1. Overview of SOA and the role of ESB/OSB
Nahser Bakht
February 2014

2. Agenda
The Problem
The Solution: SOA
Core Concepts of OSB
Role and Features of OSB
Architecture of OSB

3. The Problem

4. “Is this the best methodology, are there other alternatives?”
Getting Started
Scenario
“Your team has developed a new application that needs to be integrated with the existing system, and you are considering a point-to-point integration strategy”
We need to explore
“Is this the best methodology, are there other alternatives?”

5. Enterprise Challenges
Application development and integration issues
Lack of flexibility (tightly coupled)
Not based on standards
Project costs and long duration
Traditional methodologies
Point-to-point
Enterprise Application Integration (EAI)

6. Point-to-point Integration
Packaged CRM
EAI
Client Tier
Custom Logic
Client Application
Custom Logic
Packaged ERP
ERP Application
Custom Logic
Client Application
Mainframe
Custom Logic
Custom Application
Client Application
App Server
EJB Application

7. Enterprise Application Integration (EAI)
Client Tier
VB Application
Java Application
Web Application
Proprietary Middleware API
Integration Hub
RMI
JAM API
Custom API
Custom API
App Server
Mainframe
Packaged ERP
Packaged CRM
EJB Application
Custom Application
ERP Application
Custom Logic

8. Service-Oriented Architecture: Definition
Service-Oriented Architecture is an IT Strategy that organises the discrete functions contained in enterprise applications into interoperable, standards-based services that can be combined and reused quickly to meet business needs.
Business
Strategy IT
Strategy
SOA

9. Integrating Solutions and Benefits with SOA
Offers faster business
Response time
Improves business agility
SOA
Aligns IT with business
Masks underlying
Technical complexity
Benefits
Agility
Reusability
Interoperability
Scalability
Cost
Efficiency

10. SOA and Services Services are SOA building blocks.
Services are a collection of capabilities.
SOA can be thought of as:
A collection of services on a network that communicate with one another.
A set of services that are loosely coupled with well-defined, reusable, platform-independent interfaces.
A higher level of application development.
Services provide access to data, business processes and IT infrastructure.

11. SOA Implementation Challenge
Scenario
“Although SOA Addresses the integration challenge, one of the problems for an enterprise is managing service mediation and ensuring effective reusability of services.”
We Need to implement integration technologies such as Oracle SOA Suite and Oracle Service Bus to enable our implementation of SOA.

12. Service Sprawl Service Service Service Service Application Application

13. The Solution

14. Introducing Oracle Service Bus (OSB)
Application
Application
Application
Application

15. Key Features of an Oracle Service Bus
Stateless messaging platform
Supports multiprotocol messaging
Enables location transparency
Handles dynamic routing
Enables message transformation
Enables service composition
Supports message enrichment
Provides service security
Implements service-level agreements

16. Multi-communications
OSB as a Message Broker
Service Clients
Enterprise Services
Oracle Service Bus
HTTP/SOAP
WS-RM
Service A
Client A
Message brokering
JMS
TUX
Multi-protocol
Messaging
Client B
FTP MQ
Service B
WS processing
REST
EJB
Client C
File
Multi-communications
Paradigms
JCA
Service C

17. Location Transparency
Host A
SOAP
Service Bus
SOAP
New-Hire Process
Initialise benefits service
Route to Host B
Host B
Initialise benefits service
OSB can be used to isolate service location changes.

18. Dynamic Routing
SOAP
Service Bus
SOAP
New Employee service
HR Portal
Title
= Manager ?
Transform
New Manager service
Dynamic routing involves defining and configuring business rules Based on changes to business rules of existing IT systems.

19. Transform messages to match the format of a service.
Transformations
SOAP
Service Bus
SOAP
Payroll Service
Expense
Reimbursement
Process
Transform
FTP
Submit Expense
Report Service
Transform
Inventory
Management
App
JMS
SOAP
Transform
Check Order Status
Service
Transform messages to match the format of a service.

20. Service Composition Combining existing services to make new services.
SOAP
Service Bus
SOAP
Account Validation Service
Purchase
Order
Process
Validate
Order
Service 1
Check Price Service 2 3
Check Inventory
Service 4
Combining existing services to make new services.

21. Message Enrichment
… <Customer History> …
Service Bus
Rate Quote
Service
New-Hire Process
Call
Service
Transform
Message
Get Customer
History Service
OSB enables message enrichment by inserting additional
required information into an incoming message.

22. Service-Level Agreements
SLAs define the quality of service to be expected from services.
Administrators can configure alerts for SLA rule violations
The Administrator can configure multiple levels of severity for an alert.

23. OSB Architecture

24. Oracle WebLogic Server
OSB Architecture
Oracle Service Bus
Eclipse
Oracle WebLogic Server
Oracle JRockit JDK

25. Summary
The Problem
The Solution: SOA
Core Concepts of OSB
Role and Features of OSB
Architecture of OSB
Any Questions?