A Domain-Specific Language (DSL) is a computer language specialized to a particular application domain. Unlike General-Purpose Languages (GPLs) like Java or Python, DSLs focus on solving problems in a specific area, offering a more concise and expressive way to represent solutions. By using terminology and constructs …

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The Reactor pattern decouples event handling from the actual event sources. An event loop (“reactor”) monitors multiple event sources (like network sockets, timers, or user input) and dispatches events to associated handler functions when they occur. This allows for concurrent handling of multiple events within a …

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Infrastructure as Code (IaC) is the practice of managing and provisioning infrastructure through code, rather than through manual processes. This means that infrastructure – servers, virtual machines, networks, load balancers, databases, etc. – is treated as code, stored in version control, and automated through …

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The Backend for Frontend (BFF) pattern addresses the complexities of building client applications that consume multiple backend services, particularly in microservice architectures. It involves creating a separate backend layer specifically tailored to the needs of each client type (e.g., web, mobile, smartwatch). …

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The Command pattern encapsulates a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations. Essentially, it decouples the object that originates the request from the object that knows how to perform it.

This pattern promotes loose …

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The Interpreter pattern defines a grammatical representation for a language along with an interpreter that uses this representation to interpret sentences in the language. Essentially, it allows you to build an interpreter for a simple language without resorting to parsing. It promotes handling requests that are …

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The Message Channel pattern provides a way for components of a system to communicate with each other without direct references. It introduces an intermediary channel through which messages are sent and received, decoupling the sender (client) and receiver (server). This is particularly useful in concurrent or …

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Self-Contained Systems is an architectural pattern where an application is structured as a suite of independently deployable services, each with its own database and logic. These systems are designed to be loosely coupled, communicating with each other via well-defined APIs, but without sharing databases or internal …

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The Service Locator pattern provides a centralized registry for obtaining services. Instead of a component directly creating or finding its dependencies, it asks the Service Locator for them. This enhances decoupling by hiding the implementation details of the services from the clients that use them. The Locator is …

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The Template Method pattern defines the skeleton of an algorithm in a method, deferring some steps to subclasses. It allows one of the algorithm’s steps to be overridden by a subclass without changing the algorithm’s structure. This promotes code reuse and reduces redundancy by centralizing common logic …

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