package org.apache.commons.jcs3;
   
   /*
    * 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.
   */
  
  import java.util.Hashtable;
  
  import org.apache.commons.jcs3.access.CacheAccess;
  import org.apache.commons.jcs3.engine.memory.lru.LRUMemoryCache;
  import org.apache.commons.jcs3.log.Log;
  import org.apache.commons.jcs3.log.LogManager;
  
  import junit.framework.TestCase;
  
  /**
   * This test ensures that basic memory operations are with a specified order of magnitude of the
   * java.util.Hashtable.
   * <p>
   * Currently JCS is under 2x a hashtable for gets, and under 1.2x for puts.
   */
  public class JCSvsHashtablePerformanceTest
      extends TestCase
  {
      /** jcs / hashtable */
      float ratioPut;
  
      /** jcs / hashtable */
      float ratioGet;
  
      /** ration goal */
      float target = 3.50f;
  
      /** Times to run the test */
      int loops = 20;
  
      /** how many puts and gets to run */
      int tries = 50000;
  
      /**
       * A unit test for JUnit
       * @throws Exception Description of the Exception
       */
      public void testSimpleLoad()
          throws Exception
      {
          final Log log1 = LogManager.getLog( LRUMemoryCache.class );
          if ( log1.isDebugEnabled() )
          {
              System.out.println( "The log level must be at info or above for the a performance test." );
              return;
          }
          final Log log2 = LogManager.getLog( JCS.class );
          if ( log2.isDebugEnabled() )
          {
              System.out.println( "The log level must be at info or above for the a performance test." );
              return;
          }
          doWork();
          assertTrue( this.ratioPut < target );
          assertTrue( this.ratioGet < target );
      }
  
      /**
       *
       */
      public void doWork()
      {
          long start = 0;
          long end = 0;
          long time = 0;
          float tPer = 0;
  
          long putTotalJCS = 0;
          long getTotalJCS = 0;
          long putTotalHashtable = 0;
          long getTotalHashtable = 0;
  
          try
          {
  
              JCS.setConfigFilename( "/TestJCSvHashtablePerf.ccf" );
              final CacheAccess<String, String> cache = JCS.getInstance( "testCache1" );
  
             for ( int j = 0; j < loops; j++ )
             {
 
                 String name = "JCS      ";
                 start = System.currentTimeMillis();
                 for ( int i = 0; i < tries; i++ )
                 {
                     cache.put( "key:" + i, "data" + i );
                 }
                 end = System.currentTimeMillis();
                 time = end - start;
                 putTotalJCS += time;
                 tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries );
                 System.out.println( name + " put time for " + tries + " = " + time + "; millis per = " + tPer );
 
                 start = System.currentTimeMillis();
                 for ( int i = 0; i < tries; i++ )
                 {
                     cache.get( "key:" + i );
                 }
                 end = System.currentTimeMillis();
                 time = end - start;
                 getTotalJCS += time;
                 tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries );
                 System.out.println( name + " get time for " + tries + " = " + time + "; millis per = " + tPer );
 
                 // /////////////////////////////////////////////////////////////
                 name = "Hashtable";
                 final Hashtable<String, String> cache2 = new Hashtable<>();
                 start = System.currentTimeMillis();
                 for ( int i = 0; i < tries; i++ )
                 {
                     cache2.put( "key:" + i, "data" + i );
                 }
                 end = System.currentTimeMillis();
                 time = end - start;
                 putTotalHashtable += time;
                 tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries );
                 System.out.println( name + " put time for " + tries + " = " + time + "; millis per = " + tPer );
 
                 start = System.currentTimeMillis();
                 for ( int i = 0; i < tries; i++ )
                 {
                     cache2.get( "key:" + i );
                 }
                 end = System.currentTimeMillis();
                 time = end - start;
                 getTotalHashtable += time;
                 tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries );
                 System.out.println( name + " get time for " + tries + " = " + time + "; millis per = " + tPer );
 
                 System.out.println( "\n" );
             }
 
         }
         catch ( final Exception e )
         {
             e.printStackTrace( System.out );
             System.out.println( e );
         }
 
         final long putAvJCS = putTotalJCS / loops;
         final long getAvJCS = getTotalJCS / loops;
         final long putAvHashtable = putTotalHashtable / loops;
         final long getAvHashtable = getTotalHashtable / loops;
 
         System.out.println( "Finished " + loops + " loops of " + tries + " gets and puts" );
 
         System.out.println( "\n" );
         System.out.println( "Put average for JCS       = " + putAvJCS );
         System.out.println( "Put average for Hashtable = " + putAvHashtable );
         ratioPut = Float.intBitsToFloat( (int) putAvJCS ) / Float.intBitsToFloat( (int) putAvHashtable );
         System.out.println( "JCS puts took " + ratioPut + " times the Hashtable, the goal is <" + target + "x" );
 
         System.out.println( "\n" );
         System.out.println( "Get average for JCS       = " + getAvJCS );
         System.out.println( "Get average for Hashtable = " + getAvHashtable );
         ratioGet = Float.intBitsToFloat( (int) getAvJCS ) / Float.intBitsToFloat( (int) getAvHashtable );
         System.out.println( "JCS gets took " + ratioGet + " times the Hashtable, the goal is <" + target + "x" );
     }
 }