What types of event inquiry operations are available?

Inquiry types include status inquiry (pending, active, completed, failed), attribute inquiry (event, priority, timing, metadata), handler inquiry (registration, status, performance, configuration), and relationship inquiry (parent, child, related, dependency).

How do I handle errors with CICS INQUIRE EVENT?

Always check the response code and implement appropriate error handling, including validation of event existence, proper handling of inquiry errors, and authorization checks.

What is the purpose of event inquiry?

Event inquiry enables monitoring of event status, retrieval of event attributes, handler management, and relationship tracking for comprehensive event oversight.

When should I use CICS INQUIRE EVENT?

Use this command when you need to check event status, retrieve event information, monitor event handlers, or manage event relationships in CICS applications.

CICS INQUIRE EVENT - Event Inquiry Operations

Q: What is CICS INQUIRE EVENT command used for?

CICS INQUIRE EVENT is used to query event information, retrieve event details, and manage event inquiries in CICS applications for event monitoring and management.

CICS INQUIRE EVENT provides event inquiry capabilities in CICS environments. It enables programs to query event information, retrieve event details, and manage event inquiries in CICS applications.

What is CICS INQUIRE EVENT?

CICS INQUIRE EVENT is a command that allows programs to query event information, retrieve event details, and manage event inquiries in CICS environments. It provides event inquiry capabilities, status checking, and inquiry management for CICS applications.

Command Syntax

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EXEC CICS INQUIRE EVENT
    [EVENTID(event-id)]
    [INTO(data-area)]
    [LENGTH(data-length)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

EVENTID - Event identifier to inquire about
INTO - Data area to receive event information
LENGTH - Length of data to retrieve
RESP - Response code variable

Event Inquiry Types

Status Inquiry

Query event status information

• PENDING STATUS - Check if event is currently pending or waiting to be processed
• ACTIVE STATUS - Check if event is currently active and being processed
• COMPLETED STATUS - Check if event has been completed successfully
• FAILED STATUS - Check if event has failed or encountered an error

Attribute Inquiry

Query event attribute information

• EVENT ATTRIBUTES - Retrieve detailed event attribute information
• PRIORITY ATTRIBUTES - Retrieve event priority and scheduling information
• TIMING ATTRIBUTES - Retrieve event timing and scheduling information
• METADATA ATTRIBUTES - Retrieve event metadata and descriptive information

Handler Inquiry

Query event handler information

• HANDLER REGISTRATION - Retrieve information about registered event handlers
• HANDLER STATUS - Retrieve the current status of event handlers
• HANDLER PERFORMANCE - Retrieve performance metrics for event handlers
• HANDLER CONFIGURATION - Retrieve configuration settings for event handlers

Relationship Inquiry

Query event relationship information

• PARENT EVENTS - Retrieve information about parent or triggering events
• CHILD EVENTS - Retrieve information about child or dependent events
• RELATED EVENTS - Retrieve information about related or associated events
• DEPENDENCY RELATIONSHIPS - Retrieve information about event dependencies and relationships

Programming Examples

Basic Event Inquiry

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. INQUIRE01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  EVENT-ID         PIC X(8) VALUE 'EVT001'.
       01  DATA-AREA        PIC X(1000).
       01  DATA-LENGTH      PIC S9(8) COMP.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS INQUIRE EVENT
               EVENTID(EVENT-ID)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Event inquiry successful'
               DISPLAY 'Event ID: ' EVENT-ID
               DISPLAY 'Data length: ' DATA-LENGTH
           ELSE
               DISPLAY 'Failed to inquire event'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Event Status Check

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. INQUIRE02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  EVENT-ID         PIC X(8) VALUE 'EVT002'.
       01  DATA-AREA        PIC X(1000).
       01  DATA-LENGTH      PIC S9(8) COMP.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       01  EVENT-STATUS     PIC X(10).
       
       PROCEDURE DIVISION.
           EXEC CICS INQUIRE EVENT
               EVENTID(EVENT-ID)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               MOVE DATA-AREA(1:10) TO EVENT-STATUS
               DISPLAY 'Event Status: ' EVENT-STATUS
               
               EVALUATE EVENT-STATUS
                   WHEN 'PENDING'
                       DISPLAY 'Event is pending processing'
                   WHEN 'ACTIVE'
                       DISPLAY 'Event is currently active'
                   WHEN 'COMPLETED'
                       DISPLAY 'Event has been completed'
                   WHEN 'FAILED'
                       DISPLAY 'Event has failed'
                   WHEN OTHER
                       DISPLAY 'Unknown event status'
               END-EVALUATE
           ELSE
               DISPLAY 'Failed to check event status'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Error Handling with Event Inquiry

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. INQUIRE03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  EVENT-ID         PIC X(8) VALUE 'EVT003'.
       01  DATA-AREA        PIC X(1000).
       01  DATA-LENGTH      PIC S9(8) COMP.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS INQUIRE EVENT
               EVENTID(EVENT-ID)
               INTO(DATA-AREA)
               LENGTH(DATA-LENGTH)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'Event inquiry successful'
                   DISPLAY 'Event ID: ' EVENT-ID
               WHEN DFHRESP(NOTFND)
                   DISPLAY 'Event not found'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid inquiry request'
               WHEN DFHRESP(EVENTERR)
                   DISPLAY 'Event-specific error occurred'
               WHEN DFHRESP(INQUIREERR)
                   DISPLAY 'Inquiry-specific error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

Event Inquiry Management

Inquiry State Management

• Inquiry State Tracking - Track the current state of inquiry operations
• Inquiry State Maintenance - Maintain inquiry state across operations
• Inquiry Context Management - Manage inquiry context and environment
• Inquiry Session Management - Manage inquiry session lifecycle

Event Management

• Event Data Management - Manage event data during inquiry operations
• Event State Management - Manage event state during inquiry operations
• Event Metadata Management - Manage event metadata during inquiry operations
• Event Access Management - Manage event access during inquiry operations

Handler Management

• Handler Registration - Register event handlers during inquiry operations
• Handler Execution - Execute event handlers during inquiry operations
• Handler Cleanup - Clean up event handlers after inquiry operations
• Handler Monitoring - Monitor event handler performance during inquiry operations

Error Management

• Error Detection - Detect errors during inquiry operations
• Error Recovery - Recover from inquiry operation errors
• Error Reporting - Report inquiry operation errors
• Error Prevention - Prevent future inquiry operation errors

Error Handling

Common Response Codes

DFHRESP(NORMAL) - Event inquiry successful
DFHRESP(NOTFND) - Event not found
DFHRESP(INVREQ) - Invalid inquiry request
DFHRESP(EVENTERR) - Event-specific error
DFHRESP(INQUIREERR) - Inquiry-specific error
DFHRESP(AUTHORITYERR) - Authorization error

Performance Considerations

Inquiry Efficiency

• Optimize inquiry operations - Use appropriate inquiry methods for different event types
• Minimize inquiry overhead - Reduce the computational cost of inquiry operations
• Use efficient inquiry patterns - Implement inquiry strategies that minimize resource usage
• Monitor inquiry performance - Track the performance impact of inquiry operations

Resource Impact

• Monitor resource usage - Track how inquiry operations consume system resources
• Optimize resource allocation - Ensure efficient allocation of resources for inquiries
• Manage resource cleanup - Properly clean up resources after inquiry operations
• Track resource utilization - Monitor the overall resource consumption patterns

Best Practices

Event Inquiry Best Practices

• Always check response codes
• Use appropriate inquiry parameters
• Implement proper error handling
• Ensure proper inquiry state management
• Validate inquiry operations
• Optimize inquiry operations
• Clean up resources properly

Explain It Like I'm 5 Years Old

Think of CICS INQUIRE EVENT like asking about a party:

• Party Name: "Which party to ask about" - The event ID
• Ask Questions: "Ask about the party" - Inquire about event
• Get Answers: "Get information about the party" - Receive event details
• Check Status: "See if party is happening or finished" - Check event status
• Learn More: "Find out more about the party" - Get detailed event information

Exercises

Exercise 1: Basic Event Inquiry

Create a program that inquires about event information using INQUIRE EVENT.

Exercise 2: Event Status Check

Write a program that checks the status of multiple events using INQUIRE EVENT.

Exercise 3: Error Handling

Implement comprehensive error handling for event inquiry failures and invalid event IDs.

CICS INQUIRE EVENT - Event Inquiry Operations

What is CICS INQUIRE EVENT?

Command Syntax

Parameters

Optional Parameters

Event Inquiry Types

Status Inquiry

Attribute Inquiry

Handler Inquiry

Relationship Inquiry

Programming Examples

Basic Event Inquiry

Event Status Check

Error Handling with Event Inquiry

Event Inquiry Management

Inquiry State Management

Event Management

Handler Management

Error Management

Error Handling

Common Response Codes

Performance Considerations

Inquiry Efficiency

Resource Impact

Best Practices

Event Inquiry Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic Event Inquiry

Exercise 2: Event Status Check

Exercise 3: Error Handling

Related Concepts

Event Management

Inquiry Operations

Event Handlers

Event Processing

Error Handling

Related Pages