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Lately I have been playing around with Oracle's
Application Express (APEX, formerly HTMLDB). This is a rapid development environment for small
application that is entirely web based. Unlike J2EE, the web
application actually runs as PL/SQL in the database, although you
can load the OHS on a separate server.
Basically a fast and surprisingly easy way to create a mod_plsql
application.
One cool aspect of APEX is that it can be
integrated into the application server midtier instances and take
advantage of the AS10g Web Cache.
Integrating APEX into the application server is
relatively straight forward since the heavy lifting is performed in
the database. APEX is located on the companion disk of the Oracle
10g database. It can also be installed in a 9iR2 database.
On the midtier instance execute the Oracle Universal Installer (runInstaller)
and install only APEX in a separate home directory.
The installer will ask for connection data for the database.
Again most of the install goes into the database.
1. Copy the $ORACLE_HOME (HTML DB)
/marvel/images to the same directory in the midtier ORACLE_HOME.
2. Copy the $ORACLE_HOME (HTML DB) /Apache/modplsql/conf/marvel.conf
to the same location in the midtier ORACLE_HOME.
We are finished with the APEX ORACLE_HOME and you
can delete it. Remember APEX resides in the database.
3. In the midtier edit the marvel.conf file.
Change the Alias /i/ to the directory you copied the images to.
4. Edit the midtier oracle_apache.conf and add
the line below to include the marvel.conf file.
include "/<midTier
ORACLE_HOME>/Apache/modplsql/comf/marvel.conf"
5. Now run dcmctl to update the new
configuration in the Metadata Repository.
dcmctl updateConfig -ct ohs
6. Restart OHS.
You're done! APEX in now integrated in the
application server.
On Clustered midtiers, the configuration will
propagate but the file changes, marvel.conf and the images will not.
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