What is CICS FORCE TIMER command used for?

CICS FORCE TIMER is used to force timer operations in the system, providing timer force operation capabilities and timer state management for CICS applications.

What types of timer force operations are supported?

Timer force operations include timer operations (force start, stop, reset, expire), timer states (active, inactive, expired, error), timer types (interval, absolute, relative, custom), and timer priority (high, normal, low, critical).

How do I handle errors with CICS FORCE TIMER?

Always check the response code and implement appropriate error handling, including validation of timer states, retry mechanisms for failed operations, and fallback procedures for timer force errors.

What is the purpose of timer force operations?

Timer force operations enable timer control, timer management, timer monitoring, timer validation, timer state management, and error recovery in CICS applications.

When should I use CICS FORCE TIMER?

Use this command when you need to force timer operations, manage timer states, control timer behavior, or implement timer-based operations in CICS applications.

CICS FORCE TIMER - Timer Force Operations

CICS FORCE TIMER provides timer force operation capabilities for programs and transactions. It enables programs to force timer operations, manage timer states, and handle timer operations in CICS environments.

What is CICS FORCE TIMER?

CICS FORCE TIMER is a command that allows programs to force timer operations in the system. It provides timer force operation capabilities, timer state management, and timer operation handling for CICS applications.

Command Syntax

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EXEC CICS FORCE TIMER
    TIMERID(timer-id)
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

TIMERID(timer-id) - Timer identifier to force

Optional Parameters

RESP(response-code) - Response code variable

Timer Force Types

Timer Operations

Timer operation types

• FORCE START - Force timer to start
• FORCE STOP - Force timer to stop
• FORCE RESET - Force timer to reset
• FORCE EXPIRE - Force timer to expire

Timer States

Timer state management

• ACTIVE STATE - Timer is active
• INACTIVE STATE - Timer is inactive
• EXPIRED STATE - Timer has expired
• ERROR STATE - Timer has error

Timer Types

Timer type management

• INTERVAL TIMER - Interval-based timer
• ABSOLUTE TIMER - Absolute time timer
• RELATIVE TIMER - Relative time timer
• CUSTOM TIMER - Custom timer

Timer Priority

Timer priority management

• HIGH PRIORITY - High priority timer
• NORMAL PRIORITY - Normal priority timer
• LOW PRIORITY - Low priority timer
• CRITICAL PRIORITY - Critical priority timer

Programming Examples

Basic Timer Force Operation

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. FORCETIMER01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  TIMER-ID PIC X(8) VALUE 'TIMER001'.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Forcing timer operation'
           DISPLAY 'Timer ID: ' TIMER-ID
           
           EXEC CICS FORCE TIMER
               TIMERID(TIMER-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Timer force operation successful'
           ELSE
               DISPLAY 'Timer force operation failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Timer Force Management

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. FORCETIMER02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  TIMER-ID PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  FORCE-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-FORCES PIC S9(2) COMP VALUE 3.
       01  TIMER-LIST.
           05  TIMER-ITEM OCCURS 3 TIMES.
               10  TIMER-NAME PIC X(8).
               10  TIMER-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-TIMERS
           PERFORM FORCE-MULTIPLE-TIMERS
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-TIMERS.
           MOVE 'TIMER001' TO TIMER-NAME(1)
           MOVE 'TIMER002' TO TIMER-NAME(2)
           MOVE 'TIMER003' TO TIMER-NAME(3).
       
       FORCE-MULTIPLE-TIMERS.
           PERFORM VARYING FORCE-COUNT FROM 1 BY 1
               UNTIL FORCE-COUNT > MAX-FORCES
               
               MOVE TIMER-NAME(FORCE-COUNT) TO TIMER-ID
               PERFORM FORCE-SINGLE-TIMER
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'F' TO TIMER-STATUS(FORCE-COUNT)
                   DISPLAY 'Timer ' FORCE-COUNT ' forced successfully'
               ELSE
                   MOVE 'E' TO TIMER-STATUS(FORCE-COUNT)
                   DISPLAY 'Timer ' FORCE-COUNT ' force failed'
               END-IF
           END-PERFORM.
       
       FORCE-SINGLE-TIMER.
           EXEC CICS FORCE TIMER
               TIMERID(TIMER-ID)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Timer Force Operations

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. FORCETIMER03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  TIMER-ID PIC X(8) VALUE 'TIMER001'.
       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  FORCE-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM FORCE-TIMER-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       FORCE-TIMER-WITH-RETRY.
           PERFORM FORCE-TIMER
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' timer force operation'
               PERFORM FORCE-TIMER-WITH-RETRY
           END-IF.
       
       FORCE-TIMER.
           EXEC CICS FORCE TIMER
               TIMERID(TIMER-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO FORCE-SUCCESSFUL
                   DISPLAY 'Timer force operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to force timer'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid timer force request'
               WHEN DFHRESP(TIMERERR)
                   DISPLAY 'Timer force operation error'
               WHEN DFHRESP(TIMERNOTFOUND)
                   DISPLAY 'Timer not found'
               WHEN DFHRESP(TIMERINACTIVE)
                   DISPLAY 'Timer is inactive'
               WHEN OTHER
                   DISPLAY 'Unexpected timer force error'
           END-EVALUATE.

Timer Force Management

Timer Control

• Timer Force - Force timer operations
• Timer Management - Manage timer states
• Timer Monitoring - Monitor timer status
• Timer Validation - Validate timer operations

Timer Operations

• Force Start - Force timer to start
• Force Stop - Force timer to stop
• Force Reset - Force timer to reset
• Force Expire - Force timer to expire

Timer State Management

• State Control - Control timer states
• State Monitoring - Monitor timer states
• State Validation - Validate timer states
• State Recovery - Recover timer states

Error Recovery

• Error Detection - Detect timer force errors
• Error Recovery - Recover from timer force errors
• Retry Mechanisms - Implement retry logic
• Fallback Procedures - Use fallback procedures

Error Handling

Common Response Codes

DFHRESP(NORMAL) - Timer force operation successful
DFHRESP(NOTAUTH) - Not authorized to force timer
DFHRESP(INVREQ) - Invalid timer force request
DFHRESP(TIMERERR) - Timer force operation error
DFHRESP(TIMERNOTFOUND) - Timer not found
DFHRESP(TIMERINACTIVE) - Timer is inactive

Performance Considerations

Timer Efficiency

• Optimize timer operations - Use efficient timer handling
• Minimize timer overhead - Reduce timer processing overhead
• Use timer pooling - Implement timer pooling
• Monitor timer frequency - Track timer force patterns

System Impact

• Monitor system impact - Track how timer force affects the system
• Optimize timer handling - Ensure efficient timer processing
• Manage timer usage - Monitor timer consumption
• Track performance metrics - Monitor timer handling performance

Best Practices

Timer Force Operations Best Practices

• Force timer operations only when necessary
• Implement proper error handling for timer operations
• Validate timer states before forcing operations
• Use appropriate timer management techniques
• Monitor timer force activities and performance
• Maintain timer force audit trails
• Handle timer force errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS FORCE TIMER like making a clock work:

• Clock Stuck: "The clock is stuck" - Timer not working
• Make It Work: "Make the clock work" - Force timer
• Fix Clock: "Fix the clock" - Force timer operation
• Clock Working: "Clock is working now" - Timer working
• Keep Clock: "Keep the clock safe" - Manage timer

Exercises

Exercise 1: Basic Timer Force Operation

Create a program that forces a basic timer operation.

Exercise 2: Advanced Timer Force Management

Write a program that manages multiple timer force operations.

Exercise 3: Error Handling

Implement comprehensive error handling for timer force operation failures.

CICS FORCE TIMER - Timer Force Operations

What is CICS FORCE TIMER?

Command Syntax

Parameters

Required Parameters

Optional Parameters

Timer Force Types

Timer Operations

Timer States

Timer Types

Timer Priority

Programming Examples

Basic Timer Force Operation

Advanced Timer Force Management

Error Handling with Timer Force Operations

Timer Force Management

Timer Control

Timer Operations

Timer State Management

Error Recovery

Error Handling

Common Response Codes

Performance Considerations

Timer Efficiency

System Impact

Best Practices

Timer Force Operations Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic Timer Force Operation

Exercise 2: Advanced Timer Force Management

Exercise 3: Error Handling

Related Concepts

Timer Management

Timer Operations

Timer Monitoring

Timer Control

Error Handling

Related Pages