What is CICS ISSUE EOI command used for?

CICS ISSUE EOI is used to signal the end of input in the system, providing end of input signaling capabilities and input completion management for CICS applications.

What types of input can be signaled for EOI?

Input types include terminal input (3270, 5250, VT100, ASCII terminals), file input (sequential, VSAM, QSAM, BDAM files), network input (TCP/IP, SNA, APPC, HTTP), and system input (operator, batch, JCL, parameter input).

How do I handle errors with CICS ISSUE EOI?

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

What is the purpose of end of input signaling?

End of input signaling enables EOI signal, input completion, input validation, input monitoring, input lifecycle management, input monitoring, and input error recovery in CICS applications.

When should I use CICS ISSUE EOI?

Use this command when you need to signal the end of input, complete input processing, manage input completion, or implement input EOI signaling in CICS applications.

CICS ISSUE EOI - End of Input Signal

CICS ISSUE EOI provides end of input signaling capabilities for programs and transactions. It enables programs to signal end of input, manage input completion, and handle input processing in CICS environments.

What is CICS ISSUE EOI?

CICS ISSUE EOI is a command that allows programs to signal the end of input in the system. It provides end of input signaling capabilities, input completion management, and input processing for CICS applications.

Command Syntax

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EXEC CICS ISSUE EOI
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

RESP(response-code) - Response code variable

Input Types

Terminal Input

Terminal input types

• 3270 TERMINALS - 3270 terminal input
• 5250 TERMINALS - 5250 terminal input
• VT100 TERMINALS - VT100 terminal input
• ASCII TERMINALS - ASCII terminal input

File Input

File input types

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

Network Input

Network input types

• TCP/IP INPUT - TCP/IP network input
• SNA INPUT - SNA network input
• APPC INPUT - APPC network input
• HTTP INPUT - HTTP network input

System Input

System input types

• OPERATOR INPUT - Operator console input
• BATCH INPUT - Batch job input
• JCL INPUT - JCL input
• PARAMETER INPUT - Parameter input

Programming Examples

Basic End of Input Signaling

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ISSUEEOI01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  INPUT-COUNT PIC S9(4) COMP VALUE 0.
       01  MAX-INPUT PIC S9(4) COMP VALUE 10.
       
       PROCEDURE DIVISION.
           DISPLAY 'Signaling end of input'
           
           EXEC CICS ISSUE EOI
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'End of input signaled successfully'
           ELSE
               DISPLAY 'End of input signal failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Input Management

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ISSUEEOI02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  INPUT-STATUS PIC X(1).
       01  INPUT-TYPE PIC X(8).
       01  INPUT-SOURCE PIC X(8).
       01  INPUT-LIST.
           05  INPUT-ITEM OCCURS 5 TIMES.
               10  INPUT-ID PIC X(8).
               10  INPUT-TYPE PIC X(8).
               10  INPUT-STATUS PIC X(1).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-INPUTS
           PERFORM SIGNAL-MULTIPLE-EOI
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-INPUTS.
           MOVE 'TERM001' TO INPUT-ID(1)
           MOVE '3270' TO INPUT-TYPE(1)
           MOVE 'TERM002' TO INPUT-ID(2)
           MOVE '5250' TO INPUT-TYPE(2)
           MOVE 'TERM003' TO INPUT-ID(3)
           MOVE 'VT100' TO INPUT-TYPE(3)
           MOVE 'TERM004' TO INPUT-ID(4)
           MOVE 'ASCII' TO INPUT-TYPE(4)
           MOVE 'TERM005' TO INPUT-ID(5)
           MOVE 'TCPIP' TO INPUT-TYPE(5).
       
       SIGNAL-MULTIPLE-EOI.
           PERFORM VARYING INPUT-COUNT FROM 1 BY 1
               UNTIL INPUT-COUNT > 5
               
               PERFORM SIGNAL-SINGLE-EOI
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE 'E' TO INPUT-STATUS(INPUT-COUNT)
                   DISPLAY 'Input ' INPUT-COUNT ' EOI signaled successfully'
               ELSE
                   MOVE 'F' TO INPUT-STATUS(INPUT-COUNT)
                   DISPLAY 'Input ' INPUT-COUNT ' EOI signal failed'
               END-IF
           END-PERFORM.
       
       SIGNAL-SINGLE-EOI.
           EXEC CICS ISSUE EOI
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with End of Input Signaling

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ISSUEEOI03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       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  EOI-SIGNAL-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM SIGNAL-EOI-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       SIGNAL-EOI-WITH-RETRY.
           PERFORM SIGNAL-EOI
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' EOI signal operation'
               PERFORM SIGNAL-EOI-WITH-RETRY
           END-IF.
       
       SIGNAL-EOI.
           EXEC CICS ISSUE EOI
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO EOI-SIGNAL-SUCCESSFUL
                   DISPLAY 'EOI signal operation successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized to signal EOI'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid EOI signal request'
               WHEN DFHRESP(INPUTERR)
                   DISPLAY 'Input EOI signal error'
               WHEN DFHRESP(INPUTNOTFOUND)
                   DISPLAY 'Input not found'
               WHEN DFHRESP(INPUTINUSE)
                   DISPLAY 'Input is in use'
               WHEN OTHER
                   DISPLAY 'Unexpected EOI signal error'
           END-EVALUATE.

Input Management

Input Completion

• EOI Signal - Signal end of input
• Input Close - Close input
• Input Validation - Validate input state
• Input Monitoring - Monitor input status

Input Lifecycle

• Input Creation - Create input
• Input Processing - Process input
• Input Completion - Complete input
• Input Cleanup - Clean up input

Input Monitoring

• Input Tracking - Track input usage
• Input Auditing - Audit input operations
• Input Reporting - Report input status
• Input Analysis - Analyze input patterns

Input Error Recovery

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

Error Handling

Common Response Codes

DFHRESP(NORMAL) - EOI signal operation successful
DFHRESP(NOTAUTH) - Not authorized to signal EOI
DFHRESP(INVREQ) - Invalid EOI signal request
DFHRESP(INPUTERR) - Input EOI signal error
DFHRESP(INPUTNOTFOUND) - Input not found
DFHRESP(INPUTINUSE) - Input is in use

Performance Considerations

Input Efficiency

• Optimize input operations - Use efficient input handling
• Minimize input overhead - Reduce input processing overhead
• Use input pooling - Implement input pooling
• Monitor input frequency - Track input EOI signal patterns

System Impact

• Monitor system impact - Track how EOI signal affects the system
• Optimize input handling - Ensure efficient input processing
• Manage input usage - Monitor input consumption
• Track performance metrics - Monitor input handling performance

Best Practices

End of Input Signaling Best Practices

• Signal EOI only when input processing is complete
• Implement proper error handling for input operations
• Validate input state before signaling EOI
• Use appropriate input management techniques
• Monitor input EOI signaling activities and performance
• Maintain input EOI signaling audit trails
• Handle input EOI signaling errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS ISSUE EOI like finishing reading a book:

• Reading Book: "You are reading a book" - Processing input
• Finished Reading: "You finished reading the book" - End of input
• Close Book: "Close the book" - Signal EOI
• Put Away: "Put the book away" - Input completion
• Done: "You are done with the book" - Input finished

Exercises

Exercise 1: Basic End of Input Signaling

Create a program that signals end of basic input.

Exercise 2: Advanced Input Management

Write a program that manages multiple input EOI signaling.

Exercise 3: Error Handling

Implement comprehensive error handling for input EOI signaling failures.

CICS ISSUE EOI - End of Input Signal

What is CICS ISSUE EOI?

Command Syntax

Parameters

Optional Parameters

Input Types

Terminal Input

File Input

Network Input

System Input

Programming Examples

Basic End of Input Signaling

Advanced Input Management

Error Handling with End of Input Signaling

Input Management

Input Completion

Input Lifecycle

Input Monitoring

Input Error Recovery

Error Handling

Common Response Codes

Performance Considerations

Input Efficiency

System Impact

Best Practices

End of Input Signaling Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic End of Input Signaling

Exercise 2: Advanced Input Management

Exercise 3: Error Handling

Related Concepts

Input Management

Input Completion

Input Processing

Input Monitoring

Error Handling

Related Pages