présente les styles architecturaux et les patterns architecturaux dans de façon claire et concis.vous y trouverez la différence explicitement présenté entre style et pattern architectural
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This document discusses web application architecture and design patterns. It describes a three-layer architecture with presentation, application, and data layers. For the presentation layer, forms are commonly used to structure user interfaces. The application layer focuses on business processes and components. The data access layer exposes database data. Popular design patterns like MVC, PAC, and others are explained as ways to achieve separation of concerns and improve maintainability. MVC divides the presentation layer into separate controller and view components. PAC defines a hierarchical structure of cooperating agents with presentation, abstraction, and control components.
discussions about different types of architectures used in web applications, pros and cons of each architecture. MVC design patters and comparison with 3-tier.
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In this fourth presentation on domain-driven design, we present the architectural patterns that are most commonly used (layered architecture, hexagonal architecture and CQRS), describing their characteristics and suggesting when and how to use them
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Topic1 Understanding Distributed Information Systemssanjoysanyal
This document discusses the evolution of distributed information system architectures from one-tier to multi-tier systems. It describes how early systems had all layers merged, while two-tier client-server architectures separated the presentation layer on clients. Three-tier systems then introduced middleware to better integrate between servers. Modern n-tier architectures support complex systems and internet connectivity, with layers distributed across networks and devices.
The document discusses object-oriented design and its role in software development. It describes how design builds upon analysis to provide implementation details. Key aspects of object-oriented design include defining a multilayered architecture, specifying subsystems and components, describing classes and objects, and defining communication mechanisms. The input to design comes from artifacts created in analysis like use cases and class models. The output of design serves as a blueprint to guide construction.
Pattern oriented architecture for web based architectureshuchi tripathi
This document discusses web application architecture and design patterns. It describes a three-layer architecture with presentation, application, and data layers. For the presentation layer, forms are commonly used to structure user interfaces. The application layer focuses on business processes and components. The data access layer exposes database data. Popular design patterns like MVC, PAC, and others are explained as ways to achieve separation of concerns and improve maintainability. MVC divides the presentation layer into separate controller and view components. PAC defines a hierarchical structure of cooperating agents with presentation, abstraction, and control components.
discussions about different types of architectures used in web applications, pros and cons of each architecture. MVC design patters and comparison with 3-tier.
This document compares the J2EE and .NET platforms using a separation continuum model. It defines key terms related to J2EE, .NET, and distributed application architectures. The document outlines a logical tier model and a service-based architecture model for conceptualizing large distributed solutions. It aims to map the technologies provided by J2EE and .NET to the separation continuum for analysis and comparison.
In this fourth presentation on domain-driven design, we present the architectural patterns that are most commonly used (layered architecture, hexagonal architecture and CQRS), describing their characteristics and suggesting when and how to use them
The document discusses various software architectures, including layered architecture, virtual machines, and interaction architectures like Model View Controller (MVC). It describes layered architecture as decomposing a system into hierarchical layers, with each layer having a defined responsibility. MVC separates an application into three components - the model, the view, and the controller. The model manages the data and business logic, the view displays the data, and the controller handles input and invoking changes. Variations like MVC-II separate the controller and view into distinct modules. Overall the document provides an overview of common software architectures and design patterns for structuring interactive applications.
Topic1 Understanding Distributed Information Systemssanjoysanyal
This document discusses the evolution of distributed information system architectures from one-tier to multi-tier systems. It describes how early systems had all layers merged, while two-tier client-server architectures separated the presentation layer on clients. Three-tier systems then introduced middleware to better integrate between servers. Modern n-tier architectures support complex systems and internet connectivity, with layers distributed across networks and devices.
The document discusses architectural design and provides examples of different architectural patterns and application architectures. It begins with defining architectural design and its role in the system design process. It then covers topics such as architectural views, patterns like Model-View-Controller and layered architectures. Examples are given of different application architectures for transaction processing and information systems. Key decisions in architectural design and documenting architectures are also summarized.
The document discusses architectural design and key concepts:
- Architectural design determines the subsystems of a system and how they communicate. It represents the link between specification and design.
- Views and patterns are used to document architectures. Common views include logical, process, development, and physical views. Patterns like MVC and layered architectures organize systems.
- Architectural design involves decisions like the application architecture, distribution, styles, decomposition, and documentation. Views and non-functional requirements influence these decisions.
The document discusses different application architectures: single-tier, two-tier, three-tier, and n-tier. In a single-tier architecture, all application elements exist in a single process. A two-tier architecture divides the application into client and server tiers. A three-tier architecture adds a business tier between the client and server tiers. An n-tier architecture further divides business services into multiple manageable units across multiple tiers.
The document discusses architectural design in software engineering. It covers topics like architectural design decisions, views, patterns, and application architectures. Architectural design involves identifying major system components and their communications in order to represent the link between specification and design processes. Common architectural patterns discussed include model-view-controller, layered architectures, repositories, client-server, pipes and filters. The document also provides examples of architectures for different types of applications like transaction processing systems and information systems.
The document discusses various software architecture design concepts and models. It begins by defining software architecture as the structure of a system comprising software components, their relationships, and externally visible properties. It then describes the architectural design process involving system structuring, control modeling, and modular decomposition. Several architectural models are presented including static, dynamic, interface, and relationship models. Common architectural styles like layered, client-server, and data-centered are explained. The document also discusses representative client-server systems, control models, repository models, three-tier architectures, and the model-view-controller pattern. Finally, it briefly introduces some other architectural models such as real-time control, selective broadcasting, interrupt-driven control, compiler, and multiprocess
This document discusses analyzing the requirements of a restaurant system using UML diagrams. It describes drawing interaction diagrams to realize use cases, defines attributes and operations for each class, and discusses responsibilities and cohesion of classes. It also covers software architecture patterns, mapping a three-tier architecture to the restaurant system, and refining the domain model based on use case analysis.
Subject: Software Architecture Design
Topic: Distributed Architecture
In this presentation, you will learn about design pattern, softawre architecture, distributed architecture, basis of distributed architecture, why distributed architecture, need of distributed architecture, advantages and disadvantages of DA and much more.
Rate my presentation, It's designed graphically.
The document discusses architectural design and provides information on architectural design decisions, views, patterns, and levels of abstraction. It describes architecture in the small as concerned with individual programs, while architecture in the large refers to complex enterprise systems. There are advantages to explicitly designing architecture such as stakeholder communication, system analysis, and large-scale reuse. Architectural views include logical, process, development, and physical views. Design decisions depend on requirements like performance, security, safety, availability, and maintainability. Common patterns include model-view-controller and layered architectures.
The document discusses architectural design and software architecture. It covers topics like architectural design decisions, views, patterns, and application architectures. Architectural design represents the link between specification and design and involves identifying major system components and their communications. Common architectural representations include box and line diagrams, while views provide different perspectives of the system. Architectural patterns like Model-View-Controller and layered architectures help structure systems and promote reuse.
The document discusses software architecture, including:
1. Definitions of software architecture and how it is influenced.
2. Common sections of a software architecture document such as introduction, views, goals and quality.
3. Architectural patterns and views including model-view-controller, layered patterns, and the "4+1" views of logical, process, deployment, and implementation.
4. How architecture addresses concerns like complexity, communication, and early decisions.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers, improving flexibility and scalability. An example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data storage across tiers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers, improving flexibility and scalability. An example is a shopping cart application with tiers for the client/user interface, presentation, business logic/integration, and data.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into even smaller, specialized modules. This improves flexibility, scalability, and the ability to update and maintain parts of the application independently. A common example is a shopping cart application, which separates components like the user interface, business logic for tasks like payment processing, and data access into independent tiers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into even smaller, specialized modules. This improves flexibility, scalability, and the ability to update and maintain parts of the application independently. A common example is a shopping cart application, which separates components like the user interface, business logic for tasks like payment processing, and data access into independent tiers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data storage across tiers.
Practical eLearning Makeovers for EveryoneBianca Woods
Welcome to Practical eLearning Makeovers for Everyone. In this presentation, we’ll take a look at a bunch of easy-to-use visual design tips and tricks. And we’ll do this by using them to spruce up some eLearning screens that are in dire need of a new look.
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The document discusses various software architecture design concepts and models. It begins by defining software architecture as the structure of a system comprising software components, their relationships, and externally visible properties. It then describes the architectural design process involving system structuring, control modeling, and modular decomposition. Several architectural models are presented including static, dynamic, interface, and relationship models. Common architectural styles like layered, client-server, and data-centered are explained. The document also discusses representative client-server systems, control models, repository models, three-tier architectures, and the model-view-controller pattern. Finally, it briefly introduces some other architectural models such as real-time control, selective broadcasting, interrupt-driven control, compiler, and multiprocess
This document discusses analyzing the requirements of a restaurant system using UML diagrams. It describes drawing interaction diagrams to realize use cases, defines attributes and operations for each class, and discusses responsibilities and cohesion of classes. It also covers software architecture patterns, mapping a three-tier architecture to the restaurant system, and refining the domain model based on use case analysis.
Subject: Software Architecture Design
Topic: Distributed Architecture
In this presentation, you will learn about design pattern, softawre architecture, distributed architecture, basis of distributed architecture, why distributed architecture, need of distributed architecture, advantages and disadvantages of DA and much more.
Rate my presentation, It's designed graphically.
The document discusses architectural design and provides information on architectural design decisions, views, patterns, and levels of abstraction. It describes architecture in the small as concerned with individual programs, while architecture in the large refers to complex enterprise systems. There are advantages to explicitly designing architecture such as stakeholder communication, system analysis, and large-scale reuse. Architectural views include logical, process, development, and physical views. Design decisions depend on requirements like performance, security, safety, availability, and maintainability. Common patterns include model-view-controller and layered architectures.
The document discusses architectural design and software architecture. It covers topics like architectural design decisions, views, patterns, and application architectures. Architectural design represents the link between specification and design and involves identifying major system components and their communications. Common architectural representations include box and line diagrams, while views provide different perspectives of the system. Architectural patterns like Model-View-Controller and layered architectures help structure systems and promote reuse.
The document discusses software architecture, including:
1. Definitions of software architecture and how it is influenced.
2. Common sections of a software architecture document such as introduction, views, goals and quality.
3. Architectural patterns and views including model-view-controller, layered patterns, and the "4+1" views of logical, process, deployment, and implementation.
4. How architecture addresses concerns like complexity, communication, and early decisions.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data access across different tiers or servers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers, improving flexibility and scalability. An example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data storage across tiers.
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The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into even smaller, specialized modules. This improves flexibility, scalability, and the ability to update and maintain parts of the application independently. A common example is a shopping cart application, which separates components like the user interface, business logic for tasks like payment processing, and data access into independent tiers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into even smaller, specialized modules. This improves flexibility, scalability, and the ability to update and maintain parts of the application independently. A common example is a shopping cart application, which separates components like the user interface, business logic for tasks like payment processing, and data access into independent tiers.
The document discusses N-tier architecture, which divides applications into multiple tiers or layers. A 1-tier architecture has all components on one machine. A 2-tier architecture separates the user interface from data storage. A 3-tier architecture separates the presentation, application/business logic, and data tiers. N-tier architecture provides finer granularity by separating an application into smaller specialized modules or functions across multiple tiers. This improves flexibility, scalability, and the ability to update or replace components independently. A common example is a shopping cart application, which separates components like the user interface, business logic for processing orders, and data storage across tiers.
Semelhante a Software Architecture - Architecture Styles and Patterns-1.pdf (20)
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International Upcycling Research Network advisory board meeting 4Kyungeun Sung
Slides used for the International Upcycling Research Network advisory board 4 (last one). The project is based at De Montfort University in Leicester, UK, and funded by the Arts and Humanities Research Council.
5. SoftwareArchitectureParts
SoftwareArchitecture consists of the structure
of the system (denoted as the heavy black lines
supporting the architecture), combined with
architectural characteristics (“-ilities”) the
system must
support, architecture decisions, and finally
design principles.
4
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Fig 1 : SA Parts
6. SoftwareArchitectureParts
5
The structure of the system, as
illustrated in the figure refers to the type
ofarchitecturestyle(orstyles) the
system is implemented in (such as
microservices, layered, or microkernel).
Describing an architecture solely by the
structure does not wholly elucidate an
architecture.
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Fig 2 : SA Parts (Structure)
9. 8
Architecture-Style
An architectural style is a set of features characterizing an
architecture.
An Architectural Style, on the other hand, is just a name given to a
recurrent architectural design. Contrary to a pattern, it doesn't
exist to "solve" a problem.
Architectural Style refers to a set of guidelines or principles for
designing and building software systems.
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11. 10
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Architecture-Patterns
An ArchitecturalPatternis a way of solving a recurring architectural
problem.
An ArchitecturalPattern is a specific, reusable solution to a common
problem or design issue in software architecture.
Architectural patterns are used to solve problems related to
architectural style. They are similar to design patterns but have a
different gateway. design patterns touch a specific part of the code to
apply a pattern. The level of granularity is the section of the code.
Architectural patterns have a larger level of granularity. It applies to
system components, functionality, and operation.
12. Architecture-Patterns
11
example: MVC, for instance, solves the problem of separating the UI
from the model. Sensor-Controller-Actuator is a pattern that will help
you with the problem of actuating in the face of several input sense
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Fig 3 : SA MVC
14. 13
Two-tiered(Client/Server)architecturalstyle
This is one of the most common
styles in distributed systems. It is
charac- terised by division of
components into either clients or
servers: Clients request services from
servers, and servers provide services
to clients, but servers do not require
services from clients. In general there
are a larger number of clients than
servers. Either or both clients/servers
may be composite components.
Fig 4:: Clients and Server
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15. 13
Two-tiered(Client/Server)architecturalstyle
Advantages:
Applications can be easily developed and deployed due to simplicity.
The database server and application logic is physically close, which offers higher
performance, provided the users are manageable.
Disadvantages
On the other hand, the 2 tier architecture disadvantages are:
The performance of the application is degraded with increasing users. When
simultaneous client requests are made, application performance degrades rapidly
due to the fact that clients necessitate separate connections and increased CPU
memory.
Since the client holds most of the application logic, difficulties often arise in
controlling software versions and distributing new versions.
It’s often difficult to implement reliable security since users need to have login
information for every data server.
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16. 15
N-tieredarchitecturalstyle
This style is useful for separating
application logic into separate
software packages at different levels.
of platform-specificity, so that
business logic is separated from UI
code and data persistence code. The
tiers or levels correspond to the clean
architecture levels, except that data
storage and UI aspects are typically
in separate tiers, whereas they are
considered to be at the same level in
the clean architecture. The style is
widely used for mobile apps,
enterprise systems, etc.
Fig 5: 3-tiered architectural
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17. 16
3-tieredarchitecturalstyle A 3 tier architecture refers to a software
architecture in which the user presentation
interface, the business logic and the data
storage server are developed and
maintained as independent modules on
separate hardware platforms. The client
does not directly communicate with the
database server. Instead, the client interacts
with an application server which further
communicates with the data tier which
contains the database server that is used
for query processing and transaction
management. The business tier serves as a
medium for the exchange for partially
processed data between the database
server and the client. A three-tier
architecture often allows any one of the
three tiers to be upgraded or replaced
independently. The three tiers of this
software architecture are:
Fig 6: 3-tiered architectural
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18. 17
Three-tiered(Client/Server)architecturalstyle
The 3 tier architecture has the following advantages:
It can scale without degraded performance since no separate connections from
each client are not required.
There is improved data integrity because data corruption from client applications
can be eliminated by passing the data in the business tier for validation.
It’s often easier to implement improved security since client applications don’t have
direct database access.
It’s possible to scale or change the implementation of a tier on its own without
affecting other tiers of the system.
On the other hand, 3 tier architecture disadvantages are:
There is increased complexity of implementation as the communication points are
increased (presentation tier to business tier to the data tier, instead of direct client
tier to data tier communication).
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21. 19
LayeredArchitecture
Components within the layered
architecture pattern are organized
into horizontal layers, each layer
performing a specific role within
the application (e.g., presentation
logic or business logic). Although
the layered architecture pattern
does not specify the number and
types of layers that must exist in
the pattern, most layered architec‐
tures consist of four standard
layers: presentation, business,
persis‐ tence, and database Figure.
Fig 8: Layered architecture
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22. 20
LayeredArchitecture:Description
Presentationlayer: This is the layer that interacts with users through screens, forms, menus,
reports, etc. It is the most visible layer of the application. It defines how the application looks.
Businessruleslayer:This layer contains rules that determine the behavior of the whole
application, such as, “If an invoice is printed, then send an email to the customer, select all items
sold, and decrease their stock in the stock management module.”
Thepersistencelayeris responsible for storing data and files. It gets the data from the database
or the hard drive and sends it back to the business layer which then sends it back to the
presentation layer.
Databaselayer:This layer contains the tables, indexes, and data managed by the application.
Searches and insert/delete/update operations are executed here.
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23. 21
One of the powerful features of the layered architecture pattern is the separationofconcerns among
components. Components within a specific layer deal only with logic that pertains to that layer.
KeysConcepts
Fig 9:Layated Architecture
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24. 22
KeysConcepts(Closed Layers and request access)
Notice in Figure that each of the layers in the architecture is marked as being closed. This is a very
important concept in the lay‐ ered architecture pattern. A closed layer means that as a request moves
from layer to layer, it must go through the layer right below it to get to the next layer below that one
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Fig 10: Layated Architecture
25. 23
KeysConcepts(LayeredofIsolation)
The layers of isolation concept means that changes made in one layer of the architecture generally
don’t impact or affect components in other layers
The layers of isolation concept also means that each layer is inde‐ pendent of the other layers, thereby
having little or no knowledge of the inner workings of other layers in the architecture.
Fig 10:Layated Architecture
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27. 25
There are several advantages to using layered architecture:
Layers are autonomous: A group of changes in one layer does not affect the others. This
is good because we can increase the functionality of a layer, for example, making an
application that works only on PCs to work on phones and tablets, without having to
rewrite the whole application.
Layers allow better system customization.
There are also a few key disadvantages:
Layers make an application more difficult to maintain. Each change requires analysis.
Layers may affect application performance because they create overhead in execution:
each layer in the upper levels must connect to those in the lower levels for each
operation in the system.
AdvantagesandDisadvantages
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30. 28
A C4 diagramisagraphicalrepresentationofasoftware
system'sstatic structure and behavior using a collection of
diagrams. The 'C4' in C4 diagram stands for Context, Container,
Component, and Code, which are the four levels of abstraction
that the diagram illustrates.
C4:Context,Containers,ComponentsandClasses
31. 29
C4:Context,Containers,ComponentsandClasses
If software architecture is about
the structure of a software
system, it’s worth
understanding what the major
building blocks are and how
they fit together at differing
levels of abstraction.
ACommonsetofabstractions
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34. 32
C4:Context,Containers,ComponentsandClasses
Components: A component can be
thought of as a logical grouping of
one or more classes. For example, an
audit component or an
authentication service that is used
by other components to determine
whether access is permitted to
specific resource. Components are
typically made up of a number of
collaborating classes, all behind
higher level contract.
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35. 34
C4:Context,Containers,ComponentsandClasses
Containers: A container represents something in which components are executed
or where data resides. This could be anything from a web or application server
through to a rich client application or database. Containers are typically executables
that are started as a part of the overall system, but they don’t have to be separate
processes in their own right. For example, I treat each Java EE web application or
.NET website as a separate container regardless of whether they are running in the
same physical web server process. The key thing about understanding a software
system from a containers perspective is that any inter-container communication is
likely to require a remote interface such as a SOAP web service, RESTful interface,
Java RMI, Microsoft WCF, messaging, etc
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37. C4:Context,Containers,ComponentsandClasses
Systems: a system is the highest level of abstraction
and represents something that delivers value to
somebody. A system is made up of several separate
containers. Examples include a financial risk
management system, an Internet banking system, a
website and so on.
Context: A high-level diagram that sets the scene;
including key system dependencies and actors.
36
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