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CompositeBytebuf.copy() and copy(...) should respect the allocator 

Motivation:

When calling CompositeBytebuf.copy() and copy(...) we currently use Unpooled to allocate the buffer. This is not really correct and may produce more GC then needed. We should use the allocator that was used when creating the CompositeByteBuf to allocate the new buffer which may be for example the PooledByteBufAllocator.

Modifications:

- Use alloc() to allocate the new buffer.
- Add tests
- Fix tests that depend on the copy to be backed by an byte-array without checking hasArray() first.

Result:

Fixes [#7393].
This commit is contained in:
Norman Maurer 2017-11-09 08:48:19 -08:00
parent 188ea59c9d
commit cc069722a2
3 changed files with 48 additions and 15 deletions
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2
buffer/src/main/java/io/netty/buffer/CompositeByteBuf.java
View File

@ -1333,7 +1333,7 @@ public class CompositeByteBuf extends AbstractReferenceCountedByteBuf implements
@Override
public ByteBuf copy(int index, int length) {
checkIndex(index, length);
ByteBuf dst = Unpooled.buffer(length);
ByteBuf dst = allocBuffer(length);
if (length != 0) {
copyTo(index, length, toComponentIndex(index), dst);
}

20
buffer/src/test/java/io/netty/buffer/AbstractCompositeByteBufTest.java
View File

@ -1116,4 +1116,24 @@ public abstract class AbstractCompositeByteBufTest extends AbstractByteBufTest {
assertEquals(0, buffer.refCnt());
}
@Test
public void testAllocatorIsSameWhenCopy() {
testAllocatorIsSameWhenCopy(false);
}
@Test
public void testAllocatorIsSameWhenCopyUsingIndexAndLength() {
testAllocatorIsSameWhenCopy(true);
}
private void testAllocatorIsSameWhenCopy(boolean withIndexAndLength) {
ByteBuf buffer = newBuffer(8);
buffer.writeZero(4);
ByteBuf copy = withIndexAndLength ? buffer.copy(0, 4) : buffer.copy();
assertEquals(buffer, copy);
assertEquals(buffer.isDirect(), copy.isDirect());
assertSame(buffer.alloc(), copy.alloc());
buffer.release();
copy.release();
}
}

41
buffer/src/test/java/io/netty/buffer/ConsolidationTest.java
View File

@ -15,6 +15,7 @@
*/
package io.netty.buffer;
import io.netty.util.CharsetUtil;
import org.junit.Test;
import static io.netty.buffer.Unpooled.*;
@ -26,11 +27,13 @@ import static org.junit.Assert.*;
public class ConsolidationTest {
@Test
public void shouldWrapInSequence() {
ByteBuf currentBuffer = wrappedBuffer(wrappedBuffer("a".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("1".getBytes()), wrappedBuffer("&".getBytes()));
ByteBuf currentBuffer = wrappedBuffer(wrappedBuffer("a".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("1".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
ByteBuf copy = currentBuffer.copy();
String s = new String(copy.array());
String s = copy.toString(CharsetUtil.US_ASCII);
assertEquals("a=1&", s);
currentBuffer.release();
@ -39,23 +42,33 @@ public class ConsolidationTest {
@Test
public void shouldConsolidationInSequence() {
ByteBuf currentBuffer = wrappedBuffer(wrappedBuffer("a".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("1".getBytes()), wrappedBuffer("&".getBytes()));
ByteBuf currentBuffer = wrappedBuffer(wrappedBuffer("a".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("1".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("b".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("2".getBytes()), wrappedBuffer("&".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("b".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("2".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("c".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("3".getBytes()), wrappedBuffer("&".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("c".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("3".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("d".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("4".getBytes()), wrappedBuffer("&".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("d".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("4".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("e".getBytes()), wrappedBuffer("=".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("5".getBytes()), wrappedBuffer("&".getBytes()));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("e".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("=".getBytes(CharsetUtil.US_ASCII)));
currentBuffer = wrappedBuffer(currentBuffer, wrappedBuffer("5".getBytes(CharsetUtil.US_ASCII)),
wrappedBuffer("&".getBytes(CharsetUtil.US_ASCII)));
ByteBuf copy = currentBuffer.copy();
String s = new String(copy.array());
String s = copy.toString(CharsetUtil.US_ASCII);
assertEquals("a=1&b=2&c=3&d=4&e=5&", s);
currentBuffer.release();