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;
019
020import static org.junit.Assert.assertEquals;
021
022import java.nio.ByteBuffer;
023import org.apache.hadoop.hbase.HBaseClassTestRule;
024import org.apache.hadoop.hbase.testclassification.IOTests;
025import org.apache.hadoop.hbase.testclassification.SmallTests;
026import org.junit.ClassRule;
027import org.junit.Test;
028import org.junit.experimental.categories.Category;
029
030@Category({ IOTests.class, SmallTests.class })
031public class TestByteBufferPool {
032
033  @ClassRule
034  public static final HBaseClassTestRule CLASS_RULE =
035      HBaseClassTestRule.forClass(TestByteBufferPool.class);
036
037  @Test
038  public void testOffheapBBPool() throws Exception {
039    boolean directByteBuffer = true;
040    testBBPool(10, 100, directByteBuffer);
041  }
042
043  @Test
044  public void testOnheapBBPool() throws Exception {
045    boolean directByteBuffer = false;
046    testBBPool(10, 100, directByteBuffer);
047  }
048
049  private void testBBPool(int maxPoolSize, int bufferSize, boolean directByteBuffer) {
050    ByteBufferPool pool = new ByteBufferPool(bufferSize, maxPoolSize, directByteBuffer);
051    for (int i = 0; i < maxPoolSize; i++) {
052      ByteBuffer buffer = pool.getBuffer();
053      assertEquals(0, buffer.position());
054      assertEquals(bufferSize, buffer.limit());
055      assertEquals(directByteBuffer, buffer.isDirect());
056    }
057    assertEquals(0, pool.getQueueSize());
058    ByteBuffer bb = directByteBuffer ? ByteBuffer.allocate(bufferSize)
059        : ByteBuffer.allocateDirect(bufferSize);
060    pool.putbackBuffer(bb);
061    assertEquals(0, pool.getQueueSize());
062    bb = directByteBuffer ? ByteBuffer.allocateDirect(bufferSize + 1)
063        : ByteBuffer.allocate(bufferSize + 1);
064    pool.putbackBuffer(bb);
065    assertEquals(0, pool.getQueueSize());
066  }
067}