Package org.drasyl.handler.remote.tcp

Class TcpClient

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.channel.ChannelDuplexHandler

org.drasyl.handler.remote.tcp.TcpClient

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler, io.netty.channel.ChannelOutboundHandler

public class TcpClient
extends io.netty.channel.ChannelDuplexHandler

This handler monitors how long the node has not received a response from any super peer. If the super peers have not responded for drasyl.remote.tcp-fallback.client.timeout, an attempt is made to connect to drasyl.remote.tcp-fallback.client.address via TCP. If a TCP-based connection can be established, all messages are also sent via TCP. As soon as a super peer responds (again) via UDP, the TCP connection is closed.

This client is used as a last resort when otherwise no connection to a super peer can be established (e.g. because the node operates in a very restrictive network that does not allow UDP-based traffic). In this case, no direct connections to other peers are available and all messages must be relayed through the fallback connection.

This client is only used if the node does not act as a super peer itself.

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor	Description
TcpClient(Set<SocketAddress> superPeerAddresses, Duration timeout, InetSocketAddress address)

Method Summary

Modifier and Type	Method	Description
void	channelActive(io.netty.channel.ChannelHandlerContext ctx)
void	channelInactive(io.netty.channel.ChannelHandlerContext ctx)
void	channelRead(io.netty.channel.ChannelHandlerContext ctx, Object msg)
void	flush(io.netty.channel.ChannelHandlerContext ctx)
void	write(io.netty.channel.ChannelHandlerContext ctx, Object msg, io.netty.channel.ChannelPromise promise)

Methods inherited from class io.netty.channel.ChannelDuplexHandler

bind, close, connect, deregister, disconnect, read

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Constructor Details

TcpClient

public TcpClient(Set<SocketAddress> superPeerAddresses,
 Duration timeout,
 InetSocketAddress address)

Method Details

channelRead

public void channelRead(io.netty.channel.ChannelHandlerContext ctx,
 Object msg)

Specified by:

channelRead in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelRead in class io.netty.channel.ChannelInboundHandlerAdapter

write

public void write(io.netty.channel.ChannelHandlerContext ctx,
 Object msg,
 io.netty.channel.ChannelPromise promise)

Specified by:

write in interface io.netty.channel.ChannelOutboundHandler

Overrides:

write in class io.netty.channel.ChannelDuplexHandler

flush

public void flush(io.netty.channel.ChannelHandlerContext ctx)
           throws Exception

Specified by:

flush in interface io.netty.channel.ChannelOutboundHandler

Overrides:

flush in class io.netty.channel.ChannelDuplexHandler

Throws:

Exception

channelActive

public void channelActive(io.netty.channel.ChannelHandlerContext ctx)

Specified by:

channelActive in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelActive in class io.netty.channel.ChannelInboundHandlerAdapter

channelInactive

public void channelInactive(io.netty.channel.ChannelHandlerContext ctx)

Specified by:

channelInactive in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelInactive in class io.netty.channel.ChannelInboundHandlerAdapter