org.apache.cassandra.streaming.messages

Class StreamMessage

java.lang.Object

org.apache.cassandra.streaming.messages.StreamMessage

Direct Known Subclasses:

CompleteMessage, FileMessage, PrepareMessage, ReceivedMessage, RetryMessage, SessionFailedMessage

public abstract class StreamMessage
extends java.lang.Object

StreamMessage is an abstract base class that every messages in streaming protocol inherit. Every message carries message type(StreamMessage.Type) and streaming protocol version byte.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	StreamMessage.Serializer<V extends StreamMessage> StreamMessage serializer
static class	StreamMessage.Type StreamMessage types

Field Summary

Fields

Modifier and Type	Field and Description
static int	CURRENT_VERSION Streaming protocol version
StreamMessage.Type	type

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StreamMessage(StreamMessage.Type type)

Method Summary

Methods

Modifier and Type	Method and Description
static StreamMessage	deserialize(java.nio.channels.ReadableByteChannel in, int version, StreamSession session)
int	getPriority()
static void	serialize(StreamMessage message, java.nio.channels.WritableByteChannel out, int version, StreamSession session)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CURRENT_VERSION

public static final int CURRENT_VERSION

Streaming protocol version

See Also:

Constant Field Values

type

public final StreamMessage.Type type

Constructor Detail

StreamMessage

protected StreamMessage(StreamMessage.Type type)

Method Detail

serialize

public static void serialize(StreamMessage message,
             java.nio.channels.WritableByteChannel out,
             int version,
             StreamSession session)
                      throws java.io.IOException

Throws:

java.io.IOException

deserialize

public static StreamMessage deserialize(java.nio.channels.ReadableByteChannel in,
                        int version,
                        StreamSession session)
                                 throws java.io.IOException

Throws:

java.io.IOException

getPriority

public int getPriority()

Returns:

priority of this message. higher value, higher priority.