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CICS ADAPTER - Adapter Management

CICS ADAPTER provides adapter management capabilities for programs and transactions. It enables programs to manage adapters, process adapter data, and handle adapter operations in CICS environments.

What is CICS ADAPTER?

CICS ADAPTER is a command that allows programs to manage adapters in the system. It provides adapter management capabilities, adapter processing, and adapter operations for CICS applications.

Command Syntax

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EXEC CICS ADAPTER
    [ADAPTER(adapter-name)]
    [ACTION(action-type)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

  • ADAPTER(adapter-name) - Name of adapter to manage
  • ACTION(action-type) - Type of action to perform
  • RESP(response-code) - Response code variable

Adapter Types

Communication Adapters

Communication adapter types

  • • TCP/IP ADAPTER - TCP/IP communication adapters
  • • SNA ADAPTER - SNA communication adapters
  • • APPC ADAPTER - APPC communication adapters
  • • HTTP ADAPTER - HTTP communication adapters

Data Adapters

Data adapter types

  • • DATABASE ADAPTER - Database adapters
  • • FILE ADAPTER - File adapters
  • • QUEUE ADAPTER - Queue adapters
  • • STORAGE ADAPTER - Storage adapters

System Adapters

System adapter types

  • • SYSTEM ADAPTER - System adapters
  • • MONITOR ADAPTER - Monitor adapters
  • • SECURITY ADAPTER - Security adapters
  • • MANAGEMENT ADAPTER - Management adapters

Application Adapters

Application adapter types

  • • APPLICATION ADAPTER - Application adapters
  • • SERVICE ADAPTER - Service adapters
  • • INTERFACE ADAPTER - Interface adapters
  • • PROTOCOL ADAPTER - Protocol adapters

Programming Examples

Basic Adapter Management

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ADAPTER01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ADAPTER-NAME PIC X(8) VALUE 'MYADP001'.
       01  ACTION-TYPE PIC X(8) VALUE 'START'.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Managing adapter'
           DISPLAY 'Adapter: ' ADAPTER-NAME
           DISPLAY 'Action: ' ACTION-TYPE
           
           EXEC CICS ADAPTER
               ADAPTER(ADAPTER-NAME)
               ACTION(ACTION-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Adapter managed successfully'
           ELSE
               DISPLAY 'Adapter management failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Adapter Processing

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ADAPTER02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ADAPTER-NAME PIC X(8).
       01  ACTION-TYPE PIC X(8).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  ADAPTER-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-ADAPTERS PIC S9(2) COMP VALUE 4.
       01  ADAPTER-STATUS PIC X(1).
       01  ADAPTER-LIST.
           05  ADAPTER-ITEM OCCURS 4 TIMES.
               10  ADAPTER-ID PIC X(8).
               10  ADAPTER-ACTION PIC X(8).
               10  ADAPTER-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-ADAPTERS
           PERFORM MANAGE-MULTIPLE-ADAPTERS
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-ADAPTERS.
           MOVE 'ADP001' TO ADAPTER-ID(1)
           MOVE 'START' TO ADAPTER-ACTION(1)
           MOVE 'ADP002' TO ADAPTER-ID(2)
           MOVE 'STOP' TO ADAPTER-ACTION(2)
           MOVE 'ADP003' TO ADAPTER-ID(3)
           MOVE 'RESTART' TO ADAPTER-ACTION(3)
           MOVE 'ADP004' TO ADAPTER-ID(4)
           MOVE 'QUERY' TO ADAPTER-ACTION(4).
       
       MANAGE-MULTIPLE-ADAPTERS.
           PERFORM VARYING ADAPTER-COUNT FROM 1 BY 1
               UNTIL ADAPTER-COUNT > MAX-ADAPTERS
               
               MOVE ADAPTER-ID(ADAPTER-COUNT) TO ADAPTER-NAME
               MOVE ADAPTER-ACTION(ADAPTER-COUNT) TO ACTION-TYPE
               PERFORM MANAGE-SINGLE-ADAPTER
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'S' TO ADAPTER-STATUS(ADAPTER-COUNT)
                   DISPLAY 'Adapter ' ADAPTER-COUNT ' managed successfully'
               ELSE
                   MOVE 'F' TO ADAPTER-STATUS(ADAPTER-COUNT)
                   DISPLAY 'Adapter ' ADAPTER-COUNT ' management failed'
               END-IF
           END-PERFORM.
       
       MANAGE-SINGLE-ADAPTER.
           EXEC CICS ADAPTER
               ADAPTER(ADAPTER-NAME)
               ACTION(ACTION-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Adapter Management

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ADAPTER03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ADAPTER-NAME PIC X(8) VALUE 'MYADP001'.
       01  ACTION-TYPE PIC X(8) VALUE 'START'.
       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  ADAPTER-MANAGE-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM MANAGE-ADAPTER-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       MANAGE-ADAPTER-WITH-RETRY.
           PERFORM MANAGE-ADAPTER
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' adapter management operation'
               PERFORM MANAGE-ADAPTER-WITH-RETRY
           END-IF.
       
       MANAGE-ADAPTER.
           EXEC CICS ADAPTER
               ADAPTER(ADAPTER-NAME)
               ACTION(ACTION-TYPE)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO ADAPTER-MANAGE-SUCCESSFUL
                   DISPLAY 'Adapter management operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to manage adapter'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid adapter management request'
               WHEN DFHRESP(ADAPTERERR)
                   DISPLAY 'Adapter management error'
               WHEN DFHRESP(ADAPTERNOTFOUND)
                   DISPLAY 'Adapter not found'
               WHEN DFHRESP(ADAPTERINUSE)
                   DISPLAY 'Adapter is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected adapter management error'
           END-EVALUATE.

Adapter Management

Adapter Operations

  • • Adapter Start - Start adapters
  • • Adapter Stop - Stop adapters
  • • Adapter Restart - Restart adapters
  • • Adapter Query - Query adapters

Adapter Lifecycle

  • • Adapter Creation - Create adapters
  • • Adapter Processing - Process adapters
  • • Adapter Completion - Complete adapters
  • • Adapter Cleanup - Clean up adapters

Adapter Monitoring

  • • Adapter Tracking - Track adapter usage
  • • Adapter Auditing - Audit adapter operations
  • • Adapter Reporting - Report adapter status
  • • Adapter Analysis - Analyze adapter patterns

Adapter Error Recovery

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

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Adapter management operation successful
  • DFHRESP(NOTAUTH) - Not authorized to manage adapter
  • DFHRESP(INVREQ) - Invalid adapter management request
  • DFHRESP(ADAPTERERR) - Adapter management error
  • DFHRESP(ADAPTERNOTFOUND) - Adapter not found
  • DFHRESP(ADAPTERINUSE) - Adapter is in use

Performance Considerations

Adapter Efficiency

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

System Impact

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

Best Practices

Adapter Management Best Practices

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

Explain It Like I'm 5 Years Old

Think of CICS ADAPTER like managing a toy robot:

  • • Toy Robot: "You see a toy robot" - Adapter available
  • • Turn On Robot: "Turn on the toy robot" - Start adapter
  • • Robot Working: "The robot is working" - Adapter processing
  • • Use Robot: "Use the robot" - Process adapter
  • • Turn Off Robot: "Turn off the robot" - Stop adapter

Exercises

Exercise 1: Basic Adapter Management

Create a program that manages basic adapters.

Exercise 2: Advanced Adapter Processing

Write a program that processes multiple adapter management operations.

Exercise 3: Error Handling

Implement comprehensive error handling for adapter management failures.

Related Concepts

Adapter Management

Managing system adapters

Adapter Processing

Processing adapters

Adapter Operations

Adapter operations

Adapter Monitoring

Monitoring adapters

Error Handling

Managing adapter errors