are apis and soa converging?

Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.

Are APIs and SOA

Converging?

Sachin Agarwal VP Product MarketingSOA Software


What is SOA?


What is SOA?

• Service Oriented Architecture : A loosely-coupled architecture designed to meet the business needs of the organization.


SOAP, WSDL, UDDI and Repository

• SOA was initially focused on UDDI, WSDL and SOAP

• SOAP had widespread adoption• WSDL provided interface definition• UDDI standard, while ratified, lost

support• UDDI Registry as replaced by the

Repository

• But due to complexities of type of integration challenges, SOAP/XML became “heavy weight”


What are APIs?


What is an API?

Your ApplicationYour APIYour Customers


Characteristics of an API

• Well documented (human-readable)

• Easy to consume• Can be self-

provisioned by developers and partners

• Published through an API Portal


Extend the Reach of your Business


Capture new Opportunities with APIs

Drive Innovation

Increase Reach

Support New Devices

Discover New Business Models

Increase Partner Network


The API Advantage

• Easy to consume• Well documented• Self Provisioned• Developers are attracted to use the best APIs• Business Driven


API AND SOA MYTHS


Myths and Facts

Myth Fact

SOA is a technology SOA is a design philosophy independent of any vendor, product, technology or industry trend.

SOA requires web services/SOAP

SOA is not limited to SOAP/web services

APIs are not SOA APIs are services, and in that aspect are more like SOA

APIs require REST/JSON APIs are not limited to REST/JSON

SOA is internal, APIs are external

While the open model of APIs make it more suited for external consumption, they could each be used in either scenarios


The relationship between APIs and SOA


The 3-Tiers of APIs and SOA Lifecycle

BusinessFoundation/FunctionalTier

Service Arch.LifecycleData Arch.API Design

Non-FunctionalTier

Security, Mediation, Orchestration, QoS, Analytics

ProtocolTier

Publishing, OAuth, Portal, WSDL Swagger ,etc.


APIs vs. SOA

• APIs are a superset of Web Services – it is a business differentiation, not a technical one– Business, product focus– APIs are open, easy to consume

• Documentation– APIs

• Pro : Human readable• Con : Change management is subjective

– Web Services primarily use WSDL and WS-Policy• Pro : Change management is explicit• Con : Difficult to understand

• Security– APIs typically leverage OAuth or HTTP request signing

mechanisms for security• Transport-based (HTTP)

– SOA leverages WS-S, SAML, WS-Trust, etc• Message-based


The Need for Both

• Simplify Documentation– Document generation– Code generation

• APIs may need to be SOAP as well as JSON/REST• Security mediation between web standards and WS-*

standards is critical• A deep understanding of the different standards and policies

is required, including:– OAuth 1.0a/2.0– Header-based signature mechanisms– SAML– WS-Security– XACML– OpenID/Connect


Are API and SOA Converging?

SOA, in its focus on machine to machine integration and standardization, forgot about the human in the

equation.

APIs, in their focus on ease of use, have forgotten about management, lifecycle and control.

You need both


API and SOA Resources

• Resource Center– http://resource.soa.com/

• Webinar Recording– http://resource.soa.com/resource/webinars

• Follow us on:

www.facebook.com/soasoftware

www.linkedin.com/company/soasoftware

@soasoftwareinc

http://resource.soa.com/resource/webinars

http://resource.soa.com/resource/webinars

are apis and soa converging?

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