apache mina (異步連接框架)介紹
mina(Multipurpose Infrastructure for Network Applications) 是apache的頂級項目之一,用於構造異步連接的各種網絡應用
二、最簡單的使用實例
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.charset.Charset;
import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IoAcceptor;
import org.apache.mina.common.SimpleByteBufferAllocator;
import org.apache.mina.filter.LoggingFilter;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.nio.SocketAcceptor;
import org.apache.mina.transport.socket.nio.SocketAcceptorConfig;
public class MinaTimeServer {
private static final int PORT = 9123;
public static void main(String[] args) throws IOException {
//設置buffer
ByteBuffer.setUseDirectBuffers(false);
ByteBuffer.setAllocator(new SimpleByteBufferAllocator());
//定義acceptor
IoAcceptor acceptor = new SocketAcceptor();
//定義config
SocketAcceptorConfig cfg = new SocketAcceptorConfig();
//設置config,加入filter
cfg.getSessionConfig().setReuseAddress( true );
cfg.getFilterChain().addLast( "logger", new LoggingFilter() );
cfg.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));
//加入port handler cfg
acceptor.bind( new InetSocketAddress(PORT), new TimeServerHandler(), cfg);
System.out.println("MINA Time server started.");
}
}
對應的handler ,handler的作用是在對應的網事件的處理代碼
import java.util.Date;
import org.apache.mina.common.IdleStatus;
import org.apache.mina.common.IoHandlerAdapter;
import org.apache.mina.common.IoSession;
import org.apache.mina.common.TransportType;
import org.apache.mina.transport.socket.nio.SocketSessionConfig;
public class TimeServerHandler extends IoHandlerAdapter {
public void exceptionCaught(IoSession session, Throwable t) throws Exception {
t.printStackTrace();
session.close();
}
public void messageReceived(IoSession session, Object msg) throws Exception {
String str = msg.toString();
//如果是quit就關閉session退出
if( str.trim().equalsIgnoreCase("quit") ) {
session.close();
return;
}
//否則打印當前日期
Date date = new Date();
session.write( date.toString() );
System.out.println("Message written");
}
public void sessionCreated(IoSession session) throws Exception {
System.out.println("Session created");
if( session.getTransportType() == TransportType.SOCKET )
((SocketSessionConfig) session.getConfig() ).setReceiveBufferSize( 2048 );
session.setIdleTime( IdleStatus.BOTH_IDLE, 10 );
}
}
編譯上邊兩個類(需要加入mina的jar文件),然後運行terminalServer
開始->運行->cmd進入控制檯
telnet 127.0.0.1 9123
輸入hello
得到當前日期
輸入quit關閉session。