Intermediate6 min read
Microservices Decomposition Patterns
Finding service boundaries that hold: decomposing by business capability and subdomain, context mapping patterns, the anti-corruption layer, and the strangler fig migration.
Read tutorialEnterprise Backend · Phase 3
Microservices Architecture
The whole distributed-systems toolkit: decomposing by bounded context, discovery, gateways, resilience, sagas and the outbox pattern, tracing, containers, Kubernetes and service mesh.
Intermediate5 min read
Service Discovery & Registration
Client-side versus server-side discovery, running Eureka properly including self-preservation, Consul as an alternative, and why Kubernetes usually makes a separate registry unnecessary.
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API Gateway with Spring Cloud Gateway
Building an edge gateway: route predicates, the filter catalogue, custom global filters for auth and correlation, Redis rate limiting, and circuit breakers at the edge.
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Inter-Service Communication Patterns
Choosing how services talk: synchronous REST and gRPC versus asynchronous messaging, the coupling each creates, correlation propagation, and graceful degradation.
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Circuit Breakers & Resilience4j
Resilience4j in production: how the circuit breaker state machine works, tuning the sliding window, combining retry and bulkhead correctly, and the decorator order that matters.
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Distributed Tracing & Observability
Distributed tracing that actually helps: spans and trace context, W3C propagation across HTTP and messaging, sampling strategies, and correlating traces with logs and metrics.
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Distributed Transactions & Saga Patterns
Why two-phase commit fails in microservices, choreography versus orchestration sagas, compensating transactions, the transactional outbox, and idempotent consumers.
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Event-Driven Microservices
Designing events that last: domain versus integration events, Avro and schema registry compatibility, event sourcing basics, ordering guarantees and schema evolution.
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Microservices Testing Strategies
A testing strategy for distributed systems: where the pyramid changes shape, consumer-driven contract testing, component tests with Testcontainers, and why end-to-end tests fail you.
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Containerizing Spring Boot with Docker
Building small, fast, secure Spring Boot images: multi-stage builds, BuildKit cache mounts, layered jars, JVM container awareness, distroless bases and vulnerability scanning.
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Kubernetes for Java Microservices
Running Spring Boot on Kubernetes properly: liveness versus readiness probes, JVM memory inside cgroups, resource requests and limits, autoscaling, and zero-downtime rollouts.
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Service Mesh with Istio
What a service mesh moves out of your application: automatic mTLS, VirtualService routing, outlier detection, authorization policies, fault injection and progressive delivery.
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The Microservices Observability Stack
Assembling logs, metrics and traces into something usable: PromQL that answers real questions, the Grafana stack, golden signals, and alerts that mean something.
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Microservices Security Patterns
Securing a distributed system: authentication at the edge, mTLS and workload identity between services, token propagation without over-trust, API keys and secret management.
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Spring Cloud Config & Centralised Configuration
Centralised configuration done safely: Config Server with a Git backend, client bootstrap and fail-fast, @RefreshScope, encrypted values, and when Kubernetes ConfigMaps are enough.
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