Apache Mina development manual

Apache Mina development manual

I. Introduction

Apache Mina is a network application framework that simplifies the development of high-performance and highly scalable network applications. Mina provides an abstract event-driven asynchronous API that uses Java NIO to implement various transmission protocols, such as TCP/IP and UDP/IP.

Apache Mina is often used:

1) NIO Framework library

2) Client/Server Communication Framework library

3) network Socket communication library

 

Apache Mina also has many sub-projects:

1) Asyncweb

HTTP server built on the Apache Mina asynchronous framework

2) FtpServer

An FTP server

3) SSHd

A Java library that supports the SSHH Protocol

4) Vysper

One XMPP Server

Apache Mina whitelist Implementation Method

Apache MINA practice

Ii. Download Apache Mina

Download the latest Mina v2.0.8

See: http://mina.apache.org/mina-project/downloads.html

 

Iii. Use Mina to develop the Time Server

It is actually based on the official example and slightly modified, because it is found that the official example is too old and even contains the deprecated method.

 

1. Prerequisites

Apache Mina 2.0.8 Core

JDK 7

SLF4J + LOGBACK

 

2. Project dependency package

Mina-core-2.0.8.jar

Slf4j-api-1.6.6.jar

 

3. Write a Mina-based Time server

Package ch. chiqms. server;

Import java. io. IOException;
Import java.net. InetSocketAddress;
Import java. nio. charset. Charset;
 
Importorg. apache. mina. core. service. IoAcceptor;
Importorg. apache. mina. core. session. IdleStatus;
Importorg. apache. mina. filter. codec. ProtocolCodecFilter;
Importorg. apache. mina. filter. codec. textline. TextLineCodecFactory;
Importorg. apache. mina. filter. logging. LoggingFilter;
Import org. apache. mina. transport. socket. nio. NioSocketAcceptor;
 
Public class MinaTimeServer {
Privatestatic final int PORT = 9123;
Publicstatic void main (String [] args ){
// Listener connection object
Ioacceptpolicceptor = new NioSocketAcceptor ();

// Configure the filter
// The logger filter outputs all information, such as newly created sessions, message receipt, message sending, and session Closure.
// The codec filter converts the data specified by the binary active protocol to the message object. Here, it processes text-based messages.
Acceptor. getFilterChain (). addLast ("logger", new LoggingFilter ());
Acceptor. getFilterChain (). addLast ("codec", new ProtocolCodecFilter (
NewTextLineCodecFactory (Charset. forName ("UTF-8 "))));

//
Acceptor. setHandler (newTimeServerHandler ());

// Set the size of the input buffer and the IDLE of the session.
Acceptor. getSessionConfig (). setReadBufferSize (2048 );
Acceptor. getSessionConfig (). setIdleTime (IdleStatus. BOTH_IDLE, 10 );

Try {
Acceptor. bind (newInetSocketAddress (PORT ));
} Catch (IOException e ){
E. printStackTrace ();
}
}
}

4. Compile the Handler of the Time Service

Package ch. chiqms. server;
 
Import java. text. SimpleDateFormat;
Import java. util. Calendar;
 
Import org. apache. mina. core. service. IoHandlerAdapter;
Importorg. apache. mina. core. session. IdleStatus;
Importorg. apache. mina. core. session. IoSession;
 
Public class TimeServerHandler extendsIoHandlerAdapter {
 
@ Override
Publicvoid exceptionCaught (IoSession session, Throwable cause)
ThrowsException {
Cause. printStackTrace ();
}
 
@ Override
Publicvoid messageReceived (IoSession session, Object message) throws Exception {
Stringstr = message. toString ();
If (str. trim (). inclusignorecase ("quit ")){
Session. close (true );
Return;
}
Calendartime = Calendar. getInstance ();
SimpleDateFormatdf = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss ");
Session. write (df. format (time. getTime ()));
System. out. println ("TimeMessage written ...");
}
 
@ Override
Publicvoid sessionIdle (IoSession session, IdleStatus status) throws Exception {
System. out. println ("IDLE" + session. getIdleCount (status ));
}
 
}

5. Run MinaTimeServer.

 

Enter telnet 127.0.0.1 9123 in the command line.

 

The server output can also be seen:

SLF4J: Failed to load class "org. slf4j. impl. StaticLoggerBinder ".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: Seehttp: // www.slf4j.org/codes.html?staticloggerbinder for further details.
Time Message written...
Time Message written...
Time Message written...

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