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Introduction to Java 2 Enterprise Edition

Introduction to Java 2 Enterprise Edition. About myself Neutrinos, Cancer Research, IT Applications Today’s topic: J2EE Context Advantages Components Architecture Lecture method Informal, Interactive. Context of J2EE . Role of J2EE in IT Applications Brief History Role of Java in IT

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Introduction to Java 2 Enterprise Edition

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  1. Introduction to Java 2 Enterprise Edition • About myself • Neutrinos, Cancer Research, IT Applications • Today’s topic: J2EE • Context • Advantages • Components • Architecture • Lecture method • Informal, Interactive

  2. Context of J2EE • Role of J2EE in IT Applications • Brief History • Role of Java in IT • Role of Telecommunications • Comparison with other technologies • .NET

  3. Advantages • Standard architecture, • greater choices in tools, servers, etc • Scalability • Distributed computing • Developer productivity • Object Oriented language • Run-time configurability

  4. Advantages (continued) • Portability • Works on many platforms • Access to existing systems • JDBC, JNDI, JNI, Connectors • Flexibility in security, transactions, etc.

  5. Common Components of J2EE 1.3 • ·HTTP 1.0 and HTTPS (HTTP 1.0 over SSL 3.0) • Existed before, is a Prerequisite • ·JavaServer Pages 1.2 and Servlet 2.3 API • Add dynamism to the web • ·EJB 2.0, Enterprise JavaBeans • Allow partitioning into tiers

  6. Connection APIs • JDBC 2.0 • Database operations • JNDI 1.2, Java Naming and Directory Interface • Locating resources • JCA 1.0, J2EE Connector Architecture • Access to enterprises applications like ERP • JavaIDL, • Java 2 access to CORBA services • JTA 1.0.1 and JTS, Java Transaction API and Service

  7. Web Services • JAXP 1.1, Java API for XML Processing • JAX-RPC, Java API for XML-based RPC • JAXR, Java API for XML Registries • JAXB, Java Architecture for XML Binding • JAXM, Java API for XML Messaging

  8. Other Services • JAAS 1.0, Java Authentication and Authorization Service • JavaMail 1.2 and JAF 1.0 • Java RMI • JMS 1.0.2, Java Message Service for asynchronous exchanges

  9. MVC Architecture • Model • Application Data and Business Rules • View • Rendering of model contents • Controller • Translate user input to model actions

  10. MVC Actions • Model • Notify view about data updates • View • Change rendering as needed • Controller • Select view to be rendered • Based on event notifications and method invocations

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