mina与spring整合的主要问题就是mina中一些bean的配置需要spring的ioc,我们首先看一个简单的服务端代码:
public void initialize() throws IOException { // Create an Acceptor NioDatagramAcceptor acceptor = new NioDatagramAcceptor(); // Add Handler acceptor.setHandler(new ServerHandler()); acceptor.getFilterChain().addLast("logging", new LoggingFilter()); acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new SNMPCodecFactory())); // Create Session Configuration DatagramSessionConfig dcfg = acceptor.getSessionConfig(); dcfg.setReuseAddress(true); logger.debug("Starting Server......"); // Bind and be ready to listen acceptor.bind(new InetSocketAddress(DEFAULT_PORT)); logger.debug("Server listening on "+DEFAULT_PORT); }整合步骤一般有三步:1、设置io handler 2、创建filters 3、创建socket
spring中设置iohandler:
<!-- The IoHandler implementation --> <bean id="trapHandler" class="com.ashishpaliwal.udp.mina.server.ServerHandler" />Filters:
<bean id="snmpCodecFilter" class="org.apache.mina.filter.codec.ProtocolCodecFilter">
<constructor-arg>
<bean class="com.ashishpaliwal.udp.mina.snmp.SNMPCodecFactory" />
</constructor-arg>
</bean>
<bean id="loggingFilter" class="org.apache.mina.filter.logging.LoggingFilter" />
<!-- The filter chain. -->
<bean id="filterChainBuilder" class="org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder">
<property name="filters">
<map>
<entry key="loggingFilter" value-ref="loggingFilter"/>
<entry key="codecFilter" value-ref="snmpCodecFilter"/>
</map>
</property>
</bean>
我们用的是基于构造方法的注入方式,最后我们注入socket:
<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <property name="customEditors"> <map> <entry key="java.net.SocketAddress"> <bean class="org.apache.mina.integration.beans.InetSocketAddressEditor" /> </entry> </map> </property> </bean> <!-- The IoAcceptor which binds to port 161 --> <bean id="ioAcceptor" class="org.apache.mina.transport.socket.nio.NioDatagramAcceptor" init-method="bind" destroy-method="unbind"> <property name="defaultLocalAddress" value=":161" /> <property name="handler" ref="trapHandler" /> <property name="filterChainBuilder" ref="filterChainBuilder" /> </bean>这样我们可以在spring容器中获得mina的服务器实例了:
public void initializeViaSpring() throws Exception {
new ClassPathXmlApplicationContext("trapReceiverContext.xml");
}