Progress0 of 0 lessons

CICS ACTIVATE (RESOURCE) - Activate Specific Resource

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

What is CICS ACTIVATE (RESOURCE)?

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

Command Syntax

cobol
1
2
3
4
5
6
EXEC CICS ACTIVATE RESOURCE
    [RESOURCE(resource-name)]
    [TYPE(resource-type)]
    [PARAMETERS(parameter-list)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

  • RESOURCE(resource-name) - Name of specific resource to activate
  • TYPE(resource-type) - Type of specific resource to activate
  • PARAMETERS(parameter-list) - Parameters for resource activation
  • RESP(response-code) - Response code variable

Specific Resource Types

File Resources

Specific file resource types

  • • SEQUENTIAL FILES - Specific sequential file resources
  • • VSAM FILES - Specific VSAM file resources
  • • QSAM FILES - Specific QSAM file resources
  • • BDAM FILES - Specific BDAM file resources

Database Resources

Specific database resource types

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

Network Resources

Specific network resource types

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

System Resources

Specific system resource types

  • • MEMORY RESOURCES - Specific memory resources
  • • PROCESSOR RESOURCES - Specific processor resources
  • • STORAGE RESOURCES - Specific storage resources
  • • I/O RESOURCES - Specific I/O resources

Programming Examples

Basic Specific Resource Activation

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. ACTIVATERESOURCE01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8) VALUE 'MYFILE01'.
       01  RESOURCE-TYPE PIC X(8) VALUE 'FILE'.
       01  PARAMETER-LIST PIC X(20) VALUE 'PARM1=VAL1,PARM2=VAL2'.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Activating specific resource'
           DISPLAY 'Resource: ' RESOURCE-NAME
           DISPLAY 'Type: ' RESOURCE-TYPE
           DISPLAY 'Parameters: ' PARAMETER-LIST
           
           EXEC CICS ACTIVATE RESOURCE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               PARAMETERS(PARAMETER-LIST)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Specific resource activated successfully'
           ELSE
               DISPLAY 'Specific resource activation failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Specific Resource Management

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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVATERESOURCE02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8).
       01  RESOURCE-TYPE PIC X(8).
       01  PARAMETER-LIST PIC X(20).
       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-PARMS PIC X(20).
               10  RESOURCE-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-SPECIFIC-RESOURCES
           PERFORM ACTIVATE-MULTIPLE-SPECIFIC-RESOURCES
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-SPECIFIC-RESOURCES.
           MOVE 'FILE001' TO RESOURCE-ID(1)
           MOVE 'FILE' TO RESOURCE-TYPE(1)
           MOVE 'PARM1=VAL1' TO RESOURCE-PARMS(1)
           MOVE 'DB2001' TO RESOURCE-ID(2)
           MOVE 'DB2' TO RESOURCE-TYPE(2)
           MOVE 'PARM2=VAL2' TO RESOURCE-PARMS(2)
           MOVE 'TCP001' TO RESOURCE-ID(3)
           MOVE 'TCPIP' TO RESOURCE-TYPE(3)
           MOVE 'PARM3=VAL3' TO RESOURCE-PARMS(3)
           MOVE 'MEM001' TO RESOURCE-ID(4)
           MOVE 'MEMORY' TO RESOURCE-TYPE(4)
           MOVE 'PARM4=VAL4' TO RESOURCE-PARMS(4).
       
       ACTIVATE-MULTIPLE-SPECIFIC-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
               MOVE RESOURCE-PARMS(RESOURCE-COUNT) TO PARAMETER-LIST
               PERFORM ACTIVATE-SINGLE-SPECIFIC-RESOURCE
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'A' TO RESOURCE-STATUS(RESOURCE-COUNT)
                   DISPLAY 'Specific resource ' RESOURCE-COUNT ' activated successfully'
               ELSE
                   MOVE 'F' TO RESOURCE-STATUS(RESOURCE-COUNT)
                   DISPLAY 'Specific resource ' RESOURCE-COUNT ' activation failed'
               END-IF
           END-PERFORM.
       
       ACTIVATE-SINGLE-SPECIFIC-RESOURCE.
           EXEC CICS ACTIVATE RESOURCE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               PARAMETERS(PARAMETER-LIST)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Specific Resource Activation

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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
       IDENTIFICATION DIVISION.
       PROGRAM-ID. ACTIVATERESOURCE03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESOURCE-NAME PIC X(8) VALUE 'MYFILE01'.
       01  RESOURCE-TYPE PIC X(8) VALUE 'FILE'.
       01  PARAMETER-LIST PIC X(20) VALUE 'PARM1=VAL1'.
       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-SPECIFIC-RESOURCE-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       ACTIVATE-SPECIFIC-RESOURCE-WITH-RETRY.
           PERFORM ACTIVATE-SPECIFIC-RESOURCE
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' specific resource activation operation'
               PERFORM ACTIVATE-SPECIFIC-RESOURCE-WITH-RETRY
           END-IF.
       
       ACTIVATE-SPECIFIC-RESOURCE.
           EXEC CICS ACTIVATE RESOURCE
               RESOURCE(RESOURCE-NAME)
               TYPE(RESOURCE-TYPE)
               PARAMETERS(PARAMETER-LIST)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO RESOURCE-ACTIVATE-SUCCESSFUL
                   DISPLAY 'Specific resource activation operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to activate specific resource'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid specific resource activation request'
               WHEN DFHRESP(RESOURCEERR)
                   DISPLAY 'Specific resource activation error'
               WHEN DFHRESP(RESOURCENOTFOUND)
                   DISPLAY 'Specific resource not found'
               WHEN DFHRESP(RESOURCEINUSE)
                   DISPLAY 'Specific resource is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected specific resource activation error'
           END-EVALUATE.

Specific Resource Management

Specific Resource Activation

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

Specific Resource Lifecycle

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

Specific Resource Monitoring

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

Specific Resource Error Recovery

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

Error Handling

Common Response Codes

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

Performance Considerations

Specific Resource Efficiency

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

System Impact

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

Best Practices

Specific Resource Activation Best Practices

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

Explain It Like I'm 5 Years Old

Think of CICS ACTIVATE (RESOURCE) like turning on a specific light switch:

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

Exercises

Exercise 1: Basic Specific Resource Activation

Create a program that activates basic specific resources.

Exercise 2: Advanced Specific Resource Management

Write a program that manages multiple specific resource activations.

Exercise 3: Error Handling

Implement comprehensive error handling for specific resource activation failures.

Related Concepts

Specific Resource Management

Managing specific system resources

Specific Resource Activation

Activating specific resources

Specific Resource Processing

Processing specific resources

Specific Resource Monitoring

Monitoring specific resources

Error Handling

Managing specific resource errors