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CICS ROUTE - Route

CICS ROUTE provides route management capabilities, enabling route processing and output processing in CICS environments. It provides efficient route capabilities for CICS applications.

What is CICS ROUTE?

CICS ROUTE provides route management capabilities, enabling route processing and output processing. It provides efficient route capabilities, allowing applications to manage route operations.

Command Syntax

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EXEC CICS ROUTE
    [RESP(response-code)]
    [RESP2(response-code-2)]
END-EXEC.

Parameters Explained

RESP Parameters

Response codes returned by the command:

  • RESP: Primary response code - indicates the success or failure of the route operation
  • RESP2: Secondary response code - provides additional error information when RESP indicates failure
  • Always check these codes for command success before proceeding with data processing
  • Handle command failures appropriately to prevent application errors

Route Types

1. Basic Routes

  • Basic routes: Standard route operations that handle simple routing without special formatting
  • Mapped routes: Route operations that use predefined field mappings to structure route data
  • Unmapped routes: Raw route operations that handle unstructured routing without predefined field mappings
  • Custom routes: Specialized route operations designed for specific application requirements

2. Advanced Routes

  • Advanced routes: Complex route operations that handle sophisticated routing processing and validation
  • Secure routes: Route operations that include encryption and security features for sensitive routing
  • Encrypted routes: Route operations that automatically encrypt route data
  • Compressed routes: Route operations that handle compressed routing streams and automatically compress route data

3. Specialized Routes

  • Specialized routes: Route operations tailored for specific protocols or communication methods
  • High-performance routes: Optimized route operations designed for maximum throughput and efficiency
  • Low-latency routes: Route operations optimized for minimal delay and real-time processing requirements
  • High-throughput routes: Route operations designed to handle large volumes of routing efficiently

Implementation Example

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WORKING-STORAGE SECTION.
01 WS-RESPONSE            PIC S9(8) COMP.
01 WS-RESPONSE2           PIC S9(8) COMP.
 
PROCEDURE DIVISION.
    * Route operation
    EXEC CICS ROUTE
        RESP(WS-RESPONSE)
        RESP2(WS-RESPONSE2)
    END-EXEC.
    
    IF WS-RESPONSE NOT EQUAL DFHRESP(NORMAL)
        EXEC CICS WRITE OPERATOR
            TEXT('ROUTE command failed')
        END-EXEC
        EXEC CICS RETURN END-EXEC
    END-IF.
    
    * Route operation completed successfully
    * Continue processing

Route Processing

1. Route Preparation

Route preparation includes:

  • Route validation - ensuring the route operation is properly configured and authorized
  • Route formatting - preparing data structures and buffers for route data
  • Route encoding - setting up proper character encoding and data transformation
  • Route processing - initializing the route operation and preparing for routing

2. Route Transmission

Route transmission includes:

  • Route routing - directing route data to the appropriate processing location
  • Route delivery - ensuring route data reaches the correct destination within the application
  • Transmission confirmation - verifying that route was completed successfully
  • Error handling - managing transmission failures and implementing retry mechanisms

3. Output Management

Output management includes:

  • User management - handling user sessions and maintaining connection state
  • Output formatting - structuring route data for presentation or further processing
  • User experience - ensuring smooth data flow and responsive application behavior
  • Performance optimization - maximizing route efficiency and minimizing resource usage

Common Response Codes

Success Response Codes

  • NORMAL (0): Route operation completed successfully - routing was completed without errors
  • ROUTE (4): Route operation completed - operation completed with route-specific status

Error Response Codes

  • INVREQ (16): Invalid request - the route operation parameters are incorrect or unauthorized
  • NOTFND (20): Resource not found - the specified route resource does not exist
  • LENGERR (22): Length error - the route data length exceeds expected limits
  • ROUTE (24): Route error - a route-specific error occurred during the operation

Best Practices

1. Route Preparation

  • Prepare route appropriately - ensure all necessary resources and configurations are in place
  • Validate route content - verify that route data meets expected format and quality standards
  • Handle different route types - implement flexible processing to accommodate various routing formats
  • Ensure route integrity - maintain data consistency and prevent corruption during routing

2. Error Handling

  • Check all response codes - always examine both RESP and RESP2 for complete error information
  • Handle route failures - implement appropriate recovery mechanisms for failed route operations
  • Implement retry logic - provide automatic retry capabilities for transient failures
  • Log error conditions - maintain detailed logs for troubleshooting and monitoring purposes

3. Performance Optimization

  • Minimize route operations - reduce unnecessary route calls to improve overall performance
  • Use efficient route formats - choose appropriate data formats to minimize processing overhead
  • Optimize user updates - streamline user interface updates to reduce response time
  • Manage user resources - efficiently allocate and manage system resources for route operations

Explain It Like I'm 5 Years Old

Imagine you're giving directions to someone:

When you want to give directions to someone, you tell them which way to go. If you give them directions, they know which way to go. If you don't give them directions, they don't know which way to go.

CICS ROUTE is like giving directions to someone. The computer program tells data which way to go. If it gives data directions, the data knows which way to go. If it doesn't give data directions, the data doesn't know which way to go.

Just like you give directions to people, the computer program gives directions to data!

Exercises

Exercise 1: Route Operation

Write a CICS ROUTE command to perform a route operation.

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EXEC CICS ROUTE
    RESP(WS-RESPONSE)
    RESP2(WS-RESPONSE2)
END-EXEC.

Exercise 2: Route Processing

How would you implement comprehensive route processing that handles different route types and requirements?

Answer: Identify different route types and appropriate handling, implement route validation and encoding, handle different route types and capabilities, implement proper error handling for route failures, optimize route operations for performance, and maintain route integrity throughout the process.

Quiz

Question 1

What is the primary purpose of CICS ROUTE?

Answer: B) To provide route management capabilities

Question 2

Which parameter specifies the response code?

Answer: A) RESP

Related Concepts

CICS Route Processing

Route processing and output in CICS

CICS User Management

User management and user interaction in CICS

CICS Output Processing

Output processing and route display in CICS