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CICS WRITE JOURNALNAME - Journal Name Writing

CICS WRITE JOURNALNAME writes data to a journal with a specific name. It enables programs to write to journals, manage journal operations, and handle journal name writing in CICS applications.

What is CICS WRITE JOURNALNAME?

CICS WRITE JOURNALNAME is a command that allows programs to write data to a journal with a specific name. It provides journal writing capabilities, data storage, and journal management for CICS applications.

Command Syntax

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EXEC CICS WRITE JOURNALNAME
    JOURNALNAME(journal-name)
    FROM(data-area)
    LENGTH(data-length)
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • JOURNALNAME(journal-name) - Name of the journal to write to
  • FROM(data-area) - Data area containing the data to write
  • LENGTH(data-length) - Length of the data to write

Optional Parameters

  • RESP(response-code) - Response code variable

Programming Examples

Basic Journal Writing

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WORKING-STORAGE SECTION.
01  JOURNAL-NAME         PIC X(8) VALUE 'MYJOURNAL'.
01  JOURNAL-DATA          PIC X(100) VALUE 'This is journal data'.
01  JOURNAL-LENGTH        PIC S9(8) COMP VALUE 100.
01  RESPONSE-CODE        PIC S9(8) COMP.
 
PROCEDURE DIVISION.
    DISPLAY 'Writing to journal: ' JOURNAL-NAME
    
    *> Write data to the journal
    EXEC CICS WRITE JOURNALNAME
        JOURNALNAME(JOURNAL-NAME)
        FROM(JOURNAL-DATA)
        LENGTH(JOURNAL-LENGTH)
        RESP(RESPONSE-CODE)
    END-EXEC.
    
    IF RESPONSE-CODE = DFHRESP(NORMAL)
        DISPLAY 'Journal written successfully'
        DISPLAY 'Data written: ' JOURNAL-DATA(1:JOURNAL-LENGTH)
    ELSE
        DISPLAY 'Error writing to journal: ' RESPONSE-CODE
    END-IF.

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Journal written successfully
  • DFHRESP(INVREQ) - Invalid request or parameter
  • DFHRESP(LENGERR) - Data area length error
  • DFHRESP(NOTAUTH) - Not authorized to write to journal

Performance Considerations

Efficiency

  • • Lightweight Operation - WRITE JOURNALNAME is a lightweight command with minimal performance impact
  • • Data Area Size - Use appropriate data area size to avoid truncation
  • • Storage Impact - Consider the impact of large data writes on journal storage

Best Practices

  • • Error Handling - Always check the response code for error handling
  • • Journal Naming - Use meaningful journal names for easier management
  • • Coordination - Coordinate journal writing with journal waiting

Explain It Like I'm 5 Years Old

Think of CICS WRITE JOURNALNAME like writing in a special notebook:

  • • Special Notebook: "You have a special notebook with your name on it" - Journal name
  • • Write Message: "You write a message in your notebook" - Write data
  • • Message Length: "You count how many words you wrote" - Data length
  • • Save Message: "You save the message in your notebook" - Journal written

Exercises

Exercise 1: Basic Journal Writing

Create a program that writes data to a journal and then reads it back.

Exercise 2: Dynamic Data Writing

Write a program that writes different types of data to journals.

Exercise 3: Error Handling

Implement error handling for the WRITE JOURNALNAME command.

Related Concepts

Journal Management

Managing journals in CICS

WAIT JOURNALNAME

Waiting for journals

Task Coordination

Coordinating tasks

Data Writing

Writing data to journals

Error Handling

Handling journal errors