RSC/MP 7.2 Programming Manual

Introduction to Remote Server Call (RSC/MP)
HP NonStop Remote Server Call (RSC/MP) Programming Manual—522360-004
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Application Program Interface
RSC/MP provides an API and a communications transport on client workstations that
support communication between the workstation and the host system.
The following subsections describe the RSC/MP components on the client workstation.
Application Program Interface
The RSC/MP application program interface (API) provides workstation applications
with a standard interface for communicating with the NonStop system. The API is
distributed as a dynamically linked library (DLL) for Windows 32-bit applications and as
a shared library for UNIX applications. The API consists of function calls for performing
these application tasks:
•
Establishing and closing a logical connection between a workstation and the
NonStop system.
•
Starting and ending a session between an application and the Transaction Delivery
Process (TDP) on the NonStop system.
•
Controlling Transaction Management Facility (TMF) protection for beginning,
ending, and aborting TMF transactions on the NonStop system.
•
Sending data to and receiving data from application server processes on the
NonStop system.
•
Obtaining error information about RSC/MP function calls.
•
Receiving and replying to unsolicited messages sent to an application.
•
Formatting data.
•
Synchronizing workstations with the NonStop system clock.
See Section 3, API Functions and Options, for details about the RSC/MP API and API
options. See the Remote Server Call (RSC/MP) Installation and Configuration Guide
for information about installing the RSC/MP API.
Communications Subsystems
The RSC/MP communications subsystem (CSS) resides on the workstation. A CSS
communicates with the TDP on the NonStop system. The RSC/MP CSS consists of
the RSC/MP I/O Manager and the RSC/MP Transport processes.
See the Remote Server Call (RSC/MP) Installation and Configuration Guide for
information on installing the RSC/MP I/O Manager and Transport on the workstation.
Note. In versions prior to RSC/MP, Piccolo had to be installed as a separate product for use
as the RSC Transport. The Piccolo product is now integrated into RSC/MP and is called the
RSC/MP Transport.