by Srinath Perera, Ajith Ranabahu 07/27/2005 Until recently, web service interactions were solely synchronous and request-response in nature. However, it soon became clear that the synchronous request-response type of interaction is a very small subset of messaging scenarios. Messaging is very important in constructing loosely coupled systems, and as a result, this limitation is critical. Web service specifications, such as WS-addressing and WSDL, have incorporated the concepts of messaging, and lay the foundation to cover a wider range of messaging scenarios. The Apache Axis2 architecture assumes neither one message exchange pattern, nor synchronous/asynchronous behavior. Web Services Messaging with Apache Axis2: Concepts and Technique
Making Sense of all these Crazy Web Service Standards It has been eight years now since SOAP and WSDL (Web Service Description Language) were introduced as standards to facilitate communication and data exchange between heterogeneous systems. Since then, a flurry of protocols, collectively named WS*, have also been introduced as extensions to SOAP (and in some cases WSDL) to facilitate specific communication requirements and scenarios. The categories of WS* are broad, and it has reached a point where the sheer number of standards is so great that despite a core set being implemented in many platforms, many in the web service community are confused about which standards they should care about, when and why. Furthermore, concerns over interoperability prevail, as each standard traverses its lifecycle of development, early adoption, ratification and update.
Today’s shift toward composite application deployment and development techniques, including SOA, BPM, Cloud and SaaS applications, along with the popularity of agile development techniques, has had the unintended consequence of increasing application environment costs and risks due to increasing complexity and frequent unavailability of needed systems. Delivery solutions from CA Technologies — which include service virtualization, continuous delivery and data mining — address these challenges with innovative technology for optimizing application development and testing, increasing the velocity of enterprise application delivery, while simultaneously driving quality and reducing the cost of innovation. Understanding Service Virtualization Why CA LISA® Release Automation SOA Testing, Validation & Virtualization - iTKO LISA softwar
Listen to the podcasts that accompany this site: Part I - Part II The key to getting the most out of SOA lies within the knowledge of how to create "truly" service-oriented solution logic. That knowledge has been documented as part of the service-orientation design paradigm.
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