David Smiley

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Lead, follow or get out of the wayHere Comes SOA
www.oasis-open.org

• David Smiley
• SOA Technology Evangelist
• Software AG
• David.Smiley_at_softwareag.com

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Todays discussion

• Here Comes SOA
• Fundamentals
• Background and concepts of a Service-Oriented
  Architecture
• Standards that make SOA interoperability possible
• Registry, Repository and Metadata
• SOA Governance
• Security
• IT and Business Alignment
• Implementation Challenges and Solutions
• SOA Maturity Model

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Here Comes SOA
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Fundamentals

• Background and concepts of a Service-Oriented
  Architecture

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What Is a Service-Oriented Architecture?

• SOA provides a framework for creating loosely
  coupled business services that can communicate or
  interoperate without relying on a specific
  technology platform.
• SOA defines the business services that support a
  business process and then enables those services
  by combining internal, external and web services
  to support the business requirements.
• SOA provides the flexibility to reuse business
  services to produce multiple end-to-end business
  processes.

Service-oriented architecture (SOA) is a
Web-based, standards-driven, modular architecture
that promises to deliver pervasive integration
for real-time business agility META Group
February 2005
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Moving from the Past to SOA ...

• Packaged Applications are componentized
• Legacy Applications are turned into Services
• Complex systems are broken into service pieces
• Modules are being connected accordingto business
  needs

Legacy
Financials
CRM
Supply Chain
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Service Oriented Architecture
Composite Apps
Retrieve Data
Verify Details
Order Entry
Order Review
Approve Order
Initiate Shipment
Business Process
Business Service Orchestration
Customer Information
Order Management
Order Compensation
Service Bus
Services
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The interesting thing about services is
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Fundamentals

• Standards that make SOA interoperability possible

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Web Services Standards

• SOAP
• A protocol for exchanging XML-based messages over
  computer networks, normally using HTTP. SOAP
  forms the foundation layer of the Web services
  stack, providing a basic messaging framework that
  more abstract layers can build on.

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Web Services Standards

• HTTP
• Both SMTP and HTTP are valid application layer
  protocols for SOAP, but HTTP has gained wider
  acceptance as it works well with today's Internet
  infrastructure specifically, SOAP works well
  with network firewalls. This is a major advantage
  over other distributed protocols like GIOP/IIOP
  or DCOM which are normally filtered by firewalls.

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Web Services Standards

• WSDL
• An XML-based service description on how to
  communicate using web services. The WSDL defines
  services as collections of network endpoints, or
  ports. WSDL specification provides an XML format
  for documents for this purpose.

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Web Services Standards

• WS-I Basic Profile
• WS-I is an open industry organization chartered
  to promote Web services interoperability across
  platforms, operating systems and programming
  languages. The organizations diverse community
  of Web services leaders helps customers to
  develop interoperable Web services by providing
  guidance, recommended practices and supporting
  resources. All companies interested in promoting
  Web services interoperability are encouraged to
  join the effort.

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Web Services Standards

• WS-I Basic Profile
• Specifically, WS-I creates, promotes and supports
  generic protocols for the interoperable exchange
  of messages between Web services. In this
  context, generic protocols are protocols that
  are independent of any action indicated by a
  message, other than those actions necessary for
  its secure, reliable and efficient delivery, and
  interoperable means suitable for multiple
  operating systems and multiple programming
  languages.

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Fundamentals

• Registry, Repository and Metadata

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Registry

• A neutral 3rd party for negotiating, publishing,
  discovering and utilizing objects (such as
  services).
• Stores information and represents metadata
  objects about assets (such as WSDL, XML Schema or
  XPDL) and references them.
• Does not store those assets itself.

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Repository

• Storage for Service Related Artifacts
• Development XML Artifacts
• XSLT
• Non XML Development Artifacts
• Documents
• Forms

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Repository

• Storage of Service Components
• Process Definitions
• XPDL
• Ontologies
• Sequences
• Services
• More

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Metadata
The use of integration products and features is
expected to increase. However, challenges will
accompany this growth, particularly regarding
metadata management. Jess Thompson et al.
(11/2005)
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Registry and Repository
contains
contains
provides
belongs to
implements
owns
uses
Registrymetadata
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Fundamentals

• SOA Governance

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What is Governance?

• The term governance deals with the processes and
  systems by which an organization or society
  operate

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What is Governance?

• Corporate governance is the set of processes,
  customs, policies, laws and institutions
  affecting the way a corporation is directed,
  administered or controlled. Corporate governance
  also includes the relationships among the many
  players involved (the stakeholders) and the goals
  for which the corporation is governed.

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What is Governance?

• IT Governance is about visibility, accountability
  and making IT decisions, which works in tandem
  with IT Management that is about implementing
  various IT decisions. IT Governance keeps
  together the IT strategies and Business
  strategies and converts IT maxims into strategic
  actions.

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The Analyst's View
In 2006, lack of working governance mechanisms
in midsize-to-large SOA projects will be the
most common reason for project failure. -Yefim
V. Natis, Gartner Group, 11/2005
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Why Governance?

• Governance provides
• Authorities and responsibilities
• Clear rules and rule enforcement
• Organizational and technical transparency