Java Enterprise And Mobile Application

Java Enterprise and Mobile application

Enterprise applications  The

J2EE platform specification provides technologies that support multi-tier, enterprise applications.

Enterprise application  In

an enterprise application, the application's business logic is contained in a middle layer between the user interface and system services.

The J2EE platform uses a multitiered distributed application model

Figure 1-1 Multitiered Applications

Multitiered Applications    

Client-tier components run on the client machine. Web-tier components run on the J2EE server. Business-tier components run on the J2EE server. Enterprise information system tier software runs on the EIS server.

Dissection of each layer

Enterprise information system (EIS)  Oracle  Mainframes  SAP  People

Etc.,

Soft

Business Layer (Enterprise Bean)  Session – –

Statefull Session Bean Stateless Session Bean

 Entity – –

Bean

Bean

BMP CMP

 Message

Driven Bean (MDB)

Web tire  Servlets  JSP

Application client

J2EE Containers

Packaging  JAR’s  WAR’s  EAR’s

J2EE API’s            

Enterprise JavaBeans Technology 2.0 JDBC API 2.0 Java Servlet Technology 2.3 JavaServer Pages Technology 1.2 Java Message Service 1.0 Java Naming and Directory Interface 1.2 Java Transaction API 1.0 JavaMail API 1.2 JavaBeans Activation Framework 1.0 Java API for XML Processing 1.1 J2EE Connector Architecture 1.0 Java Authentication and Authorization Service 1.0

Career  Developer  Team

Lead  Arc’tect / Tech Lead

Mobile Applications

Mobile Applications  Small

device  Memory constrained  Could be mobile

J2ME  WORA

for small device.  Java for small device.

Small device  Pagers  Mobile

Phones  Personal digital assistance (PDA’s)  Set-top boxes

J2ME  Configuration –

Specific kind of device based on memory and processing power.

 Profile –

It is based on configuration and specific to a device.

Target device of each edition

Demo