How do struts manage this

[Peter Bosmans]

I'm playing with a demo running with struts, jboss and a mysql database.
This example extracts data from a database and dump this in a table on 
my browser.
But i don't understand one thing.
In the action method they set an attribute "employees" with the 
collection employees. Which is filled only with the emp_id numbers (see 
employee EJB). In struts-config.xml is "employeeviewsucces" forwarded to 
"employeeviewsucces.jsp".
In employeeviewsucces.jsp they refer to this "employees". How can get 
these logic:iterate the other data from the database. (During debuging i 
found out that the EJB methods were called, but i don't understand who 
and why these methods are called. I see no link between the EJBmethods 
and the jsp calls.
Can somebody give me e little bit more explanation please or a hint 
where i can find more explanation about this.
Thanks in advance.
Peter

Here a snip of  the struts action-code :
.....
  try {
    InitialContext jndiContext = new InitialContext(env);
    Object ref = jndiContext.lookup("Employee");
    EmployeeHome home= 
(EmployeeHome)PortableRemoteObject.narrow(ref,EmployeeHome.class);
    Collection employees = home.findAll();
    session.setAttribute("employees", employees);
    } catch (Exception e) {
    return (mapping.findForward("employeeviewfailure"));
  }
  return (mapping.findForward("employeeviewsuccess"));
}
.....

Here's a the findall method of the Employee EJB
.....
public Collection ejbFindAll() {
  Vector employeeKeys = new Vector();
  String sqlString = "select EMP_ID from EMPLOYEE";
  try {
    Statement s = connection.createStatement();
    ResultSet rs = s.executeQuery(sqlString);
    while (rs.next()) {
      employeeKeys.addElement(new Integer(rs.getInt("EMP_ID")));
    }
   rs.close();
  } catch (SQLException e) {
    System.out.println("An SQL Exception occurred while querying result 
set of employee");
  }
  return employeeKeys;
}
.....

employeeviewsuccess if forwarded to employeeviewsucces.jsp. Here's the 
snip of the code i don't understand.
.....
  <logic:present name="employees" scope="session">
   <logic:iterate id="currentEmployee" name="employees" scope="session">
    <tr>
     <td>
      <bean:write name="currentEmployee" property="employeeid"/>
     </td>
     <td>
      <bean:write name="currentEmployee" property="firstname"/>
     </td>
     <td>
      <bean:write name="currentEmployee" property="lastname"/>
     </td>
     <td>
      <bean:write name="currentEmployee" property="extension"/>
     </td>
     <td>
      <bean:write name="currentEmployee" property="department"/>
     </td>
     <td>
      <bean:write name="currentEmployee" property="city"/>
     </td>
     <td>
      <a href="employeedelete.do?id=<bean:write
       name="currentEmployee" property="employeeid"/>">Delete</a>
     </td>
     <td>
      <a href="employeemodifysetup.do?id=<bean:write
       name="currentEmployee" property="employeeid"/>">Modify</a>
     </td>
    </tr>
   </logic:iterate>
  </logic:present>
.....





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