The debugger enables you to detect and diagnose
errors in your application. It allows you to control the execution of your
program by setting breakpoints, suspending threads, stepping through the code,
and examining the contents of the variables. You can debug a JavaServer Pages
(JSP) without losing the state of your application.
To debug a JSP file on a server:
- In the Project Explorer view, open your JSP
file. In a Web project, JSP files are located in the Web Content
folder. Double-click the JSP file, the file opens in an editor.
- To set one or more breakpoints, you can complete the following:
- Verify you are using the Source page of the editor. If multiple
pages are available for the editor, such as Design, Source or Preview page,
select the Source page on the bottom of the editor.
If multiple pages are not available, the editor defaults to a source editor.
- Select a line of code in the editor and double-click the marker
bar directly to the left of the line where you want to add the breakpoint.
- From the JSP file's context menu in the Project
Explorer view, click Debug As> Debug on Server. The
workbench switches to the Debug perspective and the server is launched in
debug mode.
- In the Debug view, step through the code and
make the necessary changes to the JSP file. For detailed information
on debugging, refer to the Debugging Java™ applications documentation.
- Save the JSP file.
- Click the Refresh icon
in the Web Browser to update the changes. The state of your application
is not lost and the server recognizes your changes.
Note: - If you are running the JSP file on a remote WebSphere® server, the JSP cache directory
must be cleared in order to force the class file to be in the correct JSP
source debug mode. If the cache is not cleared, some compiled unchanged JSP
files may still be compiled in the previous JSP source debug mode.