Netty writing a simple chat program (vi)

1. Writing the service side

Server Startup class:"

1  Public classMychatserver {2 3      Public Static voidMain (string[] args)throwsinterruptedexception {4 5 6Eventloopgroup Bossgroup =NewNioeventloopgroup ();7Eventloopgroup Workergroup =NewNioeventloopgroup ();8 9         Try{TenServerbootstrap Serverbootstrap =Newserverbootstrap (); One Serverbootstrap.group (bossgroup,workergroup). AChannel (Nioserversocketchannel.class) -. Childhandler (NewMychatserverinitializer ()); -  theChannelfuture channelfuture = Serverbootstrap.bind (8899). sync (); - Channelfuture.channel (). Closefuture (). sync (); -}finally { - bossgroup.shutdowngracefully (); + workergroup.shutdowngracefully (); -         } +  A  at     } -  -}

Server Initialization class:

1  Public classMychatserverinitializerextendsChannelinitializer<socketchannel> {2 @Override3     protected voidInitchannel (Socketchannel ch)throwsException {4 5Channelpipeline Channelpipeline =ch.pipeline ();6 7Channelpipeline.addlast (NewDelimiterbasedframedecoder (4096, Delimiters.linedelimiter ()));8Channelpipeline.addlast (NewStringdecoder (Charsetutil.utf_8));9Channelpipeline.addlast (NewStringencoder (Charsetutil.utf_8));TenChannelpipeline.addlast (NewMychatserverhandler ()); One  A     } -}

server-side business processing handler: increasing the collection of connection instances Channelgroup

1  Public classMychatserverhandlerextendsSimplechannelinboundhandler<string> {2 3     //Connecting Instance Collections4     Private  StaticChannelgroup Channelgroup =NewDefaultchannelgroup (globaleventexecutor.instance);5 6 7 @Override8     protected voidChannelRead0 (Channelhandlercontext ctx, String msg)throwsException {9 TenChannel Channel =Ctx.channel (); One  AChannelgroup.foreach (CH-A{ -             if(Channel! =ch) { -Ch.writeandflush (channel.remoteaddress () + "send Message" + msg + "\ n"); the}Else{ -Ch.writeandflush ("[Self]" + "\ n"); -             } -         }); +     } -  +  A @Override at      Public voidhandleradded (Channelhandlercontext ctx)throwsException { -  -Channel Channel =Ctx.channel (); -Channelgroup.writeandflush ("[Server]-" + channel.remoteaddress () + "Add \ n"); - Channelgroup.add (channel); -     } in  - @Override to      Public voidHandlerremoved (Channelhandlercontext ctx)throwsException { +  -Channel Channel =Ctx.channel (); theChannelgroup.writeandflush ("[Server-]" + channel.remoteaddress () + "Leave \ n"); *System.out.println ("Channelgroup size" +channelgroup.size ()); $     }Panax Notoginseng  - @Override the      Public voidChannelactive (Channelhandlercontext ctx)throwsException { +Channel Channel =Ctx.channel (); ASystem.out.println (channel.remoteaddress () + "on line \ n"); the     } +  - @Override $      Public voidChannelinactive (Channelhandlercontext ctx)throwsException { $Channel Channel =Ctx.channel (); -System.out.println (channel.remoteaddress () + "downline \ n"); -     } the  - @OverrideWuyi      Public voidExceptioncaught (Channelhandlercontext ctx, throwable cause)throwsException { the cause.printstacktrace (); - ctx.close (); Wu     } -}

2. Writing the Client

Client Startup class:

1  Public classmychatclient {2 3      Public Static voidMain (string[] args)throwsinterruptedexception, IOException {4 5Eventloopgroup Eventloopgroup =NewNioeventloopgroup ();6 7         Try{8Bootstrap Bootstrap =NewBootstrap ();9Bootstrap.group (Eventloopgroup). Channel (Niosocketchannel.class)Ten. Handler (NewMychatclientinitializer ()); One  AChannel channel = Bootstrap.connect ("localhost", 8899). Sync (). Channel (); -  -BufferedReader br =NewBufferedReader (NewInputStreamReader (system.in)); the              for(;;) { -Channel.writeandflush (Br.readline () + "\ r \ n"); -             } -  +}finally { - eventloopgroup.shutdowngracefully (); +         } A  at     } -  -}

Client Initialization class

1  Public classMychatclientinitializerextendsChannelinitializer<socketchannel> {2 @Override3     protected voidInitchannel (Socketchannel ch)throwsException {4 5Channelpipeline Channelpipeline =ch.pipeline ();6 7Channelpipeline.addlast (NewDelimiterbasedframedecoder (4096, Delimiters.linedelimiter ()));8Channelpipeline.addlast (NewStringdecoder (Charsetutil.utf_8));9Channelpipeline.addlast (NewStringencoder (Charsetutil.utf_8));Ten  OneChannelpipeline.addlast (NewMychatclienthandler ());//your own processor. A  -     } -}

Client message receive processing handler:

1  Public class extends Simplechannelinboundhandler<string> {2    @Override     3  protectedvoidthrows  Exception {4        System.out.println ( msg); 5     }6 }

Netty writing a simple chat program (vi)