A good architecture is one that meets the needs of the stakeholders (especially the users) to their satisfaction, does not violate established principles of system architecture, and takes into account the relevant ilities by allowing for maintenance, evolution, further development, embedding, etc. as the customer requires.
Really good architectures are also elegant (intellectually clean of unnecessary complexities or ‘exceptions’), can direct a builder to cost-effective structures that can be completed within a reasonable time frame, conceptually pleasing to all stakeholders (especially the user), and provide some special advantage (such as a competitive advantage) or utility to the customer.
Described here is a list of common technical architectures that can be adopted in the system design phase:
|Client/Server||Segregates the system into two applications, where the client makes requests to the server. In many cases, the server is a database with application logic represented as stored procedures.|
|Component-Based Architecture||Decomposes application design into reusable functional or logical components that expose well-defined communication interfaces.|
|Domain Driven Design||An object-oriented architectural style focused on modeling a business domain and defining business objects based on entities within the business domain.|
|Layered Architecture||Partitions the concerns of the application into stacked groups (layers).|
|Message Bus||An architecture style that prescribes use of a software system that can receive and send messages using one or more communication channels, so that applications can interact without needing to know specific details about each other.|
|N-Tier / 3-Tier||Segregates functionality into separate segments in much the same way as the layered style, but with each segment being a tier located on a physically separate computer.|
|Object-Oriented||A design paradigm based on division of responsibilities for an application or system into individual reusable and self-sufficient objects, each containing the data and the behavior relevant to the object.|
|Service-Oriented Architecture (SOA)||Refers to applications that expose and consume functionality as a service using contracts and messages.|
|Microservices Architecture (Single Page Apps)||Refers to applications that expose and consume functionality as a service using contracts and messages.|
- Chapter 1: What is Software Architecture?
- Chapter 2: Key Principles of Software Architecture
- Chapter 3: Architectural Patterns and Styles
- Chapter 4: A Technique for Architecture and Design
- Chapter 1 Introduction Java Enterprise
- Chapter 2: Java Enterprise System Architecture
- Chapter 3: System-Level Features
- Chapter 4 Life-Cycle Concepts
- Java EE 6 Tutorial – Distributed Multitiered Applications