1 files changed, 87 insertions, 0 deletions
diff --git a/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/ParallelTasks.java b/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/ParallelTasks.java
new file mode 100644
index 0000000..45fdf96
--- /dev/null
+++ b/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/ParallelTasks.java
@@ -0,0 +1,87 @@
+/*
+* ============LICENSE_START=======================================================
+* ONAP : DCAE
+* ================================================================================
+* Copyright 2018 TechMahindra
+*=================================================================================
+* 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.
+* ============LICENSE_END=========================================================
+*/
+package org.onap.universalvesadapter.utils;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * 
+ * Utility class to execute parallel tasks
+ * 
+ * @author kmalbari
+ *
+ */
+public class ParallelTasks
+{
+    private final Collection<Runnable> tasks = new ArrayList<Runnable>();
+
+    public ParallelTasks()
+    {
+    }
+
+    /**
+     * 
+     * Add task to be executed in parallel
+     * 
+     * @param task
+     */
+    public void add(final Runnable task)
+    {
+        tasks.add(task);
+    }
+
+    /**
+     * starts all the added tasks in parallel
+     * 
+     * @throws InterruptedException
+     */
+    public void startParallelTasks() throws InterruptedException
+    {
+        final ExecutorService threads = Executors.newFixedThreadPool(Runtime.getRuntime()
+                .availableProcessors());
+        try
+        {
+            final CountDownLatch latch = new CountDownLatch(tasks.size());
+            for (final Runnable task : tasks)
+                threads.execute(new Runnable() {
+                    public void run()
+                    {
+                        try
+                        {
+                            task.run();
+                        }
+                        finally
+                        {
+                            latch.countDown();
+                        }
+                    }
+                });
+            latch.await();
+        }
+        finally
+        {
+            threads.shutdown();
+        }
+    }
+}
+\ No newline at end of file