Apache modules are dynamically linked libraries that enhance Apache’s capabilities. They run as threads within Apache child processes; some modules carry out work themselves, others are control structures for external processes.
When Apache is enhanced with modules such as those supplied by Oracle, it becomes a routing process that receives URLs and dispatches them to the appropriate service, which
is implemented by the module.
There are a number of Apache modules developed by Oracle Corporation that are shipped with Oracle Application Server.
- modplsql: This module accepts URLs that request the running of PL/SQL procedures within an Oracle database
- modoc4j: This module accepts URLs that request the running of Java servlets. The Java is not run by modoc4j but by the OC4J instance, which is a process external to Apache.
- modosso: This module enables the connection to the Single Sign-On (SSO) service
- modossl: Apache can also be configured to use secure sockets using this module
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