gemfire-core/src/test/java/com/gemstone/gemfire/internal/cache/snapshot/GFSnapshotJUnitPerformanceTest.java

/*=========================================================================
 * Copyright (c) 2010-2014 Pivotal Software, Inc. All Rights Reserved.
 * This product is protected by U.S. and international copyright
 * and intellectual property laws. Pivotal products are covered by
 * one or more patents listed at http://www.pivotal.io/patents.
 *=========================================================================
 */
package com.gemstone.gemfire.internal.cache.snapshot;

import java.io.File;
import java.io.IOException;
import java.util.Map.Entry;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import static org.junit.Assert.*;

import junit.framework.TestCase;

import com.gemstone.gemfire.cache.snapshot.SnapshotIterator;
import com.gemstone.gemfire.internal.cache.snapshot.GFSnapshot.GFSnapshotExporter;
import com.gemstone.gemfire.internal.cache.snapshot.GFSnapshot.GFSnapshotImporter;
import com.gemstone.gemfire.internal.cache.snapshot.GFSnapshot.SnapshotWriter;
import com.gemstone.gemfire.internal.cache.snapshot.SnapshotPacket.SnapshotRecord;
import com.gemstone.gemfire.test.junit.categories.IntegrationTest;
import com.gemstone.gemfire.test.junit.categories.PerformanceTest;

@Category(IntegrationTest.class)
public class GFSnapshotJUnitPerformanceTest {
  private final File f = new File("test.snapshot");
  private static final String val = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";

  @Test
  public void testStreamWritePerformance() throws IOException {
    int i = 0;
    while (i++ < 10) {
      long start = System.currentTimeMillis();
      int count = 100000;
      
      writeFile(count, val);
      
      long elapsed = System.currentTimeMillis() - start;
      double rate = 1000.0 * count / elapsed;
  
      System.out.println(rate + " stream write operations / sec");
    }
  }

  @Test
  public void testWritePerformance() throws IOException {
    int j = 0;
    while (j++ < 10) {
      long start = System.currentTimeMillis();
      int count = 100000;
      
      String s = val;
      SnapshotWriter ss = GFSnapshot.create(f, "test");
      try {
        for (int i = 0; i < count; i++) {
          ss.snapshotEntry(new SnapshotRecord(i, s));
        }
      } finally {
        ss.snapshotComplete();
      }
      
      long elapsed = System.currentTimeMillis() - start;
      double rate = 1000.0 * count / elapsed;
  
      System.out.println(rate + " write operations / sec");
    }
  }
  
  @Test
  public void testStreamReadPerformance() throws IOException,
      ClassNotFoundException {
    writeFile(100000, val);
    
    int i = 0;
    while (i++ < 10) {
      long start = System.currentTimeMillis();
      int count = 0;
  
      GFSnapshotImporter in = new GFSnapshotImporter(f);
      
      SnapshotRecord entry;
      while ((entry = in.readSnapshotRecord()) != null) {
        count++;
      }
      in.close();
      
      long elapsed = System.currentTimeMillis() - start;
      double rate = 1000.0 * count / elapsed;
  
      System.out.println(rate + " stream read operations / sec");
    }
  }
  
  @Test
  public void testCopyPerformance() throws IOException, ClassNotFoundException {
    int count = 100000;
    for (int i = 0; i < 10; i++) {
      writeFile(count, val);

      File tmp = File.createTempFile("snapshot-copy", null);
      tmp.deleteOnExit();
      
      final SnapshotWriter writer = GFSnapshot.create(tmp, "test");
      
      long start = System.currentTimeMillis();
      SnapshotIterator<Integer, String> iter = GFSnapshot.read(f);
      try {
        while (iter.hasNext()) {
          Entry<Integer, String> entry = iter.next();
          writer.snapshotEntry(new SnapshotRecord(null, entry));
        }
        writer.snapshotComplete();
        
        long elapsed = System.currentTimeMillis() - start;
        double rate = 1.0 * count / elapsed;
        
        System.out.println("rate = " + rate + " entries / ms");
      } finally {
        iter.close();
      }
    }
  }

  private void writeFile(int count, String s) throws IOException {
    GFSnapshotExporter out = new GFSnapshotExporter(f, "test");

    try {
      for (int i = 0; i < count; i++) {
        out.writeSnapshotEntry(new SnapshotRecord(i, s));
      }
    } finally {
      out.close();
    }
  }
  
  @After
  public void tearDown() throws Exception {
    if (f.exists()) {
      f.delete();
    }
  }
}