PPDS Dual Interface
The objects and methods exposed by the ppdscom PPDS native API is the most flexible way of interfacing to the calculation engine.
These objects have DUAL interfaces and can thus be used from within all common programming languages, including scripting languages (VB Script and JavaScript) found in web applications. The objects are written as an in-process DLL (runs in the same process as the user’s code), using the apartment threading model, and they communicate using COM/DCOM with an out of process PPDS server, which may reside on the same machine as the user’s code, or be hosted remotely.
Overview diagram of the PPDS API Objects
The Session object forms the root of the object tree. You must create one of these and use it to connect to a PPDS Server before you can do anything else. Typically this object is then used to create stream and component objects which can then perform calculations which return properties. All objects created by the Session, use the PPDS server to which the session is connected.
Screenshot of the ObjectBrowser showing the objects and methods within the PPDS Dual Interface
The current PPDS API provides the flexibility to provide validated physical property data ranging from a simple point calculation to a complete interface.
Some examples of the type of application that can be developed using the PPDS Dual Interface are discussed in the Bespoke Solutions section
Screenshot of script based flash calculation being debugged.
There is an extensive manual detailing the interface calls, with example code snippets to illustrate its operation.