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Execution

The workflow execution system is responsible for running workflows, managing their lifecycle, handling errors, and providing monitoring capabilities.

Execution Engine

The execution engine handles:
  • Workflow instantiation
  • State management
  • Activity execution
  • Error handling
  • Compensation

Execution Flow

State Management

1. Workflow State

Track workflow execution:

2. Activity State

Monitor individual activities:

Monitoring

1. Real-time Monitoring

Track active workflows:

2. Metrics

Collect performance metrics:

3. Logging

Comprehensive logging:

Error Handling

1. Activity Errors

Handle activity failures:

2. Workflow Errors

Handle workflow failures:

Compensation

1. Compensation Strategy

Define how to handle failures:

2. Compensation Activities

Define reversal activities:

Performance

1. Concurrency

Manage parallel execution:

2. Resource Management

Control resource usage:

Best Practices

1. Execution Design

  • Plan for failures
  • Implement proper logging
  • Monitor performance
  • Handle timeouts
  • Manage resources

2. Error Recovery

  • Implement retry logic
  • Define compensation activities
  • Handle partial failures
  • Maintain consistency
  • Notify stakeholders

3. Monitoring

  • Set up alerts
  • Track metrics
  • Analyze patterns
  • Monitor resources
  • Log important events

Common Patterns

1. Saga Pattern

Handle distributed transactions:

2. Circuit Breaker

Prevent cascading failures:

3. Bulkhead

Isolate failures:

Debugging

1. Execution Tracing

Track workflow execution:

2. Debugging Tools

Available debugging features:
  • Step-by-step execution
  • State inspection
  • Variable watching
  • Activity replay
  • Log analysis

Next Steps

Return to Overview to review the complete workflow system architecture.