80 @@
+package dorkbox.util;
+
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A ThreadFactory instance, where all threads are created with setDaemon(true) and can be assigned a threadgroup and name prefix
+ */
+public
+class DaemonThreadFactory implements ThreadFactory {
+    private final ThreadGroup threadGroup;
+    private final String threadName;
+    private AtomicInteger threadCount = new AtomicInteger(0);
+
+    /**
+     * Creates a new ThreadFactory instance, where all threads are created with setDaemon(true) and are assigned to a current threads
+     * threadgroup with a name prefix "Thread" and thread count ID
+     */
+    public
+    DaemonThreadFactory() {
+        this(null, null);
+    }
+
+    /**
+     * Creates a new ThreadFactory instance, where all threads are created with setDaemon(true) and are assigned to a specific threadgroup
+     * with a name prefix and thread count ID
+     *
+     * @param threadGroup the threadgroup to assign, otherwise null (which will use the current thread's threadGroup)
+     */
+    public
+    DaemonThreadFactory(final ThreadGroup threadGroup) {
+        this(threadGroup, null);
+    }
+
+    /**
+     * Creates a new ThreadFactory instance, where all threads are created with setDaemon(true) and are assigned to a current threads
+     * threadgroup and thread count ID
+     *
+     * @param threadName the name prefix for the thread. null will use the prefix "Thread"
+     */
+    public
+    DaemonThreadFactory(String threadName) {
+        this(null, threadName);
+    }
+
+    /**
+     * Creates a new ThreadFactory instance, where all threads are created with setDaemon(true) and are assigned to a specific threadgroup
+     * with a name prefix and thread count ID
+     *
+     * @param threadGroup the threadgroup to assign, otherwise null (which will use the current thread's threadGroup)
+     * @param threadName the name prefix for the thread. null will use the prefix "Thread"
+     */
+    public
+    DaemonThreadFactory(final ThreadGroup threadGroup, String threadName) {
+        this.threadGroup = threadGroup;
+        this.threadName = threadName;
+    }
+
+    @Override
+    public
+    Thread newThread(Runnable r) {
+        Thread thread;
+        if (threadGroup != null) {
+            thread = new Thread(threadGroup, r);
+        }
+        else {
+            thread = new Thread(r);
+        }
+
+        thread.setDaemon(true);
+
+        if (threadName == null) {
+            thread.setName("Thread-" + threadCount.getAndIncrement());
+        }
+        else {
+            thread.setName(threadName + "-" + threadCount.getAndIncrement());
+        }
+        return thread;
+    }
+}