SOAReference.com

Blogger D. Nickull discusses the SOA anti-patterns: Service Composition and Composite Applications. He writes, “The SOA community has once again used poor judgment in terms of coining titles for aspects of SOA, namely Service Composition and Composite Applications. If these are truly built on an SOA infrastructure, most of them are in fact Service Aggregations and Aggregate Applications. Let me explain where the terms come from and what they really mean.”

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I just read a really good article titled “Bridging the gap between BI & SOA” on InfoQ. The article highlights the “impedance mismatch” between SOA and BI, with SOA wanting to isolate internal data behind interfaces and BI wanting to have an intimate understanding of data. The article takes to the eventual conclusion of synergy between BI and SOA.

Read the full article here.

Getting Fast Wins from SOA without compromise Governance is considered an advanced topic in SOA and becomes increasingly essential as you move to increasingly complex, federated and large scale SOA implementations. It is also considered to be something for sophisticated implementers and requires a lot of best practices and patterns. Paradoxically, analysts including Frank Kenney of Gartner strongly recommend instituting Governance from your first production service.

Read the full article

In his blog article titled “Thinking SOA..”, David Linthicum discusses the disconnect with many in Enterprise Architecture and SOA. According to him, there are many enterprise architects who don’t get SOA and may not even have begun to think SOA. Folks who have been doing traditional Enterprise Architecture fall back to their knowledge of the core concepts of Enterprise Architecture which is really different from thinking in terms of SOA.

This disconnect probably leads to many enterprises not realizing the benefits of SOA.

Read the full article

GlassFish v2 application server was released today with new and improved scalability and optimization. GlassFish is an open source J2EE application server and v2 is expected to be about 60% faster than the v1. A feature called the “Project Metro” provides interoperability between Java and .NET web services. The product integrates with open ESB and supports the JBI (Java Business Integrtion) spec.

Other key features of GlassFish v2:
- Improved performance
- Clustering
- Project Metro
- Centralized administration
- NetBeans IDE Integration

Watch this video on SOA - Service Oriented Architecture Introduction from Beth Gold-Bernstein. Beth Gold-Bernstein is vice president of strategic services at ebizQ, the online portal for e-business integration. A recognized expert in integration technologies and technical architectures, she has worked with financial institutions, retailers, and manufacturers to plan, design, and implement large-scale distributed systems. Formerly director of business integration technologies at Hurwitz Group, she is coauthor of Designing Enterprise Client/Server Systems

In this video, Beth takes you to a definition of SOA that is easy to grasp and then to the benefits of it.

In his article titled “The Lego Model of SOA”, author Jason Bloomberg describes SOA in terms of Lego blocks. According to Bloomberg, the four characteristics of SOA are interoperability, robustness, loose coupling and reusability which are all demonstrated by Lego blocks. Lego blocks have standard interfaces or connectors which allows you to connect it to any other Lego block. Thus they are interoperable. Lego Blocks are unbreakable, thus making them robust. Lego Blocks can be used to build different things by assembling them. Mr. Bloomberg goes on to illustrate the downsides of the characteristics of SOA using Lego Blocks as well. Read the detailed article using the link below:

SOA explained using a LEGO analogy by Zapthink

The Object Mentor blog has an article titled “What is SOA, really?” in which the author explains SOA as the process of sequestering the core business functions into independent services that don’t change frequently. The author uses the analogy of dentists selling cleanings every 6 months, gas stations selling gasoline or restaurants selling meals as the respective core services. These core services seldom change. The things that change very frequently are things like prices, tax rates, etc. By building core services building blocks, the frequently changing services can be assembled when the business demands. Read the detailed article using the link below:

Soa explained by Object Mentor

IONA’s Steve Vinoski has used the Home Theater metaphor to describe SOA on his blog. Read the detailed article using the link below:
SOA explained via a Home Theater metaphor

There are numerous other analogies and metaphors for SOA on the internet. Let us know which one according to you makes the most sense.

Apache CXF is an open source web services framework that is a result of the merger of two projects, Celtix from IONA and Codehaus XFire from Codehaus. The framework allows developers to build and develop web services using frontend programming API’s such as JAX-WS, TCK etc. JAX-WS is a technology for developing SOAP based and REST Java-based web services and replaces JAX-RPC.

Developers can chose to start building from contract using WSDL or directly from Java code. On the backend, CXF supports a variety of transport protocols such as JMS, HTTP and JBI with message formats of SOAP, XML, REST, etc. Non-XML bindings such as JSON and CORBA are also supported using the pluggable architecture of CXF.

Services can be deployed in light weight containers such as Tomcat or Spring-based containers. JBI, SCA and J2EE support allows deployment into ServiceMix, OpenESB, Tuscany, JBoss, Weblogic, etc.

For more information on Apache CXF, visit the Apache website

Have you read about Apache Camel? Apache Camel is an open source rule-based routing and mediation engine that implements most of the Enterprise Integration Patterns as POJOs. It solves the problem of taking data from various sources or components such as files, databases, web services, message queues, etc and connecting them to other systems after aggregation and tranformations.

Routing rules can be configured using regular Java code using the entry points “CamelContext” and “RouteBuilder”. RouteBuilder is derived from Java DSL or Domain Specific Language that allows your IDE to smart complete the code as it is typed. The Routing rules can alos be configured using Spring and XML Configuration file.

Apache Camel was born out of other Apache projects such as Apache ActiveMQ and Apache ServiceMix.

Read more about Apache Camel