loanratesbean.java

精通EJB3.0一书的全部随书实例的源代码。

package examples;

import javax.ejb.CreateException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class LoanRatesBean implements SessionBean {
  
     private SessionContext ctx;

     public void ejbCreate () throws CreateException {    
     }

     public void ejbRemove() {
     }
  
     public void ejbActivate() {
     }

     public void ejbPassivate() {
     }

     public void setSessionContext(SessionContext ctx) {  
          this.ctx = ctx;
     }
 
     public float getHomeEquityRate() {
          float retVal=0;

          System.out.println("LoanRatesBean.getHomeEquityRate() called");

          InitialContext initCtx = null;

          try {
               initCtx = new InitialContext();
               javax.resource.cci.ConnectionFactory connFactory = (javax.resource.cci.ConnectionFactory)
                    initCtx.lookup("java:comp/env/eis/LoanAppAdapter");

               javax.resource.cci.Connection myCon = connFactory.getConnection();
               javax.resource.cci.Interaction interaction = myCon.createInteraction();
               javax.resource.cci.MappedRecord recordIn = connFactory.getRecordFactory().createMappedRecord("");

               recordIn.put("HomeEquityRate","");

               javax.resource.cci.MappedRecord recordOut = 
                    (javax.resource.cci.MappedRecord)interaction.execute(null, (javax.resource.cci.Record)recordIn);

               myCon.close();

               Object result = recordOut.get("HomeEquityRate");
               retVal = ((Float)result).floatValue();

          } catch(Exception e) {

               e.printStackTrace();
          }

          return retVal;
     }  
}