Q. What is SOA?
Service oriented Architecture
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It’s an architecture solution to build an
integrate systems, applications, process and businesses.
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Service Oriented Architecture (SOA) is used to
develop Enterprise applications by using a collection
of services which communicates each other.
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Service-Oriented Architecture (SOA) is a set of
principles and methodologies for designing and developing software in the form
of interoperable services.
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It is a design pattern or software architecture
which provide service to other application.
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It is implemented as web service.
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Architecture style and approach.
è SOA is a collection of services.
SOA is
a design methodology that advocates exposing of product
functionality as services.
This enables to
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Reuse functionality
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Have loose coupling between functionalities
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Abstract implementation
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Allow multiple protocols to
talk to each other
SOA:
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Reusability
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Distributed deployment
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Interoperability
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Compensability
Key
Role:
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Service consumer
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Service provider
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Service registry
SOA key
technologies include:
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XML
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Webservices
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SOAP
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WSDL
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UDDI
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XPATH XQUERRY
SOA
Benefits:
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Increase response time
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Help businesses become more cost effective
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Separate consumers and services
SOA
Principles:
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Loose Coupling
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Reusability
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Interoperability: In SOA, We can easily
communicate btn different component in SOA.
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Flexible
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Service
Autonomy
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Service Contract
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Service Abstraction
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Discoverability
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Service statelessness
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Scalability: Without affecting code we can add
different adapter
W
Q What is the most important skill needed to adopt SOA ?technical or cultural?
->SOA does require people to think of business and technology differently.
-> First think in terms of business functions, or services.
-> (e.g., My company does these business functions, so how can I set up my IT system to do those things for me most efficiently?).
-> (e.g., If we implement this system, what kinds of things can we do with it?)
-> Developers who focus on building an SOA solution rather than solving a specific business problem are more likely to create complex, unmanageable, and unnecessary interconnections between IT resources.
-> Another common pitfall is to try to solve multiple problems at once, rather than solving small pieces of the problem.
-> Taking a top-down approach—starting with
major organization-wide infrastructure investments
->Often fails either to show results in a
relevant timeframe or to offer a compelling return on investment.
Q. Challenges
faced in SOA adoption?
One of the challenges faced by SOA is managing services
metadata.
Second biggest challenge is the lack of testing in SOA
space.
Another challenge is providing appropriate levels of
security.
Interoperability is another important aspect in the SOA
implementations.
Vendor hype concerns SOA because it can create
expectations that may not be fulfilled.
Q. Which approach between top-down and bottom-up methodologies best fits with a SOA in regards of Service identification?
building architecture is a Top-Down process.
To sum up: Initially SOA is a Top-Down approach but pragmatic approach requires mixing Top-Down approach with Bottom-Up approach.
Q. What
are the main benefits of SOA?
-> SOA helps create greater alignment
between IT and line of business
-> More flexibility – IT flexibility to
support greater business flexibility.
-> Better reuse out of your existing IT
investments as well as the new services you’re developing today.
-> SOA also provides an architectural
model for integrating business partners’, customers’ and suppliers
-> This reduces cost and improves
customer satisfaction.
-> Components stay loosely coupled and
can be reconfigured.
-> Business services can be reused.
-> Data Security & Confidentiality.
-> Well defined Interfaces.
-> Better Flexibility and Maintenance.
Q. What
is Oracle Fusion Middleware?
Oracle Fusion Middleware
is a collection of standards-based software products that spans a range of
tools and services.
Oracle Fusion Middleware
offers complete support for development, deployment, and management.
The design tool includes a
single design environment for user interface, business logic, service
composition, business process or workflow, business rules, and business
intelligence. The design tool enables simplified design and debugging, and to
improve productivity.
Q. Is Oracle SOA same as Oracle Fusion
Middleware?
No because SOA is one of the parts in Fusion middleware and SOA behaves like user interface whereas Fusion is big platform.
Q. Service-Oriented Architecture?
Service Oriented Architecture is an architectural design
which includes collection of services in a network which communicate with each
other.
SOA architecture is
viewed as five horizontal layers. These are described below:
·
Consumer Interface Layer:
o This layer is used by customer
o These are GUI based apps for end users accessing the applications.
·
Business Process Layer:
o Provide
the business process flow. Also accommodates new changes in business easily.
o These
are business-use cases in terms of application.
·
Services Layer: These are whole-enterprise, in service
inventory.
·
Service Component Layer: are used to build the services, such as
functional and technical libraries.
·
Operational Systems Layer: It contains the data model.
Q. Is Oracle SOA Suite tool state full?
Yes, SOA Suite tool is a state full tool, that means in this
tool we store every state in database i.e. we store all the incoming messages,
transformed messages, and outgoing messages to database along with timestamp.
Q. What Is
Oracle Soa Suite Tool ?
SOA Suite tool is a middleware tool from Oracle which is
based upon SOA concept comes under Oracle Fusion Middleware stack.
We use this tool for integration purpose.
.i.e. this tool is used to integrate two system/applications
etc.
Q. Which
Application Server Required For Oracle Soa Suite Tool?
Mostly WebLogic server is used as application server for
Oracle SOA Suite tool.
Q. What is SCA
Service Component Architecture (SCA) assembly model
abstracts the implementation and allows assembly of components, with little
implementation details.
SCA enables you to represent business logic as reusable
service components that can be easily integrated into any SCA-compliant
application.
The resulting application is known as a SOA composite
application. The specification for the SCA standard is maintained by the Organization
for the Advancement of Structured Information Standards (OASIS).
SCA is a model that aims to encompass a wide range of technologies for service components and for the access methods which are used to connect them.
The composite service has the assembly of different components of the application and these components can be deployed together at once using SCA.
The various specifications of SCA are as shown below:
Ø Assembly Model Specification.
Ø Binding Specification.
Ø Components Implementation Specification.
Ø Policy Framework Specification.
Ø Assembling the service components into a SOA composite application.
Ø SCA provides a programming model that model allows creating service components written with a wide range of technologies
Ø Provide a framework for building applications using SOA
Ø Define a composite application where set of services are assemble together
Ø Provide a assemble model to wire together new services and existing services
Ø Extend and compliments existing approaches to implements services.
Ø Designed based on open standards such as web services.
Benefits Of SCA?
1. Easier Development : No need to write lengthy code as we get all components prebuilt.
2. Easily compose a assembly (composite) by just linking different these prebuilt components.
3. Better re-usability
SCA can made up of:
Ø BPEL Process
Ø Mediator
Ø Human task
Ø Business Rules
SCA simplified the entire lifecycle
Development:
è JDev can be used to develop all components.
Deployment:
è All components are grouped together in a composite and during compilation, we get a single file called SAR
è SAR can be versioned as one, deployed as one and managed as one.
Monitoring:
è EM allows to trace the entire flow, giving ability to drill down into components of a composite
Q. Composite
Q. What Is BPEL?
BPEL provides enterprises with an industry standard for
business process orchestration and execution. Using BPEL, you design a business
process that integrates a series of discrete services into an end-to-end process
flow. This integration reduces process cost and complexity.
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BPEL stands for Business Process Execution
Language.
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it is one of the component of SOA Suite tool.
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BPEL is a XML based language used to design
business process/flows.
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We perform service orchestration in BPEL.
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We design a business process that integrates a
series of discrete services into an end-to-end process flow.
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BPEL is a sub-set of the Business Process
Management discipline.
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BPEL bridges the gap between BPM and SOA.
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BPEL does what BPM cannot do on its own
i.e. execute/orchestrate processes across department/functional systems in a standard way while at the same time providing Visibility & Control to the Business Process Owner
Q. What Are Different Parts Of BPEL?
Below are different parts of BPEL as mentioned
1. Service Interface: A WSDL
describing the functionality of the BPEL process.
The service interface
provides the end user a way to interact with the BPEL process component using
Service Interface / Service Binding.
2. Activities: units of work. The actual elements
that make up the BPEL process flow or sequence of instructions to be executed.
3. Partner links: also called Reference bindings.
A partner link
describes the roles played for the interaction between the BPEL process and the
service it invokes.
Q. What Is Wire?
Connection between service & binding component and
within service & binding components know as wire.
I.e. this enable us to graphically connect the components in
a SOA composite application.
Q. How We
Can Deploy Composite To SOA Server?
There are different methods to deploy SOA composite to SOA
server.
1.
Through EM console
2.
Directly from JDeveloper
3.
Scripting (Ant, WLST etc.)
Q. Which
Ide We Use For Oracle Soa Suite Tool?
We use JDeveloper IDE for Oracle SOA suite tool.
Q. Is Oracle SOA Suite tool state full
Yes,SOA Suite tool is a state full tool, that means in this tool we store every state in database i.e. we store all the incoming messages, transformed messages, outgoing messages to database along with timestamp.
Q. What All Components/products Needs to Be Installed before We Install Oracle Soa Suite Tool?
Following components needs to be installed before we install
Oracle SOA Suite.
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1. JDK 2. Database 3. All Required Schema
(Created using RCU) 4. WebLogic Server Q) What Are The Components Comprise
An Oracle Soa Suite Installation? Answer : The following
components comprise an Oracle SOA Suite installation: o
Service Infrastructure o
Oracle Mediator o
Oracle Adapters o
Business Events and Events Delivery Network o
Oracle Metadata Repository o
Oracle Business Rules o
Oracle WSM Policy Manager o
Oracle BPEL Process Manager (Business Process Execution Language) o
Human Workflow o
Oracle Business Activity Monitoring o
Oracle User Messaging Service o
Oracle B2B o
Oracle JDeveloper
o
Oracle Enterprise Manager Q) What Is
The Purpose Of Service Data Objects (sdo)? Service Data Objects (SDO) provides a data programming
architecture. It provides a standardized view on data,and provides efficient
transportation, as well as change capture, in form of a change summary. More
specifically, it collects a data graph of related business objects, called
DataObjects. This graph tracks the schema that describes the DataObjects. Knowledge is not required about how to access a particular back-end data source
to use SDO in a SOA composite application. Consequently, you can use static or
dynamic programming styles and obtain connected and disconnected access. |
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