How Service Oriented Architecture Improves Business ... · PDF fileXML messages are passed between the requester and service ... Integration D1 - 02 What is SOA.ppt 20 ... 02 What

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How Service Oriented Architecture Improves Business Flexibility

D1 - 02 What is SOA.ppt 2

On Demand Insurance Wants to be an On Demand Business

ODI CIO IBM

How do we build solutions using the on demand operating environment?

We use a technique called Service Oriented Architecture. In general there are four steps. Let’s take a look.

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SOA Step 1 - Componentized Business Design

Business Partner

Elements

Enterprise Applications

Elements

DataElements

People

Calculate credit scoreProcess credit application

Place orderCheck shipping status

Customer recordsBilling dataInventory data

Examples:

� Identify elements of business processes� Functions implemented by applications� Data used by processes� Services provided by systems

� Identify consumers of these elements� People� Other programs


Partner Services

Application Services Data Services

People with Clients

Service Providers and Consumers

� Expose elements as services that can be invoked

� Define clients for people to consume services� Browsers, fat clients, mobile, and others

SOA Step 2 – Expose Elements of Business Processes as Services

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What is a Service?

Service Requester

Service Provider

Service

� A service either provides information to the service requester, or facilitates a change to business data from one valid and consistent state to another

� Web Services Description Language (WSDL) is used to define the service

� Service requesters communicate with services using Extensible Markup Language (XML) messages

� A web service is a specific type of service

� A service is an application function packaged as a reusable component that can be used in a business process


WSDL Provides a Standard Interface

Service Requester

Service Provider

Service

Service Description (WSDL)

Service Description

(WSDL)

� WSDL is an XML document which describes everything a service requester needs to use a service

� Service requester uses WSDL document to bind to the service

� XML messages are passed between the requester and service

� portType - what the service does (list of operations)

� message – description of data used by each operation

� types – data type definitions for messages (usually xsd schemas)

� binding - how the service is invoked (e.g. SOAP/HTTP, SOAP/JMS, etc.)

� port - specifies the address where the service is located

Request (XML)

Response (XML)

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Enterprise Service Bus

Partner Services


People with Clients


� Enterprise Service Bus:� Connects services and service consumers regardless of

location, transport, or organizational boundary� Mediates between service requested and service provided

− Time, rate, format, location, protocol of requests/responses

SOA Step 3 – Connect Services with the Enterprise Service Bus


Service Combining Frameworks

Information Integration

BusinessIntegration

People Integration


Partner Services


People with Clients


Step 4 – Integrate Services Using Service Combining Frameworks

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BusinessIntegration

People Integration


Partner Services


People with Clients


WebSphere MQWBI Message BrokerWeb Services Gateway

WebSphere Portal ServerIBM Workplace WBI Server Foundation

WebSphere Information Integrator

Step 4 – Integrate Services Using Service Combining Frameworks

WebSphere Application Server


� IBM Rational tooling builds web services from existing software assets as well as enterprise resources

� WebSphere Studio Application Developer Integration Edition� Expose software assets as services� Expose enterprise resources as services� Created services have interfaces defined by WSDL� Service interfaces can be bound to invoking requester code

Exposing Elements of Business Processes as Services – A Deeper View

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Service Usage PatternConsuming a Software Component

� Expose the methods in a business process as a service

� An application on another system consumes the service

� Example:� The methods being exposed allows you to add, inquire,

update and delete customer records� The application using this service processes insurance

policies


Partner Services

Application Services

Data Services

People with Clients



Service Usage PatternConsuming a Software Component

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.Net C#

W2K

CICS

zOS

HTTP(S)

COMMAREA

CTG Client

.Net C# Client Drivers

WebSphere Application Server V5.0

WebSphere Edge

eNetworkDispatcher

IBM HTTP Server (SSL)

TCP/IP

CICS Transaction

Gateway

2 IBM x360 4-way Xeon 1.5GHz or

2 IBM p660 4-way Power4 700MHz (p630 4-way Power4 1GHz)

CICS Transaction

Gateway Server

IBM z900 1C3

IBM NetVista M412GHz 786M Ram

HTTP(S)

SOAP SOAP

W2K / AIX

Bank of Montreal: Expose CICS Transactions as Web Services


� Connects service requesters and service providers� Provides mediation services

� Types of mediation� Send and receive messages� Route messages to receiver� Map data formats between sender and receiver� Match protocols between sender and receiver

Connect Services with the Enterprise Service Bus – A Deeper View

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� Service request/response via a messaging interface

� Service requester and provider are not always available at the same time

� Add a message server into the enterprise service bus to mediate between times service requester and provider are available

� Example:� Requesters sends message requesting a quote that is held in a message

queue until the quote server can receive it� Quote server places response in a message queue to hold message until

requester can receive it

Asynchronous Messaging Pattern


Partner Services

Application Services

Data Services

People with Clients


Enterprise Service BusA B

WebSphere MQ

Asynchronous Messaging Pattern

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Integrate Services Using Service Combining Frameworks – A Deeper View

� Process choreography

� Portal

� Collaboration

� Information integration


� A business process is initiated by a request from a client

� This business process consumes multiple services� e.g. – application services, partner services, data services

� A service combining framework performs the choreography of these services, calling them in the proper order, passing and receiving the correct information

� Each of the calls by the process choreographer can be mediated by the enterprise service bus if required

� Asynchronous messaging� Message transformation� Message routing

Process Choreography Pattern

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Partner Services


People with Clients



People Integration


WBI Server Foundation

Process Choreography Pattern


BusinessIntegration


Portal Pattern

� User wishes to interact with multiple applications through an integrated interface� SAP system� CICS Host system� Web application� Claims information database (DB2)� Claims payment database (SQL Server)� Claims adjustment database (DB2 Content Manager)

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GoCustomer Number

Information on History

Window Cracked – Baseball Roof Damaged – Tree fell on it

Customer Update

Claim Form

Home History

Cracked Window 1997Damaged Roof 1996

CICS CustomerUpdate

2

3Columns

RowsSubmit A Claim

Claims InformationClaims History

SAP Customer Lookup

Claims AdjustmentSpecifyFormat:

Select Content:

Creating a Portal “Dashboard”

Claims

Cracked Window - Replaced Damaged Roof - Repaired

Columns

Rows

SpecifyFormat:

Select Content:

GoCustomer Number



Customer Update

Claim Form

Home History


CICS CustomerUpdate

Columns

Rows

Submit A Claim

Claims Information

Claims HistorySAP Customer Lookup

Claims Adjustment

SpecifyFormat:

Select Content:

Claims


2

3

GoCustomer Number



Customer Update

Claim Form

Home History


Claims


CICS CustomerUpdate

Submit A Claim

Claims Information

Claims HistorySAP Customer Lookup

Claims Adjustment


SAPCustomerLookup

CICSCustomer

UpdateSubmitA Claim

ClaimsHistory

ClaimsInformation

ClaimsAdjustment



People Integration


WebSphere Portal Server

Portal Pattern


BusinessIntegration

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Information Integrator Pattern

� Middleware to integrate heterogeneous data sources� A consistent view to all data� Reduces information integration cost

� Example� User accesses all information with one program request

− Customer data (DB2)− Policies (SQL server)− Claims information (XML data)− Claims payment (Other data sources)

� Developer writes a single SQL query to access heterogeneous data sources (DB2, SQL server, XML,…)

� Administrator efficiently works with multiple data sources




People Integration


Information Integrator Pattern

XML DataOther Data

SourcesDB2 SQL

Server


BusinessIntegration

WebSphere Information Integrator

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Conclusion: IBM Delivers a Full SOA Solution

� Tools and adapters to expose elements of business processes as services

� Enterprise Service Bus

� Powerful service combining frameworks� Process choreography� Portal� Collaboration� Information integration


Next Steps

ODI CEO

I see your on demand operating environment is rich in function and implements Service Oriented Architecture. Now show me how it solves my business problems.

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The Future is On Demand

Documents

How Service Oriented Architecture Improves Business ... · PDF fileXML messages are passed between the requester and service ... Integration D1 - 02 What is SOA.ppt 20 ... 02 What