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jetty-9 fixed ArrayByteBufferPool and added test

This commit is contained in:
Greg Wilkins 2012-08-29 20:16:31 +10:00
parent 6531cbb69c
commit 8c6ad12088
2 changed files with 168 additions and 5 deletions
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26
jetty-io/src/main/java/org/eclipse/jetty/io/ArrayByteBufferPool.java
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@ -21,6 +21,7 @@ package org.eclipse.jetty.io;
import java.nio.ByteBuffer;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ConcurrentMap;
import org.eclipse.jetty.util.BufferUtil;
@ -96,20 +97,35 @@ public class ArrayByteBufferPool implements ByteBufferPool
{
if (size<=_min)
return null;
int b=size/_inc;
int b=(size-1)/_inc;
if (b>=_direct.length)
return null;
return direct?_direct[b]:_indirect[b];
Bucket bucket = direct?_direct[b]:_indirect[b];
return bucket;
}
private static class Bucket
public static class Bucket
{
final int _size;
final Queue<ByteBuffer> _queue= new ConcurrentLinkedQueue<>();
public final int _size;
public final Queue<ByteBuffer> _queue= new ConcurrentLinkedQueue<>();
Bucket(int size)
{
_size=size;
}
@Override
public String toString()
{
return String.format("Bucket@%x{%d,%d}",hashCode(),_size,_queue.size());
}
}
// Package local for testing
Bucket[] bucketsFor(boolean direct)
{
return direct ? _direct : _indirect;
}
}

147
jetty-io/src/test/java/org/eclipse/jetty/io/ArrayByteBufferPoolTest.java Normal file
View File

@ -0,0 +1,147 @@
//
// ========================================================================
// Copyright (c) 1995-2012 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 java.nio.ByteBuffer;
import org.hamcrest.Matchers;
import org.junit.Test;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
public class ArrayByteBufferPoolTest
{
@Test
public void testMinimumRelease() throws Exception
{
ArrayByteBufferPool bufferPool = new ArrayByteBufferPool(10,100,1000);
ArrayByteBufferPool.Bucket[] buckets = bufferPool.bucketsFor(true);
for (int size=1;size<=9;size++)
{
ByteBuffer buffer = bufferPool.acquire(size, true);
assertTrue(buffer.isDirect());
assertEquals(size,buffer.capacity());
for (ArrayByteBufferPool.Bucket bucket : buckets)
assertTrue(bucket._queue.isEmpty());
bufferPool.release(buffer);
for (ArrayByteBufferPool.Bucket bucket : buckets)
assertTrue(bucket._queue.isEmpty());
}
}
@Test
public void testMaxRelease() throws Exception
{
ArrayByteBufferPool bufferPool = new ArrayByteBufferPool(10,100,1000);
ArrayByteBufferPool.Bucket[] buckets = bufferPool.bucketsFor(true);
for (int size=999;size<=1001;size++)
{
bufferPool.clear();
ByteBuffer buffer = bufferPool.acquire(size, true);
assertTrue(buffer.isDirect());
assertThat(buffer.capacity(),greaterThanOrEqualTo(size));
for (ArrayByteBufferPool.Bucket bucket : buckets)
assertTrue(bucket._queue.isEmpty());
bufferPool.release(buffer);
int pooled=0;
for (ArrayByteBufferPool.Bucket bucket : buckets)
{
pooled+=bucket._queue.size();
}
assertEquals(size<=1000,1==pooled);
}
}
@Test
public void testAcquireRelease() throws Exception
{
ArrayByteBufferPool bufferPool = new ArrayByteBufferPool(10,100,1000);
ArrayByteBufferPool.Bucket[] buckets = bufferPool.bucketsFor(true);
for (int size=390;size<=510;size++)
{
bufferPool.clear();
ByteBuffer buffer = bufferPool.acquire(size, true);
assertTrue(buffer.isDirect());
assertThat(buffer.capacity(), greaterThanOrEqualTo(size));
for (ArrayByteBufferPool.Bucket bucket : buckets)
assertTrue(bucket._queue.isEmpty());
bufferPool.release(buffer);
int pooled=0;
for (ArrayByteBufferPool.Bucket bucket : buckets)
{
if (!bucket._queue.isEmpty())
{
pooled+=bucket._queue.size();
assertThat(bucket._size,greaterThanOrEqualTo(size));
assertThat(bucket._size,Matchers.lessThan(size+100));
}
}
assertEquals(1,pooled);
}
}
@Test
public void testAcquireReleaseAcquire() throws Exception
{
ArrayByteBufferPool bufferPool = new ArrayByteBufferPool(10,100,1000);
ArrayByteBufferPool.Bucket[] buckets = bufferPool.bucketsFor(true);
for (int size=390;size<=510;size++)
{
bufferPool.clear();
ByteBuffer buffer1 = bufferPool.acquire(size, true);
bufferPool.release(buffer1);
ByteBuffer buffer2 = bufferPool.acquire(size, true);
bufferPool.release(buffer2);
ByteBuffer buffer3 = bufferPool.acquire(size, false);
bufferPool.release(buffer3);
int pooled=0;
for (ArrayByteBufferPool.Bucket bucket : buckets)
{
if (!bucket._queue.isEmpty())
{
pooled+=bucket._queue.size();
assertThat(bucket._size,greaterThanOrEqualTo(size));
assertThat(bucket._size,Matchers.lessThan(size+100));
}
}
assertEquals(1,pooled);
assertTrue(buffer1==buffer2);
assertTrue(buffer1!=buffer3);
}
}
}