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SOA Solution PatternsAfkham Azeez,

Architect & Product Manager WSO2 WSAS, WSO2, Inc.azeez@wso2.com

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We will...see how to implement an SOA solution using basic elements of an SOA infrastructure.

...demonstrate how to map enterprise SOA patterns, to a few real world and a few hypothetical business requirements.

...discuss SOA implementation details using products from the WSO2 SOA Platform.

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Overview

Patterns SOA Infrastructure Solution building roadmap 3 usecases

Scenario, pattern mapping & implementation Enhancements

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What is a pattern?

A generic reusable solution for a common recurring problem.

Tried & tested Robust (stood the test of time) Maintained in a catalog Feel comfortable using

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SOA Solution Patterns

OO Patterns

EAI Patterns

EAA Patterns

SA Patterns

Other

OO - Object-OrientedSA – Software ArchitectureEAI – Enterprise Application IntegrationEAA – Enterprise Application Architecture

Santa ClaraSOA Infrastructure – The Building Blocks

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Solution Building Roadmap

Requirements Business Patterns Integration Patterns

Application Patterns

Runtime Patterns

Product Mappings

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Usecase-1 (Business Scenario)

Client/frontend developersPMs, Finance, HR etc.

Change Again ?

● Service client and service connected in P2P fashion in a production System.

● Backend service development team has decided to change the backend services.

● Secure the backend services.● Change the service contracts.● Introduce multiple services in place of a single service.

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Usecase-1 (Pattern Mapping)

Service Broker Pattern Pipes and Filters

Transform Route

Trusted Subsystems Functional Decomposition Service Encapsulation

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Usecase-1 (Implementation)

Pipes and filtersRoute Trusted subsystems

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Usecase-1 (Implementation) cont..

MediationDBLookup

Pipes and filtersRoute Transform

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Usecase-1 (Implementation) cont..

Pipes and filtersRoute

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Usecase-1 (Implementation) cont..

Pipes and filtersRoute Functional decompositionService encapsulation

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Usecase-2 (Business Scenario)

Expose the service to the outside world?

NO you can't!

● A service that hosted in a local network required to accept requests from outside need to

● Need to virus scan & validate the content outside LAN before accepting.

● Incoming protocol may be different from the protocols allowed within the LAN

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Usecase-2 (Pattern Mapping)

Service Firewall Protocol Bridge

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Usecase-2 (Implementation)

Service FirewallProtocol Bridge

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Usecase-3 (Business Scenario)

Throw away the old systems

$$ ? NO SOA!

Data ?

● SOA infrastructure to be implemented in an environment containing legacy systems and legacy databases.

● Existing systems are robust and the data is crucial for decision making.

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Usecase-3 (Pattern Mapping)

MDM (Master Data Management) EDA (Event Driven Architecture)

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Usecase-3 (Implementation)

MDM

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Usecase-3 (Implementation) cont..

MDM

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Usecase-3 (Implementation) cont..

MDMEDA

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Enhancements

Governance ● Shared registry/repository operational/runtime governance

● Monitoring ● Management

Clustering ● Availability● Load

Create your own patterns for your needs

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Summary - Patterns

Service broker Pipes & filters Route Trusted subsystems Transformation Functional decomposition Service encapsulation Service firewall Protocol bridge Master Data Management Event Driven Architecture

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Summary

Identify the business requirements. Map them to patterns. Avoid P2P. Think about the ROI. Keep all stakeholders happy. Optimize the usage of the application. Apply SOA correctly, use it in a practical

manner.

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QuestionsQuestions