Combining Cloud Computing, SOA and Web 2.0

Service Orientated Architecture (SOA) and Web 2.0 technologies can help organizations  implement Cloud services in their IT environment.

The following diagram shows the layers of an emerging Enterprise Computing Stack.


Web 2.0 allows for building user interfaces and collaboration.  Within an organisation this technology is referred to as Enterprise Web 2.0, it can be delivered using enterprise portals such as Microsoft SharePoint, Oracle WebCenter Suite and IBM Websphere Portal.

SOA enables the building and integrating of applications improving business agility.    SOA can be used to take advantage of Cloud services and present these resources to the users via Web 2.0 technologies such as AJAX, Mashups, RSS and enterprise social computing.  SOA greatly reduces the risks when building Hybrid cloud environments by providing a more integrated on-premise and public cloud solution.  SOA also makes it easier to move services between Cloud environments.  If an organization doesn’t have an on-premise cloud, having an SOA environment helps to identify and integrate public cloud services into the existing environment.

The three Cloud computing layers shown in the diagram are:
Infrastructure as a Service (IaaS) provides hardware and system software as a service including Storage, Compute and Operating Systems.  These services provide access to IT infrastructure components.


Platform as a Service (PaaS) provides services for creating, deploying and managing applications
Software as a Service (SaaS) is application software delivered as a service.
These Cloud layers can be implemented individually, they do not depend on one another.  SOA principles can be applied when building the Cloud layers.  SOA architectural principles for example can be used to build a service-oriented Infrastructure as a Service (IaaS) layer.

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Courtesy:http://smartnova.wordpress.com/2011/01/08/combining-cloud-computing-soa-and-web-2-0/

What Technologies Makes Up an SOA?

Category	Technology	Description	Toolset Examples
Standards	XML	Markup language for defining the encoding of structured data sets	Application platforms, database platforms, COTS packages
	SOAP	Protocol specification for exchanging XML data over networks	Application platforms, COTS packages
	WSDL	XML language for describing web service contracts	Application platforms, COTS packages that expose WSDL, IDE tools such as XmlSpy for hand-crafting WSDL documents
	WS*	Set of web service standards of varying maturity that address message routing, security, attachment encoding, transactions and more.	COTS packages such as SAP, application platforms such as Microsoft WCF
	RESTful Services	Architectural style with a focus on resource orientation and interacting with the state of that resource through traditional HTTP verbs	.NET Framework 3.5+
Design	Service Modeler	Graphical tools for modeling SOA solutions	WebSphere Business Modeler, Mashup Tools
Data	Enterprise Entity Definitions	Computable representations of shared entities that may span multiple source systems	XSD, DDL
	Reference Data Architecture	Three components made up of: (a) Operation Data Stores for logical entity definitions that act as “real time data warehouse” consisting of both real-time and batch updated data (b) Data marts for data subset analysis, and (c ) Data Warehouse for enterprise data storage and analysis	Oracle, Teradata, SQL Server
	Enterprise Information Integration (EII)	Virtual integration of disparate data sources	Composite
	Data Service Interface Generation	Application for generating interfaces (SOAP/batch) on existing data repositories	BizTalk Server 09, .NET Framework, Composite
	Enterprise Service Bus	Reliable message routing, transformation, queuing and delivery across disparate technologies	BizTalk Server 09, Tibco, Sonic
	Application Adapters	Connectivity to cross-platform systems via configuration and/or abstract interfaces	BizTalk Server 09, BizTalk Adapter Pack (Siebel, SAP, Oracle)
	ETL Application	Bulk data extraction, cleansing and migration between repositories.  Frequently needed for consolidating data in the ODS	Informatica, SSIS
Infrastructure	Application Platforms	Libraries for building SOA solutions	.NET Framework, Java EE
	XML Gateway (Accelerators)	Focuses on SOA security and performance issues; typically a hardware appliance	WebSphere DataPower; Layer 7
	Complex Event Processing Engine	Concept where distinct application or system events are correlated with the goal of discovering critical business information in real time	Microsoft StreamInsight, Tibco, Oracle CEP
	Single Sign On	Single set of authenticated credentials can be converted to system-specific credentials without user intervention	Siteminder
	Data Quality Services	Used to cleanse data and validate data quality	DataFlux
	Load Balancing	Hardware or software solution which sits in front of physical web servers and is responsible for distributing load	F5; SOA Service Manager
	Web Hosting Platforms	Environment to making web services available to consumers	Microsoft IIS, Oracle WebLogic
Process Integration	BPM Server	Tooling that supports the modeling, simulation, execution, monitoring and optimizations of business processes	BizTalk Server 09;  Lombardi
	Business Rules Engine	Software system for maintaining business rules outside of compiled code	Microsoft BRE,           Oracle
	Orchestration Services	Arrangement of services into an executable business process often designed through a graphical model	BizTalk Server 09
	Business Activity Monitoring	Aggregation of activities, events and data that provides insight into organization and its business processes	BizTalk Server 09
Service Management	XML Service Management (XSM)	A platform independent system for administering, mediating and monitoring services	SOA Service Manager
	Repository	Metadata repository for service definitions	SOA Service Manager
	UDDI-compliant Registry	Interface for runtime infrastructure to discover and bind to service endpoints	SOA Service Manager
	Runtime Policies	Attach attributes to service (or operation) that dictates how the service request is secured and processed	SOA Service Manager
	SLA Enforcement	Define acceptable web service availability with customizable rules consisting of alert code, metric to monitor and an interval	SOA Service Manager
	Access Control Contracts	Limit usage of service based on distinct number of allowable attempts, time of day window, or based on caller identity	SOA Service Manager
	Service Lifecycle Management	Stage, status, approvals, dependency tracking, audit trail	SOA Service Manager
Security	Authorization	Verify user identity through LDAP integration, SAML tokens, x.509 certificates	Active Directory, Sun ONE LDAP, SOA Service Manager
	Authentication	User/group/role at service or operation level	SOA Service Manager
	Identity Management	Central storage of user profile

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