DataService: one kind of special service, which expose interface for data stored in sources such as relational databases, CSV files & MS-Excel files. DataServices plays a vital role on IT strategy like SOA. Any organization have to have expose their master data to any enterprise application. Through data services a company enables to have high-quality, consistent data at the right place at the right time. In practical, data services exposes data, represented as Entity Data Model (EDM) objects, via web services accessed over HTTP. The data can be addressed using a REST-like URI. The Astoria service, when accessed via the HTTP GET method with such a URI, will return the data. The web service can be configured to return the data in either plain XML, JSON or RDF+XML. For more information see the following article about data services . It's not hard to create and maintain data service on standard way, a lot of ORM framework like hibernate, iBatis, toplink even low level jdbc framew...
A journey for designing high-performance software based on NoSQL, BigData and Microservices