Author: Matykiewicz, J.L.
Paper Title Page
WEPKN005 Experiences in Messaging Middleware for High-Level Control Applications 720
 
  • N. Wang, J.L. Matykiewicz, R. Pundaleeka, S.G. Shasharina
    Tech-X, Boulder, Colorado, USA
 
  Funding: This project is funded by the US Department of Energy, Office of High Energy Physics under the contract #DE-FG02-08ER85043.
Existing high-level applications in accelerator control and modeling systems leverage many different languages, tools and frameworks that do not interoperate with one another. As a result, the community has moved toward the proven Service-Oriented Architecture approach to address the interoperability challenges among heterogeneous high-level application modules. This paper presents our experiences in developing a demonstrative high-level application environment using emerging messaging middleware standards. In particular, we utilized new features such as pvData, in the EPICS v4 and other emerging standards such as Data Distribution Service (DDS) and Extensible Type Interface by the Object Management Group. Our work on developing the demonstrative environment focuses on documenting the procedures to develop high-level accelerator control applications using the aforementioned technologies. Examples of such applications include presentation panel clients based on Control System Studio (CSS), Model-Independent plug-in for CSS, and data producing middle-layer applications such as model/data servers. Finally, we will show how these technologies enable developers to package various control subsystems and activities into "services" with well-defined "interfaces" and make leveraging heterogeneous high-level applications via flexible composition possible.
 
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