5 jndi和interceptor.ppt

Change JNDI for session beans 毛克明 rockmao@live.cn Change Ejb JNDI name. Jboss provide @LocalBinding and @RemoteBinding notes. *.java import org.jboss.ejb3.annotation.RemoteBinding; import org.jboss.ejb3.annotation.LocalBinding; @RemoteBinding(jndiBinding=mao/RemoteMaoBean) @LocalBinding(jndiBinding=mao/LocalMaoBean) *.jsp Mao helloworld = (Mao) ctx.lookup(mao/RemoteMaoBean); Interceptor(拦截器) The interceptor can intercept method call or life cycle event of session bean and message-driven bean. The interceptor can package some commonly used events, which can disparate it from business logic. Once these common events changes, we do not need to change the corresponding business class. The interceptor can be a method in the same bean class or an external class. Example MaoTLocal.java MaoTRemote.java MaoTBean.java MaoTInterceptor.java MaoTLocal.java package com.mao.ejb3; public interface MaoTLocal extends MaoTRemote{ } MaoTRemote.java package com.mao.ejb3; public interface MaoTRemote { public String SayHello(String name); public String Myname(); } MaoTBean.java package com.mao.ejb3.impl; import com.mao.ejb3.*; import javax.ejb.Local; import javax.ejb.Remote; import javax.ejb.Stateless; import javax.interceptor.Interceptors; @Stateless @Remote(MaoTRemote.class) @Local(MaoTLocal.class) @Interceptors(MaoTInterceptor.class) public class MaoTBean implements MaoTRemote, MaoTLocal{ public String SayHello(String name){ return name + say, hi!; } public String Myname(){ return I am rockmao; } } MaoTInterceptor.java package com.mao.ejb3.impl; import javax.interceptor.AroundInvoke; import javax.interceptor.InvocationContext; public class MaoTInterceptor { @AroundInvoke public Object log(InvocationContext ctx) throws Exception{ System.out.println(Hi, interceptor); long start = System.currentTimeMillis(); try{ if(ctx.getMethod().getName().equals(SayHello)){ System.out.println(SayHello is running); } if (ctx.getMethod().getName().equals(Myname)){ System.out.println(Myname