<aside> 📚 📁 Category: Microservices

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Overview

Circuit Breaker prevents cascading failures by stopping requests to failing services. It monitors failures and temporarily blocks requests, allowing services to recover.

<aside> ℹ️ Why It Matters: Understanding Circuit Breaker is essential for building robust, scalable, and secure modern applications.

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Key Concepts

• [x] Closed State - Normal operation
• [x] Open State - Blocking requests
• [x] Half-Open State - Testing recovery
• [x] Failure Threshold - Trip circuit
• [x] Timeout Configuration - Request limits
• [x] Fallback Responses - Alternative data
• [x] Automatic State Transitions - Self-healing
• [x] Monitoring and Metrics - Track failures

Common Use Cases

<aside> 💡 Where to Apply Circuit Breaker

                        Microservices communication
                        External API calls
                        Database connections
                        Third-party services
                        Distributed systems
                        Cloud services

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Best Practices

• [x] Configure appropriate thresholds
• [x] Implement meaningful fallbacks
• [x] Monitor circuit state
• [x] Use Polly or Resilience4j