[jbosscache-commits] JBoss Cache SVN: r6818 - core/trunk/src/test/java/org/jboss/cache/profiling.

[jbosscache-commits at lists.jboss.org]

Author: manik.surtani at jboss.com
Date: 2008-09-30 10:49:46 -0400 (Tue, 30 Sep 2008)
New Revision: 6818

Added:
   core/trunk/src/test/java/org/jboss/cache/profiling/MemConsumptionTest.java
Log:
Mem test

Added: core/trunk/src/test/java/org/jboss/cache/profiling/MemConsumptionTest.java
===================================================================
--- core/trunk/src/test/java/org/jboss/cache/profiling/MemConsumptionTest.java	                        (rev 0)
+++ core/trunk/src/test/java/org/jboss/cache/profiling/MemConsumptionTest.java	2008-09-30 14:49:46 UTC (rev 6818)
@@ -0,0 +1,75 @@
+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2008, Red Hat Middleware LLC, and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.jboss.cache.profiling;
+
+import org.jboss.cache.Cache;
+import org.jboss.cache.DefaultCacheFactory;
+import org.jboss.cache.Fqn;
+import org.jboss.cache.util.TestingUtil;
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.text.NumberFormat;
+import java.util.Random;
+
+ at Test(groups = "profiling")
+public class MemConsumptionTest
+{
+   // adjust the next 3 numbers
+   int numNodes = 1000000;
+   int payloadSize = 20; // bytes
+   int keySize = 10; // bytes
+
+   Random r = new Random();
+
+   public void testMemConsumption() throws IOException
+   {
+      int kBytesCached = (numNodes * (payloadSize + keySize)) / 1024;
+      System.out.println("Bytes to be cached: " + NumberFormat.getIntegerInstance().format(kBytesCached) + " kb");
+
+      Cache<String, String> c = new DefaultCacheFactory<String, String>().createCache(); // default LOCAL cache
+      for (int i = 0; i < numNodes; i++)
+      {
+         c.put(Fqn.fromString("/node" + i), generateRandomString(keySize), generateRandomString(payloadSize));
+      }
+
+      System.out.println("Calling System.gc()");
+      System.gc();  // clear any unnecessary objects
+
+      TestingUtil.sleepThread(1000); // wait for gc
+
+      // wait for manual test exit
+      System.out.println("Cache populated; check mem usage using jconsole, etc.!");
+      System.in.read();
+   }
+
+   private String generateRandomString(int stringSize)
+   {
+      StringBuilder sb = new StringBuilder();
+      for (int i = 0; i < stringSize; i++)
+      {
+         sb.append(r.nextInt(9)); // single digit
+      }
+      assert sb.length() == stringSize;
+      return sb.toString();
+   }
+}