Monthly Archives: December 2011

Use JAX-WS message handlers to address cross-cutting concerns: Caching

SOA adoption is often accompanied by the recognition of the need for a revamped approach for handling cross-cutting concerns such as logging, diagnostics and monitoring, security, error detection and reporting, performance etc.  All the shiny new services being developed on … Continue reading

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Semantic web-service descriptions using OWL-S

In this post  I described some of the problems with WSDL as a language to describe web-services. The key problem being that WSDL is a specification with focus on describing a web-service interface rather than the semantics of the web-service. … Continue reading

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Think REST – GET can be a very powerful verb

The basic idea about REST is to think of your system as a collection of resources (and their representations) which transition on one state to another when acted upon by messages. REST is a architecture style which applies constraints such … Continue reading

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Criticism of AMQP

One of my previous blog entries was about AMQP a new wire-level messaging protocol. Today I came across a very thorough criticism of the protocol by one of its authors A very long article, but of key points being made against … Continue reading

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Examples of xsd:appinfo

Continuing from my previous post, here a few real-world usecases where the xsd:appinfo is  put to good use. For example, using xsd:appinfo you can override the default XML Schema to Java conversion logic applied by JAXB. <xsd:simpleType name=”ZipCodeType”> <xsd:annotation> <xsd:appinfo> … Continue reading

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Leverage XSD annotations to build richer XML schema

In the service-oriented enterprise IT landscape, XML schema is the default language used to describe information models. Products and IT departments today care less about the domain-model, and view the systems as a collection of services, orchestrated to perform business … Continue reading

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