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Chapter 6. Oracle Application Server Containers for J2EE
The Oracle Application Server
Containers for J2EE product provides the Java environment for the
Oracle Application Server. OC4J is a 100% pure Java J2EE Server. As
such, it can useand applications can be developed
withany standard Java Development Kit (JDK). This
standardization allows you the option of using the JVM that best
leverages your hardware platform. OC4J has J2EE-certified Servlet and
EJB containers, and a JSP translator. OC4J provides all the standard
J2EE services such as
session, transaction, and persistence
management.Table 6-1 lists the various
J2EE APIs supported by the
OC4J releases at the time of this writing.
Release | ||||
|---|---|---|---|---|
API | 9.0.1 | 9.0.2 | 9.0.3 | 9.0.4 |
Java Development Kit (JDK) | 1.1 | 1.3 | 1.3 | 1.4 |
Enterprise JavaBeans (EJB) | 1.1 | 1.1+ | 2.0 | 2.0 |
J2EE Connector Architecture | 1.0 | 1.0 | 1.0 | |
Java Authentication and Authorization Service (JAAS) | 1.0 | 1.0 | 1.0 | |
JavaMail API | 1.1.2 | 1.1.2 | 1.1.2 | |
Java API for XML Parsing (JAXP) | 1.0 | 1.1 | 1.1 | |
Java Database Connectivity (JDBC) | 1.1 | 2.0 | 2.0+ | 2.0+ |
Java Message Service (JMS) | 1.0.1 | 1.0.1 | 1.0.2 | 1.0.2b |
Java Naming and Directory Interface (JNDI) | 1.2 | 1.2 | 1.2 | |
JavaServer Pages (JSP) | 1.0 | 1.1 | 1.2 | 1.2 |
Java Transaction API (JTA) | 1.0.1 | 1.0.1 | 1.0.1 | |
Java Servlet | 2.0 | 2.3 | 2.3 | 2.3 |
the list demonstrates Oracle's commitment to support
the most current versions of J2EE APIs in a timely manner. If
you're interested in knowing what J2EE APIs are
currently supported, go to the Oracle Technology
Network web site at http://otn.oracle.com and look up the
information under documentation, application server, OC4J
User's Guide.As discussed in Chapter 2, OC4J can be
clustered across hosts to provide almost unlimited horizontal scaling
to satisfy any level of demand. However, OC4J can also be configured
with several instances on a host to ease the management of
applications, or to run as a lightweight standalone server for
application development purposes.A great deal of what we describe in this chapter is standard J2EE
functionality. Nevertheless, we cover this functionality to ensure
that readers of all levels will be able to understand the added value
the J2EE portion of Oracle Application Server provides. In addition,
this chapter covers Oracle value-added services, touches on server
management, discusses how deployment is supported, examines
standalone configuration, and finishes up with the impact that
clustering the OC4J has on maintaining state in J2EE applications.
