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CICS GDS EXTRACT PROCESS - GDS Process Information Extraction

CICS GDS EXTRACT PROCESS provides GDS process information extraction capabilities for programs and transactions. It enables programs to extract GDS process data, retrieve GDS process attributes, and handle GDS process information in CICS environments.

What is CICS GDS EXTRACT PROCESS?

CICS GDS EXTRACT PROCESS is a command that allows programs to extract information from GDS processes in the system. It provides GDS process information extraction capabilities, GDS process data retrieval, and GDS process attribute management for CICS applications.

Command Syntax

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EXEC CICS GDS EXTRACT PROCESS
    PROCESS(process-name)
    [INTO(data-area)]
    [LENGTH(data-length)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • PROCESS(process-name) - Name of GDS process to extract from

Optional Parameters

  • INTO(data-area) - Data area to receive extracted information
  • LENGTH(data-length) - Length of data area
  • RESP(response-code) - Response code variable

GDS Process Information Types

GDS Process Attributes

GDS process attribute information

  • • PROCESS ID - GDS process identifier
  • • PROCESS TYPE - GDS process type
  • • PROCESS STATUS - GDS process status
  • • PROCESS STATE - GDS process state

GDS Process Data

GDS process data information

  • • PROCESS DATA - GDS process data
  • • PROCESS BUFFER - GDS process buffer
  • • PROCESS QUEUE - GDS process queue
  • • PROCESS MESSAGE - GDS process message

GDS Process Control

GDS process control information

  • • PROCESS CONTROL - GDS process control
  • • PROCESS MONITOR - GDS process monitor
  • • PROCESS MANAGER - GDS process manager
  • • PROCESS HANDLER - GDS process handler

GDS Process Communication

GDS process communication information

  • • PROCESS CONVERSATION - GDS process conversation
  • • PROCESS SESSION - GDS process session
  • • PROCESS CONNECTION - GDS process connection
  • • PROCESS CHANNEL - GDS process channel

Programming Examples

Basic GDS Process Information Extraction

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. GDSEXTR01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-NAME PIC X(8) VALUE 'GDSAPP01'.
       01  DATA-AREA PIC X(100).
       01  DATA-LENGTH PIC S9(4) COMP VALUE 100.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Extracting GDS process information'
           DISPLAY 'Process: ' PROCESS-NAME
           
           EXEC CICS GDS EXTRACT PROCESS
               PROCESS(PROCESS-NAME)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'GDS process information extracted successfully'
               DISPLAY 'Data: ' DATA-AREA
           ELSE
               DISPLAY 'GDS process information extraction failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced GDS Process Data Retrieval

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. GDSEXTR02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-NAME PIC X(8).
       01  DATA-AREA PIC X(100).
       01  DATA-LENGTH PIC S9(4) COMP VALUE 100.
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  EXTRACT-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-EXTRACTS PIC S9(2) COMP VALUE 3.
       01  GDS-STATUS PIC X(1).
       01  PROCESS-LIST.
           05  PROCESS-ITEM OCCURS 3 TIMES.
               10  PROCESS-ID PIC X(8).
               10  PROCESS-TYPE PIC X(8).
               10  PROCESS-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-GDS-PROCESSES
           PERFORM EXTRACT-MULTIPLE-GDS-PROCESSES
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-GDS-PROCESSES.
           MOVE 'GDSAPP01' TO PROCESS-ID(1)
           MOVE 'APPLICATION' TO PROCESS-TYPE(1)
           MOVE 'GDSAPP02' TO PROCESS-ID(2)
           MOVE 'SERVICE' TO PROCESS-TYPE(2)
           MOVE 'GDSAPP03' TO PROCESS-ID(3)
           MOVE 'UTILITY' TO PROCESS-TYPE(3).
       
       EXTRACT-MULTIPLE-GDS-PROCESSES.
           PERFORM VARYING EXTRACT-COUNT FROM 1 BY 1
               UNTIL EXTRACT-COUNT > MAX-EXTRACTS
               
               MOVE PROCESS-ID(EXTRACT-COUNT) TO PROCESS-NAME
               PERFORM EXTRACT-SINGLE-GDS-PROCESS
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'E' TO PROCESS-STATUS(EXTRACT-COUNT)
                   DISPLAY 'GDS process ' EXTRACT-COUNT ' extracted successfully'
               ELSE
                   MOVE 'F' TO PROCESS-STATUS(EXTRACT-COUNT)
                   DISPLAY 'GDS process ' EXTRACT-COUNT ' extraction failed'
               END-IF
           END-PERFORM.
       
       EXTRACT-SINGLE-GDS-PROCESS.
           EXEC CICS GDS EXTRACT PROCESS
               PROCESS(PROCESS-NAME)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with GDS Process Information Extraction

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. GDSEXTR03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PROCESS-NAME PIC X(8) VALUE 'GDSAPP01'.
       01  DATA-AREA PIC X(100).
       01  DATA-LENGTH PIC S9(4) COMP VALUE 100.
       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  GDS-EXTRACT-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM EXTRACT-GDS-PROCESS-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       EXTRACT-GDS-PROCESS-WITH-RETRY.
           PERFORM EXTRACT-GDS-PROCESS
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' GDS process extraction'
               PERFORM EXTRACT-GDS-PROCESS-WITH-RETRY
           END-IF.
       
       EXTRACT-GDS-PROCESS.
           EXEC CICS GDS EXTRACT PROCESS
               PROCESS(PROCESS-NAME)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO GDS-EXTRACT-SUCCESSFUL
                   DISPLAY 'GDS process extraction successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to extract GDS process information'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid GDS process extraction request'
               WHEN DFHRESP(PROCESSERR)
                   DISPLAY 'GDS process extraction error'
               WHEN DFHRESP(PROCESSNOTFOUND)
                   DISPLAY 'GDS process not found'
               WHEN DFHRESP(PROCESSINUSE)
                   DISPLAY 'GDS process is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected GDS process extraction error'
           END-EVALUATE.

GDS Process Information Management

GDS Process Information Extraction

  • • GDS Process Extract - Extract GDS process information
  • • GDS Process Data Retrieval - Retrieve GDS process data
  • • GDS Process Validation - Validate GDS process information
  • • GDS Process Monitoring - Monitor GDS process status

GDS Process Information Lifecycle

  • • GDS Process Creation - Create GDS process information
  • • GDS Process Extraction - Extract GDS process information
  • • GDS Process Usage - Use GDS process information
  • • GDS Process Cleanup - Clean up GDS process information

GDS Process Information Monitoring

  • • GDS Process Tracking - Track GDS process information usage
  • • GDS Process Auditing - Audit GDS process information operations
  • • GDS Process Reporting - Report GDS process information status
  • • GDS Process Analysis - Analyze GDS process information patterns

GDS Error Recovery

  • • GDS Error Detection - Detect GDS process information errors
  • • GDS Error Recovery - Recover from GDS process information errors
  • • GDS Retry Mechanisms - Implement GDS retry logic
  • • GDS Fallback Procedures - Use GDS fallback procedures

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - GDS process information extraction successful
  • DFHRESP(NOTAUTH) - Not authorized to extract GDS process information
  • DFHRESP(INVREQ) - Invalid GDS process extraction request
  • DFHRESP(PROCESSERR) - GDS process extraction error
  • DFHRESP(PROCESSNOTFOUND) - GDS process not found
  • DFHRESP(PROCESSINUSE) - GDS process is in use

Performance Considerations

GDS Process Efficiency

  • • Optimize GDS process operations - Use efficient GDS process handling
  • • Minimize GDS process overhead - Reduce GDS process processing overhead
  • • Use GDS process caching - Implement GDS process caching
  • • Monitor GDS process frequency - Track GDS process extraction patterns

System Impact

  • • Monitor system impact - Track how GDS process extraction affects the system
  • • Optimize GDS process handling - Ensure efficient GDS process processing
  • • Manage GDS process usage - Monitor GDS process consumption
  • • Track performance metrics - Monitor GDS process handling performance

Best Practices

GDS Process Information Extraction Best Practices

  • • Extract GDS process information only when needed
  • • Implement proper error handling for GDS process operations
  • • Validate GDS process state before extracting
  • • Use appropriate GDS process management techniques
  • • Monitor GDS process extraction activities and performance
  • • Maintain GDS process extraction audit trails
  • • Handle GDS process extraction errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS GDS EXTRACT PROCESS like asking your friend questions:

  • • Want to Know: "You want to know something about your friend" - Need to extract GDS process information
  • • Ask Question: "Ask your friend a question" - Extract from GDS process
  • • Friend Answers: "Your friend answers your question" - GDS process information extracted
  • • Get Information: "You get the information you wanted" - Receive GDS process data
  • • Use Information: "Use the information you got" - Process GDS process information

Exercises

Exercise 1: Basic GDS Process Information Extraction

Create a program that extracts basic GDS process information.

Exercise 2: Advanced GDS Process Data Retrieval

Write a program that manages multiple GDS process information extractions.

Exercise 3: Error Handling

Implement comprehensive error handling for GDS process information extraction failures.

Related Concepts

GDS Process Management

Managing GDS system processes

GDS Process Information Extraction

Extracting GDS process information

GDS Process Monitoring

Monitoring GDS process usage

GDS Process Data Retrieval

Retrieving GDS process data

Error Handling

Managing GDS process errors