pricerbean.java

想学习EJB的同学

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package ejb3.day6;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.interceptor.ExcludeClassInterceptors;
import javax.interceptor.ExcludeDefaultInterceptors;
import javax.interceptor.Interceptors;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

/**
 *
 * @author user
 */
@Stateless(mappedName="ejb/pricer")
@EJB(
    name="ejb/taxRateDao",
    beanName="TaxRateDaoBean",
    beanInterface=TaxRateDaoLocal.class
)
@Interceptors(TimerInterceptor.class)
public class PricerBean implements PricerRemote, PricerLocal {
    @EJB(beanName="TaxRateDaoBean")
    private TaxRateDaoLocal taxRateDaoBean;
    private TaxRateDaoLocal taxRateDao;
    /*
     * @Resource
     * private SessionContext sctx;
     */
    
    @PostConstruct
    public void getRate(){
        try {
            Context ctx = new InitialContext();
            taxRateDao = (TaxRateDaoLocal)ctx.lookup("java:comp/env/ejb/taxRateDao");
            //taxRateDao = (TexRateDaoLocal)sctx.lookup("ejb/taxRateDao");
        } catch (NamingException ex) {
            Logger.getLogger(PricerBean.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    
    @ExcludeClassInterceptors
    @ExcludeDefaultInterceptors
    public double getTaxByDI(String province, double cost) {
        return cost * taxRateDaoBean.getTaxRate(province);
    }

    public double getTaxByLookup(String province, double cost) {
        return cost * taxRateDao.getTaxRate(province);
    }

    public void initTaxRate() {
        taxRateDaoBean.doSomeStuff();
    }
   
    
}