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CICS CONVERTTIME - Time Conversion

CICS CONVERTTIME provides time conversion capabilities for programs and transactions. It enables programs to convert time formats, handle date/time conversions, and manage time formatting in CICS environments.

What is CICS CONVERTTIME?

CICS CONVERTTIME is a command that allows programs to convert time formats between different representations. It provides time conversion capabilities, date/time formatting, and time management for CICS applications.

Command Syntax

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EXEC CICS CONVERTTIME
    FROMTIME(input-time)
    TOTIME(output-time)
    [FROMFORMAT(input-format)]
    [TOFORMAT(output-format)]
    [RESP(response-code)]
END-EXEC

Parameters

Required Parameters

  • FROMTIME(input-time) - Input time to convert
  • TOTIME(output-time) - Output time variable

Optional Parameters

  • FROMFORMAT(input-format) - Input time format
  • TOFORMAT(output-format) - Output time format
  • RESP(response-code) - Response code variable

Time Formats

Standard Formats

Standard time formats

  • • YYYYMMDD - Year Month Day format
  • • HHMMSS - Hour Minute Second format
  • • YYYYMMDDHHMMSS - Combined date/time format
  • • YYYY-DD-MM - ISO date format

Custom Formats

Custom time formats

  • • MM/DD/YYYY - US date format
  • • DD/MM/YYYY - European date format
  • • HH:MM:SS - Time with separators
  • • YYYY-MM-DD HH:MM:SS - ISO datetime format

Timestamp Formats

Timestamp formats

  • • UNIX TIMESTAMP - Unix timestamp format
  • • JULIAN DATE - Julian date format
  • • EPOCH TIME - Epoch time format
  • • UTC TIME - UTC time format

Display Formats

Display time formats

  • • READABLE DATE - Human readable date
  • • READABLE TIME - Human readable time
  • • READABLE DATETIME - Human readable datetime
  • • LOCALIZED FORMAT - Localized format

Programming Examples

Basic Time Conversion

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CONVERTTIME01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  INPUT-TIME PIC X(14) VALUE '20231225143000'.
       01  OUTPUT-TIME PIC X(19).
       01  INPUT-FORMAT PIC X(14) VALUE 'YYYYMMDDHHMMSS'.
       01  OUTPUT-FORMAT PIC X(19) VALUE 'YYYY-MM-DD HH:MM:SS'.
       01  RESPONSE-CODE PIC S9(8) COMP.
       
       PROCEDURE DIVISION.
           DISPLAY 'Converting time format'
           DISPLAY 'Input: ' INPUT-TIME
           
           EXEC CICS CONVERTTIME
               FROMTIME(INPUT-TIME)
               TOTIME(OUTPUT-TIME)
               FROMFORMAT(INPUT-FORMAT)
               TOFORMAT(OUTPUT-FORMAT)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           IF RESPONSE-CODE = DFHRESP(NORMAL)
               DISPLAY 'Conversion successful'
               DISPLAY 'Output: ' OUTPUT-TIME
           ELSE
               DISPLAY 'Conversion failed'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Time Conversion

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CONVERTTIME02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  INPUT-TIME PIC X(14).
       01  OUTPUT-TIME PIC X(19).
       01  INPUT-FORMAT PIC X(14).
       01  OUTPUT-FORMAT PIC X(19).
       01  RESPONSE-CODE PIC S9(8) COMP.
       01  CONVERSION-COUNT PIC S9(2) COMP VALUE 0.
       01  MAX-CONVERSIONS PIC S9(2) COMP VALUE 3.
       01  TIME-LIST.
           05  TIME-ITEM OCCURS 3 TIMES.
               10  TIME-INPUT PIC X(14).
               10  TIME-OUTPUT PIC X(19).
               10  TIME-INPUT-FMT PIC X(14).
               10  TIME-OUTPUT-FMT PIC X(19).
       
       PROCEDURE DIVISION.
           PERFORM INITIALIZE-TIMES
           PERFORM CONDUCT-MULTIPLE-CONVERSIONS
           
           EXEC CICS RETURN END-EXEC.
       
       INITIALIZE-TIMES.
           MOVE '20231225143000' TO TIME-INPUT(1)
           MOVE 'YYYY-MM-DD HH:MM:SS' TO TIME-OUTPUT-FMT(1)
           MOVE 'YYYYMMDDHHMMSS' TO TIME-INPUT-FMT(1)
           
           MOVE '20231225' TO TIME-INPUT(2)
           MOVE 'YYYY-MM-DD' TO TIME-OUTPUT-FMT(2)
           MOVE 'YYYYMMDD' TO TIME-INPUT-FMT(2)
           
           MOVE '143000' TO TIME-INPUT(3)
           MOVE 'HH:MM:SS' TO TIME-OUTPUT-FMT(3)
           MOVE 'HHMMSS' TO TIME-INPUT-FMT(3).
       
       CONDUCT-MULTIPLE-CONVERSIONS.
           PERFORM VARYING CONVERSION-COUNT FROM 1 BY 1
               UNTIL CONVERSION-COUNT > MAX-CONVERSIONS
               
               MOVE TIME-INPUT(CONVERSION-COUNT) TO INPUT-TIME
               MOVE TIME-INPUT-FMT(CONVERSION-COUNT) TO INPUT-FORMAT
               MOVE TIME-OUTPUT-FMT(CONVERSION-COUNT) TO OUTPUT-FORMAT
               
               PERFORM CONDUCT-SINGLE-CONVERSION
               
               IF RESPONSE-CODE = DFHRESP(NORMAL)
                   MOVE OUTPUT-TIME TO TIME-OUTPUT(CONVERSION-COUNT)
                   DISPLAY 'Conversion ' CONVERSION-COUNT ' successful'
                   DISPLAY 'Output: ' TIME-OUTPUT(CONVERSION-COUNT)
               ELSE
                   DISPLAY 'Conversion ' CONVERSION-COUNT ' failed'
               END-IF
           END-PERFORM.
       
       CONDUCT-SINGLE-CONVERSION.
           EXEC CICS CONVERTTIME
               FROMTIME(INPUT-TIME)
               TOTIME(OUTPUT-TIME)
               FROMFORMAT(INPUT-FORMAT)
               TOFORMAT(OUTPUT-FORMAT)
               RESP(RESPONSE-CODE)
           END-EXEC.

Error Handling with Time Conversion

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. CONVERTTIME03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  INPUT-TIME PIC X(14) VALUE '20231225143000'.
       01  OUTPUT-TIME PIC X(19).
       01  INPUT-FORMAT PIC X(14) VALUE 'YYYYMMDDHHMMSS'.
       01  OUTPUT-FORMAT PIC X(19) VALUE 'YYYY-MM-DD HH:MM:SS'.
       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  CONVERSION-SUCCESSFUL PIC X(1) VALUE 'N'.
       
       PROCEDURE DIVISION.
           PERFORM CONDUCT-TIME-CONVERSION-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       CONDUCT-TIME-CONVERSION-WITH-RETRY.
           PERFORM CONDUCT-TIME-CONVERSION
           
           IF RESPONSE-CODE NOT = DFHRESP(NORMAL)
               AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retry ' RETRY-COUNT ' time conversion'
               PERFORM CONDUCT-TIME-CONVERSION-WITH-RETRY
           END-IF.
       
       CONDUCT-TIME-CONVERSION.
           EXEC CICS CONVERTTIME
               FROMTIME(INPUT-TIME)
               TOTIME(OUTPUT-TIME)
               FROMFORMAT(INPUT-FORMAT)
               TOFORMAT(OUTPUT-FORMAT)
               RESP(RESPONSE-CODE)
           END-EXEC
           
           EVALUATE RESPONSE-CODE
               WHEN DFHRESP(NORMAL)
                   MOVE 'Y' TO CONVERSION-SUCCESSFUL
                   DISPLAY 'Time conversion successful'
               WHEN DFHRESP(NOTAUTH)
                   DISPLAY 'Not authorized for time conversion'
               WHEN DFHRESP(INVREQ)
                   DISPLAY 'Invalid time conversion request'
               WHEN DFHRESP(TIMEERR)
                   DISPLAY 'Time conversion error'
               WHEN DFHRESP(FORMATERR)
                   DISPLAY 'Time format error'
               WHEN DFHRESP(INVALIDTIME)
                   DISPLAY 'Invalid time value'
               WHEN OTHER
                   DISPLAY 'Unexpected time conversion error'
           END-EVALUATE.

Time Management

Time Conversion

  • • Format Conversion - Convert between time formats
  • • Timezone Conversion - Convert between timezones
  • • Calendar Conversion - Convert between calendars
  • • Precision Conversion - Convert time precision

Time Validation

  • • Time Validation - Validate time values
  • • Format Validation - Validate time formats
  • • Range Validation - Validate time ranges
  • • Consistency Validation - Validate time consistency

Time Processing

  • • Time Parsing - Parse time values
  • • Time Formatting - Format time values
  • • Time Calculation - Calculate time differences
  • • Time Manipulation - Manipulate time values

Error Recovery

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

Error Handling

Common Response Codes

  • DFHRESP(NORMAL) - Time conversion successful
  • DFHRESP(NOTAUTH) - Not authorized for time conversion
  • DFHRESP(INVREQ) - Invalid time conversion request
  • DFHRESP(TIMEERR) - Time conversion error
  • DFHRESP(FORMATERR) - Time format error
  • DFHRESP(INVALIDTIME) - Invalid time value

Performance Considerations

Time Efficiency

  • • Optimize time operations - Use efficient time handling
  • • Minimize time overhead - Reduce time processing overhead
  • • Use time caching - Implement time caching
  • • Monitor time frequency - Track time conversion patterns

System Impact

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

Best Practices

Time Conversion Best Practices

  • • Use appropriate time formats for your needs
  • • Implement proper error handling for time operations
  • • Validate time values before conversion
  • • Use appropriate time management techniques
  • • Monitor time conversion activities and performance
  • • Maintain time audit trails
  • • Handle time errors gracefully

Explain It Like I'm 5 Years Old

Think of CICS CONVERTTIME like changing the way you write the time:

  • • Different Ways: "There are different ways to write time" - Different formats
  • • Change Format: "Change from one way to another" - Convert formats
  • • Same Time: "It's the same time, just written differently" - Same value, different format
  • • Choose Format: "Choose the format you want" - Select output format
  • • Get New Time: "Get the time in the new format" - Receive converted time

Exercises

Exercise 1: Basic Time Conversion

Create a program that converts time between different formats.

Exercise 2: Advanced Time Management

Write a program that manages multiple time conversion operations.

Exercise 3: Error Handling

Implement comprehensive error handling for time conversion failures.

Related Concepts

Time Management

Managing time operations

Date/Time Processing

Processing dates and times

Time Formatting

Formatting time values

Timezone Handling

Handling timezones

Error Handling

Managing time errors