利用Apache MINA来传递对象,这对了MINA来说非常容易,并且这也是Java网络编程中很常用的应用。其实对于MINA传递对象来说,如果看过前一篇文章的话,只要在其中做少许改动就可以实现对象传递,但这里考虑到例子的完整性,还是给出了全部代码示例。
首先看两个用来传递的Java对象MyRequestObject和MyResponseObject,很简单只是实现了Serializable接口罢了。
- package com.google.code.garbagecan.minastudy.sample3;
- import java.io.Serializable;
- public class MyRequestObject implements Serializable {
- private static final long serialVersionUID = 1L;
- private String name;
- private String value;
- public MyRequestObject(String name, String value) {
- this.name = name;
- this.value = value;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getValue() {
- return value;
- }
- public void setValue(String value) {
- this.value = value;
- }
- @Override
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append("Request [name: " + name + ", value: " + value + "]");
- return sb.toString();
- }
- }
- package com.google.code.garbagecan.minastudy.sample3;
- import java.io.Serializable;
- public class MyResponseObject implements Serializable {
- private static final long serialVersionUID = 1L;
- private String name;
- private String value;
- public MyResponseObject(String name, String value) {
- this.name = name;
- this.value = value;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getValue() {
- return value;
- }
- public void setValue(String value) {
- this.value = value;
- }
- @Override
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append("Response [name: " + name + ", value: " + value + "]");
- return sb.toString();
- }
- }
看看Server端的代码
- package com.google.code.garbagecan.minastudy.sample3;
- import java.io.IOException;
- import java.net.InetSocketAddress;
- import org.apache.mina.core.service.IoAcceptor;
- import org.apache.mina.core.service.IoHandlerAdapter;
- import org.apache.mina.core.session.IdleStatus;
- import org.apache.mina.core.session.IoSession;
- import org.apache.mina.filter.codec.ProtocolCodecFilter;
- import org.apache.mina.filter.codec.serialization.ObjectSerializationCodecFactory;
- import org.apache.mina.filter.logging.LoggingFilter;
- import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- public class MyServer {
- private static final Logger logger = LoggerFactory.getLogger(MyServer.class);
- public static void main(String[] args) {
- IoAcceptor acceptor = new NioSocketAcceptor();
- acceptor.getFilterChain().addLast("logger", new LoggingFilter());
- acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new ObjectSerializationCodecFactory()));
- acceptor.setHandler(new IoHandlerAdapter() {
- @Override
- public void sessionCreated(IoSession session) throws Exception {
- }
- @Override
- public void sessionOpened(IoSession session) throws Exception {
- }
- @Override
- public void sessionClosed(IoSession session) throws Exception {
- }
- @Override
- public void sessionIdle(IoSession session, IdleStatus status) throws Exception {
- }
- @Override
- public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
- logger.error(cause.getMessage(), cause);
- session.close(true);
- }
- @Override
- public void messageReceived(IoSession session, Object message) throws Exception {
- logger.info("Received " + message);
- MyRequestObject myReqOjb = (MyRequestObject) message;
- MyResponseObject myResObj = new MyResponseObject(myReqOjb.getName(), myReqOjb.getValue());
- session.write(myResObj);
- }
- @Override
- public void messageSent(IoSession session, Object message) throws Exception {
- logger.info("Sent " + message);
- }
- });
- try {
- acceptor.bind(new InetSocketAddress(10000));
- } catch (IOException ex) {
- logger.error(ex.getMessage(), ex);
- }
- }
- }
1. 首先创建I/O Service,这里使用的是NioSocketAcceptor类来创建了一个IoAcceptor实例。
2. 创建I/O Filter Chain,这里使用了两个个IoFilter,一个是LoggingFilter用来记录日志和打印事件消息,另一个是ProtocolCodecFilter实例用来编码数据,这里使用了ObjectSerializationCodecFactory类来序列化或反序列化数据成java对象。
3. 创建I/O Handler,这里主要看一下messageReceived方法,其总接收了MyRequestObject对象,然后又发送了一个MyResponseObject对象给Client端。
4. ***就是让IoAcceptor类实例绑定端口实现监听。
看看Client端的代码
- package com.google.code.garbagecan.minastudy.sample3;
- import java.net.InetSocketAddress;
- import org.apache.mina.core.RuntimeIoException;
- import org.apache.mina.core.future.ConnectFuture;
- import org.apache.mina.core.service.IoConnector;
- import org.apache.mina.core.service.IoHandlerAdapter;
- import org.apache.mina.core.session.IdleStatus;
- import org.apache.mina.core.session.IoSession;
- import org.apache.mina.filter.codec.ProtocolCodecFilter;
- import org.apache.mina.filter.codec.serialization.ObjectSerializationCodecFactory;
- import org.apache.mina.filter.logging.LoggingFilter;
- import org.apache.mina.transport.socket.nio.NioSocketConnector;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- public class MyClient {
- private static final Logger logger = LoggerFactory.getLogger(MyClient.class);
- public static void main(String[] args) {
- IoConnector connector = new NioSocketConnector();
- connector.setConnectTimeoutMillis(10 * 1000);
- connector.getFilterChain().addLast("logger", new LoggingFilter());
- connector.getFilterChain().addLast("codec", new ProtocolCodecFilter(new ObjectSerializationCodecFactory()));
- connector.setHandler(new IoHandlerAdapter() {
- @Override
- public void sessionCreated(IoSession session) throws Exception {
- }
- @Override
- public void sessionOpened(IoSession session) throws Exception {
- MyRequestObject myObj = new MyRequestObject("my name", "my value");
- session.write(myObj);
- }
- @Override
- public void sessionClosed(IoSession session) throws Exception {
- }
- @Override
- public void sessionIdle(IoSession session, IdleStatus status) throws Exception {
- }
- @Override
- public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
- logger.error(cause.getMessage(), cause);
- session.close(true);
- }
- @Override
- public void messageReceived(IoSession session, Object message) throws Exception {
- MyResponseObject myResObj = (MyResponseObject) message;
- logger.info("Received " + myResObj);
- session.close(true);
- }
- @Override
- public void messageSent(IoSession session, Object message) throws Exception {
- logger.info("Sent " + message);
- }
- });
- IoSession session = null;
- try {
- ConnectFuture future = connector.connect(new InetSocketAddress("localhost", 10000));
- future.awaitUninterruptibly();
- session = future.getSession();
- } catch (RuntimeIoException e) {
- logger.error(e.getMessage(), e);
- }
- session.getCloseFuture().awaitUninterruptibly();
- connector.dispose();
- }
- }
1. 首先创建I/O Service,这里使用的是NioSocketConnector类来创建了一个IoConnector实例,并设置连接超时为10秒。
2. 创建I/O Filter Chain,和服务器端同样设置了两个IoFilter,一个是LoggingFilter用来记录日志和打印事件消息,另一个是ProtocolCodecFilter实例用来编码数据,这里也使用了ObjectSerializationCodecFactory类来序列化或反序列化数据成java对象。
3. 创建I/O Handler,主要看一下sessionOpened方法,其中在会话建立事件中发送了MyRequestObject对象,然后在messageReceived方法中又接受了MyResponseObject对象。
4. ***就是IoConnector实例类连接远端的Server。
下面测试一下上面的程序,首先运行MyServer类,然后运行MyClient类,就可以分别在各自的终端上看到事件日志以及发送/接收的对象了。
原文链接:http://blog.csdn.net/kongxx/article/details/7520599
网站栏目:ApacheMINA实战之对象传输
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