HW3

Homework assignment - HW#3A (Estimate time: 3-6 hours)

Objectives

Getting exposed to a bit more sophisticated Web application in which the following features of servlets are used

Multiple servlets are used
A servlet (BannerServlet through /banner) is "included" via RequestDispatcher
Servlet filters are used
Listener is used
JDBC is used to access database table

Building and deploying a more advanced Servlet based Web application, bookstore1 of J2EE 1.4 tutorial. The J2EE 1.4 tutorial shows you how to build the same "Duke's Bookstore" sample application using different Web-tier technologies as mentioned below. In this exercise, you will build bookstore1 using Servlets only.

bookstore1 - using Servlets only
bookstore2 - using JSP pages only
bookstore3 - using JSP pages and custom tags
bookstore4 - using JSP pages and JSTL in native format
bookstore5 - using JSP pages and JSTL in XML format
bookstore6 - using JavaServer Faces (JSF)

Task1 - Build and run bookstore1

Build and run "Duke's Bookstore application" bookstore1 example code as described in "The Examples Servlets section of Chapter 11: Java Servlet Technology" in J2EE 1.4 tutorial. The build instruction in the tutorial is basically summed up as following: (It would be easier for you to following the instructions below.)
Start the App Server. You can use one of the following 3 options to start the Sun Java System App Server. (Stopping the App Server works in a similar fashion. Starting and stopping the App Server can be done in any mix of these options.)

Option 1: From the Start menu (Windows platform)

Start->All Programs->Sun Microsystems->Application Server PE->Start Default Server

Option 2: From the command line

Windows: c:\Sun\AppServer\bin\asadmin start-domain domain1 (to start admin server of domain1 and app server instance server1 under domain1)
Solaris/Linux: /opt/SUNWappserver/bin/asadmin start-domain domain1 (to start admin server of domain1 and app server instance server1 under domain1)

Option 3: Within NetBeans IDE

Select Runtime tab
Expand Server Registry
Right click Sun Java System App Server 8 and select Start/Stop Server
If the App Server is not runninging, click Start Server button

Start Derby database server (If you are using Sun Java System App Server 8.2) or Pointbase database server (if you are using Sun Java System App Server 8.1). You can find out what version of Sun Java System App Server is running by "asadmin version".

If you are using Sun Java System App Server 8.2, you can one of the following 3 options to start the Derby database server. (Stopping the database server works in a similar fashion. Starting and stopping the server can be done in any mix of these options.)

Option 1: From the Start menu (Windows platform)

Start->All Programs->Sun Microsystems->Application Server PE->Start Derby

Option 2: From the command line

Windows: asadmin start-database
Solaris/Linux: asadmin stop-database

Option 3: Within NetBeans IDE

Select Tools->Derby Database->Start Local Derby Database. (If it has been started already, you will see "Start Local Derby Database" grayed out.)

If you are using Sun Java System App Server 8.1, you can ue one of the following 2 options to start the Pointbase database server. (Stopping the database server works in a similar fashion. Starting and stopping the server can be done in any mix of these options.)

Option 1: From the Start menu (Windows platform)

Start->All Programs->Sun Microsystems->Application Server PE->Start Pointbase

Option 2: From the command line

Windows: c:\Sun\AppServer\pointbase\tools\serveroption\startserver.bat
Solaris/Linux: /opt/SUNWappserver/pointbase/tools/serveroption/startserver.sh

Option 3: Within NetBeans IDE

Select Tools->Pointbase Database->Start Local Pointbase Database. (If it has been started already, you will see "Start Local Pontbase Database" grayed out.)

Build and package bookstore common files

cd c:\j2eetutorial14\examples\web\bookstore
asant build (to compile Java source files of the common files)
asant package-bookstore (to build bookstore.jar file)

Create database tables

cd c:\j2eetutorial14\examples\web\bookstore (if you are not in this directory already)
asant create-db_common (to create database tables)

(Trouble-shooting) If this is the first time, you might see [sql] Failed to execute: DROP TABLE BOOKS under delete-db: target. This is benign.

Create Data Source in the App Server

cd c:\j2eetutorial14\examples\web\bookstore (if you are not in this directory already)
asant create-jdbc-resource_common

(Trouble-shooting) You might experience the following error " JdbcResource already exists: cannot add duplicate" as shown below if you already have created jdbc/BookDB Data Source in the App Server. If this happens, just move on to the next step.

C:\j2eetutorial14\examples\web\bookstore>asant create-jdbc-resource_common
Buildfile: build.xml

create-jdbc-resource_common:

admin_command_common:
[echo] Doing admin task create-jdbc-resource --connectionpoolid PointBasePool jdbc/BookDB

[sun-appserv-admin] Executing: create-jdbc-resource --port 4848 --host localhost
--passwordfile "c:\j2eetutorial14\examples\common\admin-password.txt" --user admin --connectionpoolid PointBasePool jdbc/BookDB

[sun-appserv-admin] Operation 'createJdbcResource' failed in 'resources' Config Mbean.
[sun-appserv-admin] Target exception message: JdbcResource already exists: cannot add duplicate

BUILD FAILED
file:C:/j2eetutorial14/examples/common/targets.xml:36: An exception occurred whi
le running the command. The exception message is: CLI137 Command create-jdbc-re
source failed..

Total time: 2 seconds
You can find out if you already have created jdbc/BookDB Data Source in the App Server by taking the following steps:

From your browser, go to http://localhost:4848 (to open admin console to the App Server)
Enter admin username and password and click Login
Expand Resources->JDBC->JDBC Resources. If you see jdbc/BookDB, then you have already created the jdbc/BookDB.

Build bookstore1

cd c:\j2eetutorial14\examples\web\bookstore1 (please note that this is ..\bookstore1 not ..\boostore directory)
asant build (to compile Java source files)

Deploy bookstore1 application

cd c:\j2eetutorial14\examples\web\bookstore1 (if you are not in this directory already)
asant create-bookstore-war (to create war file)
asant deploy-war

Access the bookstore1 application

From your browser, go to http://localhost:8080/bookstore1/bookstore. You should see the following picture.

Play around with the application to get some sense of which servlet is being invoked

Task2 - Understand the bookstore1 application

Read documentation of bookstore1 from Chapter 11: Servlet Technology, Section: The Example Servlets of the J2EE 1.4 tutorial.
Take a look at the servlets used in this application and see how these servlets are configured in the web.xml file.

Windows: dir/s *.java (to search for Java source files)
Solaris/Linux: find . -name \*.java -print (to search for Java source files)

Take a look at how each user interaction results in invoking a new servlet
Take a look at how the banner is being displayed in HTML page that is being displayed to the user
Take a look at filters used in this application and how these filters are configured in the web.xml file.
Take a look at listeners used in this application and how these listeners are configured in the web.xml file.
Please post your questions on the class alias if you have any questions.

Homework assignment - HW#3B (Estimate time: 1 hour) - Optional homework

Objectives

Getting exposed to a more complex Web application in which multiple Servlets are used (with forwarding among themselves)
Building and deploying bookstore1 using NetBeans IDE 5.0 leveraging ant build script that comes with the application

Task - Build and run bookstore1 using NetBeans IDE

Start NetBeans 5.0 IDE
Start the Derby or Pointbase database server as described in Task 1 above (if it has not been started already - you probably started it already in Task 1)
Create a new NetBeans project for bookstore. The bookstore directory contains Java source files that represent commonly used classes for BookDetails.java.

Create a New Project by selecting File from menu and then New Project
Under Choose Project pane, select Web and Web Project With Ant Script. Click Next.
Under Name and Location pane,

for Location field, select Browse button and browse the directory structure to select the following directory and click Open.

<j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore

Windows: C:\j2eetutorial14\examples\web\bookstore

Linux/Solaris: /home/username/j2eetutorial14/examples/web/bookstore

Click Next

Under Build and Run Actions pane,

Click Next

Under Web Sources pane,

Click Next

Under Source Package Folders pane,

click Next

Under Java Sources Classpath pane,

Click Add JAR/Folder.. button. Under Browse JAR or Folder window, browse to <J2EE_HOME>/lib directory (c:\Sun\AppServer\lib for Windows and /opt/SUNWappserver/lib for Solaris/Linux) and select j2ee.jar and click Open.

click Next

Under Web Sources Classpath pane,

click Finish

Observe that a new project node, bookstore, is created under Projects tab window

Build and package bookstore common files

Expand bookstore node and right click build.xml
Right click build.xml and select Run Targets->build
Right click build.xml and select Run Targets->package-bookstore

Create database tables

Right click build.xml and select Run Targets->create-db_common

Create a new NetBeans project for bookstore1 application

Create a New Project by selecting File from menu and then New Project
Under Choose Project pane, select Web and Web Project With Ant Script. Click Next.
Under Name and Location pane,

for Location field, select Browse button and browse the directory structure to select the following directory and click Open.

<j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1

Windows: C:\j2eetutorial14\examples\web\bookstore1

Linux/Solaris: /home/username/j2eetutorial14/examples/web/bookstore1

Click Next

Under Build and Run Actions pane,

Click Next

Under Web Sources pane,

for Web Pages Folder field, select Browse button to open file browser and browse the directory structure to select the following directory and click Open

<j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/web

Windows: C:\j2eetutorial14\examples\web\bookstore1\web

Linux/Solaris: /home/username/j2eetutorial14/examples/web/bookstore1/web

for Context Path field, fill it with /bookstore1
for J2EE Specification Level, accept the pre-selected value "J2EE 1.4"
Click Next

Under Source Package pane,

click Next

Under Java Sources Classpath pane,

Click Add JAR/Folder.. button. Under Browse JAR or Folder window, browse to <J2EE_HOME>/lib directory (c:\Sun\AppServer\lib for Windows) and select j2ee.jar and click Open.

click Next

Under Web Sources Classpath pane,

click Finish

Observe that a new project node, bookstore1-example, is created under Projects tab pane

Build, package, and deploy bookstore1-example Web application

Expand bookstore1-example node and right click build.xml
Right click build.xml and select Run Targets->build
Right click build.xml and select Run Targets->create-bookstore-war
Add the following two targets to bookstore1-example->build.xml (The reason you are adding these two targets is because deploy-war and undeploy-war would not work.)

<target name="deploy1-war">
    <antcall target="admin_command_common">
      <param name="admin.command"
        value="deploy ${j2ee.tutorial.home}/examples/web/${example}/${war.file}" />
    </antcall>
</target>

<target name="undeploy1-war">
    <antcall target="admin_command_common">
      <param name="admin.command"
        value="undeploy ${j2ee.tutorial.home}/examples/web/${example}/${war.file}" />
    </antcall>
</target>

Right click build.xml and select Run Targets->Other Targets->deploy1-war

Access the bookstore1 application

From your browser, go to http://localhost:8080/bookstore1/bookstore

(Trouble-shooting) If you see "HTTP Status 404 - Servlet BookStoreServlet is not available" error message, you might have deployed the application when the Pointbase database server is not running. Do take the following steps to correct the situation.

Start the Pointbase database server
Right click build.xml and select Run Targets->deploy-war

Perform book purchase actions

Things to be submitted

This is optional so nothing needs to be submitted

Homework assignment - HW#3C (Estimate time: 1 to 2 hours) - Optional homework

Objectives

Building and deploying bookstore1 using NetBeans IDE 5.0 from scratch (without using ant build script that comes with the application), a new ant script is being created by NetBeans
Given that you will have to do quite a bit of things in this homework, please be prepared that you might experience a problem or two along the way especially when you skip a step or two.
Instead of just cut-and-pasting the code from bookstore1 sample application, please try to write the code yourself first.

Task - Build and run bookstore1 using NetBeans IDE

Create a new NetBeans project.

Create a New Project by selecting File from menu and then New Project
Under Choose Project pane, select Web and Web Application. Click Next.
Under Name and Location pane,

for Project Name field, fill it with bookstore1netbeans
Click Finish accepting all the default values and selections

Observe that bookstore1netbeans project node is created in the Project tab window and default index.jsp gets displayed in the source editor

Create servlets: ShowCartServlet, CatalogServlet, BookStoreServlet, CashierServlet, BannerServlet, BookDetailsServlet, ReceiptServlet

Create ShowCartServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with ShowCartServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookshowcart from /ShowCartServlet.
Click Finish

Observe that ShowCartServlet.java is displayed in the source editor
Replace the NetBeans generated contents of ShowCartServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/ShowCartServlet.java

You can use Favorite window feature of NetBeans for this

Create CatalogServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with CatalogServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookcatalog from /CatalogServlet.
Click Finish

Observe that CatalogServlet.java is displayed in the source editor
Replace the contents of CatalogServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/CatalogServlet.java

Create BookStoreServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with BookStoreServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookstore from /BookStoreServlet.
Click Finish

Observe that BookStoreServlet.java is displayed in the source editor
Replace the contents of BookStoreServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/BookStoreServlet.java

Create CashierServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with CashierServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookcashier from /CashierServlet.
Click Finish

Observe that CashierServlet.java is displayed in the source editor
Replace the contents of CashierServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/CashierServlet.java

Create BannerServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with BannerServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /banner from /BannerServlet
Click Finish

Observe that BannerServlet.java is displayed in the source editor
Replace the contents of BannerServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/BannerServlet.java

Create BookDetailsServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with BookDetailsServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookdetails from /BookDetailsServlet
Click Finish

Observe that BookDetailsServlet.java is displayed in the source editor
Replace the contents of BookDetailsServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/BookDetailsServlet.java

Create ReceiptServlet

Right click bookstore1netbeans project node and select New and select Sevlet.
Under Name and Location pane of the New Servlet window,

for Class Name field, fill it with ReceiptServlet
for Package field, fill it with with servlets.
Click Next

Under Configure Servlet Deployment pane,

for URL Mapping(s) field, change it to /bookreceipt from /ReceiptServlet
Click Finish

Observe that ReceiptServlet.java is displayed in the source editor
Replace the contents of ReceiptServlet.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/servlets/ReceiptServlet.java

Create Filters and a helper class: OrderFilter.java, HitCounterFilter.java, CharResponseWrapper.java

Create OrderFilter

Right click bookstore1netbeans project node and select New and select File/Folder
Under Choose File Type pane, select Web under Categories and Filter under File Types. Click Next.
Under Name and Location pane of the New Filter window,

for Class Name field, fill it with OrderFilter
for Package field, fill it with with filters
Select Wrap Request and Response Objects
Click Next

Under Configure Filter Deployment pane,

Click Edit button

Under File Mapping dialog box,

Select Servlet radio button, and select ReceiptServlet
Click OK.

Click Finish
Observe that OrderFilter.java is displayed in the source editor
Replace the contents of OrderFilter.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/filters/OrderFilter.java

Create HitCounterFilter

Right click bookstore1netbeans project node and select New and select File/Folder
Under Choose File Type pane, select Web under Categories and Filter under File Types. Click Next.
Under Name and Location pane of the New Filter window,

for Class Name field, fill it with HitCounterFilter
for Package field, fill it with with filters
Select Wrap Request and Response Objects
Click Next

Under Configure Filter Deployment pane,

Click Edit button

Under File Mapping dialog box,

Select Servlet radio button, and select BookStoreServlet
Click OK.

Click Finish
Observe that HitCounterFilter.java is displayed in the source editor
Replace the contents of HitCounterFilter.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/filters/HitCounterFilter.java

Create CharResponseWrapper.java

Right click bookstore1netbeans project node and select New and select Java Class
Under Name and Location pane of the New Java Class window,

for Class Name field, fill it with CharResponseWrapper
for Package field, fill it with with filters
Click Finish

Observe that CharResponseWrapper.java is displayed in the source editor
Replace the contents of Counter.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/filters/CharResponseWrapper.java

Create Listeners: ContextListener

Create ContextListener

Right click bookstore1netbeans project node and select New and select File/Folder
Under Choose File Type pane, select Web under Categories and Web Application Listener under File Types. Click Next.
Under Name and Location pane of the New Web Application Listener window,

for Class Name field, fill it with ContextListener
for Package field, fill it with with listeners
for Interfaces to implement, select Context Listener (it's probably already selected as a default).
Click Finish

Observe that ContextListener.java is displayed in the source editor
Replace the contents of ContextListener.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/listeners/ContextListener.java

Create utility classes - Counter.java and Currency.java

Create Counter.java

Right click bookstore1netbeans project node and select New and select Java Class
Under Name and Location pane of the New Java Class window,

for Class Name field, fill it with Counter
for Package field, fill it with with util
Click Finish

Observe that Counter.java is displayed in the source editor
Replace the contents of Counter.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/util/Counter.java

Create Currency.java

Right click bookstore1netbeans project node and select New and select Java Class
Under Name and Location pane of the New Java Class window,

for Class Name field, fill it with Currency
for Package field, fill it with with util
Click Finish

Observe that Currency.java is displayed in the source editor
Replace the contents of Currency.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/util/Currency.java

Create database handler classes - BookDBAO.java

Create BookDBAO.java

Right click bookstore1netbeans project node and select New and select Java Class
Under Name and Location pane of the New Java Class window,

for Class Name field, fill it with BookDBAO
for Package field, fill it with with database
Click Finish

Observe that BookDBAO.java is displayed in the source editor
Replace the contents of BookDBAO.java with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/src/database/BookDBAO.java

Create error page(s), and map exception classess to the error page(s)

Create errorpage.html

Right click bookstore1netbeans project node and select New and select HTML
Under Name and Location pane of the New HTML File window,

for HTML File Name field, fill it with errorpage
Click Finish

Observe that errorpage.html is displayed in the source editor
Replace the contents of errorpage.html with the one from <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore1/web/errorpage.html

Map exceptions to the errorpage.html

Expand bookstore1netbeans project node, expand Web Pages->WEB-INF. Double-click web.xml to open it in the source editor.
Select Pages tab window from the right side of the pane
Expand Error Pages (if it has not been expanded yet).
Map exception.BookNotFoundException

Click Add. The Add Error Page dialog box gets displayed.
Under Add Error Page dialog box,

for Error Page Location field, click Browse and expand Web Pages and select errorpage.html. (Don't be alarmed with red-colored warning message and move on.)
for Exception Type field, fill it with exception.BookNotFoundException
click OK

Map exception.BooksNotFoundException (this is different from the BookNotFoundException)

Click Add. The Add Error Page dialog box gets displayed.
Under Add Error Page dialog box,

for Error Page Location field, click Browse and select Web Pages and select errorpage.html.
for Exception Type field, fill it with exception.BooksNotFoundException
click OK

Map javax.servlet.UnavailableException

Click Add. The Add Error Page dialog box gets displayed.
Under Add Error Page dialog box,

for Error Page Location field, click Browse and select Web Pages and select errorpage.html.
for Exception Type field, fill it with javax.servlet.UnavailableException
click OK

Add JDBC resource

Expand bookstore1netbeans project node, expand Web Pages. Double-click web.xml to open it in the source editor.
Select XML
Add the following <resource-ref> element right before </web-app> as following. The code fragment that needs to be added is highlighted with bold font.

<resource-ref>
    <res-ref-name>jdbc/BookDB</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
    <res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
</web-app>

Add bookstore.jar as a runtime library to the bookstore1 project

Right click bookstore1netbeans project node and select Properties. The Project Properties dialog box gets displayed.
Under Project Properties dialog box,

Select Libraries under Categories and select Add Jar/Folder. The Add Jar/Folder dialog box gets displayed.

Under Add Jar/Folder dialog box,

Browse down to select <j2ee1.4tutorial_install>/j2eetutorial14/examples/web/bookstore/dist/bookstore.jar.
Click Open

Click OK

Copy the GIF file (duke.books.gif) to the application

Select Window from menu bar and select Favorites (CTRL+3). The Favorites window allows you to access any file on your computer or network without having create a project for the file. The Favorites tab window gets created along with Projects, Files, Runtime tab windows.
Click Favorites tab window and right click Favorites and select Add to Favorites.
Browse the directory to select the <j2ee1.4tutorial_install>/j2eetutorial14/examples/web and click Add button. Observe that web node is added to the Favorites window.
Expand web->bookstore1->web.
Select duke.books.gif and right click it and select Copy.
Click Projects tab window.
Select bookstore1netbeans->Web Pages and right click it and select Paste. Observe that the duke.books.gif file now is present under Web Pages node.

Set the Relative URL of the application

Right click bookstore1netbeans project node and select Properties
Select Run under Categories
For Relative URL field, fill it with /bookstore

Build and run the application

Right click bookstore1netbeans project node and select Run Project (to compile, deploy, and access the application)
Default browser of your system will get displayed automatically accessing the application

If the browser does not get popped up, from your browser go to http://localhost:8080/bookstore1netbeans/bookstore (change the port number 8080 to whatever port number your Sun Java System App Server or Tomcat is using.)

(Trouble-shooting) If you enconter HTTP Status 404 -Servlet BookStoreServlet is not available error condition, it is highly likely due to the fact that the database server is not running somehow. Start the pointbase database server and rerun the application.

Things to be submitted

This is optional so nothing needs to be submitted

NetBeans Features I recommend you to try in this exercise

Context sensitive JavaDoc retrieval on any J2EE API

Expand bookstore1-example->src->servlets
Open one of the Servlet source files, for example, BookStoreServlet.java, in the source editor window by double-clicking it
Scroll down the window and move the cursor to string "HttpServlet" and right click it and then select Show Javadoc
You will see Java document of the HttpServlet gets displayed in your default browser
Try to see Java documents of the other Servlet classes and methods

Refactoring

Expand bookstore1-example->src->database
Open BookDBAO.java in the source editor window by double-clicking it
Select "BookDBAO" string and right-click it. Select Refactor and then select Rename.
In the Rename window, fill up the New Name field with "BookDBAONewName" then click Next.
On the bottom of the IDE, all the places where changes will be made is shown. Click Do Refactoring button to confirm the refactoring

Intelligent string search (find)

Note that changes are made to all files where "BookDBAO" is used including BookDBAO.java itself
Select the string BookDBAONewName string by double-clicking it. Right-click it and select Find Usages
In the Find Usage window, click Next
On the bottom of the IDE, under Usage pane, all the usages of BookDBAONewName will be displayed
Please do play around this intelligent finding by selecting any string you want and then right-clicking it and then selecting Find Usage

HTTP monitoring

Enable the Sun Java System App Server 8 for HTTP monitoring (you have to do this only once)

Click Runtime pane
Expand Runtime->Server Registry
Right click Sun Java Sytem Application Server 8 and select Properties
Select Enable HTTP Monitor check box
Right click Sun Java Sytem Application Server 8 and select Start/Stop Server
If the Server is in running state, restart the server by selecting Stop Server and then Start Server button
Close the Server Status window by clicking Close button. HTTP monitoring is now enabled.

Open HTTP monitor window

Select Windows from munu-bar and select HTTP Monitor

Access and run the bookstore1 application

From your browser, go to http://localhost:8080/bookstore1/bookstore
Perform a few actions

Take a look at the captured HTTP traffic

In the HTTP monitor window, select one HTTP request or response message
You can examine the content, cookie, session, context, client and server, and context information by clicking options on the right pane of the HTTP monitor

Homework assignment - HW#3D (Estimate time: 1 to 2 hours)

Objective

Exercise servlet filtering scheme
You are welcome to use NetBeans to do this homework

Task

Modify "Duke's Bookstore application" bookstore1 example to add another filter that calculates and display the total "leftover inventory" of ordered books. (The total inventory of ordered books might not be that much meaningful information and we are using it here for just for the sake of exercising the filtering scheme.)
The goal of this exercise is to build a filter. As long as you build a filter to do this exercise, how you interpret "leftover inventory" and "where you display the information" can be your choice.

Things to be submitted

Source code and web.xml file

Homework assignment - HW#3E (Estimate time: 1 to 2 hours)

Objective

Exercise programming including another web resources in the response

Task

Use the code and deployment descriptor of HW#2C or HW#2D as a starting point
Add your own banner in all your HTTP responses using another servlet

Things to be submitted

Source code and web.xml file

Helpful hints

Take a look at "Chapter 11: Java Servlet Technology, Section: Including other resources in your response" from J2EE 1.4 Tutorial (for users using J2EE 1.4 SDK)

Homework assignment - HW#3F (Estimate time: 1 to 2 hours) - Optional homework

Objective

Exercise servlet programming for receiving servlet lifecycle events

Tasks

Use the code and deployment descriptor of HW#2D as a starting point
Write code that capture "Attributed added" events to both Web context and Session

Things to be submitted

This is optional so there is nothing to be submitted