CICS Command Level Programming

This course teaches CICS command level programming on CICS version 6.1. This course is also available at previous releases, please ask for details.

• IBM CICS COBOL Programmers.
• Batch COBOL Programmers moving into an IBM CICS environment.

Attendees should ideally have some experience of COBOL programming in a Batch
environment.

Upon completion, attendees will be able to:

• Confidently code Command Level CICS Programs
• Understand how to use File Control, Temporary Storage and Transient Data
• Describe how to use time dependent commands, and how to link between programs
• Understand how to deal with error conditions
• Use CEDA to define their program to CICS and to use CEDF to test and debug their programs

An Introduction to CICS Web Services is included. Basic Mapping Support is included for 3270 screen design. The attendees will have access to a CICS/TS 6.1 System and will write a Command Level program, updating it to handle recovery and code a BMS map.

DAY 1

Introduction to CICS Programming

• Basic CICS Terminology and Functionality
• Command level Syntax
• CICS and COBOL considerations
• CICS Translator and Co-Processing

Exception Conditions and access to System Information

• How to deal with Exceptional Conditions
• The Handle Condition Command
• The Ignore Condition Command
• RESP/RESP2
• The Exec Interface Block
• The Address Command
• The Assign Command

Terminal Control Commands

• The Receive Command
• The Send Command
• The Issue Print Command
• The Issue Disconnect Command
• Dealing with Function keys
• DFHAID
• EIBAID
• The Handle Aid Command
• Screen Attributes
• DFHBMSCA

Basic Mapping Support

• How to code a map
• DFHMSD
• DFHMDI
• DFHMDF
• Symbolic Map
• Screen Handling
• The Receive Map Command
• The Send Map Command
• The Send Text Command
• The Send Control Command
• Printing

DAY 2

File Control Commands

• The Read Command
• The Write Command
• The Rewrite Command
• The Delete Command
• The Unlock Command
• The Startbr Command
• The Readnext Command
• The Readprev Command
• The Resetbr Command
• The Endbr Command
• CICS and VSAM and RLS
• Recoverable Resources
• Record Locking

Control Operations

• Interval Control
• Time Dependant Operations
• The Start Command
• The Retrieve Command
• The Delay Command
• The Cancel Command
• The Asktime Command
• The Formattime Command

Task Control

• The Suspend Command
• The Enq Command
• The Deq Command

Program Control

• Conversational vs Pseudo Conversation
• Passing Data – Commarea, Channels/Containers
• Hierarchical Processing
• The Link Command
• The XCTL Command
• The Return Control
• The Load Command
• The Release Command

Temporary Storage Control

• What is Temporary Storage?
• The Writeq TS Command
• The Readq TS Command
• The Deleteq TS Command

Transient Data Control

• What is Transient Data?
• Remote Printing
• Automatic Transaction Initiation
• External Logging/CICSlog
• The Writeq TD Command
• The Readq TD Command
• The Deleteq TD Command

Journal Control

• What is Journalling?
• The Write Journalnum Command
• The Wait Journalnum Command
• Storage Control
• Dynamic Storage
• The Getmain Command
• The Freemain Command

Defining Applications to CICS

• What are CICS Resources
• Resource Definition Online
• DFHCSD
• CEDA
• CEDB
• CEDC
• Defining Transaction/Programs/Mapsets/Files
• DFHCSDUP
• Defining the Temporary Storage Table

DAY 3

Workshop. Building a Map and a Command Level Application.

CICS Application Transactions

• CICS Execution Diagnostic Facility – CEDF
• How to test & debug using CEDF
• View Working Storage
• Change Commands and set Breakpoints
• CICS Enhanced Command Interpreter – CECI
• Syntax check any Command level Command
• Execute any Command level Command online
• CICS Enhanced Trace – CETR
• How to control tracing
• Internal & Auxiliary
• CICS Messages and Codes – CMAC
• Obtain explanation of all CICS Messages
• Obtain explanation of all CICS Abend Codes

DAY 4
Abnormal Termination & Recovery

• Why Transactions Abend
• Dynamic Transaction Backout
• Emergency Restart
• What is available for recovery
• The Handle Abend Command
• The Abend Command
• The Enter Tracenum Command
• The Dump Transaction Command
• What is a Logical Unit of Work
• The Syncpoint command
• The Syncpoint Rollback Command

Workshop. Testing the Application and Using Recovery

DAY 5
CICS/DB2 Interface

• The Attachment Facility
• The DSNC Transaction
• Connection threads
• How DB2 is defined to CICS
• Entry Threads
• Program and Package preparation
• Bind

CICS/TS Web Services

• Web support overview
• Using TCPIPSERVICE definition
• Using DOCTEMPLATE definition
• Using URIMAP definition
• PIPELINE definition described

Pipeline message handlers

• Understanding the Assistant Utilities
• Converting the Language Structure to XML/SOAP
• Converting the Language Structure to JSON
• Building WSDL and WSBIND and JSON Schemas