{"id":3219,"date":"2012-06-22T08:47:38","date_gmt":"2012-06-22T13:47:38","guid":{"rendered":"http:\/\/jianmingli.com\/wp\/?p=3219"},"modified":"2012-08-25T20:51:28","modified_gmt":"2012-08-26T01:51:28","slug":"z1-102-defining-java-enterprise-edition-terminology-and-architecture","status":"publish","type":"post","link":"https:\/\/jianmingli.com\/wp\/?p=3219","title":{"rendered":"Defining Java Enterprise Edition Terminology and Architecture"},"content":{"rendered":"

This is part of 1Z1-102: Oracle Weblogic Server 11g: System Administration I<\/a><\/p>\n

<< Previous<\/a><\/p>\n

Describe the Technologies in Java Enterprise Edition (JEE)<\/a><\/h2><\/span>\n

Distributed Systems<\/h3><\/span>\n

* Distributed systems divide the work among multiple independent modules
\n* Failure of a single system does not bring down the whole system
\n* Distributed systems are more
\n– Available
\n– Scalable
\n– Maintainable<\/p>\n

J2EE Architecture<\/h3><\/span>\n
\"\"<\/a><\/h6><\/span>\n

Web Application Technologies<\/h3><\/span>\n

* Servlet
\n* JSP
\n* JSTL
\n* JSF
\n* Debugging Support for Other Languages<\/p>\n

Web Services Technologies<\/h3><\/span>\n

* JAX-RPC
\n* JAX-WS
\n* JAX-RS
\n* JAXB
\n* Implementing Enterprise Web Services
\n* Web Services metadata for the Java Platform
\n* JAX-Messaging
\n* JAX-R (Registry)<\/p>\n

Enterprise Application Technologies<\/h3><\/span>\n

* Contexts and Dependency Injection for Java (CDI, Web Beans)
\n* DI for Java
\n* Bean Validation
\n* EJB
\n* JCA
\n* Java Persistence (JPA)
\n* Common Annotations for the Java Platform
\n* JMS
\n* JTA
\n* JavaMail
\n* JNDI<\/p>\n

Management and Security Technologies<\/h3><\/span>\n

* Java Authentication Service Provider Interface for Containers
\n* Java Authorization Contract for Containers
\n* Java EE Application Deployment
\n* J2EE Management<\/p>\n

Java EE Related Specs in Java SE<\/h3><\/span>\n

* JAXP
\n* JDBC
\n* JMX
\n* JAF
\n* StAX<\/p>\n

EJB<\/h3><\/span>\n

* Distributed components written in Java
\n* Have well defined interface<\/p>\n

JDBC<\/h3><\/span>\n

* Standard Java interface for accessing heterogeneous databases<\/p>\n

JNDI<\/h3><\/span>\n

* Java API for accessing naming and directory services
\n* Built as a layer over DNS, LDAP, and so on
\n* Used to lookup JEE objects: EJB home stubs, JDBC data source, JMS connection factories and destinations, RMI stubs<\/p>\n

JTA<\/h3><\/span>\n

* Java API for demarcating transactions within a program<\/p>\n

\"\"<\/a><\/h6><\/span>\n

JMS<\/h3><\/span>\n

* Java API for accessing message oriented middleware (MOM)
\n* Supports
\n– point-to-point
\n– publish-subscribe
\n– guaranteed message delivery
\n– transaction participation
\n– dynamically configurable services
\n– application or system scoped services
\n– interop with other messaging systems<\/p>\n

JAAS<\/h3><\/span>\n

* Java based security management framework
\n* Support
\n– SSO (single sign on)
\n– PAM (pluggable authentication module)
\n* Enables flexible control over authorization based on
\n– users
\n– groups
\n– roles<\/p>\n

JMX (Java Management Extension)<\/h3><\/span>\n

* Defines a standard infrastructure to manage a device from Java programs
\n* Decouples managed service from management tools (much like JDBC decouple data service from RDBMS)
\n* Based on MBeans which are building blocks of JMX<\/p>\n

JCA (Java Connector Architecture)<\/h3><\/span>\n

* JCA connects EIS with JEE container through resource adapters
\n* Resource adapters can be deployed in a RAR (resource adapter archive)<\/p>\n

\"\"<\/a><\/h6><\/span>\n

Client Application<\/h3><\/span>\n

* Client application interacts with WLS through:
\n– JRMP\/T3: RMI implementation
\n– IIOP:
\n– jCOM: allows bidirectional access between Java\/J2EE objects and Microsoft Active X components
\n* Client types:
\n– Stand-alone Java applications
\n– Applets within a browser<\/p>\n

Web Client<\/h3><\/span>\n

* A web client interacts with WLS via HTTP using servlets or JSP
\n* Two types of web clients:
\n– Web browser
\n– Web services<\/p>\n

Proxy Server<\/h3><\/span>\n

* Forward requests to other machines
\n* Can be used as a level of indirection and security (decouples client from actual servers)
\n* Can be used to load balance a system
\n* A reverse proxy is a web page cache<\/p>\n

Web Server<\/h3><\/span>\n

* Provides web content
\n* Communicate via HTTP, FTP, etc.
\n* Can also handle CGI requests
\n* Also can proxy some requests to app servers<\/p>\n

Fire Walls<\/h3><\/span>\n

* Provides filtering, authentication, authorization services
\n* Help keep out hackers
\n* Map port requests
\n* Also can act as proxy servers
\n* Can decrease back-end network activity<\/p>\n

App Servers<\/h3><\/span>\n

* Provide run time engine for deployed applications
\n* Handles heavier processing chores than web servers<\/p>\n

Web Application Server Configuration<\/h3><\/span>\n
\"\"<\/a><\/h6><\/span>\n

Next >> Installing Oracle WebLogic Server 11g<\/a><\/p>\n

[mv_include id=’3268′]<\/p>\n","protected":false},"excerpt":{"rendered":"

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