Microservices for Beginners: Simple and Practical

Explore the essentials of microservices and monolithic architecture, comparing scalability, agility, and maintenance through a three-layer monolith and autonomous services communicating via APIs.

This lecture shows how microservices enable specialization and independent operation in a Techville pizzeria. Lucy, Tony, Carla, Bruno, and Sam coordinate a large corporate order to demonstrate efficiency and innovation.

Explore vertical and horizontal scaling in microservices, upgrading one machine versus adding many, weighing simplicity and cost against fault tolerance, load handling, and required load balancing and orchestration.

Explore eventual consistency in microservices, with asynchronous updates, data convergence, and failure tolerance, illustrated by a pizzeria order-to-delivery workflow with notifications.

Explore microservices in e-commerce: user, product, order, cart, and payment services, API gateway routing, token authentication, and the ordered created event.

Learn key microservices characteristics—decomposition, single responsibility, independent deployment with own data stores and technology diversity, plus components like service discovery, restful APIs, and API gateway routing.

Explore microservices communication concepts, from HTTP REST calls to gRPC, message queues, and event-driven patterns, with service discovery and API gateways ensuring coordinated, resilient interactions.

Watch a microservices workflow unfold, where each room is an independent microservice with its own API, connected by hallways and monitored for health, security, and scale in Tocqueville.

Explore the microservices workflow and deployment with Docker and Kubernetes, applying best practices like service discovery, API gateway, and ci cd pipelines, plus centralized logging and monitoring.

Compare microservices and monolithic architectures, highlighting a unified code base versus separate services with own databases, and address challenges like complexity, data consistency, and command query responsibility segregation in communication.

Follow a practical, story-driven guide to implementing microservices with ASP.NET Core. Explore independent databases, domain driven design, rest, RabbitMQ, service registry, API gateway, circuit breaker, retry policies, and distributed tracing.

Explore a microservice ecosystem by contrasting the main solution as an orchestrator routing shared services, with independently deployable microservices each with its own domain logic, APIs, and databases.

Explore how domain-driven design and microservices create scalable, resilient systems using ubiquitous language, bounded contexts, aggregates, and domain events with event-driven integration patterns and Kafka or RabbitMQ.

Explore domain-driven design entities with distinct identity and life cycles, such as an order with an order id that adds items and calculates totals, while order items are value objects.

Explore value objects in domain-driven design by examining immutability, state-based equality, and encapsulation of business rules through a money value object that supports addition and comparison within the same currency.

Explore domain-driven design aggregates, including aggregate roots and bounded contexts, and learn how the order aggregate enforces business rules across create order, add item to order, and change shipping address.

Explore bounded contexts in domain-driven design, dividing a large domain into cohesive parts with separate projects, each with its own domain model, entities, value objects, domain services, and ubiquitous language.

Explore domain events in domain-driven design and how changes become objects that services subscribe to, as in an e-commerce example where an order placed event triggers updates across processes.

Explore domain-driven design by modeling an event as an entity and aggregate root with a location value object, supported by a repository, pricing service, and domain events.

Balance traffic across multiple service instances to improve scalability and reliability in microservices, using round robin, least connections, IP hashing, and weighted load balancing with hardware, software, or cloud balancers.

Ada Lawless introduces microservices and a load balancer named Balto to split tasks and evenly distribute requests, dramatically boosting bistro efficiency, speeding orders, and increasing customer satisfaction.

Explore how the saga pattern coordinates distributed transactions across microservices, using compensating actions to maintain consistency, handle failures, and ensure reliable order fulfillment from inventory to delivery.

Learn the circuit breaker pattern, a safety switch for microservices that prevents cascading failures by moving between closed, open, and half-open states with timeouts and recovery checks in distributed systems.

Master the two-phase commit pattern (2pc) to ensure atomicity and data consistency across microservices, where the coordinator orchestrates prepare and commit phases.

Explore how the decorator pattern enhances microservices by wrapping a core component with concrete decorators for logging, caching, and security checks, enabling cross-cutting concerns without altering core logic.

Learn how the backend for frontend (bff) pattern tailors apps for different devices with two specialized assistants—the in-person and online customers—ensuring fast, device-appropriate data and features.

Microservices and event-driven architecture work together to enable loose coupling, scalability, and asynchronous communication through producers, consumers, and an event broker such as Kafka, RabbitMQ, AWS SNS, and SQS.

Learn to implement event-driven architecture in ASP.NET Core by defining events, publishing them, and handling with decoupled event handlers. Explore in-memory and broker-based messaging with MassTransit for scalable, maintainable apps.

Explore how microservices and event sourcing enable decoupling and scalability by managing state as immutable events, replayable through an event store for auditing, debugging, and robust distributed systems.