Complete Application Examples

This file contains the complete end-to-end application examples that were in the original index.md.

For the full implementations, see the original index.md file (now archived as reference material).

Available Examples

1. Event-Driven Microservice

Complete microservice integrating Producer, Consumer, and Admin APIs.

Location: See original index.md lines 1678-1960

Features:

• Multi-API integration (Producer + Consumer + Admin)
• Automatic topic management
• Error handling with DLQ
• Health metrics collection
• Graceful shutdown patterns

2. Multi-Topic Aggregator

Stateful aggregation across multiple topics.

Location: See original index.md lines 1963-2123

Features:

• Multiple topic consumption
• Stateful aggregation
• External state checkpointing
• Rebalance handling

3. Configuration Validator

Utility for validating Kafka configurations.

Location: See original index.md lines 2126-2343

Features:

• Producer/Consumer validation
• Interdependency checking
• Detailed error messages

4. Exactly-Once Processor

Consume-transform-produce with exactly-once semantics.

Location: See original index.md lines 2347-2418

Features:

• Transactional processing
• Offset management
• Error handling

5. Dead Letter Queue Processor

DLQ pattern with configurable retry.

Location: See original index.md lines 2422-2561

Features:

• Retry logic
• Error metadata
• DLQ routing

Accessing Full Code

The complete code for all examples is preserved in the original index.md file. To access:

1. Read the original comprehensive index.md (2,563 lines)
2. Navigate to the line numbers indicated above
3. Extract the complete implementation

Alternatively, see real-world-scenarios.md for summaries and usage guidance.