Author: manik.surtani(a)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; + +@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(); + } +}