001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.io.hfile.bucket;
019
020import static org.junit.Assert.assertTrue;
021
022import java.io.File;
023import java.io.IOException;
024import java.nio.ByteBuffer;
025import org.apache.hadoop.hbase.HBaseClassTestRule;
026import org.apache.hadoop.hbase.io.hfile.bucket.TestByteBufferIOEngine.BufferGrabbingDeserializer;
027import org.apache.hadoop.hbase.nio.ByteBuff;
028import org.apache.hadoop.hbase.testclassification.IOTests;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.junit.ClassRule;
031import org.junit.Test;
032import org.junit.experimental.categories.Category;
033
034/**
035 * Basic test for {@link FileMmapEngine}
036 */
037@Category({IOTests.class, SmallTests.class})
038public class TestFileMmapEngine {
039
040  @ClassRule
041  public static final HBaseClassTestRule CLASS_RULE =
042      HBaseClassTestRule.forClass(TestFileMmapEngine.class);
043
044  @Test
045  public void testFileMmapEngine() throws IOException {
046    int size = 2 * 1024 * 1024; // 2 MB
047    String filePath = "testFileMmapEngine";
048    try {
049      FileMmapEngine fileMmapEngine = new FileMmapEngine(filePath, size);
050      for (int i = 0; i < 50; i++) {
051        int len = (int) Math.floor(Math.random() * 100);
052        long offset = (long) Math.floor(Math.random() * size % (size - len));
053        byte[] data1 = new byte[len];
054        for (int j = 0; j < data1.length; ++j) {
055          data1[j] = (byte) (Math.random() * 255);
056        }
057        fileMmapEngine.write(ByteBuffer.wrap(data1), offset);
058        BufferGrabbingDeserializer deserializer = new BufferGrabbingDeserializer();
059        fileMmapEngine.read(offset, len, deserializer);
060        ByteBuff data2 = deserializer.getDeserializedByteBuff();
061        for (int j = 0; j < data1.length; ++j) {
062          assertTrue(data1[j] == data2.get(j));
063        }
064      }
065    } finally {
066      File file = new File(filePath);
067      if (file.exists()) {
068        file.delete();
069      }
070    }
071
072  }
073}