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CICS STARTBROWSE CONTAINER (BTS) - BTS Container Browse Initialization

CICS STARTBROWSE CONTAINER (BTS) provides Business Transaction Services container browse initialization capabilities in CICS environments. It enables programs to initialize BTS container browse operations, manage container browsing, and handle container browse sessions in CICS applications.

What is CICS STARTBROWSE CONTAINER (BTS)?

CICS STARTBROWSE CONTAINER (BTS) is a command that allows programs to initialize Business Transaction Services container browse operations, manage container browsing, and handle container browse sessions in CICS environments. It provides BTS container browse initialization capabilities, browse management, and session handling for CICS applications.

Command Syntax

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

Parameters

Required Parameters

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

Optional Parameters

  • CONTAINER - Container name to start browsing from
  • RESP - Response code variable

BTS Container Browse Initialization Types

Sequential Browse

Initialize sequential container browsing

  • • FORWARD BROWSE - Initialize forward sequential browsing through containers
  • • BACKWARD BROWSE - Initialize backward sequential browsing through containers
  • • BIDIRECTIONAL BROWSE - Initialize bidirectional browsing through containers
  • • LINEAR BROWSE - Initialize linear browsing through containers in order

Channel Browse

Initialize channel-based container browsing

  • • CHANNEL-SPECIFIC BROWSE - Initialize browsing through containers in specific channels
  • • MULTI-CHANNEL BROWSE - Initialize browsing across multiple channels
  • • CHANNEL-GROUP BROWSE - Initialize browsing through channel groups
  • • CHANNEL-PATTERN BROWSE - Initialize browsing through channels matching patterns

Conditional Browse

Initialize conditional container browsing

  • • STATUS-BASED BROWSE - Initialize browsing based on container status conditions
  • • TYPE-BASED BROWSE - Initialize browsing based on container type conditions
  • • SIZE-BASED BROWSE - Initialize browsing based on container size conditions
  • • FILTERED BROWSE - Initialize browsing with specific filter conditions

Batch Browse

Initialize batch container browsing

  • • BATCH BROWSE - Initialize browsing through multiple containers in batch
  • • GROUP BROWSE - Initialize browsing through related container groups
  • • CATEGORY BROWSE - Initialize browsing through container categories
  • • PATTERN BROWSE - Initialize browsing through containers matching patterns

Programming Examples

Basic Container Browse Initialization

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. STARTBROWSE01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(20) VALUE 'MAIN_CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ001'.
       01  CONTAINER-NAME   PIC X(20) VALUE 'CONTAINER_001'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS STARTBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               CONTAINER(CONTAINER-NAME)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Container browse initialized successfully'
               DISPLAY 'Channel: ' CHANNEL-NAME
               DISPLAY 'Request ID: ' REQUEST-ID
               DISPLAY 'Starting Container: ' CONTAINER-NAME
           ELSE
               DISPLAY 'Failed to initialize container browse'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Channel-Based Container Browse

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. STARTBROWSE02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(20) VALUE 'PROCESS_CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ002'.
       01  CONTAINER-NAME   PIC X(20).
       01  RESPONSE-CODE    PIC S9(8) COMP.
       01  CONTAINER-COUNT  PIC 9(3) VALUE 0.
       
       PROCEDURE DIVISION.
           EXEC CICS STARTBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Channel-based container browse initialized'
               DISPLAY 'Channel: ' CHANNEL-NAME
               DISPLAY 'Request ID: ' REQUEST-ID
               
               PERFORM PROCESS-CONTAINERS
               UNTIL RESPONSE-CODE NOT = DFHRESP(NORMAL)
           ELSE
               DISPLAY 'Failed to initialize channel-based browse'
           END-IF
           
           EXEC CICS RETURN END-EXEC.
       
       PROCESS-CONTAINERS.
           EXEC CICS GETNEXT CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               CONTAINER(CONTAINER-NAME)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               ADD 1 TO CONTAINER-COUNT
               DISPLAY 'Processing Container ' CONTAINER-COUNT ': ' CONTAINER-NAME
           END-IF.

Error Handling with Container Browse

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. STARTBROWSE03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  CHANNEL-NAME     PIC X(20) VALUE 'MESSAGE_CHANNEL'.
       01  REQUEST-ID       PIC X(8) VALUE 'REQ003'.
       01  CONTAINER-NAME   PIC X(20) VALUE 'MESSAGE_CONTAINER'.
       01  RESPONSE-CODE    PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           EXEC CICS STARTBROWSE CONTAINER
               CHANNEL(CHANNEL-NAME)
               REQID(REQUEST-ID)
               CONTAINER(CONTAINER-NAME)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   DISPLAY 'Container browse initialized successfully'
                   DISPLAY 'Channel: ' CHANNEL-NAME
                   DISPLAY 'Request ID: ' REQUEST-ID
                   DISPLAY 'Starting Container: ' CONTAINER-NAME
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid browse request'
               WHEN DFHRESP(CONTAINERERR)
                   DISPLAY 'Container-specific error occurred'
               WHEN DFHRESP(CHANNELERR)
                   DISPLAY 'Channel-specific error occurred'
               WHEN DFHRESP(BROWSEERR)
                   DISPLAY 'Browse-specific error occurred'
               WHEN OTHER
                   DISPLAY 'Unexpected error occurred'
           END-EVALUATE
           
           EXEC CICS RETURN END-EXEC.

BTS Container Browse Management

Browse Session Management

  • • Session Initialization - Initialize browse sessions and establish browse context
  • • Session State Management - Manage browse session state and maintain session continuity
  • • Session Context Management - Manage browse session context and environment
  • • Session Lifecycle Management - Manage browse session lifecycle from initialization to termination

Container Management

  • • Container Data Management - Manage container data during browse operations
  • • Container State Management - Manage container state during browse operations
  • • Container Metadata Management - Manage container metadata during browse operations
  • • Container Access Management - Manage container access during browse operations

Channel Management

  • • Channel State Management - Manage channel state during browse operations
  • • Channel Context Management - Manage channel context during browse operations
  • • Channel Access Management - Manage channel access during browse operations
  • • Channel Session Management - Manage channel session lifecycle

Error Management

  • • Error Detection - Detect errors during browse initialization
  • • Error Recovery - Recover from browse initialization errors
  • • Error Reporting - Report browse initialization errors
  • • Error Prevention - Prevent future browse initialization errors

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Container browse initialized successfully
  • DFHRESP(INVREQ) - Invalid browse request
  • DFHRESP(CONTAINERERR) - Container-specific error
  • DFHRESP(CHANNELERR) - Channel-specific error
  • DFHRESP(BROWSEERR) - Browse-specific error
  • DFHRESP(AUTHORITYERR) - Authorization error

Performance Considerations

Browse Efficiency

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

Resource Impact

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

Best Practices

BTS Container Browse Initialization Best Practices

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

Explain It Like I'm 5 Years Old

Think of CICS STARTBROWSE CONTAINER (BTS) like starting to look through boxes in a room:

  • • Room Name: "Which room to look in" - The channel name
  • • List Name: "Which list to use" - The request ID
  • • Start Looking: "Start looking through boxes" - Initialize browse
  • • Pick Starting Box: "Pick which box to start with" - Set starting container
  • • Ready to Look: "Ready to look through boxes" - Browse initialized

Exercises

Exercise 1: Basic Container Browse

Create a program that initializes BTS container browsing using STARTBROWSE CONTAINER.

Exercise 2: Channel-Based Container Browse

Write a program that initializes channel-based container browsing with multiple containers.

Exercise 3: Error Handling

Implement comprehensive error handling for container browse initialization failures.

Related Concepts

BTS Management

Managing Business Transaction Services

Container Management

Managing BTS containers

Browse Operations

Managing browse operations

Channel Management

Managing BTS channels

Error Handling

Managing browse errors