uapf-integration-ready/demo-process/docs/notes.md

Data Synchronization Process - Documentation

Overview

This process implements a data synchronization workflow that fetches data from an external REST API, transforms and validates it, and writes it to a PostgreSQL database.

Process Flow

1. Fetch Data from API - Retrieves customer data from the external REST API endpoint
2. Transform Data - Maps external data fields to internal schema
3. Validate Data - Applies quality rules and validation logic using DMN decisions
4. Write to Database - Persists validated data to the PostgreSQL database

Integration Points

REST API Connector

• Location: ../connectors/rest-api/
• Configuration: See resources/mappings.yaml for endpoint details
• Authentication: Bearer token (configured via API_TOKEN environment variable)
• Endpoints:
  • GET /api/v1/data - Fetch customer records
  • PUT /api/v1/data/{id} - Update customer record

Database Connector

• Location: ../connectors/database/
• Type: PostgreSQL
• Schema: See ../connectors/database/schema.sql
• Tables:
  • customers - Main customer data table
  • sync_log - Synchronization audit trail

Decision Logic (DMN)

The validation decision table (dmn/decisions.dmn.xml) evaluates records based on:

• Record Type: customer, transaction, etc.
• Quality Score: 0-100 numeric quality metric
• Required Fields: Presence of mandatory fields

Validation Outcomes

• VALID (Score ≥ 80) → Process immediately
• WARNING (Score 50-79) → Flag for manual review
• INVALID (Score < 50 or missing required fields) → Reject

Case Management (CMMN)

When synchronization issues occur, a case is created to manage the investigation and resolution:

1. Investigate Issue - Manual task to analyze the problem
2. Check API Status - Automated check of API availability
3. Check Database Status - Automated check of database connectivity
4. Resolve Issue - Manual remediation task
5. Retry Synchronization - Automated retry of failed sync

Configuration

Environment Variables

Required environment variables (see ../config/secrets.example.env):

# API Configuration
API_TOKEN=your-api-bearer-token
API_BASE_URL=https://api.example.com

# Database Configuration
DB_HOST=localhost
DB_PORT=5432
DB_NAME=processgit
DB_USER=sync_user
DB_PASSWORD=secure_password

Data Mapping

Field mappings are defined in resources/mappings.yaml:

External Field	Internal Field	Type
external_id	customerId	string
full_name	customerName	string
contact_email	email	string
created_date	createdAt	datetime

Error Handling

API Failures

• Strategy: Retry with exponential backoff
• Max Retries: 3
• Notification: Alert ops team

Database Failures

• Strategy: Log and continue
• Notification: Alert ops team

Validation Failures

• Strategy: Reject record
• Log Level: Warning

Performance Considerations

• API Timeout: 30 seconds
• Database Connection Pool: 2-10 connections
• Batch Size: Recommended 100 records per sync
• Frequency: Configurable (default: hourly)

Testing

Unit Tests

• Validate data transformation logic
• Test decision table rules
• Verify error handling

Integration Tests

• End-to-end API to database flow
• Connection failure scenarios
• Data validation edge cases

Performance Tests

• Load test with 10,000+ records
• Concurrent sync operations
• Connection pool behavior

Monitoring

Key Metrics

• Sync success rate
• Average processing time per record
• API response times
• Database query performance
• Error rates by type

Alerts

• Sync failure rate > 5%
• API response time > 10s
• Database connection pool exhaustion
• Validation rejection rate > 20%

Troubleshooting

Common Issues

Issue: Sync fails with API timeout

• Cause: API endpoint slow or unavailable
• Resolution: Check API status, increase timeout, contact API provider

Issue: Database write failures

• Cause: Connection pool exhausted or schema mismatch
• Resolution: Check pool configuration, verify schema matches mappings

Issue: High validation rejection rate

• Cause: Data quality issues at source
• Resolution: Review validation rules, contact data provider

Change Log

Version 0.1.0 (Initial Release)

• Implemented basic data sync workflow
• Configured REST API and database connectors
• Added DMN validation rules
• Created CMMN case for issue management
• Documented configuration and operations

Support

For issues or questions:

• Primary Contact: {{.RepoOwner}}@processgit.local
• Integration Team: integration@processgit.local
• On-Call: See metadata/ownership.yaml