OHS provides virtual host capabilities, which let you use a single instance of OHS to
map to multiple hostnames. OHS can act as a proxy server or a reverse proxy server,
and it can also support URL rewriting, which allows administrators to change the
location of a page without requiring users to change the way they access the page.
OHS includes a proxy plug-in for Internet Information Server and SunONE server,
enabling requests to these servers to be automatically rerouted to OHS. These plugins
can provide the load balancing functionality, described in the later section,
???Clustering,??? for Oracle Containers for J2EE (described in the following section).
Containers for J2EE (OC4J)
The core Java capabilities of Oracle Application Server are provided by Oracle Application
Server Containers for J2EE, also known as OC4J. This component is a Java
virtual machine, providing support for a wide range of Java 1.3 standards, including
session beans, entity beans (with both bean-managed and session-managed persistence),
and message-driven Java beans, Java Server Pages 1.
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