Dynamic Data: Access Union Discriminators

Submitted by gianpiero on Wed, 05/29/2013 - 15:57

Concept

Unions in IDL are mapped to structs in C and C++, so that Connext will not have to dynamically allocate memory for unions containing variable-length fields such as strings or sequences. To be efficient, the entire struct (or class in C++/CLI) is not sent when the union is published. Instead, Connext uses the discriminator field of the struct to decide what field in the struct is actually sent on the wire.

Example Description

In this example we illustrate how to access the discriminator of a Union using the Dynamic Data API.

First, we create the TypeCode for the Union. Then, we create a Dynamic Data instance of it and finally, we show how to access the discriminator.

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Comments

sneha

Fri, 10/16/2015 - 02:03

Please let me know any example for publishing union using luafile