The InterSystems Callout Gateway (implemented in the InterSystems IRIS™ $ZF functions) allows you to invoke external programs and system services from InterSystems IRIS. It also provides a way to integrate your custom code into InterSystems IRIS.
This book addresses the following topics:
Introduction — introduces concepts important to understanding the rest of this book, summarizes the capabilities of the InterSystems Callout Gateway, and provides links to samples and other resources.
Issuing Operating System Commands — describes how to spawn a child process that can be used to access operating system commands and services.
Creating an InterSystems Callout Library — describes how to create a Callout shared library with functions that can be invoked from InterSystems IRIS. Code can be written in any language that supports C/C++ calling conventions.
