pattern driven enterprise architecture

Pattern Driven Enterprise Architecture

Mifan Careem Director, Solutions Architecture, WSO2

Event Driven Architecture Shiroshika

Service Oriented Architecture Dassana

Resource Oriented Architecture Nuwan

Web Oriented Architecture Senaka

o  Definitions – Patterns, EA o  EA Frameworks – Zachman, TOGAF, Gartner o  Patterns in EA o  SOA, ROA, EDA and more o  Building an EA with patterns o  How to get there o  Agility and Change – NFRs o  Iterative Architecture

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An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context.

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Enterprise architecture (EA) is a well-defined practice for conducting enterprise analysis, design, planning, and implementation, using a holistic approach at all times, for the successful development and execution of strategy. Enterprise architecture applies architecture principles and practices to guide organizations through the business, information, process, and technology changes necessary to execute their strategies. These practices utilize the various aspects of an enterprise to identify, motivate, and achieve these changes."

o  A set of principals and practices for modeling enterprise business functions as services or micro services which has the following attributes. o  Standardized o  Loosely coupled o  Reusable o  Composable o  Autonomic o  Stateless o  Abstract o  Discoverable

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o  Agile, agile and agile o  Iterative design and implementation o  Shorter lifecycle and sprints o  Changing requirements o  Evolving NFRs

o  Standards based o  RESTful methodologies (HATEOAS, ROA, Entity Linking) o  Binary, HL7, FIX, NMEA

o  Heterogeneous systems o  Microservices and granular systems o  Integration and EDA o  Automation

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Business Architecture • Requirements Elicita>on • NFR and FR

Solu>on Architecture L0 • High level technical components

Solu>on Architecture L1 • Detailed Technical components

Applica>on Architecture • Design • Data Models • Service Catalog • APIs

Run>me Architecture • Capacity • Deployment Architecture • Security Architecture

Iden>fica>on Defini>on Representa>on Specifica>on Configura>on Instan>a>on

Zachman’s Model

WSO2 Model

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Services

Media>on

Transforma>on

Internal API Mgt

Async Messaging

Security

Mon

itorin

g

Audit

External API Mgt.

Single Page JS Mobile Apps Dashboard

External App Mgt.

Registry

Workflow

s

Analu>

cs

Services

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Services

Media>on

Transforma>on

Internal API Mgt

Async Messaging

Security

Mon

itorin

g

Audit

External API Mgt.


External App Mgt.

Registry

Workflow

s

Analu>

cs

Services

o  Many projects fail (CR, Resource overrun etc)

o  Design for agility o  Iterative Architecture o  Partitioned Architecture

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Services Services

Legacy Services

Core Services

Wrapper (Adaptor Pa[ern)

Cloud Services

Connectors

{Dead letter channel Guaranteed Delivery Store and Forward}

Data Services

Web Services

{Content based router Scatter-gather Content enricher} {Transactional client}

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Services Services

Legacy Services

Core Services Cloud Services

Identity, Authentication, Entitlement, Enterprise Identity Bus

LDAP

External IS

Token Valida>on

Mediation, Transformation

MQ

Identity Gateway, PEP

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Services Services

Legacy Services



MQ


Registry, Repository


ROA Fundamentals

o  Uses Representational State Transfer (REST) as the primary design pattern

o  Data is independent of the server and the client - The server implementation can change over time and there can be many clients.

o  Loose coupling is one of the objectives of the architecture o  “State” is treated as actions performed against the resource

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“The very notion of a link has become practically inexpressible and virtually unthinkable in the vernacular of SOA.” Sam Ruby

o  Listing a book in the library

GET /book/9780345376596 HTTP/1.1 Host: library.org

Accept: application/json ..

HTTP/1.1 200 OK Content-Type: application/json

Content-Length: …

{ "name": "the pale blue dot",

"ISBN": "9780345376596", "author": "carl sagan",

"borrow": "http://library.org/book/9780345376596/borrow" }

GET /book/9780345376596 HTTP/1.1 Host: library.org

Accept: application/json ..

HTTP/1.1 200 OK Content-Type: application/json

Content-Length: …

{ "name": "the pale blue dot",

"ISBN": "9780345376596", "author": "carl sagan",

"return": "http://library.org/book/9780345376596/return" }

➡  Listing a book after its been borrowed

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Services Services

Legacy Services



MQ




{ RESTful APIs HATEOAS Entity Linking }


API Token Management

API Store API Gateway

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Services Services

Legacy Services



MQ








Batch Analytics Predictive Analytics Interactive Analytics

o  Event hierarchies and fine grained-ness o  Self describing nature of the event payload o  No special packing for each receiver o  Multiple receivers for a single event o  Responsibility of handling state is with the

consumer o  Anonymity when sending an event o  Real time sending of events o  Async nature of delivery o  Guaranteed delivery

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Services Services

Legacy Services



MQ









o  Patterns help build robust, proven architectures o  Whilst EA focuses on a higher level, patterns

provide various levels of reusable best practices at various granularities

o  WSO2 middleware provides the ideal base platform for various patterns and concepts

o  An agile, partitioned, iterative architecture is ideal for building large scale systems

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