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Open the myfaces node in the tree view in the Projects tab and expand it to show the orgapachemyfaceslifecycleLifecycleImpljava node inside the myfaces-111-src\ impl directory Select the LifecycleImpljava node The Navigator window, below the Projects tab, shows the methods in that class Double-click the render( ) method and the source code opens up to that method Put the cursor on the isResponseComplete( ) line and right-click and choose Toggle Breakpoint from the pop-up menu Return to the Projects tab and open up the trainer project and expand the view to select the comjsfcompreftrainermodelTrainingEventRegistryjava file Double-click the constructor for that class in the Navigator and set a breakpoint on the following line
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if (eventlist == null) {
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You are now ready to run the server and test the application Go to the Runtime tab and expand the Servers node to select the Bundled Tomcat node Right-click this node and choose Properties In the Server Manager dialog, choose the Startup tab Look at the Debugger Transport section If you are using Windows, you ll want to choose the Shared Memory Name radio button, filling in a simple string in the text field, such as jdbconn Otherwise, the shared memory debugging transport is unavailable and you ll have to take note of the socket port Click Close and return to the Runtime tab Right-click the Bundled Tomcat node and this time choose Start in Debug Mode The server will start up Make sure Virtual Trainer is installed using the usual Tomcat webapp installation methods From the main menu choose Run | Attach Debugger and click OK Go to a browser and
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browse to Virtual Trainer for example, at http://localhost:8080/trainer/ The breakpoint in LifecycleImplrender( ) should be hit, and show up as green in the debugger At this point, you can mouse over variables and see their values, and many more options are available from the Window | Debugging menu Please consult the NetBeans documentation to discover the full power of the NetBeans debugger Right-click the line with the breakpoint and choose Toggle Breakpoint This will remove the current breakpoint From the Run menu, choose Continue Go back to the browser, log in as userid jake password jake , and press the login button You will now hit the second breakpoint, in the TrainingEventRegistry constructor
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One of the benefits of using an advanced IDE for debugging is that some of them even have the ability to offer debugging support throughout the entire lifecycle of a running Web application including both JSP execution and Java source execution We conclude the chapter with a brief look at how to debug the Virtual Trainer application JSP content as well as Java source using Oracle JDeveloper 10g Oracle JDeveloper s JSF development experience will be examined in more detail in 17; however, the next few paragraphs introduce how to debug both JSP and Java source code using an advanced JSF-enabled Java IDE such as JDeveloper NetBeans, JavaStudio Creator, Eclipse, and other IDEs have this capability, but we focus on JDeveloper here to increase the breadth of coverage We ll forgo the source code importation aspect and assume you have a running version of the Virtual Trainer application inside JDeveloper s development environment Since JDeveloper supports JSP source debugging, let s first mark a few lines in the edit_tejsp (Edit Training Event) page by clicking the left side of the JSP code editor to insert a few breakpoints As Figure 16-9 shows, notice that JDeveloper s visual JSP editor also shows the page in its runtime appearance By inserting breakpoints in the JSP source code, at runtime, the execution of the JSP will halt at the line specified and allow for full inspection of all runtime variables After inserting JSP breakpoints, you can switch to the Java code editor and, in the same fashion, insert breakpoints in the EditTejava class which serves as a backing bean to the edit_tejsp page (See Figure 16-10) Now that debug points have been put in both JSP and Java source, you can start the application in debug mode This will launch JDeveloper s internal J2EE server (OC4J) and invoke a browser to access the application After you log in to the application and then click one of the Edit links for a specific Training Event, the debugger will halt execution and JDeveloper will return to the forefront and display the source in debug mode At this point, you can step through the lines of the JSP line by line or resume execution until the next debug point While the application is halted, you can inspect all the application s objects in memory at this current moment using the debugger s various windows (See Figure 16-11) Of most use is the Smart Data debugger window It provides the developer with a live view of the most pertinent application data at runtime The other debugger windows are useful, as well as the call Stack window, which shows the call stack for the current thread For this run-through, click the Resume button to continue rendering the page in the browser At this point, the focus is back on the browser and you can change a value in the Edit Training Event form, such as the status or the online trainer advisor, and then click the Update button As the action method in the EditTejava backing bean executes, it will again halt at the second debug point, as shown in Figure 16-12
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16:
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A u t o m a t e d Te s t i n g a n d D e b u g g i n g o f J a v a S e r v e r F a c e s A p p l i c a t i o n s
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