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What is Service Data Object?
SOA creates an environment where different types of data must work together. This makes application development complex. Service Data Object(SDO), provides a very simple programming model that addresses this issue. The key high level advantages of SDO are:
- Uniform access to data from heterogeneous sources which could be XML, RDB, POJO, SOAP, etc.
- SDO provides both a static (or strongly typed) programming model and a dynamic (or loosely typed) programming model. This provides a simple programming model without sacrificing the dynamic model needed by tools and frameworks.
- Provides Meta-data for easy introspection of data types
- Supports a disconnected model, whereby data can be retrieved from a data source via Data Access Service. The data can be modified by a client with change tracking, and applied back to the data source.
- SDO programming model is language neutral
Tuscany implements SDO in Java and in C++. A PHP version of SDO is also available.
SDO specification can be found at the Open Service Oriented Architecture website.
Learn more about SDO
- What is SDO? Part One: The value of many of the facets of SDO,Java Developer Journal, article by Kelvin Goodson & Geoffrey Winn
- What is SDO? Part 2 - A standardized approach to data programming particularly well suited to SOA,Java Developer Journal, article by Kelvin Goodson & Geoffrey Winn
- Varous white papers and presentations about SDO can be found on www.osoa.org SDO resoruces page.