Pattern-Oriented Software Architecture 1 (POSA1)

(by Frank Buschmann, Regine Meunier, Hans Rohnert, Peter Sommerlad, Michael Stal (Wiley, 1996, ISBN 0-471-95869-7) )

Whole-Part (225) helps with the aggregation of components that together form a semantic unit

Master-Slave (245) supports fault tolerance, parallel computation and computational accuracy. A master component distributes work to identical slave components and computes a final result from the results those slaves return

Proxy (263) makes the clients of a component communicate with a representative rather than to the component itself. Introducing such a placeholder can yield enhanced efficiency, easier access, and protection from unauthorized access

Command Processor (277) separates the request for a service from its execution, and provides additional services such as the storing of request objects for later undo
View Handler (291) helps to manage all views that a software system provides, coordinates dependencies between views, and organizes their update
Counted Pointer (353) idiom makes memory management of dynamically-allocated shared objects in C++ easier

Forwarder-Receiver (307) provides transparent inter-process communication for software systems with a peer-to-peer interaction model. It decouples the peers from the underlying communication mechanisms
Client-Dispatcher-Server (323) introduces an intermediate layer between clients and servers, the dispatcher component. It provides location transparency by means of a name service, and hides the details of the establishment of the communication connection between clients and servers
Publisher-Subscriber (339) helps to keep the state of cooperating components synchronized

Layers (31) helps to structure applications that can be decomposed into groups of subtasks in which each group of subtasks is at a particular level of abstraction
Pipes and Filters (53) provides a structure of systems that process a stream of data
Blackboard (71) is useful for problems for which no deterministic solution strategies are known. Several specialized subsystems assemble their knowledge to build a possibly partial or approximate solution

Broker (99) can be used to structure distributed software systems with decoupled components that interact by remote service transactions

Model-View-Controller (125) divides an interactive application into three components: core functionality, representation, and control. A change-propagation mechanism ensure consistency between the three parts
Presentation-Abstraction-Control (145) defines a structure for interactive software systems in the form of a hierarchy of cooperating agents. Every agent is responsible for a specific aspect of the application's functionality and consists of three components: presentation, abstraction, and control. This subdivision separates the human-computer interaction aspects of the agent from its functional core and its communication with other agents

Microkernel (171) applies to software systems that must be able to adapt to changing system requirements. It separates a minimal functional core from extended functionality and customer-specific parts. The microkernel also serves as a socket for plugging in these extensions and coordinating their collaboration
Reflection (193) provides a mechanism for changing structure and behavior of software systems dynamically. It supports the modification of fundamental aspects, such as type structures and function call mechanisms

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Last modified 07 October 2024