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