Implement handleSendToJob function with deduplication support

[Copilot]

Overview

This PR implements the handleSendToJob function with robust deduplication capabilities to prevent duplicate jobs from being processed in the job queue system.

Implementation Details

The solution uses an in-memory Set data structure to track processed job IDs, providing O(1) lookup performance for duplicate detection. The implementation includes:

Core Functionality

• Deduplication: Tracks processed job IDs and prevents duplicate submissions
• Input Validation: Validates job objects, ensures job IDs are present, and verifies send functions
• Error Handling: Comprehensive error handling with descriptive messages for all failure scenarios
• Utility Functions: Helper methods to check job status, count processed jobs, and clear the cache

API

const { handleSendToJob } = require('./jobHandler');

// Send a job with automatic deduplication
const result = handleSendToJob(
  { id: 'job123', data: { task: 'process-data' } },
  sendToQueue
);

// First attempt: { success: true, status: 'sent', ... }
// Second attempt with same ID: { success: false, status: 'duplicate', ... }

The function returns a structured response object containing:

• success: Boolean indicating if the operation succeeded
• status: One of 'sent', 'duplicate', or 'error'
• message: Human-readable description of the result
• jobId: The job identifier
• result or error: Additional context based on the outcome

Files Added

• jobHandler.js - Core module with deduplication logic
• test.js - Comprehensive test suite (29 tests, all passing)
• example.js - Usage examples and patterns
• demo.js - Visual demonstration of deduplication in action
• package.json - Project configuration
• .gitignore - Standard Node.js ignore patterns

Testing

All tests pass successfully:

• ✅ 29/29 tests passing
• Covers valid jobs, duplicate detection, error scenarios, and edge cases
• Batch processing scenarios validated

Security

• CodeQL analysis completed: 0 vulnerabilities
• No security issues detected

Documentation

Complete documentation provided in the updated README including:

• Feature overview
• Installation and usage instructions
• API reference with examples
• Implementation notes about the in-memory deduplication approach
• Error handling guide

Notes

The deduplication cache is stored in memory and will be cleared when the process restarts. For persistent deduplication across application restarts, consider integrating with an external cache system (e.g., Redis) in future iterations.

Original prompt

Refine the function handleSendToJob to dedup

Conversation Summary

TITLE

Refine handleSendToJob Function to Implement Deduplication

USER INTENT

The user wants to improve the handleSendToJob function by adding deduplication logic to prevent duplicate entries or processing.

TASK DESCRIPTION

Modify the handleSendToJob function to include deduplication capabilities. This likely involves checking for existing entries before processing or sending data to a job queue/processor to avoid redundant operations.

EXISTING

• A function named handleSendToJob exists and is currently operational
• The function likely handles sending data or tasks to a job processing system

PENDING

• Implement deduplication logic in the handleSendToJob function
• Determine the deduplication strategy (e.g., by ID, timestamp, content hash, or other unique identifier)
• Add checks to identify duplicate entries before processing
• Handle cases where duplicates are detected (skip, log, or return appropriate status)

CODE STATE

No specific files or code snippets were provided in the conversation. The current state of the handleSendToJob function is unknown.

RELEVANT CODE/DOCUMENTATION SNIPPETS

None provided in the conversation.

OTHER NOTES

• The conversation is extremely brief, containing only the user's request without additional context
• The specific deduplication criteria and implementation approach need to be clarified
• The file path containing handleSendToJob was not specified
• The type of job system being used (queue, processor, API, etc.) is unknown
• Error handling strategy for duplicates needs to be defined

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