5577l6

Listing 6. UseBook.java

package il.co.lerner.book;

/* Import our entity bean */
import il.co.lerner.book.Book;
import il.co.lerner.book.BookHome;

/* Import the RMI and JDNI items we need */
import javax.rmi.PortableRemoteObject;
import javax.naming.InitialContext;
import java.util.Properties;
import java.util.Collection;
import java.util.Iterator;
import java.io.FileInputStream;

/* This application demonstrates how we can INSERT, UPDATE, and SELECT
   information from a database table using EJB's objects instead of
   SQL. */

public class UseBook
{
    public static void main(String[] args)
    {

	final int testPrimaryKey = 11;

	try
	    {
		System.out.println("(UseBook) About to get an InitialContext");
		
		// Get a naming context
		InitialContext jndiContext = new InitialContext();

		System.out.println("(UseBook) About to invoke jndiContext.lookup()");
		
		// Get a reference to a Book Bean
		Object ref = jndiContext.lookup("Book");

		System.out.println("(UseBook) About to use the reference from JNDI");
		// Get a reference from this to the Bean's Home interface
		BookHome home =
		    (BookHome) PortableRemoteObject.narrow (ref,
							    BookHome.class);

		System.out.println("(UseBook) About to create a new book");

		Book book = home.create(testPrimaryKey, "Book title",
					"AuthorFirst AuthorLast",
					"PublisherName", 10.50);


		System.out.println("(UseBook) Successfully added!");

		String title = book.getTitle();
		String author = book.getAuthor();
		
		System.out.println("(UseBook) The title is '"+ title + "' and the author is '" + author + "'");

		// Now let's change the information
		book.setTitle("New title");
		book.setAuthor("New author");
		
		// Let's retrieve and double-check the information
		String checkTitle = book.getTitle();
		String checkAuthor = book.getAuthor();
		
		System.out.println("(UseBook) After changes, the title is '"+ checkTitle + "' and the author is '" + checkAuthor + "'");

		// Now let's get all of the books
		Collection bookCollection = home.findAll();
		Iterator bookIterator = bookCollection.iterator();

		while (bookIterator.hasNext())
		    {
			Book aBook = (Book) bookIterator.next();
		System.out.println("(UseBook) Retrieved book has id '"+ aBook.getId() + "', title '"+ aBook.getTitle() + "' and an author of '" + aBook.getAuthor() + "'");
		    }
	    }
	catch(Exception e)
	    {
		System.out.println(e.toString());
	    }
    }
}