What activity states can be checked?

Activity states include active states (RUNNING, WAITING, SUSPENDED, BLOCKED), completion states (COMPLETED, TERMINATED, ABENDED, CANCELLED), error states (ERROR, FAILED, TIMEOUT, DEADLOCK), and resource states (ALLOCATED, DEALLOCATED, LOCKED, UNLOCKED).

How do I handle errors with CICS CHECK ACTIVITY?

Always check the response code and implement appropriate error handling, including validation of activity existence, proper handling of state errors, and resource cleanup on check failures.

What is the purpose of activity checking?

Activity checking ensures activities are running correctly, validates activity states, monitors activity health, tracks resource usage, and provides activity status information for system management.

When should I use CICS CHECK ACTIVITY?

Use this command when you need to validate activity states, monitor activity health, check activity status, verify resource allocation, or perform activity diagnostics in CICS applications.

CICS CHECK ACTIVITY - Activity Checking and Validation

Q: What is CICS CHECK ACTIVITY command used for?

CICS CHECK ACTIVITY is used to check activities, validate activity states, and monitor activity operations in CICS applications for activity validation and monitoring.

CICS CHECK ACTIVITY provides activity checking and validation capabilities in CICS environments. It enables programs to check activities, validate activity states, and monitor activity operations in CICS applications.

What is CICS CHECK ACTIVITY?

CICS CHECK ACTIVITY is a command that allows programs to check activities, validate activity states, and monitor activity operations in CICS environments. It provides activity validation capabilities, state checking, and activity monitoring for CICS applications.

Command Syntax

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EXEC CICS CHECK ACTIVITY
    ACTIVITYID(activity-id)
    [STATE(state-value)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

ACTIVITYID - Activity ID to check

Optional Parameters

STATE - Expected activity state
RESP - Response code variable

Activity States

Active States

Activities currently running

• RUNNING - Activity is currently executing and performing its operations
• WAITING - Activity is waiting for resources or events to become available
• SUSPENDED - Activity execution has been temporarily paused by the system
• BLOCKED - Activity cannot proceed due to resource constraints or dependencies

Completion States

Activities that have finished

• COMPLETED - Activity finished successfully and completed all its tasks
• TERMINATED - Activity was stopped by external intervention or system shutdown
• ABENDED - Activity terminated abnormally due to an error or exception
• CANCELLED - Activity was cancelled before completion by user or system request

Error States

Activities with errors

• ERROR - Activity encountered an error condition that prevented normal execution
• FAILED - Activity failed to complete its intended operation due to system or application issues
• TIMEOUT - Activity exceeded its maximum allowed execution time and was terminated
• DEADLOCK - Activity is stuck waiting for resources that are held by other activities

Resource States

Resource-related states

• ALLOCATED - Resources have been assigned to the activity and are available for use
• DEALLOCATED - Resources have been released by the activity and returned to the system
• LOCKED - Resources are locked by the activity to prevent access by other activities
• UNLOCKED - Resources are available for use by other activities

Programming Examples

Basic Activity Check

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-ID      PIC X(8) VALUE 'ACT001'.
       01  ACTIVITY-STATE   PIC X(8).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS CHECK ACTIVITY
               ACTIVITYID(ACTIVITY-ID)
               STATE(ACTIVITY-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Activity check completed successfully'
               DISPLAY 'Activity state: ' ACTIVITY-STATE
           ELSE
               DISPLAY 'Failed to check activity'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

State Validation

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-ID      PIC X(8) VALUE 'ACT002'.
       01  EXPECTED-STATE   PIC X(8) VALUE 'RUNNING'.
       01  ACTUAL-STATE     PIC X(8).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS CHECK ACTIVITY
               ACTIVITYID(ACTIVITY-ID)
               STATE(ACTUAL-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               IF ACTUAL-STATE = EXPECTED-STATE
                   DISPLAY 'Activity is in expected state'
               ELSE
                   DISPLAY 'Activity state mismatch'
                   DISPLAY 'Expected: ' EXPECTED-STATE
                   DISPLAY 'Actual: ' ACTUAL-STATE
               END-IF
           ELSE
               DISPLAY 'Failed to check activity state'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Error Handling with Activity Check

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ACTIVITY-ID      PIC X(8) VALUE 'ACT003'.
       01  ACTIVITY-STATE   PIC X(8).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS CHECK ACTIVITY
               ACTIVITYID(ACTIVITY-ID)
               STATE(ACTIVITY-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'Activity check completed successfully'
                   DISPLAY 'Activity state: ' ACTIVITY-STATE
               WHEN DFHRESP(NOTFND)
                   DISPLAY 'Activity not found'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid check request'
               WHEN DFHRESP(ACTIVITYERR)
                   DISPLAY 'Activity-specific error occurred'
               WHEN DFHRESP(STATEERR)
                   DISPLAY 'State-specific error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

Activity Monitoring

State Monitoring

• Current state checking - Verify the current operational state of the activity
• State transition tracking - Monitor changes in activity state over time
• State validation - Ensure the activity is in the expected state for operations
• State reporting - Generate reports on activity state information

Activity Validation

• Activity existence check - Verify that the specified activity exists in the system
• Activity status validation - Confirm the activity is in a valid operational state
• Activity health check - Assess the overall health and performance of the activity
• Activity integrity check - Ensure the activity data and configuration are intact

Resource Monitoring

• Resource allocation check - Verify that required resources are properly allocated to the activity
• Resource usage monitoring - Track how resources are being utilized by the activity
• Resource availability check - Ensure resources are available when needed by the activity
• Resource status validation - Confirm resources are in the correct state for activity operations

Performance Monitoring

• Activity performance check - Evaluate the efficiency and speed of activity execution
• Execution time monitoring - Track how long activities take to complete their operations
• Resource efficiency check - Assess how effectively the activity uses allocated resources
• Performance validation - Ensure the activity meets performance requirements and benchmarks

Error Handling

Common Response Codes

DFHRESP(NORMAL) - Activity check completed successfully
DFHRESP(NOTFND) - Activity not found
DFHRESP(INVREQ) - Invalid check request
DFHRESP(ACTIVITYERR) - Activity-specific error
DFHRESP(STATEERR) - State-specific error
DFHRESP(CHECKERR) - Check-specific error

Performance Considerations

Check Frequency

• Optimize check frequency - Balance between monitoring needs and system performance impact
• Minimize check overhead - Reduce the computational cost of activity checking operations
• Use efficient check patterns - Implement checking strategies that minimize resource usage
• Monitor check performance - Track the performance impact of checking operations on the system

Resource Impact

• Monitor resource usage - Track how checking operations consume system resources
• Optimize resource allocation - Ensure efficient allocation of resources for checking operations
• Manage resource cleanup - Properly release resources after checking operations complete
• Track resource utilization - Monitor the overall resource consumption patterns of checking activities

Best Practices

Activity Check Best Practices

• Always check response codes
• Use appropriate check parameters
• Implement proper error handling
• Validate activity states
• Monitor activity health
• Optimize check operations
• Clean up resources properly

Explain It Like I'm 5 Years Old

Think of CICS CHECK ACTIVITY like checking on your game:

• Game: "Your game" - The activity to check
• Check: "Is it working?" - Check the activity
• State: "Is it running or stopped?" - Check the state
• Status: "Tell me how it is" - Get the status
• Result: "It's working fine" - Activity is healthy

Exercises

Exercise 1: Basic Activity Check

Create a program that checks the state of a specific activity.

Exercise 2: State Validation

Write a program that validates whether an activity is in the expected state.

Exercise 3: Error Handling

Implement comprehensive error handling for activity check failures and state errors.

CICS CHECK ACTIVITY - Activity Checking and Validation

What is CICS CHECK ACTIVITY?

Command Syntax

Parameters

Required Parameters

Optional Parameters

Activity States

Active States

Completion States

Error States

Resource States

Programming Examples

Basic Activity Check

State Validation

Error Handling with Activity Check

Activity Monitoring

State Monitoring

Activity Validation

Resource Monitoring

Performance Monitoring

Error Handling

Common Response Codes

Performance Considerations

Check Frequency

Resource Impact

Best Practices

Activity Check Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic Activity Check

Exercise 2: State Validation

Exercise 3: Error Handling

Related Concepts

Activity Management

Activity Monitoring

Resource Management

State Management

Error Handling

Related Pages