P5EE - J2EE Summary Information

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J2SE (Standard Java distribution): [ J2SE 1.4 API ]
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Technologies/Techniques

J2EE sees the following technologies and techniques as important to account for in Enterprise Software. The packages in square brackets ([]) are not formally part of J2EE, but they are frequently used in conjunction with it or are being considered for inclusion in future specifications.

Technology/Technique	Examples	Packages/Modules
Web Server Extension		Servlets (Java Servlets)
Template System		JSP (Java Server Pages)
Data Persistence		EJB (Enterprise Java Beans) [Castor] (a Java object-relational mapping tool) [JAWS] (Just Another Web Storage, JBoss's O/R mapping tool)
RDBMS	Oracle, MySQL, Sybase, ...	JDBC (Java Database Connectivity) [SQLJ] (Java embedded SQL) (reference) [JDO] (Java Data Objects)
Security		JAAS (Java Authentication and Authorization Services) [JCE] (Java Cryptography Extension) [JSSE] (Java Secure Socket Extension)
Network Protocols	HTTP, HTTPS
Transactions		JTA (Java Transaction API) JTS (Java Transaction Service)
Remote Procedures	RMI-JRMP, RMI-IIOP/CORBA	RMI-IIOP/JavaIDL (Java Interface Definition Language)
Asynchronous Messaging	IBM MQ Series	JMS (Java Messaging Service)
Directory Services	LDAP, DNS, ...	JNDI (Java Naming and Directory Interface)
Mail Services	IMAP, POP3, SMTP, MIME, ...	JavaMail (Java Mail)
Language Introspection (runtime binding)		JAF (JavaBeans Activation Framework)
XML	Deployment Descriptors	JAXP (Java API for XML Parsing)
External Interfaces (to legacy systems)		Connector (J2EE Connector Architecture) J2EE SPI (Service Provider Interface)
Web Services	XML-RPC	[JAXM] (Java API for XML Messaging) [JAXR] (Java API for XML Registries) [JAXB] (Java API for XML Binding) [JAX-RPC] (Java API for XML RPC)
User Interface Widgets		[Applets] (Java Applets) [AWT] (Java Abstract Window Toolkit) [JFC/Swing] (Java Foundation Classes)
Application Management		[JMX] (Java Management Extension) .war (Web Application Archive) [JNLP] (Java Network Launch Protocol, i.e. Java Web Start)
Logging and Auditing		[Log4J] (Logging for Java)

Security

Authentication - The means by which communicating entities prove to one another that they are acting on behalf of specific identities (e.g., client to server and/or server to client).
Authorization (Access Control) - The means by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability contraints.
Data Integrity (MAC - message authentication check) - The means used to prove that information could not have been modified by a third party (some entity other than the source of the information). For example, a recipient of data sent over an open network must be able to detect and discard messages that were modified after they were sent.
Confidentiality (Data Privacy) - The means use to ensure that information is only made available to users who are authorized to access it.
Non-repudiation - The means used to prove that a user performed some action such that the user cannot reasonably deny having done so.
Auditing - The means used to capture a tamper-resistant record of security related events for the purpose of being able to evaluate the effectiveness of security policies and mechanisms.

Architecture

Architecture (Processes)

Architecture (Layers)

Architecture (Systems)

The following are examples given by BEA Weblogic for deploying their J2EE servers in a clustered environment.

P5EE - J2EE Summary Information

Technologies/Techniques

Security

Architecture

Architecture (Processes)

Architecture (Layers)

Architecture (Systems)

Small Cluster

Cluster with Web Server Tier

Cluster with Separate Servlet and EJB Tiers

Internet-Serving Cluster