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Determine the default allocator from system property

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- Add ByteBufAllocator.DEFAULT
- The default allocator is 'unpooled'
This commit is contained in:
Trustin Lee 2014-02-14 13:03:52 -08:00
parent dd4ed6aa14
commit b18c8fe688
3 changed files with 26 additions and 3 deletions
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2
buffer/src/main/java/io/netty/buffer/ByteBufAllocator.java
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@ -21,6 +21,8 @@ package io.netty.buffer;
*/
public interface ByteBufAllocator {
ByteBufAllocator DEFAULT = ByteBufUtil.DEFAULT_ALLOCATOR;
/**
* Allocate a {@link ByteBuf}. If it is a direct or heap buffer
* depends on the actual implementation.

23
buffer/src/main/java/io/netty/buffer/ByteBufUtil.java
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@ -16,6 +16,9 @@
package io.netty.buffer;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
@ -25,20 +28,40 @@ import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.util.Locale;
/**
* A collection of utility methods that is related with handling {@link ByteBuf}.
*/
public final class ByteBufUtil {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(ByteBufUtil.class);
private static final char[] HEXDUMP_TABLE = new char[256 * 4];
static final ByteBufAllocator DEFAULT_ALLOCATOR;
static {
final char[] DIGITS = "0123456789abcdef".toCharArray();
for (int i = 0; i < 256; i ++) {
HEXDUMP_TABLE[ i << 1 ] = DIGITS[i >>> 4 & 0x0F];
HEXDUMP_TABLE[(i << 1) + 1] = DIGITS[i & 0x0F];
}
String allocType = SystemPropertyUtil.get("io.netty.allocator.type", "pooled").toLowerCase(Locale.US).trim();
ByteBufAllocator alloc;
if ("unpooled".equals(allocType)) {
alloc = UnpooledByteBufAllocator.DEFAULT;
logger.debug("-Dio.netty.allocator.type: {}", allocType);
} else if ("pooled".equals(allocType)) {
alloc = PooledByteBufAllocator.DEFAULT;
logger.debug("-Dio.netty.allocator.type: {}", allocType);
} else {
alloc = UnpooledByteBufAllocator.DEFAULT;
logger.debug("-Dio.netty.allocator.type: unpooled (unknown: {})", allocType);
}
DEFAULT_ALLOCATOR = alloc;
}
/**

4
transport/src/main/java/io/netty/channel/DefaultChannelConfig.java
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@ -16,7 +16,6 @@
package io.netty.channel;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.UnpooledByteBufAllocator;
import io.netty.channel.nio.AbstractNioByteChannel;
import io.netty.channel.socket.SocketChannelConfig;
@ -31,7 +30,6 @@ import static io.netty.channel.ChannelOption.*;
*/
public class DefaultChannelConfig implements ChannelConfig {
private static final ByteBufAllocator DEFAULT_ALLOCATOR = UnpooledByteBufAllocator.DEFAULT;
private static final RecvByteBufAllocator DEFAULT_RCVBUF_ALLOCATOR = AdaptiveRecvByteBufAllocator.DEFAULT;
private static final MessageSizeEstimator DEFAULT_MSG_SIZE_ESTIMATOR = DefaultMessageSizeEstimator.DEFAULT;
@ -39,7 +37,7 @@ public class DefaultChannelConfig implements ChannelConfig {
protected final Channel channel;
private volatile ByteBufAllocator allocator = DEFAULT_ALLOCATOR;
private volatile ByteBufAllocator allocator = ByteBufAllocator.DEFAULT;
private volatile RecvByteBufAllocator rcvBufAllocator = DEFAULT_RCVBUF_ALLOCATOR;
private volatile MessageSizeEstimator msgSizeEstimator = DEFAULT_MSG_SIZE_ESTIMATOR;