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Guides and Samples

We intend to build up this collection of downloadable articles and samples. If you need further information on any items here or would like to see something added please contact us by email at alcs@uk.ibm.com.

  1. IPCS REXX execs for ALCS
  2. OCTM User Guide and Sample application
  3. System Takeover Facility
  4. High Load Monitor
  5. Allocatable Pool Presentation
  6. MQ Guide
  7. ALCS World Wide Web Server User Guide
  8. WTO Exit
  9. MQ Bridge Guide
  10. ALCS Performance Monitor
  11. VFA buffers above the 2GB bar
  12. Websphere Application Server optimized local adapter

1. IPCS REXX execs for ALCS

To view system dumps the MVS tool used is IPCS, for which, REXX execs can format areas of storage. We have developed some IPCS REXX execs which may be used and we provide them here on an 'as is' basis. If you would like to try the execs then please download the files from the following links.

For ALCS 2.4.1 IPCS execs click here and for the documentation  click here

For ALCS 2.3.1, after the Performance Monitor APAR, IPCS execs click here and for the documentation  click here

For ALCS 2.3.1, prior to Performance Monitor APAR, IPCS execs click here and for the documentation  click here

The execs are not rigorous and may require tailoring for your installation.

2. OCTM User Guide and Sample application

OCTM is an ALCS system facility that provides an api (COMTC) through which an end user system can alter the communication definitions. Information on OCTM along with a description of a sample application are described in a manual available below.

For the sample application click here

For the OCTM User Guide  click here

For ALCS 2.4.1 users with the Websphere Application Server (WAS) terminal support (AK83249) use the updated OCTM User Guide  click here

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3. System Takeover Facility

ALCS 2.3.1 added features that enable the setting up of an automated standby system. This guide discusses these features and how to exploit them.

For the System Takeover Facility Guide  click here

4. High Load Monitor

When ALCS experiences a high work load, it is sometimes difficult to find out what the high load consists of.

The high load monitor is an update to ALCS monitor exit USRTIM2 to detect a high load situation and place information on the diagnostic file about each ECB in the system. An included offline program reads the diagnostic file and generates a simple report.

For the High Load Monitor Guide  click here

5. Allocatable Pool Presentation

This presentation gives an overview of the concepts of allocatable pool. Why it is needed, how to migrate to it and how to expand pool once migration to Type 2 long term pool is complete.

For the presentation  click here

6. MQ Guide

This document describes the set up and use of Websphere MQ with ALCS. It is aimed at being a quick start guide for ALCS systems programmers and includes sample applications.

For the guide  click here

7. ALCS World Wide Web Server User Guide

This book provides an introduction to the functions of the Airline Control System (ALCS) World Wide Web server (or just the ALCS Web server). It also explains how you use the ALCS Web server.

For the book  click here

8. WTO Exit

This package contains an example MVS Write to Operator exit. In this example the exit is used to invoke a CLIST when an ALCS realtime sequential file is deallocated. This could be developed to manage the archiving of these files to ensure that space is available for subsequent files.

The package is a zip file click here to download.

9. MQ Bridge Guide

This package contains an description of the ALCS MQ Bridge. The Bridge uses the MQ support in ALCS to provide connectivity to current ALCS applications from remote systems such as Web servers. It allows MQ messages received on request queues to be formatted and passed on to the applications as if they came from ordinary terminal devices.

For the ALCS 2.3.1 guide  click here

For the ALCS 2.4.1 guide  click here

10. ALCS Performance Monitor

The ALCS Performance Monitor satisfies User Group requirement ATC0262, which asked for the Performance Monitor developed by Jorge Widmar to be incorporated into ALCS. The documentation on the Performance monitor is in the standard manuals.

To assist those implementing the Performance Monitor for the first time we have collated the documentation from the standard manuals into a small document.

The document is a pdf file   click here to download.

11. VFA buffers above the 2GB bar

A guideline for migrating to an ALCS system with VFA buffers above the bar.

The document is a pdf file   click here to download.

12. Websphere Application Server optimized local adapter

With WAS OLA support, you can create a web service to represent business logic implemented as a servlet or an Enterprise Java Bean (EJB). The application that gets control for the web service call can simply delegate to a connector call to ALCS. Using this approach, ALCS applications can readily be exposed externally as web services because all the necessary WAS external support and administration is in place.

  • How to use the WAS Bridge or make OLA calls in ECB controlled programs - User Guide
    The document is a pdf file   click here to download.

  • WAS Sample Application Guide includes a description of message flows, usage scenarios and sample servlet application.
    The document is a pdf file   click here to download.
    For the sample source code as a zip file click here to download.