In many ways, Patterns of Enterprise Application Architecture by Martin Fowler is far superior to Clean Architecture. Fowler describes the patterns he's observed repeatedly in enterprise applications. He gives a simple example if each pattern, describes how it works, and where to use it. I found Patterns of Enterprise Application Architecture to be very readable and applicable to my systems.
Patterns Of Enterprise Application Architecture Mobi Download Book
Patterns of Enterprise Application Architecture is written in direct response to the stiff challenges that face enterprise application developers. The author, noted object-oriented designer Martin Fowler, noticed that despite changes in technology - from Smalltalk to CORBA to Java to .NET--the same basic design ideas can be adapted and applied to solve common problems. With the help of an expert group of contributors, Martin distills over forty recurring solutions into patterns. The result is an indispensable handbook of solutions that are applicable to any enterprise application platform.
This book is actually two books in one. The first section is a short tutorial on developing enterprise applications, which you can read from start to finish to understand the scope of the book's lessons. The next section, the bulk of the book, is a detailed reference to the patterns themselves. Each pattern provides usage and implementation information, as well as detailed code examples in Java or C#. The entire book is also richly illustrated with UML diagrams to further explain the concepts.
This book takes a deep dive into many common software architecture patterns. Each pattern includes a full explanation of how it works, explains the pattern's benefits and considerations, and describes the circumstances and conditions it was designed to.
You will also find this guide useful if you are a technical decision maker, such as an enterprise architect, who wants an architecture and technology overview before you decide on what approach to select for new and modern distributed applications.
The success of any application or system depends on the architecture pattern you use. By describing the overall characteristics of the architecture, these patterns not only guide designers and developers on how to design components, but also determine the ways in which those components should interact.
This book focuses on the practical aspects of programming in .NET. You will learn about some of the relevant design patterns (and their application) that are most widely used. We start with classic object-oriented programming (OOP) techniques, evaluate parallel programming and concurrency models, enhance implementations by mixing OOP and functional programming, and finally to the reactive programming model where functional programming and OOP are used in synergy to write better code.
Design patterns have always fascinated software developers, yet true knowledge of their applicability and consequences has eluded many. The various solutions that have been created and applied to solve similar problems have been studied over time by experienced developers and architects. A movement slowly began to catalog such time-tested and successful solutions, which served as a blueprint for software design. The applicability of design patterns exhibited maturity (even though over-engineering was a perceived risk) in solution architecture (in terms of stability, consistency, maintainability, and extensibility), and became a core skill for serious developers and architects. In this introduction to patterns and pattern catalogs, the authors wish to provide a detailed illustration of the movement in the software development industry that led to the discovery and consolidation of the various patterns and pattern catalogs. It is equally important to understand the evolution of patterns, idioms, programming languages, and standards that led to standardization of these technology-agnostic blueprints, which form the basis of enterprise application development today. We will cover the following topics in this regard:
The GoF catalog, named after the four creators of the catalog, started the pattern movement. The creators mostly focused on designing and architecting object-oriented software. The ideas of Christopher Alexander were borrowed to the software engineering discipline, and applied to application architecture, concurrency, security, and so on. The GoF divided the catalog into structural, creational, and behavioral patterns. The original book used C++ and Smalltalk to explain the concepts. These patterns have been ported and leveraged in most of the programming languages that exist today.
Martin Fowler, along with some co-authors, published a book entitled Patterns of Enterprise Application Architecture. The book is a treasure trove of patterns, that helps one to structure and organize the design of enterprise applications using .NET and Java. Some of Fowler's pattern has been leveraged in the context of distributed computing by POSA-Volume 4 authors.
The POEAA catalog is a rich source of ideas when it comes to enterprise application software development. Some of these patterns are implemented by frameworks such as Spring (including Spring.NET), Nhibernate/Entity Framework, Windows Communication Foundation (WCF), and Windows Presentation Foundation (WPF). Awareness about the POEAA catalog helps one to reason about the architecture of pretty much everything happening in the .NET platform.
The EIP catalog is a very influential one in transferring knowledge about strategies for asynchronous messaging and point-to-point synchronous communication between applications. The Apache Camel library implements most of the commonly occurring patterns, while doing Enterprise Application Integration (EAI). The authors feel that this catalog is worth studying should one embark on a project that requires information/data flow from one system to another, including mobile device communication with backend services (MBAAS) that involves data synchronization and queuing mechanisms.
This is a catalog that captures design experience in the form of a book entitled Core J2EE Patterns: Best Practices and Design Strategies by Deepak Alur, John Crupi, and Dan Malks. The book and the associated website deals with common solutions that can be leveraged while writing enterprise web applications. Even though conceived for the J2EE platform, the patterns outlined in the catalog can be used in any context where there is a programming model similar to the J2EE platform. Fortunately, the .NET server-side model is very similar to J2EE.
The book entitled Domain-Driven Design by Eric J. Evans, released in the year 2003, is not a book on patterns in itself. The primary goal of the book is to outline a method by which one can create persistent ignorant domain models by leveraging the ubiquitous language used by the stakeholders in a business scenario. The book contains a lot of patterns and idioms for architecture, design, and application integration, in a model-driven manner.
The authors have borrowed ideas from the book, while creating an ontology for realizing a domain-specific language (DSL) on a mobile-based healthcare application. If one is embarking on creating a DSL-based system architecture, this book can be a good starting point for rich domain models based on business archetypes.
Pattern catalogs are available to deal with various concerns of software development, be it design, architecture, security, data, and so on. Most applications, or even frameworks, leverage only a fraction of the patterns listed earlier. Understanding the pattern catalogs and their applicability is a rich source of design ideas for any software developer. A developer should be careful to avoid the malady of so-called pattern diarrhoea.
The pattern movement has revolutionized the way people are developing software. By capturing the wisdom of experts in their respective areas, pattern catalogs can be used for software engineering, library design, and all areas where they are available. The famous GoF pattern book started the whole movement in the year 1994. Some notable catalogs include POSA, POEAA, EIP, J2EE, DDD, and Arlow/Nuestadt. We have also seen how a multi-paradigm language such as C# is well-suited for pattern-based software development, considering the language's evolution in terms of features. We will continue to explore the applicability and consequence of patterns in the following chapters. We will also be looking at the key design principles, and will explain the need for design patterns using an application case study.
Shine Xavier is a core software engineering practitioner with an extreme passion for designing/building software solutions, application frameworks, and accelerators that help maintain productivity, code quality, performance, and security. His areas of interest include functional programming, interpreters, JavaScript library development, visual programming, algorithms, performance engineering, automation, enterprise mobility, IoT and machine learning. He is currently associated with UST Global as a senior architect, where he continues to provide technical leadership in customer engagements, pre-sales, practice development, product development, innovation, and technology adoption. He lives with his wife and three kids in Thiruvananthapuram, Kerala, India.
Proven approaches such as service-oriented and event-driven architectures are joined by newer techniques such as microservices, reactive architectures, DevOps, and stream processing. Many of these patterns are successful by themselves, but as this practical ebook demonstrates, they provide a more holistic and compelling approach when applied together.
The book is intended for a broad readership, including enterprise, domain, and solution architects, lecturers and students, and anyone else interested in understanding the value proposition, responsibilities, outcomes, methods, and practices of architecture functions. It introduces the basic concepts and theories needed to understand the pattern language presented and the patterns it summarizes. 2ff7e9595c
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