Progress0 of 0 lessons

CICS CHECK ACQPROCESS - Acquisition Process Checking

CICS CHECK ACQPROCESS provides acquisition process checking and validation capabilities in CICS environments. It enables programs to check acquisition processes, validate process states, and monitor acquisition operations in CICS applications.

What is CICS CHECK ACQPROCESS?

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

Command Syntax

cobol
1
2
3
4
5
EXEC CICS CHECK ACQPROCESS
    PROCID(process-id)
    [STATE(state-value)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • PROCID - Process ID to check

Optional Parameters

  • STATE - Expected process state
  • RESP - Response code variable

Process States

Active States

Processes currently running

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

Completion States

Processes that have finished

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

Error States

Processes with errors

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

Resource States

Resource-related states

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

Programming Examples

Basic Process Check

cobol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-ID       PIC X(8) VALUE 'PROC001'.
       01  PROCESS-STATE    PIC X(8).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS CHECK ACQPROCESS
               PROCID(PROCESS-ID)
               STATE(PROCESS-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Process check completed successfully'
               DISPLAY 'Process state: ' PROCESS-STATE
           ELSE
               DISPLAY 'Failed to check process'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

State Validation

cobol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-ID       PIC X(8) VALUE 'PROC002'.
       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 ACQPROCESS
               PROCID(PROCESS-ID)
               STATE(ACTUAL-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               IF ACTUAL-STATE = EXPECTED-STATE
                   DISPLAY 'Process is in expected state'
               ELSE
                   DISPLAY 'Process state mismatch'
                   DISPLAY 'Expected: ' EXPECTED-STATE
                   DISPLAY 'Actual: ' ACTUAL-STATE
               END-IF
           ELSE
               DISPLAY 'Failed to check process state'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Error Handling with Process Check

cobol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
       IDENTIFICATION DIVISION.
       PROGRAM-ID. CHECK03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-ID       PIC X(8) VALUE 'PROC003'.
       01  PROCESS-STATE    PIC X(8).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS CHECK ACQPROCESS
               PROCID(PROCESS-ID)
               STATE(PROCESS-STATE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'Process check completed successfully'
                   DISPLAY 'Process state: ' PROCESS-STATE
               WHEN DFHRESP(NOTFND)
                   DISPLAY 'Process not found'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid check request'
               WHEN DFHRESP(PROCESSERR)
                   DISPLAY 'Process-specific error occurred'
               WHEN DFHRESP(STATEERR)
                   DISPLAY 'State-specific error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

Process Monitoring

State Monitoring

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

Process Validation

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

Resource Monitoring

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

Performance Monitoring

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

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Process check completed successfully
  • DFHRESP(NOTFND) - Process not found
  • DFHRESP(INVREQ) - Invalid check request
  • DFHRESP(PROCESSERR) - Process-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 process 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

Process Check Best Practices

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

Explain It Like I'm 5 Years Old

Think of CICS CHECK ACQPROCESS like checking on your friend:

  • • Friend: "Your friend" - The process to check
  • • Check: "Are they okay?" - Check the process
  • • State: "Are they playing or sleeping?" - Check the state
  • • Status: "Tell me how they are" - Get the status
  • • Result: "They are fine" - Process is healthy

Exercises

Exercise 1: Basic Process Check

Create a program that checks the state of a specific acquisition process.

Exercise 2: State Validation

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

Exercise 3: Error Handling

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

Related Concepts

Process Management

Managing system processes

Process Monitoring

Monitoring process states

Resource Management

Managing system resources

State Management

Managing process states

Error Handling

Managing check errors