Problem 1
Fill in the blanks in each of the following statements: a) A three-ticr, distributed Web application consists of _______,________and _________ tier. b) The _______ is the default document sent as the response to a client when the client initially interacts with a J2EE application. c) The ______ enables Enterprise Java application components to access information and resources (such as databases) that are external to an application. d) An ________ object provides access to the application’s naming environment. e) A RequestDispatcher object can _____ requests to other resources or _______ other resources as part of the current servlet’s response. f) Sun’s _________ provides XML and XSL capabilities in a Java program. g) Method _____ of interface _______ discards the session object for the current client. h) The _______for an application is the part of the URL that enables the server to deter- mine which application to execute when the server receives a request from a client. i) An Enterprise Java application container must provide a ______ that implements JNDI and enables the components executing in that container to perform name lookups to locate resources. j) The J2EE reference implementation comes with a graphical application, called the ________ that helps you deploy Enterprise Java applications.
Problem 2
State whether each of the following is true or false. If false, explain why. a) The J2EE server uses port 8080 to await client requests. b) When deploying applications with the \(\mathrm{J} 2 \mathrm{EE}\) server, you can launch the Cloudscape and J2EE servers in any order. c) Initialcontext method 1ookup locates a resource with a JNDI name. d) Method lookup returns a connection object representing the connection to the database. e) The Java 2 Enterprise Edition 1.2.1 reference implementation includes the Apache Tomcat JSP and servlet container. P When RequestDispatcher method forward is called, processing of the request by the current servlet is temporarily suspended to wait for a response from the resource to which the request is forwarded. g) Both the ServletRequest and the Servletcontext getRequestDispatchex methods throw exceptions if the argument to getRequest Dispatcher is not a servlet. h) Each resource reference has a corresponding JNDI name that is used by the deployment tool to register the resource with the Java Naming and Directory Service. i) If you do not configure your data sources and other resources before deploying an Enterprise Java application, the \(\mathrm{J} 2 \mathrm{EE}\) server will search the application to determine the resources used and register those resources with the naming server. j) Not including the full package directory structure for a class in a package will prevent the application from loading the class and from executing properly.
Problem 3
Modify the bookstore case study to cnable the client to change the quantity of an item currently in the shopping cart. In viewCart. jsp, display the quantity in an input element of type text in a form. Provide the user with a submit button with the value Update Cart that enables the user to submit the form to a servlet that updates the quantity of the items in the cart. The servlet should forward the request to viewCart. \(j\) sp, so the user can see the updated cart contents. Redeploy the bookstore application, and test the update capability.
Problem 6
Create an order table and an orderItems table in the books database to storc orders placed by customers. The order table should store an orderID, an orderDate and the email address of the customer who placed the order. [Note: You will need to modify the form in Exercise 11.6 to include the customer's e-mail address]. The order Items table should store the orderID, ISBN, price and quantity of cach book in the order. Modify process.jsp so that it stores the order information in the order and orderttems tables.
