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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.io;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.nio.ByteBuffer;
import java.util.Queue;
import java.util.concurrent.ConcurrentMap;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.StringUtil;
import org.hamcrest.Matchers;
import org.junit.Test;
public class MappedByteBufferPoolTest
{
@Test
public void testAcquireRelease() throws Exception
{
MappedByteBufferPool bufferPool = new MappedByteBufferPool();
ConcurrentMap<Integer,Queue<ByteBuffer>> buffers = bufferPool.buffersFor(true);
int size = 512;
ByteBuffer buffer = bufferPool.acquire(size, true);
assertTrue(buffer.isDirect());
assertThat(buffer.capacity(), greaterThanOrEqualTo(size));
assertTrue(buffers.isEmpty());
bufferPool.release(buffer);
assertEquals(1, buffers.size());
}
@Test
public void testAcquireReleaseAcquire() throws Exception
{
MappedByteBufferPool bufferPool = new MappedByteBufferPool();
ConcurrentMap<Integer,Queue<ByteBuffer>> buffers = bufferPool.buffersFor(false);
ByteBuffer buffer1 = bufferPool.acquire(512, false);
bufferPool.release(buffer1);
ByteBuffer buffer2 = bufferPool.acquire(512, false);
assertSame(buffer1, buffer2);
bufferPool.release(buffer2);
assertEquals(1, buffers.size());
}
@Test
public void testAcquireReleaseClear() throws Exception
{
MappedByteBufferPool bufferPool = new MappedByteBufferPool();
ConcurrentMap<Integer,Queue<ByteBuffer>> buffers = bufferPool.buffersFor(true);
ByteBuffer buffer = bufferPool.acquire(512, true);
bufferPool.release(buffer);
assertEquals(1, buffers.size());
bufferPool.clear();
assertTrue(buffers.isEmpty());
}
/**
* In a scenario where MappedByteBufferPool is being used improperly, such as releasing a buffer that wasn't created/acquired by the MappedByteBufferPool,
* an assertion is tested for.
*/
@Test
public void testReleaseAssertion() throws Exception
{
int factor = 1024;
MappedByteBufferPool bufferPool = new MappedByteBufferPool(factor);
try
{
// Release a few small non-pool buffers
bufferPool.release(ByteBuffer.wrap(StringUtil.getUtf8Bytes("Hello")));
/* NOTES:
*
* 1) This test will pass on command line maven build, as its surefire setup uses "-ea" already.
* 2) In Eclipse, goto the "Run Configuration" for this test case.
* Select the "Arguments" tab, and make sure "-ea" is present in the text box titled "VM arguments"
*/
fail("Expected java.lang.AssertionError, do you have '-ea' JVM command line option enabled?");
}
catch (java.lang.AssertionError e)
{
// Expected path.
}
}
@Test
public void testTagged()
{
MappedByteBufferPool pool = new MappedByteBufferPool.Tagged();
ByteBuffer buffer = pool.acquire(1024,false);
assertThat(BufferUtil.toDetailString(buffer),containsString("@T00000001"));
buffer = pool.acquire(1024,false);
assertThat(BufferUtil.toDetailString(buffer),containsString("@T00000002"));
}
}
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