Change the license to GPL v3 to be compatible with Apache License 2.0.

HMCLAPI/src/main/java/rx/concurrency/CurrentThreadScheduler.java

@@ -0,0 +1,71 @@
+/**
+ * Copyright 2013 Netflix, Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package rx.concurrency;
+
+import java.util.LinkedList;
+import java.util.Queue;
+import java.util.concurrent.TimeUnit;
+
+import rx.Subscription;
+import rx.util.functions.Func0;
+
+/**
+ * Schedules work on the current thread but does not execute immediately. Work is put in a queue and executed after the current unit of work is completed.
+ */
+public class CurrentThreadScheduler extends AbstractScheduler {
+    private static final CurrentThreadScheduler INSTANCE = new CurrentThreadScheduler();
+
+    public static CurrentThreadScheduler getInstance() {
+        return INSTANCE;
+    }
+
+    private static final ThreadLocal<Queue<DiscardableAction>> QUEUE = new ThreadLocal<>();
+
+    private CurrentThreadScheduler() {
+    }
+
+    @Override
+    public Subscription schedule(Func0<Subscription> action) {
+        DiscardableAction discardableAction = new DiscardableAction(action);
+        enqueue(discardableAction);
+        return discardableAction;
+    }
+
+    @Override
+    public Subscription schedule(Func0<Subscription> action, long dueTime, TimeUnit unit) {
+        return schedule(new SleepingAction(action, this, dueTime, unit));
+    }
+
+    private void enqueue(DiscardableAction action) {
+        Queue<DiscardableAction> queue = QUEUE.get();
+        boolean exec = queue == null;
+
+        if (exec) {
+            queue = new LinkedList<>();
+            QUEUE.set(queue);
+        }
+
+        queue.add(action);
+
+        if (exec) {
+            while (!queue.isEmpty()) {
+                queue.poll().call();
+            }
+
+            QUEUE.set(null);
+        }
+    }
+}