saga-orchestrationlisted

# Saga Orchestration Patterns for managing distributed transactions and long-running business processes. ## When to Use This Skill - Coordinating multi-service transactions - Implementing compensating transactions - Managing long-running business workflows - Handling failures in distributed systems - Building order fulfillment processes - Implementing approval workflows ## Core Concepts ### 1. Saga Types ``` Choreography Orchestration ┌─────┐ ┌─────┐ ┌─────┐ ┌─────────────┐ │Svc A│─►│Svc B│─►│Svc C│ │ Orchestrator│ └─────┘ └─────┘ └─────┘ └──────┬──────┘ │ │ │ │ ▼ ▼ ▼ ┌─────┼─────┐ Event Event Event ▼ ▼ ▼ ┌────┐┌────┐┌────┐ │Svc1││Svc2││Svc3│ └────┘└────┘└────┘ ``` ### 2. Saga Execution States | State | Description | |-------|-------------| | **Started** | Saga initiated | | **Pending** | Waiting for step completion | | **Compensating** | Rolling back due to failure | | **Completed** | All steps succeeded | | **Failed** | Saga failed after compensation | ## Templates ### Template 1: Saga Orchestrator Base ```python from abc import ABC, abstractmethod from dataclasses import dataclass, field from enum import Enum from typing import List, Dict, Any, Optional from datetime import datetime import uuid class SagaState(Enum): STARTED = "started" PENDING = "pending"