DMAAP-MR - Merge MR repos

[dmaap/messagerouter/messageservice.git] / src / main / java / org / onap / dmaap / dmf / mr / metrics / publisher / impl / Clock.java

diff --git a/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/Clock.java b/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/Clock.java
new file mode 100644 (file)
index 0000000..ac83a9e
--- /dev/null
+++ b/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/Clock.java
@@ -0,0 +1,74 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  org.onap.dmaap
+ *  ================================================================================
+ *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *  ================================================================================
+ *  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=========================================================
+ *  
+ *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ *  
+ *******************************************************************************/
+package org.onap.dmaap.dmf.mr.metrics.publisher.impl;
+
+/**
+ * 
+ * This class maintains the system clocks
+ * @author nilanjana.maity
+ *
+ */
+public class Clock
+{
+       public synchronized static Clock getIt ()
+       {
+               if ( sfClock == null )
+               {
+                       sfClock = new Clock ();
+               }
+               return sfClock;
+       }
+
+       /**
+        * 
+        * Get the system's current time in milliseconds.
+        * @return the current time
+        * 
+        */
+       public static long now ()
+       {
+               return getIt().nowImpl ();
+       }
+
+       /**
+        * Get current time in milliseconds
+        * @return current time in ms
+        */
+       public long nowImpl ()
+       {
+               return System.currentTimeMillis ();
+       }
+
+       /**
+        * Initialize constructor
+        */
+       public Clock ()
+       {
+       }
+
+       private static Clock sfClock = null;
+
+       public synchronized static void register ( Clock testClock )
+       {
+               sfClock = testClock;
+       }
+}