org.apache.cassandra.net

Class OutboundConnectionInitiator<SuccessType extends OutboundConnectionInitiator.Result.Success>

java.lang.Object

org.apache.cassandra.net.OutboundConnectionInitiator<SuccessType>

public class OutboundConnectionInitiator<SuccessType extends OutboundConnectionInitiator.Result.Success>
extends java.lang.Object

A ChannelHandler to execute the send-side of the internode handshake protocol. As soon as the handler is added to the channel via ChannelInboundHandler.channelActive(ChannelHandlerContext) (which is only invoked if the underlying TCP connection was properly established), the HandshakeProtocol.Initiate handshake is sent. See HandshakeProtocol for full details.

Upon completion of the handshake (on success or fail), the resultPromise is completed. See OutboundConnectionInitiator.Result for details about the different result states.

This class extends ByteToMessageDecoder, which is a ChannelInboundHandler, because this handler waits for the peer's handshake response (the HandshakeProtocol.Accept of the internode messaging handshake protocol).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OutboundConnectionInitiator.Result<SuccessType extends OutboundConnectionInitiator.Result.Success> The result of the handshake.

Method Summary

Modifier and Type	Method and Description
static io.netty.util.concurrent.Future<OutboundConnectionInitiator.Result<OutboundConnectionInitiator.Result.StreamingSuccess>>	initiateStreaming(io.netty.channel.EventLoop eventLoop, OutboundConnectionSettings settings, int requestMessagingVersion) Initiate a connection with the requested messaging version.

Methods inherited from class java.lang.Object

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

Method Detail

initiateStreaming

public static io.netty.util.concurrent.Future<OutboundConnectionInitiator.Result<OutboundConnectionInitiator.Result.StreamingSuccess>> initiateStreaming(io.netty.channel.EventLoop eventLoop,
                                                                                                                                                         OutboundConnectionSettings settings,
                                                                                                                                                         int requestMessagingVersion)

Initiate a connection with the requested messaging version. if the other node supports a newer version, or doesn't support this version, we will fail to connect and try again with the version they reported The returned Future is guaranteed to be completed on the supplied eventLoop.