What is CICS ACTIVATE command used for?

CICS ACTIVATE is used to activate resources in the system, providing resource activation capabilities and resource state management for CICS applications.

What types of resources can be activated?

Resource types include file resources (sequential, VSAM, QSAM, BDAM files), database resources (DB2, IMS, IDMS, ADABAS databases), network resources (TCP/IP, SNA, APPC, HTTP connections), and system resources (memory, processor, storage, I/O resources).

How do I handle errors with CICS ACTIVATE?

Always check the response code and implement appropriate error handling, including validation of resource state, retry mechanisms for failed operations, and fallback procedures for resource activation errors.

What is the purpose of resource activation?

Resource activation enables resource activation, resource state management, resource validation, resource monitoring, resource lifecycle management, resource monitoring, and resource error recovery in CICS applications.

When should I use CICS ACTIVATE?

Use this command when you need to activate resources, manage resource state, process resource operations, or implement resource activation in CICS applications.

CICS ACTIVATE - Activate Resource

CICS ACTIVATE provides resource activation capabilities for programs and transactions. It enables programs to activate resources, manage resource states, and handle resource activation in CICS environments.

What is CICS ACTIVATE?

CICS ACTIVATE is a command that allows programs to activate resources in the system. It provides resource activation capabilities, resource state management, and resource processing for CICS applications.

Command Syntax

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EXEC CICS ACTIVATE
    [RESOURCE(resource-name)]
    [TYPE(resource-type)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

RESOURCE(resource-name) - Name of resource to activate
TYPE(resource-type) - Type of resource to activate
RESP(response-code) - Response code variable

Resource Types

File Resources

File resource types

• SEQUENTIAL FILES - Sequential file resources
• VSAM FILES - VSAM file resources
• QSAM FILES - QSAM file resources
• BDAM FILES - BDAM file resources

Database Resources

Database resource types

• DB2 DATABASES - DB2 database resources
• IMS DATABASES - IMS database resources
• IDMS DATABASES - IDMS database resources
• ADABAS DATABASES - ADABAS database resources

Network Resources

Network resource types

• TCP/IP CONNECTIONS - TCP/IP connection resources
• SNA CONNECTIONS - SNA connection resources
• APPC CONNECTIONS - APPC connection resources
• HTTP CONNECTIONS - HTTP connection resources

System Resources

System resource types

• MEMORY RESOURCES - Memory resources
• PROCESSOR RESOURCES - Processor resources
• STORAGE RESOURCES - Storage resources
• I/O RESOURCES - I/O resources

Programming Examples

Basic Resource Activation

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVATE01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8) VALUE 'MYFILE01'.
       01  RESOURCE-TYPE PIC X(8) VALUE 'FILE'.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Activating resource'
           DISPLAY 'Resource: ' RESOURCE-NAME
           DISPLAY 'Type: ' RESOURCE-TYPE
           
           EXEC CICS ACTIVATE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Resource activated successfully'
           ELSE
               DISPLAY 'Resource activation failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Resource Management

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVATE02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8).
       01  RESOURCE-TYPE PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  RESOURCE-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-RESOURCES PIC S9(2) COMP VALUE 4.
       01  RESOURCE-STATUS PIC X(1).
       01  RESOURCE-LIST.
           05  RESOURCE-ITEM OCCURS 4 TIMES.
               10  RESOURCE-ID PIC X(8).
               10  RESOURCE-TYPE PIC X(8).
               10  RESOURCE-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-RESOURCES
           PERFORM ACTIVATE-MULTIPLE-RESOURCES
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-RESOURCES.
           MOVE 'FILE001' TO RESOURCE-ID(1)
           MOVE 'FILE' TO RESOURCE-TYPE(1)
           MOVE 'DB2001' TO RESOURCE-ID(2)
           MOVE 'DB2' TO RESOURCE-TYPE(2)
           MOVE 'TCP001' TO RESOURCE-ID(3)
           MOVE 'TCPIP' TO RESOURCE-TYPE(3)
           MOVE 'MEM001' TO RESOURCE-ID(4)
           MOVE 'MEMORY' TO RESOURCE-TYPE(4).
       
       ACTIVATE-MULTIPLE-RESOURCES.
           PERFORM VARYING RESOURCE-COUNT FROM 1 BY 1
               UNTIL RESOURCE-COUNT > MAX-RESOURCES
               
               MOVE RESOURCE-ID(RESOURCE-COUNT) TO RESOURCE-NAME
               MOVE RESOURCE-TYPE(RESOURCE-COUNT) TO RESOURCE-TYPE
               PERFORM ACTIVATE-SINGLE-RESOURCE
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'A' TO RESOURCE-STATUS(RESOURCE-COUNT)
                   DISPLAY 'Resource ' RESOURCE-COUNT ' activated successfully'
               ELSE
                   MOVE 'F' TO RESOURCE-STATUS(RESOURCE-COUNT)
                   DISPLAY 'Resource ' RESOURCE-COUNT ' activation failed'
               END-IF
           END-PERFORM.
       
       ACTIVATE-SINGLE-RESOURCE.
           EXEC CICS ACTIVATE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Resource Activation

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVATE03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8) VALUE 'MYFILE01'.
       01  RESOURCE-TYPE PIC X(8) VALUE 'FILE'.
       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  RESOURCE-ACTIVATE-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM ACTIVATE-RESOURCE-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       ACTIVATE-RESOURCE-WITH-RETRY.
           PERFORM ACTIVATE-RESOURCE
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' resource activation operation'
               PERFORM ACTIVATE-RESOURCE-WITH-RETRY
           END-IF.
       
       ACTIVATE-RESOURCE.
           EXEC CICS ACTIVATE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO RESOURCE-ACTIVATE-SUCCESSFUL
                   DISPLAY 'Resource activation operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to activate resource'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid resource activation request'
               WHEN DFHRESP(RESOURCEERR)
                   DISPLAY 'Resource activation error'
               WHEN DFHRESP(RESOURCENOTFOUND)
                   DISPLAY 'Resource not found'
               WHEN DFHRESP(RESOURCEINUSE)
                   DISPLAY 'Resource is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected resource activation error'
           END-EVALUATE.

Resource Management

Resource Activation

• Resource Activation - Activate resources
• Resource State - Manage resource state
• Resource Validation - Validate resources
• Resource Monitoring - Monitor resource status

Resource Lifecycle

• Resource Creation - Create resources
• Resource Processing - Process resources
• Resource Completion - Complete resources
• Resource Cleanup - Clean up resources

Resource Monitoring

• Resource Tracking - Track resource usage
• Resource Auditing - Audit resource operations
• Resource Reporting - Report resource status
• Resource Analysis - Analyze resource patterns

Resource Error Recovery

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

Error Handling

Common Response Codes

DFHRESP(NORMAL) - Resource activation operation successful
DFHRESP(NOTAUTH) - Not authorized to activate resource
DFHRESP(INVREQ) - Invalid resource activation request
DFHRESP(RESOURCEERR) - Resource activation error
DFHRESP(RESOURCENOTFOUND) - Resource not found
DFHRESP(RESOURCEINUSE) - Resource is in use

Performance Considerations

Resource Efficiency

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

System Impact

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

Best Practices

Resource Activation Best Practices

• Activate resources only when resources are needed
• Implement proper error handling for resource operations
• Validate resource state before activation
• Use appropriate resource management techniques
• Monitor resource activation activities and performance
• Maintain resource activation audit trails
• Handle resource activation errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS ACTIVATE like turning on a light switch:

• Light Switch: "You see a light switch" - Resource available
• Turn On Light: "Turn on the light switch" - Activate resource
• Light On: "The light is now on" - Resource activated
• Use Light: "Use the light" - Resource processing
• Turn Off Light: "Turn off the light switch" - Resource deactivated

Exercises

Exercise 1: Basic Resource Activation

Create a program that activates basic resources.

Exercise 2: Advanced Resource Management

Write a program that manages multiple resource activations.

Exercise 3: Error Handling

Implement comprehensive error handling for resource activation failures.

CICS ACTIVATE - Activate Resource

What is CICS ACTIVATE?

Command Syntax

Parameters

Optional Parameters

Resource Types

File Resources

Database Resources

Network Resources

System Resources

Programming Examples

Basic Resource Activation

Advanced Resource Management

Error Handling with Resource Activation

Resource Management

Resource Activation

Resource Lifecycle

Resource Monitoring

Resource Error Recovery

Error Handling

Common Response Codes

Performance Considerations

Resource Efficiency

System Impact

Best Practices

Resource Activation Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic Resource Activation

Exercise 2: Advanced Resource Management

Exercise 3: Error Handling

Related Concepts

Resource Management

Resource Activation

Resource Processing

Resource Monitoring

Error Handling

Related Pages