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CICS ACTIVITY ID - Activity Identification

CICS ACTIVITY ID provides activity identification capabilities for programs and transactions. It enables programs to identify activities, track activity data, and handle activity identification in CICS environments.

What is CICS ACTIVITY ID?

CICS ACTIVITY ID is a command that allows programs to identify activities in the system. It provides activity identification capabilities, activity tracking, and activity processing for CICS applications.

Command Syntax

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EXEC CICS ACTIVITY ID
    [ACTIVITY(activity-name)]
    [ID(activity-id)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

  • ACTIVITY(activity-name) - Name of activity to identify
  • ID(activity-id) - ID of activity to identify
  • RESP(response-code) - Response code variable

Activity ID Types

Transaction IDs

Transaction ID types

  • • TRANSACTION ID - Transaction activity IDs
  • • TASK ID - Task activity IDs
  • • PROCESS ID - Process activity IDs
  • • THREAD ID - Thread activity IDs

Program IDs

Program ID types

  • • PROGRAM ID - Program activity IDs
  • • MODULE ID - Module activity IDs
  • • ROUTINE ID - Routine activity IDs
  • • FUNCTION ID - Function activity IDs

Resource IDs

Resource ID types

  • • RESOURCE ID - Resource activity IDs
  • • FILE ID - File activity IDs
  • • DATABASE ID - Database activity IDs
  • • NETWORK ID - Network activity IDs

System IDs

System ID types

  • • SYSTEM ID - System activity IDs
  • • REGION ID - Region activity IDs
  • • APPLICATION ID - Application activity IDs
  • • SESSION ID - Session activity IDs

Programming Examples

Basic Activity Identification

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVITYID01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-NAME PIC X(8) VALUE 'MYACT001'.
       01  ACTIVITY-ID PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Identifying activity'
           DISPLAY 'Activity: ' ACTIVITY-NAME
           
           EXEC CICS ACTIVITY ID
               ACTIVITY(ACTIVITY-NAME)
               ID(ACTIVITY-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Activity identified successfully'
               DISPLAY 'Activity ID: ' ACTIVITY-ID
           ELSE
               DISPLAY 'Activity identification failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Activity ID Processing

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVITYID02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-NAME PIC X(8).
       01  ACTIVITY-ID PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  ACTIVITY-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-ACTIVITIES PIC S9(2) COMP VALUE 4.
       01  ACTIVITY-STATUS PIC X(1).
       01  ACTIVITY-LIST.
           05  ACTIVITY-ITEM OCCURS 4 TIMES.
               10  ACTIVITY-ID PIC X(8).
               10  ACTIVITY-NAME PIC X(8).
               10  ACTIVITY-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-ACTIVITIES
           PERFORM IDENTIFY-MULTIPLE-ACTIVITIES
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-ACTIVITIES.
           MOVE 'ACT001' TO ACTIVITY-NAME(1)
           MOVE 'ACT002' TO ACTIVITY-NAME(2)
           MOVE 'ACT003' TO ACTIVITY-NAME(3)
           MOVE 'ACT004' TO ACTIVITY-NAME(4).
       
       IDENTIFY-MULTIPLE-ACTIVITIES.
           PERFORM VARYING ACTIVITY-COUNT FROM 1 BY 1
               UNTIL ACTIVITY-COUNT > MAX-ACTIVITIES
               
               MOVE ACTIVITY-NAME(ACTIVITY-COUNT) TO ACTIVITY-NAME
               PERFORM IDENTIFY-SINGLE-ACTIVITY
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE ACTIVITY-ID TO ACTIVITY-ID(ACTIVITY-COUNT)
                   MOVE 'I' TO ACTIVITY-STATUS(ACTIVITY-COUNT)
                   DISPLAY 'Activity ' ACTIVITY-COUNT ' identified successfully'
               ELSE
                   MOVE 'F' TO ACTIVITY-STATUS(ACTIVITY-COUNT)
                   DISPLAY 'Activity ' ACTIVITY-COUNT ' identification failed'
               END-IF
           END-PERFORM.
       
       IDENTIFY-SINGLE-ACTIVITY.
           EXEC CICS ACTIVITY ID
               ACTIVITY(ACTIVITY-NAME)
               ID(ACTIVITY-ID)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Activity Identification

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVITYID03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-NAME PIC X(8) VALUE 'MYACT001'.
       01  ACTIVITY-ID PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  RETRY-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-RETRIES PIC S9(2) COMP VALUE 3.
       01  ACTIVITY-ID-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM IDENTIFY-ACTIVITY-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       IDENTIFY-ACTIVITY-WITH-RETRY.
           PERFORM IDENTIFY-ACTIVITY
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' activity identification operation'
               PERFORM IDENTIFY-ACTIVITY-WITH-RETRY
           END-IF.
       
       IDENTIFY-ACTIVITY.
           EXEC CICS ACTIVITY ID
               ACTIVITY(ACTIVITY-NAME)
               ID(ACTIVITY-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO ACTIVITY-ID-SUCCESSFUL
                   DISPLAY 'Activity identification operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to identify activity'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid activity identification request'
               WHEN DFHRESP(ACTIVITYERR)
                   DISPLAY 'Activity identification error'
               WHEN DFHRESP(ACTIVITYNOTFOUND)
                   DISPLAY 'Activity not found'
               WHEN DFHRESP(ACTIVITYINUSE)
                   DISPLAY 'Activity is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected activity identification error'
           END-EVALUATE.

Activity ID Management

Activity ID Operations

  • • Activity ID Generation - Generate activity IDs
  • • Activity ID Validation - Validate activity IDs
  • • Activity ID Tracking - Track activity IDs
  • • Activity ID Monitoring - Monitor activity IDs

Activity ID Lifecycle

  • • Activity ID Creation - Create activity IDs
  • • Activity ID Processing - Process activity IDs
  • • Activity ID Completion - Complete activity IDs
  • • Activity ID Cleanup - Clean up activity IDs

Activity ID Monitoring

  • • Activity ID Tracking - Track activity ID usage
  • • Activity ID Auditing - Audit activity ID operations
  • • Activity ID Reporting - Report activity ID status
  • • Activity ID Analysis - Analyze activity ID patterns

Activity ID Error Recovery

  • • Activity ID Error Detection - Detect activity ID errors
  • • Activity ID Error Recovery - Recover from activity ID errors
  • • Activity ID Retry Mechanisms - Implement activity ID retry logic
  • • Activity ID Fallback Procedures - Use activity ID fallback procedures

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Activity identification operation successful
  • DFHRESP(NOTAUTH) - Not authorized to identify activity
  • DFHRESP(INVREQ) - Invalid activity identification request
  • DFHRESP(ACTIVITYERR) - Activity identification error
  • DFHRESP(ACTIVITYNOTFOUND) - Activity not found
  • DFHRESP(ACTIVITYINUSE) - Activity is in use

Performance Considerations

Activity ID Efficiency

  • • Optimize activity ID operations - Use efficient activity ID handling
  • • Minimize activity ID overhead - Reduce activity ID processing overhead
  • • Use activity ID pooling - Implement activity ID pooling
  • • Monitor activity ID frequency - Track activity ID identification patterns

System Impact

  • • Monitor system impact - Track how activity ID identification affects the system
  • • Optimize activity ID handling - Ensure efficient activity ID processing
  • • Manage activity ID usage - Monitor activity ID consumption
  • • Track performance metrics - Monitor activity ID handling performance

Best Practices

Activity ID Best Practices

  • • Identify activities only when activity identification is needed
  • • Implement proper error handling for activity ID operations
  • • Validate activity state before identification
  • • Use appropriate activity ID management techniques
  • • Monitor activity ID identification activities and performance
  • • Maintain activity ID identification audit trails
  • • Handle activity ID identification errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS ACTIVITY ID like giving someone a name tag:

  • • Name Tag: "You see a name tag" - Activity ID available
  • • Put On Name Tag: "Put on the name tag" - Identify activity
  • • Name Tag On: "The name tag is now on" - Activity identified
  • • Use Name Tag: "Use the name tag" - Process activity ID
  • • Take Off Name Tag: "Take off the name tag" - Complete activity ID

Exercises

Exercise 1: Basic Activity Identification

Create a program that identifies basic activities.

Exercise 2: Advanced Activity ID Processing

Write a program that processes multiple activity identifications.

Exercise 3: Error Handling

Implement comprehensive error handling for activity identification failures.

Related Concepts

Activity ID Management

Managing activity IDs

Activity Identification

Identifying activities

Activity ID Processing

Processing activity IDs

Activity ID Monitoring

Monitoring activity IDs

Error Handling

Managing activity ID errors