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== JEE 5 API and Services ==
http://java.sun.com/javaee/technologies/

[[Image:overview-j2eeArchitecture.gif]]

{| class="wikitable" border="1" cellspacing="0" cellpadding="5"
|-
!EJB Container!!Web Container!!Application Client Container!!Applet Container
|-
| J2SE || J2SE || J2SE || J2SE
|-
|JAX-RPC ||JAX-RPC||JAX-RPC||
|-
|JAX-WS||JAX-WS||JAX-WS||
|-
|SAAJ||SAAJ||SAAJ||
|-
|Web Services||Web Services||Web Services||
|-
|WS Meta data||WS Meta data||WS Meta data||
|-
|StAX||StAX||StAX||
|-
|JAXR||JAXR||JAXR||
|-
|JMS||JMS||JMS||
|-
|Management||Management||Management||
|-
|Java Persistence||Java Persistence||Java Persistence||
|-
|Java Mail||Java Mail|| ||
|-
|JAF||JAF|| ||
|-
|JACC||JACC|| ||
|-
|Connectors||Connectors || ||
|-
|JTA||JTA|| ||
|-
|EJB|| || ||
|-
| ||Java Server Faces|| ||
|-
| ||JSTL|| ||
|-
| ||Servlet || ||
|-
| ||JSP || ||
|-
| || || Application client ||
|-
| || || || Applet
|}

== Services ==
===J2SE ===
===JAX-RPC===
* Web services SOAP 1.1
* [http://www.ibm.com/developerworks/webservices/library/ws-tip-jaxwsrpc.html comparison to JAX-WS] which is part of a [http://www.ibm.com/developerworks/views/webservices/libraryview.jsp?search_by=JAX-RPC+versus+JAX-WS&S_TACT=105AGX04&S_CMP=ART series]
* 90% of schema type covered - remainder mapped to SOAPElement - own mapping
* Synchronous
===JAX-WS===
* Replaces JAX-RPC
* Web services SOAP 1.1 and SOAP 1.2
* 100% schema type covered uses JAXB
* Supports asynchronous
* Supports message oriented
* dynamic server model
* MTOM - (Message Transmission Optimization Mechanism) [[Web Services]] attachment specification for efficient transmission of binary data. Uses XOP (XML-binary Optimized Packaging)

===SAAJ===
Soap with Attachements API for Java
* Basis for JAX-RPC and JAX-WS low level API
* Support SOAP messaging (asynchronous)

===Web Services===
===WS Meta data===
used with WS-Addressing, WSDL and WS-Policy for discovery about web service end point
* aids self configuration
* allows automated client

===StAX===
Streaming API for XML
* Pull based streaming API for XML
* Reading/writing

===JAXR===
Java API for XML Registries
* supports interacting with registries such as ebXML Registry and UDDI
* based on SAAJ
* can be used to exchange XML documents stored in registries

===JMS===
Java Message Service
* Asynchronous messaging
* Supports transactions
Models:
* Publish subscribe
* Point to point
Loosely coupled, reliable

Business component

===Management===
===Java Persistence===
* standards based object to relational mapping
# javax.persistence - API
# Java Persistence Query Language - similar to SQL but operates on objects
# Object/Relational mapping

====SDO Service Data Object====
Complimentary - for service oriented architecture - supports data formats other than relational models - OASIS spec (previously Web Data Objects)
* supports meta data so can represent object graph

===Java Mail===
Mail API for sending SMTP and reading mail from IMAP/POP
Built with JAF

===JAF===
JavaBeans Activation Framework

* Enables finding the type of a piece of data, locate the object to encapsulate it and discover methods.
* Supports dynamic registering of types and actions
* Creates appropriate Java Bean component to perform operations

used in Java Mail libraries to deserialise attachments in the mail to objects

===Connectors ===
JCA Java EE Connector Architecture
* for tools vendors ans system integrators
Resource adaptors to support EIS
* one per EIS/DB type
* interacts with JEE resource manager
* performance oriented, secure, scalable, message baseed
* supports transactions, integration of web services to EIS
** JAX-WS and JAC complimentary technologies for EAI (Enterprise Application Integration)
* may be synchronous or asynchronous
====JDBC====
Java DataBase Connectivity API
* For Invoking QSL from java
* can be used from JSP/Servlet or EJB
Must conform to two specifications:
# Application API
# Service provider interface for resource manager

===JTA===
Java Transaction API
* demarcation of transaction boundaries
* allows multiple resources to participate
* based on open API - X/Open XA
Default commit on one update - allows wrapping multiple updates

Transaction manager (Transaction Processing monitor - TP monitor)
* Interacts with the resource manager
** API for container
* Client interacts to begin/commit/rollback transaction
** API for client (separate from container)

===Java Server Faces===
Interface framework based on MVC
* JSP for display with custom tag libraries
* event model
* state management
* java beans with dependency injection
* expression language
Supports:
* input validation
* page navigation configuration
* managed model object creation
* data conversion between objects/components
Rendering model supporting different markup languages
* Renderkit - HTML 4.01

===JSTL===
JavaServer Pages Standard Tag Library
* extends JSP adding a tag library
includes:
* loops
* xml processing
* conditional constructs
* internationalisation
* functions - string manipulation
* database

===Servlet ===
Request response programming

===JSP ===
Now includes [http://java.sun.com/products/jsp/reference/techart/unifiedEL.html expression language] (JSP 2.1) - simple way to access data objects
* deferred expressions - not immediatly evaluated
* set and get expressions - ability to access server side
* method expressions

Mixes static data - html/xml/wml & jscp - scripting code for dynamic page construction

=== JACC ===
Java Authorization Contract for Containers

Allows third party authorisation tools to decide on access to J2EE resources

Authenticated user makes a request to a web or a EJB resource
* security runtime decides on access. (access decision)
* JACC defines the permission object to be created
* policy context handlers are registered
* policy context identifier (contextID) is set
* call to the java.security.Policy implemented by the provider - makes the access decision

=== EJB ===
Three types of Enterprise Beans

* Session Beans
** transient conversation with client
* Entity Beans
** replaced by Java Persistence API
** persistence manager responsible for data being stored
* Message Driven Beans
** asynchronous business component

=== JAXP ===
Java API for XML Processing
* processing via DOM
supports:
* SAX - Simple API for XML
* XSLT
* namespaces/schemas

=== JNDI ===
Java Naming Directory Interface
* Common API to access LDAP, NDS, DNS, NIS
* Setting attributes or objects
* Searching for object by attributes
* can be configured by JNDI naming context and environment
** e.g. can change DB without change to source code
* includes system objects such as JTA for user transactions
* should exist in naming context e.g. java:/comp/env/ejb java:/comp/env/jdbc
* [http://java.sun.com/webservices/jaxr/faq.html relationship to JAX-R]
** The JAXR API needs richer metadata capabilities for classification and association, as well as richer query capabilities.

=== JAAS ===
Java Authentication and Authorisation Service
* allows a java app to authenticate and authorise user or group
* is a instance of PAM - Pluggable Authentication Module
** extends java security architecture to support user based authentication

J2EE API and Services - Revision history

Martin: Created page with "== JEE 5 API and Services == http://java.sun.com/javaee/technologies/ Image:overview-j2eeArchitecture.gif {| class="wikitable" border="1" cellspacing="0" cellpadding="5..."