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From ju...@apache.org
Subject svn commit: r1575300 - in /jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats: ./ ClockTest.java
Date Fri, 07 Mar 2014 15:55:20 GMT
Author: jukka
Date: Fri Mar  7 15:55:20 2014
New Revision: 1575300

URL: http://svn.apache.org/r1575300
Log:
OAK-1418: Read performance regression

Add a test case for the new Clock mechanism

Added:
    jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/
    jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java
  (with props)

Added: jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java?rev=1575300&view=auto
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java
(added)
+++ jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java
Fri Mar  7 15:55:20 2014
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.jackrabbit.oak.stats;
+
+import static junit.framework.Assert.assertTrue;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+
+import org.junit.Test;
+
+public class ClockTest {
+
+    @Test
+    public void testClockDrift() throws InterruptedException {
+        ScheduledExecutorService executor =
+                Executors.newSingleThreadScheduledExecutor();
+        try {
+            Clock[] clocks = new Clock[] {
+                    Clock.SIMPLE,
+                    Clock.ACCURATE,
+                    new Clock.Fast(executor)
+            };
+
+            for (Clock clock : clocks) {
+                long drift = clock.getTime() - System.currentTimeMillis();
+                assertTrue(Math.abs(drift) < 20); // Windows can have 15ms gaps
+            }
+
+            Thread.sleep(100);
+
+            for (Clock clock : clocks) {
+                long drift = clock.getTime() - System.currentTimeMillis();
+                assertTrue(Math.abs(drift) < 20);
+            }
+        } finally {
+            executor.shutdown();
+        }
+    }
+
+}
\ No newline at end of file

Propchange: jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/stats/ClockTest.java
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    svn:eol-style = native



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