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CICS ENDBROWSE CONTAINER (CHANNEL) - Channel Container Browse Termination

CICS ENDBROWSE CONTAINER (CHANNEL) provides channel container browse termination capabilities in CICS environments. It enables programs to terminate channel container browse operations, manage browse cleanup, and handle browse termination in CICS applications.

What is CICS ENDBROWSE CONTAINER (CHANNEL)?

CICS ENDBROWSE CONTAINER (CHANNEL) is a command that allows programs to terminate channel container browse operations, manage browse cleanup, and handle browse termination in CICS environments. It provides browse termination capabilities, cleanup management, and termination handling for CICS applications.

Command Syntax

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EXEC CICS ENDBROWSE CONTAINER
    [CHANNEL(channel-name)]
    [REQID(request-id)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • CHANNEL - Channel name for browse termination
  • REQID - Request identifier for the browse operation

Optional Parameters

  • RESP - Response code variable

Browse Termination Types

Normal Termination

Terminate browse operations normally

  • • COMPLETION TERMINATION - Terminate browse when all containers processed
  • • SUCCESS TERMINATION - Terminate browse after successful completion
  • • NORMAL TERMINATION - Terminate browse in normal course of operation
  • • PLANNED TERMINATION - Terminate browse as planned in application logic

Early Termination

Terminate browse operations early

  • • EARLY TERMINATION - Terminate browse before all containers processed
  • • CONDITIONAL TERMINATION - Terminate browse based on specific conditions
  • • ERROR TERMINATION - Terminate browse due to error conditions
  • • ABORT TERMINATION - Terminate browse due to abort conditions

Resource Termination

Terminate browse operations for resource management

  • • RESOURCE TERMINATION - Terminate browse for resource management
  • • MEMORY TERMINATION - Terminate browse to free memory resources
  • • STORAGE TERMINATION - Terminate browse to free storage resources
  • • CAPACITY TERMINATION - Terminate browse due to capacity constraints

Session Termination

Terminate browse operations for session management

  • • SESSION TERMINATION - Terminate browse for session management
  • • TIMEOUT TERMINATION - Terminate browse due to timeout conditions
  • • USER TERMINATION - Terminate browse due to user request
  • • SYSTEM TERMINATION - Terminate browse due to system requirements

Programming Examples

Basic Browse Termination

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ENDBROWSE01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(16) VALUE 'MAIN-CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ001'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS ENDBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Browse terminated successfully'
               DISPLAY 'Channel Name: ' CHANNEL-NAME
               DISPLAY 'Request ID: ' REQUEST-ID
           ELSE
               DISPLAY 'Failed to terminate browse'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Conditional Browse Termination

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ENDBROWSE02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(16) VALUE 'DATA-CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ002'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       01  CONTAINER-COUNT  PIC 9(3) VALUE 0.
       01  MAX-CONTAINERS   PIC 9(3) VALUE 100.
       
       PROCEDURE DIVISION.
           PERFORM PROCESS-CONTAINERS
               UNTIL CONTAINER-COUNT >= MAX-CONTAINERS
               OR RESPONSE-CODE NOT = DFHRESP(NORMAL)
           
           EXEC CICS ENDBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Conditional browse termination successful'
               DISPLAY 'Channel Name: ' CHANNEL-NAME
               DISPLAY 'Request ID: ' REQUEST-ID
               DISPLAY 'Containers processed: ' CONTAINER-COUNT
           ELSE
               DISPLAY 'Failed to terminate conditional browse'
           END-IF
           
           EXEC CICS RETURN END-EXEC.
       
       PROCESS-CONTAINERS.
           EXEC CICS GETNEXT CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               ADD 1 TO CONTAINER-COUNT
               DISPLAY 'Processing container ' CONTAINER-COUNT
           END-IF.

Error Handling with Browse Termination

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ENDBROWSE03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(16) VALUE 'TEST-CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ003'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS ENDBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'Browse termination successful'
                   DISPLAY 'Channel Name: ' CHANNEL-NAME
                   DISPLAY 'Request ID: ' REQUEST-ID
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid termination request'
               WHEN DFHRESP(CHANNELERR)
                   DISPLAY 'Channel-specific error occurred'
               WHEN DFHRESP(BROWSEERR)
                   DISPLAY 'Browse-specific error occurred'
               WHEN DFHRESP(AUTHORITYERR)
                   DISPLAY 'Authorization error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

Browse Termination Management

Session Management

  • • Session Cleanup - Clean up browse session resources and state
  • • Session Termination - Terminate browse sessions properly
  • • Session Monitoring - Monitor browse session status and health
  • • Session Recovery - Recover from browse session failures

Resource Management

  • • Resource Cleanup - Clean up browse resources and free allocated memory
  • • Resource Deallocation - Deallocate resources used by browse operations
  • • Resource Monitoring - Monitor resource usage during termination
  • • Resource Optimization - Optimize resource usage for termination operations

Operation Management

  • • Operation Tracking - Track termination operations and their status
  • • Operation Validation - Validate termination operations and ensure correctness
  • • Operation Recovery - Recover from failed termination operations
  • • Operation Monitoring - Monitor termination operations and performance

Error Management

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

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Browse terminated successfully
  • DFHRESP(INVREQ) - Invalid termination request
  • DFHRESP(CHANNELERR) - Channel-specific error
  • DFHRESP(BROWSEERR) - Browse-specific error
  • DFHRESP(AUTHORITYERR) - Authorization error
  • DFHRESP(RESOURCEERR) - Resource error

Performance Considerations

Termination Efficiency

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

Resource Impact

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

Best Practices

Browse Termination Best Practices

  • • Always check response codes
  • • Use appropriate termination parameters
  • • Implement proper error handling
  • • Ensure proper resource cleanup
  • • Validate termination operations
  • • Optimize termination operations
  • • Clean up resources properly

Explain It Like I'm 5 Years Old

Think of CICS ENDBROWSE CONTAINER (CHANNEL) like stopping reading a book:

  • • Book Name: "Which book to stop reading" - The channel name
  • • Stop Reading: "Close the book and stop reading" - End browse
  • • Book Closed: "Book is now closed" - Browse terminated
  • • Clean Up: "Put book away neatly" - Resource cleanup
  • • All Done: "Finished reading the book" - Browse completed

Exercises

Exercise 1: Basic Browse Termination

Create a program that terminates channel container browse operations using ENDBROWSE CONTAINER.

Exercise 2: Conditional Termination

Write a program that terminates browse operations based on specific conditions.

Exercise 3: Error Handling

Implement comprehensive error handling for browse termination failures.

Related Concepts

Browse Operations

Managing browse operations

Container Management

Managing channel containers

Channel Management

Managing system channels

Resource Cleanup

Cleaning up system resources

Error Handling

Managing termination errors