package beans;

import common.*;
import oracle.aurora.jndi.sess_iiop.ServiceCtx;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.http.HttpSessionBindingListener;
import javax.servlet.http.HttpSessionBindingEvent;
import java.util.Hashtable;

public class EmployeeEJBWrapper
             implements HttpSessionBindingListener
{
  public EmployeeEJBWrapper() {}     // no arg bean constructor
  
    private EmployeeHome home = null;
    private EmployeeRemote testBean = null;
    private String empNumber = null; 
    private String serviceURL = null;

  public String doCallEJB(int empno, String inJServer) {
    try {
       if (testBean == null) {
         Context ic = null;
         if (inJServer == null) { // not running in JServer, usual client setup
           Hashtable env = new Hashtable();
           env.put(Context.URL_PKG_PREFIXES, "oracle.aurora.jndi");
           env.put(Context.SECURITY_PRINCIPAL, "scott");
           env.put(Context.SECURITY_CREDENTIALS, "tiger");
           env.put(Context.SECURITY_AUTHENTICATION, ServiceCtx.NON_SSL_LOGIN);
           ic = new InitialContext (env);
           home = (EmployeeHome)ic.lookup (serviceURL + 
                            "/test/EmployeeBean");           
         }
	 else { // in JServer, use simplified and optimized lookup
           ic = new InitialContext();
           home = (EmployeeHome)ic.lookup ("/test/EmployeeBean");
         }
         testBean = home.create();
       }
       Employee empRec = empRec = testBean.query (empno);
       return (empRec.ename + "     $" + empRec.sal);
    } catch (Exception e) { return "Error occurred: " + e;}
  }   

  public void setServiceURL (String serviceURL) {
      this.serviceURL = serviceURL;
  }

  public String getServiceURL () {
     return serviceURL;
  }

  public void setEmpNumber(String empNo) {
      empNumber = empNo;
  }     

  public String getEmpNumber() {
      return empNumber;
  }

  public void valueBound(HttpSessionBindingEvent event) {
    // nothing to do here, EJB will be created when query is submitted
  } 
  
  public synchronized void valueUnbound(HttpSessionBindingEvent event) {
      try {
        testBean.remove();   // destroy the bean instance
      } catch (Exception ignore) {}
      testBean = null;
  }
}