Spring+Mina（六）

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pom.xml引入相应的包

   <!-- apache mina -->        <dependency>            <groupId>org.apache.mina</groupId>            <artifactId>mina-core</artifactId>            <version>${mina.version}</version>        </dependency>        <dependency>            <groupId>org.apache.mina</groupId>            <artifactId>mina-integration-beans</artifactId>            <version>${mina.version}</version>        </dependency>        <dependency>            <groupId>org.apache.mina</groupId>            <artifactId>mina-integration-spring</artifactId>            <version>1.1.7</version>        </dependency>

MINA的配置文件spring-mina.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">        <property name="customEditors">            <map>                <entry key="java.net.SocketAddress" value="org.apache.mina.integration.beans.InetSocketAddressEditor" />            </map>        </property>    </bean>    <!-- the IoFilters -->    <bean id="executorFilter" class="org.apache.mina.filter.executor.ExecutorFilter" />    <bean id="mdcInjectionFilter" class="org.apache.mina.filter.logging.MdcInjectionFilter">        <constructor-arg value="remoteAddress" />    </bean>    <bean id="codecFilter" class="org.apache.mina.filter.codec.ProtocolCodecFilter">        <constructor-arg>            <ref bean="messageCodecFactory" />        </constructor-arg>    </bean>    <bean id="loggingFilter" class="org.apache.mina.filter.logging.LoggingFilter" />    <!-- The non-SSL filter chain. -->    <bean id="filterChainBuilder" class="org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder">        <property name="filters">            <map>                <entry key="executor" value-ref="executorFilter" />                <entry key="mdcInjectionFilter" value-ref="mdcInjectionFilter" />                <entry key="codecFilter" value-ref="codecFilter" />                <entry key="loggingFilter" value-ref="loggingFilter" />            </map>        </property>    </bean>    <!-- The IoAcceptor -->    <bean id="tcpAcceptor" class="org.apache.mina.transport.socket.nio.NioSocketAcceptor"          lazy-init="false" init-method="bind" destroy-method="unbind">        <property name="defaultLocalAddress" value="${socket.tcp.port}" />        <property name="handler" ref="tcpHandler" />        <property name="reuseAddress" value="true" />        <property name="filterChainBuilder" ref="filterChainBuilder" />    </bean>    <bean id="udpAcceptor" class="org.apache.mina.transport.socket.nio.NioDatagramAcceptor"          lazy-init="false" init-method="bind" destroy-method="unbind">        <property name="defaultLocalAddress" value="${socket.udp.port}" />        <property name="handler" ref="udpHandler" />        <property name="filterChainBuilder" ref="filterChainBuilder" />    </bean></beans>

需要注意的是tcp的监听reuserAddress要设置成true，否则可能重启后，端口显示占用。

MessageCodecFactory负责处理发送和接收的ip包，包含解码和编码两部分。

MessageCodecFactory.java

@Component("messageCodecFactory")public class MessageCodecFactory implements ProtocolCodecFactory {    private final MessageEncoder encoder;    private final MessageDecoder decoder;    public MessageCodecFactory() {        encoder = new MessageEncoder();        decoder = new MessageDecoder();    }    @Override    public ProtocolEncoder getEncoder(IoSession session) throws Exception {        return encoder;    }    @Override    public ProtocolDecoder getDecoder(IoSession session) throws Exception {        return decoder;    }}

MessageDecoder.java 处理解码，粘包拆包都在这里面进行。我们简单处理，直接把收到的信息转成字符串。

 protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {        in.order(ByteOrder.LITTLE_ENDIAN);        int length =  in.limit();        byte[] bytes = new byte[length];        in.get(bytes);        String data = new String(bytes, "GBK");        out.write(data);        return true;    }

TcpHandler是具体负责处理消息解析的逻辑块，当发送消息后，messageReceived会响应。

@Service("tcpHandler")public class TcpHandler extends IoHandlerAdapter {    @Override    public void sessionCreated(IoSession session) throws Exception {        //获取请求ip ((InetSocketAddress)session.getRemoteAddress()).getAddress().getHostAddress();    }    @Override    public void sessionOpened(IoSession session) throws Exception {        // Empty handler    }    @Override    public void sessionClosed(IoSession session) throws Exception {        // Empty handler    }    @Override    public void sessionIdle(IoSession session, IdleStatus status) throws Exception {        session.closeOnFlush();        String errorMsg = status.equals(IdleStatus.READER_IDLE) ? "Read idle timeout" : "Write idle timeout";        logger.debug(errorMsg + ", connection closed!");    }    @Override    public void exceptionCaught(IoSession session, Throwable cause) throws Exception {        super.exceptionCaught(session, cause);        session.closeOnFlush();    }    @Override    public void messageReceived(IoSession session, Object message) throws Exception {        final String msg = ((String) message).trim();        if(msg.length() <= 500) {            logger.debug("Receive TCP << " + msg);        }        else {            logger.debug("Receive TCP << " + msg.substring(0, 500) + "...");        }        //具体的处理逻辑放在这        if(out == null) {            session.closeNow(); //关闭连接        }        else {            session.write(out);            logger.debug("Send TCP >> " + out);        }    }}

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