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(io.netty.channel.nio.NioEventLoopGroup group, Set<InetSocketAddress> 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(io.netty.channel.nio.NioEventLoopGroup group, Set<InetSocketAddress> superPeerAddresses, Duration timeout, InetSocketAddress address)
      Parameters:
      group - the NioEventLoopGroup the underlying tcp client should run on

  • 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