Enable Automatic Compilation of JSP pages in R12 Environment

Release 12.0 and 12.1 using OC4J:

In Release 12 the (automatic) compilation of a JSP is disabled and, at runtime,
only the pre-compiled JSP's are picked up.

In cases where development activities are done and JSP pages are changing often this default setting makes things more complicated. Each time a JSP is deployed a manual compilation using the ojspCompile.pl is needed and the OC4J running the oacore needs a restart to pick up the changes.
This will also affect other people working on the same environment.

This can be achieved by performing the following:

• Login into E-Business suite and select System Administrator responsibility
• Select function AutoConfig (under Oracle Applications Manager) (*)
• For each web tier server perform the following: 
•  Click on pencil icon under Edit Parameters
•  Select tab System
•  Expand section jtff_server
•  Change value for the entry s_jsp_main_mode from justrun to recompile
•  Confirm the change by clicking Save button
• Run AutoConfig to propagate the changes to the configuration files
• Verify that the $INST_TOP/ora/10.1.3/j2ee/oacore/application-deployments/oacore/html/orion-web.xml  has the following:

                 <init-param>
                 <param-name>main_mode</param-name>
                 <param-value>recompile</param-value>
                 </init-param>

• Restart the web tier services
• Request a JSP in the browser which is compiled. See that a new _<jspname>.class is created in _pages
• Make a change in the JSP file
• Request it again in the browser. See that _<jspname>.class is 'refreshed' in _pages and the change is seen in the browser

Release 12.2 using WLS:

• In Release 12.2 it's currently not possible to enable automatic recompilation of JSP pages.