SOA support in J2EE

• Platform overview• Primitive SOA support• Support for service-orientation principles• Contemporary SOA support

Platform overview

Key Java specifications

• Java 2 Platform Enterprise Edition Spec• Java API for XML-based RPC (JAX-RPC)• Web Services for J2EE

Architecture components

• Java Server Pages (JSPs)• Struts• Java Servlets• Enterprise JavaBeans (EJBs)

Runtime environments

• EJB container• Web container

Programming languages

• Java• Various development tools

APIs

• Java API for XML Processing (JAXP)• Java API for XML-based RPC (JAX-

RPC)

Service providers

• JAX-RPC Service Endpoint• EJB Service Endpoint• Port Component Model– Service Endpoint Interface (SEI)– Service Implementation Bean

Service requestors

• Generated stub• Dynamic proxy and dynamic invocation

interface

Service agents

• Tasks• Handlers

Platform extensions

• IBM Emerging Technologies Toolkit• Java Web Services Developer Pack

Primitive SOA support

• Service encapsulation• Loose coupling• Messaging

Support for service-orientation principles

• Autonomy• Reusability• Statelessness• Discoverability

Contemporary SOA support

• Based on open standards• Supports vendor diversity• Intrinsically interoperable• Promotes federation• Architecturally composable

• Extensibility• Supports service-oriented business modeling• Logic-level abstraction• Organizational agility and enterprise-wide

loose coupling