Version 9.6
 —  EntireX BS2000/OSD Batch RPC Server  —

Introduction to the BS2000/OSD Batch RPC Server

The EntireX BS2000/OSD Batch RPC Server allows standard RPC clients to communicate with RPC servers on the operating system BS2000/OSD. It supports the programming languages COBOL and C.

This document covers the following topics:


Introduction to the BS2000/OSD Batch RPC Server

This section covers the following topics:

Worker Models

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RPC requests are worked off inside the RPC server in worker threads, which are controlled by a main thread. Every RPC request occupies during its processing a worker thread. If you are using RPC conversations, each RPC conversation requires its own thread during the lifetime of the conversation. The BS2000/OSD Batch RPC Server provides two worker models:

Inbuilt Services

BS2000/OSD Batch RPC Server provides the following services for ease-of-use:

Extractor Service

The Extractor Service is a prerequisite for remote extractions with the IDL Extractor for COBOL and IDL Extractor for PL/I. See Extractor Service under BS2000/OSD for more information.

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Deployment Service

The Deployment Service allows you to deploy server mapping files (SVM files) interactively using the Deployment Wizard (see Server Mapping Deployment). On the RPC server side, the SVM files are stored in an ISAM file as the container. See Deploment Service under BS2000/OSD for configuration information.

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SMH Listener Service

With the SMH Listener Service you use the System Management Hub to monitor the RPC server. See Administering the EntireX RPC Servers using System Management Hub under UNIX | Windows.

The SMH Service is switched on if the parameter smhport is set. See parameter smhport under Configuring the RPC Server.

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Usage of SVM Files

The BS2000/OSD Batch RPC Server is optimized to call COBOL servers originally written for Fujitsu Siemens. For this purpose, the RPC server requires in many situations a server mapping file (SVM).

SVM files contain COBOL-specific mapping information that is not included in the IDL file and therefore not sent by an EntireX RPC client to the RPC server. See also When is an SVM File Required? under SVM Files.

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The RPC server marshalls the data in a two-step process: the RPC request coming from the RPC client (Step 1) is completed with COBOL-specific mapping information taken from the SVM file (Step 2). In this way the COBOL server can be called as expected.

The SVM files are retrieved as a result of the IDL Extractor for COBOL extraction process and the COBOL Wrapper if a COBOL server is generated.

Note:
SVM files are used for COBOL only.

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