]]>
下面q个startҎ(gu)用来初始化MINAQ?/p>
Java代码 
- private void start(int port, WebContext ctx)
- throws IOException, InstantiationException
- , IllegalAccessException, ClassNotFoundException {
- //初始化Acceptor
- NioSocketAcceptor acceptor = new NioSocketAcceptor(5);
- java.util.concurrent.Executor threadPool = Executors.newFixedThreadPool(1500);//建立U程?
- //加入qo(h)器（F(tun)ilterQ到Acceptor
- acceptor.getFilterChain().addLast("exector", new ExecutorFilter(threadPool));
- acceptor.getFilterChain().addLast("codec",
- new ProtocolCodecFilter(new WebDecoder()Q?span class="keyword">new WebEncoder()));
- LoggingFilter filter = new LoggingFilter();
- filter.setExceptionCaughtLogLevel(LogLevel.DEBUG);
- filter.setMessageReceivedLogLevel(LogLevel.DEBUG);
- filter.setMessageSentLogLevel(LogLevel.DEBUG);
- filter.setSessionClosedLogLevel(LogLevel.DEBUG);
- filter.setSessionCreatedLogLevel(LogLevel.DEBUG);
- filter.setSessionIdleLogLevel(LogLevel.DEBUG);
- filter.setSessionOpenedLogLevel(LogLevel.DEBUG);
- acceptor.getFilterChain().addLast("logger", filter);
- acceptor.setReuseAddress(true);//讄的是L务监听的端口可以重用
- acceptor.getSessionConfig().setReuseAddress(true);//讄每一个非ȝ听连接的端口可以重用
- acceptor.getSessionConfig().setReceiveBufferSize(1024);//讄输入~冲区的大小
- acceptor.getSessionConfig().setSendBufferSize(10240);//讄输出~冲区的大小
- //讄为非延迟发送，为true则不l装成大包发送，收到东西马上发出
- acceptor.getSessionConfig().setTcpNoDelay(true);
- //讄L务监听端口的监听队列的最大gؓ(f)100Q如果当前已l有100个连接，再新的连接来被服务器拒l?
- acceptor.setBacklog(100);
- acceptor.setDefaultLocalAddress(new InetSocketAddress(port));
- //加入处理器（HandlerQ到Acceptor
- acceptor.setHandler(new WebHandler());
- acceptor.bind();
- }
NioSocketAcceptor是MINA的适配器，一切都是从q里开始的。MINA中有个过滤器和处理器的概念，qo(h)器用来过滤数据，处理器用来处理数据。具体来说MINA的处理模型就是request->qo(h)器A->qo(h)器B->处理?>qo(h)器B->qo(h)器A->response,q里的request和responsecMserlvet的request和response?/p>
Java代码
- acceptor.getFilterChain().addLast("exector", new ExecutorFilter(threadPool));
- //加入一个线E池到适配器，q里用的是jdk自带的线E池
Java代码
- acceptor.getFilterChain().addLast("codec",
- new ProtocolCodecFilter(new WebDecoder()Q?span class="keyword">new WebEncoder()));
- //q里是处理逻辑的关键部位，h的处理都是在 WebDecodercdW(xu)ebEncodercM处理Q可以明显从命名上看出来一个是用来解码Q另一个是用来~码Qrequetq来后先q入 WebDecoderc?实现?jin)ProtocolDecoder接口)q行解码处理Q这里可以加入自q逻辑把传q来的流解码成自己需要的信息。?WebEncoderc?实现?jin)ProtocolEncoder接口)是进行编码，在这个类里面加入自己的逻辑把处理后的信息组装发送给客户?(response)。而在解码和编码过E中WebHandler(扩展?jin)IoHandlerAdapter抽象c?起到?jin)处理器的作用?
- //request->WebDecoder->WebHandler->WebEncode->response
现在详细描述一下request->WebDecoder->WebHandler->WebEncode->response的过E：(x)
客户端发送一个请求到MINA服务器，q里相当于来?jin)一个requet。请求首先来?/p>
Java代码
- WebDecoderc?实现?jin)ProtocolDecoder接口)中的
- boolean decode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception{}Ҏ(gu)
- /*
- 参数inQ用戯求信息全存在q里Q读数据׃inq里诅R?
- 参数outQ用来输出处理后的数据到Filter的下一个过滤器Q如果没有过滤器?jin)就输出到WebHandlerQ这里有点和
- servelt的过滤器cM。利用out.write(Object object);q个函数可以把数据传C一个Filter。我们可以自己定?
- 一个对象，我们假设为RequestQ用它来传递消息，那末q里可以写成out.write(new RequsetMessage());
- 如果q个Ҏ(gu)q回falseQ就是说当前逻辑包还没接收完Q也是当前的IoBufferq没有包含够的数据Q，需要再?
- 执行decodeҎ(gu)Q再ơ获取新的IoBufferQ，用来获取_的数据。如果返回gؓ(f)truepC可以不执行decode?
- 法了(jin)Q但是要ȀzhandlerҎ(gu)Q必要调用out.writeҎ(gu)?
- public class RequestMessage{}//q里什么也不做
- */
然后?/p>
Java代码
- WebHandler(扩展?jin)IoHandlerAdapter抽象c?中的
- void messageReceived(IoSession session, Object message) throws Exception{}Ҏ(gu)
- WriteFuture future = session.write(response);//session中必d入这个代码，才会(x)ȀzencodeҎ(gu)
- future.addListener(IoFutureListener.CLOSE);//q个的作用是发送完毕后关闭q接Q加?jin)就是短q接Q不然是长连?
- IoFutureListener里面有个operationComplete(IoFuture future)Ҏ(gu)Q当发送完成之后才调用q个Ҏ(gu)?
- /*
- 参数messageQ用来获取Filter传递过来的对象.对应代码RequestMessage request = (RequestMessage) message;
- 参数session:用来发送数据到Filter.对应代码session.write(new ResponseMessage());
- public class ResponseMessage{}//q里什么也不做,假设存放处理后的数据
- 注意Q对于一个MINAE序而言Q对于WebHandlercd生成一个对象，所以要考虑U程安全问题
- */
然后?/p>
Java代码
- WebEncoderc?实现?jin)ProtocolEncoder接口)中的
- boolean encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception{}
- Ҏ(gu)
- /*
- 参数messageQ用来获取上一个Filter节点的数据或者处理器的数据（如果q个qo(h)器ؓ(f)最靠近处理器的那个Q?
- ResponseMessage response = (ResponseMessage)message;
- 参数outQ用来输出数据到下一个Filter节点q或者到客户?用out.write(Object encodedMessage)把数据发?
- 出去Q但是要注意的是Q如果这个Filter下一个节点如果是客户端的话，那个q个encodedMessage数据必须?
- IoBuffercd的，可以利用IoBuffer.wrap(byte[] byteArray)q个Ҏ(gu)来格式化输出数据
- */
]]>
package example.helloword.client;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;public class SendMsgPool
{
private static SendMsgPool sendMsgPool = new SendMsgPool(); private ExecutorService pool; private SendMsgPool()
{
pool = Executors.newFixedThreadPool(3);
} public static SendMsgPool getInstance() { return sendMsgPool; } public Future<String> sendMsg(String local, int port, String msg) { ClinetSocket clientScoket = ClientSocketPool.getInstance() .getClientSocket(local, port); ClientTread ct = new ClientTread(clientScoket, msg); return pool.submit(ct); } public void shutDown() { this.pool.shutdown(); }
}
]]>
]]>
]]>
]]>
]]>
while (true) { try { // 接收数据 datagramSocket.receive(datagramPacket); String instruction = new String(datagramPacket.getData(), 0, datagramPacket.getLength()); System.out.println(instruction); String senddStr = "from remote server: " + instruction; System.out.println("datagramPacket-port: " + datagramPacket.getPort()); System.out.println("datagramPacket-addr: " + datagramPacket.getAddress().getHostAddress()); this.send(datagramPacket.getAddress().getHostAddress(), datagramPacket.getPort(), senddStr); } catch (Exception e) { e.printStackTrace(); } }]]>
public static String[] getAllLocalHostIP() { String[] ret = null; try { String hostName = InetAddress.getLocalHost().getHostName(); if (hostName == null || hostName.length() < 1) { return ret; } InetAddress[] inetAddresses = InetAddress.getAllByName(hostName); if (inetAddresses == null || inetAddresses.length < 1) { return ret; } ret = new String[inetAddresses.length]; for (int i = 0; i < inetAddresses.length; i++) { ret[i] = inetAddresses[i].getHostAddress(); } } catch (Exception ex) { ex.printStackTrace(); } return ret; }]]>