Added background worker

src/com/imegumii/BackgroundWorker.java

@@ -0,0 +1,69 @@
+package com.imegumii;
+
+import com.sun.jmx.remote.internal.ArrayQueue;
+
+import java.util.ArrayDeque;
+import java.util.Queue;
+
+/**
+ * Created by kenny on 12-6-2017.
+ */
+public class BackgroundWorker implements Runnable{
+
+    public interface Worker {
+        void execute();
+    };
+
+    private Thread t;
+    private boolean running;
+    private Queue<Worker> workers;
+
+    private static BackgroundWorker worker;
+
+    public static BackgroundWorker instance()
+    {
+        if(worker == null)
+            worker = new BackgroundWorker();
+
+        return worker;
+    }
+
+    private BackgroundWorker()
+    {
+        running = true;
+        workers = new ArrayDeque<Worker>();
+
+        t = new Thread(this);
+        t.start();
+    }
+
+    public void addWorker(Worker w)
+    {
+        workers.add(w);
+    }
+
+    public void kill()
+    {
+        running = false;
+    }
+
+    @Override
+    public void run() {
+
+        while(running)
+        {
+            try {
+                Thread.sleep(100);
+            } catch (InterruptedException e) {
+            }
+
+            if(workers.isEmpty())
+                continue;
+
+            Worker current = workers.poll();
+
+            current.execute();
+        }
+
+    }
+}