Github user aweisberg commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/184#discussion_r163084763
--- Diff:
src/java/org/apache/cassandra/net/CompactEndpointSerializationHelper.java ---
@@ -21,28 +21,142 @@
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
+import java.nio.ByteBuffer;
-public class CompactEndpointSerializationHelper
+import org.apache.cassandra.io.IVersionedSerializer;
+import org.apache.cassandra.io.util.DataInputBuffer;
+import org.apache.cassandra.io.util.DataInputPlus;
+import org.apache.cassandra.io.util.DataOutputPlus;
+import org.apache.cassandra.locator.InetAddressAndPort;
+import org.apache.cassandra.streaming.messages.StreamMessage;
+
+/*
+ * As of version 4.0 the endpoint description includes a port number as an
unsigned short
+ */
+public class CompactEndpointSerializationHelper implements
IVersionedSerializer<InetAddressAndPort>
{
- public static void serialize(InetAddress endpoint, DataOutput out)
throws IOException
+ public static final IVersionedSerializer<InetAddressAndPort> instance
= new CompactEndpointSerializationHelper();
+
+ /**
+ * Streaming uses it's own version numbering so we need to map those
versions to the versions used my regular messaging.
+ * There are only two variants of the serialization currently so a
simple mapping around pre vs post 4.0 is fine.
+ */
+ public static final IVersionedSerializer<InetAddressAndPort>
streamingInstance = new IVersionedSerializer<InetAddressAndPort>()
{
- byte[] buf = endpoint.getAddress();
- out.writeByte(buf.length);
- out.write(buf);
+ public void serialize(InetAddressAndPort inetAddressAndPort,
DataOutputPlus out, int version) throws IOException
+ {
+ if (version < StreamMessage.VERSION_40)
+ {
+ instance.serialize(inetAddressAndPort, out,
MessagingService.VERSION_30);
+ }
+ else
+ {
+ instance.serialize(inetAddressAndPort, out,
MessagingService.VERSION_40);
+ }
+ }
+
+ public InetAddressAndPort deserialize(DataInputPlus in, int
version) throws IOException
+ {
+ if (version < StreamMessage.VERSION_40)
+ {
+ return instance.deserialize(in,
MessagingService.VERSION_30);
+ }
+ else
+ {
+ return instance.deserialize(in,
MessagingService.VERSION_40);
+ }
+ }
+
+ public long serializedSize(InetAddressAndPort inetAddressAndPort,
int version)
+ {
+ if (version < StreamMessage.VERSION_40)
+ {
+ return instance.serializedSize(inetAddressAndPort,
MessagingService.VERSION_30);
+ }
+ else
+ {
+ return instance.serializedSize(inetAddressAndPort,
MessagingService.VERSION_40);
+ }
+ }
+ };
+
+ private CompactEndpointSerializationHelper() {}
+
+ public void serialize(InetAddressAndPort endpoint, DataOutputPlus out,
int version) throws IOException
+ {
+ if (version >= MessagingService.VERSION_40)
+ {
+ byte[] buf = endpoint.address.getAddress();
+ out.writeByte(buf.length + 2);
+ out.write(buf);
+ out.writeShort(endpoint.port);
+ }
+ else
+ {
+ byte[] buf = endpoint.address.getAddress();
+ out.writeByte(buf.length);
+ out.write(buf);
+ }
}
- public static InetAddress deserialize(DataInput in) throws IOException
+ public InetAddressAndPort deserialize(DataInputPlus in, int version)
throws IOException
{
- byte[] bytes = new byte[in.readByte()];
- in.readFully(bytes, 0, bytes.length);
- return InetAddress.getByAddress(bytes);
+ int size = in.readByte() & 0xFF;
+ switch(size)
+ {
+ //The original pre-4.0 serialiation of just an address
+ case 4:
+ case 16:
+ {
+ byte[] bytes = new byte[size];
--- End diff --
This allocation is unavoidable. You can't construct an InetAddress without
it.
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