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Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
Are APIs and SOA
Converging?
Sachin Agarwal VP Product MarketingSOA Software
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
What is SOA?
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
What is SOA?
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
What is SOA?
• Service Oriented Architecture : A loosely-coupled architecture designed to meet the business needs of the organization.
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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”
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
What are APIs?
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
What is an API?
Your ApplicationYour APIYour Customers
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
Characteristics of an API
• Well documented (human-readable)
• Easy to consume• Can be self-
provisioned by developers and partners
• Published through an API Portal
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Extend the Reach of your Business
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Capture new Opportunities with APIs
Drive Innovation
Increase Reach
Support New Devices
Discover New Business Models
Increase Partner Network
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
The API Advantage
• Easy to consume• Well documented• Self Provisioned• Developers are attracted to use the best APIs• Business Driven
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
API AND SOA MYTHS
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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
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
The relationship between APIs and SOA
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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.
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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
Copyright © 2001-2013 SOA Software, Inc. All Rights Reserved.
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