package day06;

import java.util.*;
import javax.naming.*;
import javax.ejb.*;
public class Client {
  public static void main(String[] args) {
    print("Starting Client . . .
");
    Context initialContext = null;
    EnrollmentCartHome enrollmentCartHome = null;
    EnrollmentCart enrollmentCart = null;
    print("Demonstration of a simple client . . . 
");
    try {
       // Looking up the enrollment cart home via JNDI
       initialContext = new InitialContext();
       Object object = initialContext.lookup("day06/EnrollmentCartHome");
       enrollmentCartHome = (EnrollmentCartHome)
        javax.rmi.PortableRemoteObject.narrow(object,
                                      EnrollmentCartHome.class);
       print("Creating an enrollment cart.
");
       enrollmentCart =  (EnrollmentCart) enrollmentCartHome.create();
       String[] courseIds = { "CS101", "CS102", "CS103"};
       print("Adding some courses to our enrollment cart.
");
       enrollmentCart.addCourses(courseIds);
       String[] moreCourseIds = { "CS201", "CS202", "CS203"};
       print("Adding some more courses to our enrollment cart.
");
       enrollmentCart.addCourses(moreCourseIds);
       print("Getting the collection of courses in our enrollment cart.
");
       Collection collection = enrollmentCart.getCourses();
       print("Removing our enrollment cart.
");
       enrollmentCart.remove();

    } catch ( Exception e) {
       e.printStackTrace();
    }


    print("Demonstration of exceptions . . .
");
    try {
       print("Now trying to access enrollment cart that was removed.
");
       String[] courseIds = { "CS501" };
       enrollmentCart.addCourses(courseIds);
    } catch ( Exception e) {
      print("Exception caught while trying to access ");
      print(" enrollment cart that was removed.
");
      print(e.toString());
    }
    print("Demonstration of Activation/Passivation . . .
");
    try {
       EnrollmentCart carts[] = new EnrollmentCart[15];
       for ( int i = 0; i < 15 ; i++ ) {
          print("Creating cart " + i );
          carts[i] = enrollmentCartHome.create();
          String[] courseIds = { "CS601" };
          carts[i].addCourses(courseIds);
          Thread.sleep(1000);
       }
       for(int i = 0; i < 10; i++ ) {
          print("Removing cart" + i );
          carts[i].remove();
       }
    }
    catch(Exception e) {
       e.printStackTrace();
    }
  }
  static void print(String s) {
     System.out.println(s);
  }
}