Progress0 of 0 lessons

CICS SUSPEND (BTS) - Business Transaction Services Suspension

CICS SUSPEND (BTS) provides Business Transaction Services suspension capabilities in CICS environments. It enables programs to suspend BTS operations, manage BTS suspension, and handle BTS suspend operations in CICS applications.

What is CICS SUSPEND (BTS)?

CICS SUSPEND (BTS) is a command that allows programs to suspend Business Transaction Services operations, manage BTS suspension, and handle BTS suspend operations in CICS environments. It provides BTS suspension capabilities, suspension management, and operation handling for CICS applications.

Command Syntax

cobol
1
2
3
4
5
6
EXEC CICS SUSPEND BTS
    [CONTAINER(container-name)]
    [CHANNEL(channel-name)]
    [SUSPENDID(suspend-id)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • CONTAINER - Container name for BTS suspension

Optional Parameters

  • CHANNEL - Channel name for BTS suspension
  • SUSPENDID - Suspend identifier for tracking
  • RESP - Response code variable

BTS Suspension Types

Container Suspension

Suspend BTS container operations

  • • CONTAINER SUSPEND - Suspend specific container operations in BTS
  • • CONTAINER PAUSE - Pause container processing temporarily
  • • CONTAINER HOLD - Hold container operations for later processing
  • • CONTAINER FREEZE - Freeze container state during suspension

Channel Suspension

Suspend BTS channel operations

  • • CHANNEL SUSPEND - Suspend specific channel operations in BTS
  • • CHANNEL PAUSE - Pause channel processing temporarily
  • • CHANNEL HOLD - Hold channel operations for later processing
  • • CHANNEL FREEZE - Freeze channel state during suspension

Transaction Suspension

Suspend BTS transaction operations

  • • TRANSACTION SUSPEND - Suspend specific transaction operations in BTS
  • • TRANSACTION PAUSE - Pause transaction processing temporarily
  • • TRANSACTION HOLD - Hold transaction operations for later processing
  • • TRANSACTION FREEZE - Freeze transaction state during suspension

Service Suspension

Suspend BTS service operations

  • • SERVICE SUSPEND - Suspend specific service operations in BTS
  • • SERVICE PAUSE - Pause service processing temporarily
  • • SERVICE HOLD - Hold service operations for later processing
  • • SERVICE FREEZE - Freeze service state during suspension

Programming Examples

Basic BTS Suspension

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
       IDENTIFICATION DIVISION.
       PROGRAM-ID. SUSPEND01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CONTAINER-NAME   PIC X(16) VALUE 'BTS-CONTAINER'.
       01  CHANNEL-NAME     PIC X(16) VALUE 'BTS-CHANNEL'.
       01  SUSPEND-ID       PIC X(8) VALUE 'SUSP001'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS SUSPEND BTS
               CONTAINER(CONTAINER-NAME)
               CHANNEL(CHANNEL-NAME)
               SUSPENDID(SUSPEND-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'BTS suspended successfully'
               DISPLAY 'Container: ' CONTAINER-NAME
               DISPLAY 'Channel: ' CHANNEL-NAME
               DISPLAY 'Suspend ID: ' SUSPEND-ID
           ELSE
               DISPLAY 'Failed to suspend BTS'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Container-Based Suspension

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
       IDENTIFICATION DIVISION.
       PROGRAM-ID. SUSPEND02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CONTAINER-NAME   PIC X(16) VALUE 'BTS-CONTAINER'.
       01  SUSPEND-ID       PIC X(8) VALUE 'SUSP002'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       01  SUSPEND-COUNT   PIC 9(3) VALUE 0.
       
       PROCEDURE DIVISION.
           EXEC CICS SUSPEND BTS
               CONTAINER(CONTAINER-NAME)
               SUSPENDID(SUSPEND-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Container-based BTS suspension successful'
               DISPLAY 'Container: ' CONTAINER-NAME
               DISPLAY 'Suspend ID: ' SUSPEND-ID
               
               ADD 1 TO SUSPEND-COUNT
               DISPLAY 'Suspension count: ' SUSPEND-COUNT
           ELSE
               DISPLAY 'Failed to suspend container-based BTS'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Error Handling with BTS Suspension

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
33
34
35
36
       IDENTIFICATION DIVISION.
       PROGRAM-ID. SUSPEND03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CONTAINER-NAME   PIC X(16) VALUE 'BTS-CONTAINER'.
       01  CHANNEL-NAME     PIC X(16) VALUE 'BTS-CHANNEL'.
       01  SUSPEND-ID       PIC X(8) VALUE 'SUSP003'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS SUSPEND BTS
               CONTAINER(CONTAINER-NAME)
               CHANNEL(CHANNEL-NAME)
               SUSPENDID(SUSPEND-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'BTS suspended successfully'
                   DISPLAY 'Container: ' CONTAINER-NAME
                   DISPLAY 'Channel: ' CHANNEL-NAME
                   DISPLAY 'Suspend ID: ' SUSPEND-ID
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid suspension request'
               WHEN DFHRESP(BTSERR)
                   DISPLAY 'BTS-specific error occurred'
               WHEN DFHRESP(CONTAINERERR)
                   DISPLAY 'Container-specific error occurred'
               WHEN DFHRESP(AUTHORITYERR)
                   DISPLAY 'Authorization error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

BTS Suspension Management

Suspension State Management

  • • State Tracking - Track suspension state and maintain suspension status
  • • State Validation - Validate suspension state and ensure consistency
  • • State Recovery - Recover from suspension state and restore operations
  • • State Monitoring - Monitor suspension state and track changes

Resource Management

  • • Resource Allocation - Allocate resources for suspension operations
  • • Resource Cleanup - Clean up resources after suspension operations
  • • Resource Monitoring - Monitor resource usage during suspension
  • • Resource Optimization - Optimize resource usage for suspension operations

Operation Management

  • • Operation Tracking - Track suspension operations and their status
  • • Operation Validation - Validate suspension operations and ensure correctness
  • • Operation Recovery - Recover from failed suspension operations
  • • Operation Monitoring - Monitor suspension operations and performance

Error Management

  • • Error Detection - Detect errors during suspension operations
  • • Error Recovery - Recover from suspension operation errors
  • • Error Reporting - Report suspension operation errors
  • • Error Prevention - Prevent future suspension operation errors

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - BTS suspended successfully
  • DFHRESP(INVREQ) - Invalid suspension request
  • DFHRESP(BTSERR) - BTS-specific error
  • DFHRESP(CONTAINERERR) - Container-specific error
  • DFHRESP(AUTHORITYERR) - Authorization error
  • DFHRESP(RESOURCEERR) - Resource error

Performance Considerations

Suspension Efficiency

  • • Optimize suspension operations - Use appropriate suspension methods for different BTS types
  • • Minimize suspension overhead - Reduce the computational cost of suspension operations
  • • Use efficient suspension patterns - Implement suspension strategies that minimize resource usage
  • • Monitor suspension performance - Track the performance impact of suspension operations

Resource Impact

  • • Monitor resource usage - Track how suspension operations consume system resources
  • • Optimize resource allocation - Ensure efficient allocation of resources for suspension
  • • Manage resource cleanup - Properly clean up resources after suspension operations
  • • Track resource utilization - Monitor the overall resource consumption patterns

Best Practices

BTS Suspension Best Practices

  • • Always check response codes
  • • Use appropriate suspension parameters
  • • Implement proper error handling
  • • Ensure proper suspension state management
  • • Validate suspension operations
  • • Optimize suspension operations
  • • Clean up resources properly

Explain It Like I'm 5 Years Old

Think of CICS SUSPEND (BTS) like pausing a video game:

  • • Game Name: "Which game to pause" - The container name
  • • Pause Button: "Press pause button" - Suspend BTS
  • • Save Progress: "Save where you are" - Suspend ID
  • • Game Paused: "Game is now paused" - BTS suspended
  • • Resume Later: "Can resume later" - Resume BTS operations

Exercises

Exercise 1: Basic BTS Suspension

Create a program that suspends BTS operations using SUSPEND BTS.

Exercise 2: Container-Based Suspension

Write a program that suspends BTS operations based on specific containers.

Exercise 3: Error Handling

Implement comprehensive error handling for BTS suspension failures.

Related Concepts

Business Transaction Services

Managing BTS operations

Container Management

Managing BTS containers

Channel Management

Managing BTS channels

Transaction Processing

Processing BTS transactions

Error Handling

Managing BTS errors