presentation- esb

Upload: pooja-ranganathan

Post on 06-Apr-2018




1 download

Embed Size (px)


  • 8/3/2019 Presentation- Esb



  • 8/3/2019 Presentation- Esb


    Goals Introduction to Enterprise Service Bus (ESB)

    What is an ESB ?

    Evolution of ESB

    Features Of ESB

    Role of ESB in Services Oriented Architecture

    (SOA)Key Advantages & Disadvantages Of ESB

  • 8/3/2019 Presentation- Esb


    Step to Understanding ESB Concept

    Review Key SOA terms and Concept

    Enterprise Service Bus Description

    Definition And Scope of ESB How ESB Software Works

    Key Characteristic and Benefits SOA Without ESB

    SOA With ESB ESB Value Proposition

    Role of ESB

  • 8/3/2019 Presentation- Esb


    WHAT IS ESB ?y Enterprise Service Bus is the Methodology to provide the

    Integration to the different Services. Here Services means any

    component which is providing some functionality to the

    Clients. ESB provides the Base for all those Services to interact

    with each other.

    y An enterprise service bus (ESB) is a pattern of middleware that

    unifies and connects services, applications and resources within

    a business. Put another way, it is the framework within whichthe capabilities of a business' applications are made available

    for reuse by other applications throughout the organization and


  • 8/3/2019 Presentation- Esb


    Definitions And Scope Of ESB

    y In computing, an enterprise service bus (ESB) consists of a softwarearchitecture construct which provides fundamental services forcomplex architectures via an event-driven and standards -basedmessaging-engine (the bus). Developers typically implement an ESB

    using technologies found in a category of middleware infrastructureproducts, usually based on recognized standards.

    y An ESB generally provides an abstraction layer on top of animplementation of an enterprise messaging system , whichallows integration architects to exploit the value of messaging

    without writing code. Unlike the more classical enterpriseapplication integration (EAI) approach of a monolithic stack in ahub and spoke architecture, an enterprise service bus builds onbase functions broken up into their constituent parts, withdistributed deployment where needed, working in harmony asnecessary.

  • 8/3/2019 Presentation- Esb


    Service Oriented Architecture (SOA)Definition Of Some Key Terms

    . A Service?A Repeatable

    Customer Task For Exp CheckCustomer Credit ; Open aNew Account;

    .Service Oriented Architecture (SOA) ?

    An IT

    Architectural Style ThatSupports ServiceOrientation.

    .Service Orientation?

    A Way of

    Integrating Your Business AsLinked Services And TheOutcomes That They Bring.

    .A CompositionApplication ?

    A Set Of RelatedAnd Integrated ServiceThat Support A BusinessProcess Built On AnSOA.

  • 8/3/2019 Presentation- Esb


    Basic SOA

  • 8/3/2019 Presentation- Esb


    What is an Enterprise Service Bus?An Enterprise Service Bus(ESB) isan Flexible Connectivity Infrastructure

    for Integrating Application And Services.

    An ESB Powers Your SOA By Reducing the Number, Size And Complexityo f Interface.

    An ESB Performs Following Between

    Requestor And Service

    Routing Messages BetweenService.

    Converting TransportProtocols Between Request

    And Service Transforming Message

    Formats Between RequestorAnd Service

    Handling Business EventsFrom Disparate Source.

  • 8/3/2019 Presentation- Esb


    Leverage the SOA Reference Architecture

    Interaction Services Information

    Partner Services Business App Services Access Services





    Infrastructure Services

    Enables collaboration

    between people, processes &


    Manages diverse data and

    content in a unified


    Connect with trading


    Build on a robust,

    scaleable, and secure

    services environment

    Facilitate interactions with

    existing information and

    application assets


    environmentfor design and

    creation of

    solution assets

    Manage andsecure


    applications &


    Optimizes throughput, availability and utilization



    Process Services

    Business ServicesSupports enterprise business process andgoals through businesses functional service

    Enterprise Service Bus

    Orchestrate and automate

    business processes

  • 8/3/2019 Presentation- Esb


    Interaction Services Information Services

    Partner Services Business App Services Access Services





    Infrastructure Services

    Enables collaboration

    between people, processes &


    Manages diverse data and

    content in a unified


    Connect with trading


    Build on a robust,

    scaleable, and secure

    services environment

    Facilitate interactions with

    existing information and

    application assets



    for design and

    creation of

    solution assets

    Manage and



    applications &


    Optimizes throughput, availability and utilization




    Process Services

    Business ServicesSupports enterprise business process and

    goals through businesses functional service

    Enterprise Service Bus

    Orchestrate and automate

    business processes

    Supporting Products


    WebSphereData Power


    Registry &Repository




  • 8/3/2019 Presentation- Esb


    EVOLUTION OF ESBy Enterprise Service Bus concept started off life in the mid

    90s it was as an extension of a messaging pipe - that is,message based communications.

    y ESB concepts emerged majorly in 1996-97y Standards activity in the integration marketplace increased

    and took root, and users wanted to find ways to lower theentry price for integration - having to buy a hub was veryexpensive, particularly when connections were few in theearly stages of integration development. There were alsofairly groundless concerns about availability with the huband spoke model due to the perceived single point offailure. As a result, the ESB emerged

  • 8/3/2019 Presentation- Esb


    FEATURES OF ESBy Invocation - support for synchronous and asynchronous transport protocols,

    service mapping (locating and binding).

    y Routing - addressability, static/deterministic routing, content-based routing,

    rules-based routing, policy-based routing.y Mediation - adapters, protocol transformation, service mapping.

    y Messaging - message-processing, message transformation and messageenhancement.

    y Process choreography - implementation of complex business processes

    y Service orchestration - coordination of multiple implementation services

    exposed as a single, aggregate service.

    y Complex event processing - event-interpretation, correlation, pattern-matching.

    y Management - monitoring, audit, logging, metering, admin console.

  • 8/3/2019 Presentation- Esb


    Inaddition,an ESB is expected to exhibit thefollowing

    characteristics:y general use of XML as the standard communication language

    y support for web-services standards

    y validation against schemas for sending and receiving messages

    y the ability to apply business rules uniformly

    y enriching messages from other sources

    y the splitting and combining of multiple messages and the

    handling of exceptions

    y the provision of a unified abstraction across multiple layers

    y queuing, holding messages if applications temporarily become


  • 8/3/2019 Presentation- Esb


    ROLE OF ESB IN SOAy SOA is a service oriented Architecture, means we are developing

    the business logic as a service to finish small task.

    y SOA is a way of architecting your IT programs around a service-oriented concept

    y The absolute key to this is that an SOA service relates to aBUSINESS piece of functionality as opposed to someprogramming activity


    Therefore, it is clear to see that SOA requires some sort ofcommunications capability, and while this does not have to be anESB, the ESB fits the role very well particularly with its affinity tostandards such as web services.

  • 8/3/2019 Presentation- Esb


    ROLE OF ESB IN SOAyAn ESB does not itself implement a service-oriented

    architecture (SOA) but provides the features with

    which one may implement such.y ESBs attempt to isolate the coupling between the

    service called and the transport medium. Most ESBproviders incorporate SOA principles and allow for

    independent message formats.yAnd ESB is not essential for a SOA, but it is very


  • 8/3/2019 Presentation- Esb


    SOA Without ESBDecouples Interface FromApplication

    Rich BusinessAbstractive

    Describe the

    Application Interface

    Decouples the

    Interface From

    The BusinessApplication

    The Number AndComplexity Of

    The Interface

    Is Reduced


    And Other

    Interface BecomeReusable.

    But Interfaces Tightly Coupled With Point To Point Connection

  • 8/3/2019 Presentation- Esb


    SOA With ESBDecouple Interface From Point To Point Connections

    Decouples The PointTo Point Connection

    From The Interface.

    Allows For DynamicSelection

    Substitution AndMatching

    Enable More FlexibleCoupling And

    Decoupling Of TheApplications.

    Enables You To FindBoth The Application

    And The InterfaceFor Reuse.

    ResultGreat Business Responsiveness

  • 8/3/2019 Presentation- Esb


    BENEFITS OF ESBy Today's fast-paced business world demands the ability to

    change and adapt rapidly. An enterprise service bus can enable

    you to integrate your business applications and processes

    quickly and easily, allowing you to respond to business

    challenges and opportunities as soon as they arise.

    y The ESB pattern can improve operational performance and

    reduce costs while simplifying the task of connecting dissimilar

    applications across a network of different operating systems.

  • 8/3/2019 Presentation- Esb


    BENEFITS OF ESBy An enterprise service bus (ESB) enables a business to make

    use of a comprehensive, flexible and consistent approach tointegration while also reducing the complexity of the

    applications being integrated. Due to the complex andvarying nature of business needs, ESB is an evolutionalprogression that unifies message oriented, event driven andservice oriented approaches for integrating applicationsand service. Implementing an ESB facilitates greater reuseof IT assets by separating application logics and integration

    tasks, so you can reduce the number, size, and complexityof integration interfaces. In doing so, you can add orchange services with minimal interruption to existing ITenvironment; reduce cost and risk involved as businesschanges and new opportunities arise.

  • 8/3/2019 Presentation- Esb


    BENEFITS OF ESBy The benefit of an ESB is that it eases the process of creating an


    y Within the boundaries of an ESB, support for multiple

    protocols and data transformation enables heterogeneous

    services to behave as if they were homogeneousy The support for reliable and secure messaging and queuing is

    also available through straight-forward configuration rather

    than coding

    yAdd in the availability of logging and access control forgovernance and ESB can be a very useful tool indeed

  • 8/3/2019 Presentation- Esb


    BENEFITS OF ESBy Faster and cheaper accommodation of existing systems.

    y Increased flexibility; easier to change as requirements change.


    y Scales from point-solutions to enterprise-wide deployment

    (distributed bus).

    y Predefined ready-for-use service types.

    yMore configuration rather than integration coding.

    y No central rules-engine, no central broker.

    y Incremental patching with zero down-time; enterprise becomes


  • 8/3/2019 Presentation- Esb


    All customer services communicate in the same way with the ESB: the ESB

    translates a message to the correct message type and sends the message to the

    correct producer service.

  • 8/3/2019 Presentation- Esb


    Potential IT Benefits:y

    Create additional value from existing applications andinformation

    y Quickly add best-of-breed applications

    y Reduce the total cost of ownership through a standards based

    service-oriented architecture (SOA)y Quickly respond to changing value-chain requirements

    y Leverage existing assets in new ways

    y Simplify complex programming tasks

    yReduce software development and maintenance cost

    y Improve system security, scalability, availability and robustness

  • 8/3/2019 Presentation- Esb


    Potential Business Benefits :y

    Improve customer service and business agilityy Lower operating costs

    y Access real time business information accurately and rapidly

    y Accelerate mergers and acquisitions

    y Lower inventory costsy Improve return on assets

    y Eliminate manual process errors

    y Improve and automate value-chain management

  • 8/3/2019 Presentation- Esb


    The key advantages of using an ESB are less about

    features and functions and more about how you use it.

    y Standardization

    y Loose Coupling

    y Scalability and Reliability

    yRouting and mediation

    y Complex message exchange patterns

  • 8/3/2019 Presentation- Esb


    Key Benefits & Disadvantages Of ESB Advantages OF ESB

    Faster and cheaper accommodation ofexisting systems.

    Increased flexibility; easier to changeas requirements change.


    Scales from point-solutions toenterprise-wide deployment(distributed bus).

    More configuration rather thanintegration coding.

    Incremental Patching with zero down-time; enterprise becomes refactorable

    Disadvantages OF ESB

    Usually requires an Enterprise MessageModel, resulting in additionalmanagement overhead.

    Requires ongoing management of messageversions to ensure the intended benefit ofloose coupling. Incorrect, insuff icient, orincomplete management of messageversions can result in tight couplinginstead of the intended loose coupling.

    It normally requires more hardware thansimple point-to-point messaging.

    Though ESB systems can require asignificant effort to implement, theyproduce no commercial value without thesubsequent development of SOA servicesfor the ESB

    Middleware analysis skills needed toconfigure, manage, and operate an ESB.

  • 8/3/2019 Presentation- Esb


    ESB Value PropositionFocus On Your Core Business Not Your IT

  • 8/3/2019 Presentation- Esb


    Industry analysts confirm multiple

    ESB futureESB Adoption Trends - Gartner

    80% of large companies will have ESBs or similar SOA infrastructure

    products from three or more vendors in 2009. (0.7 probability)

    half of all large companies will apply a systematic, federated approach

    to managing their disparate SOA domains and ESBs in 2009. (0.7probability)

    RoySchulte, Gartner, Succeeding With Multiple SOA Service Domains and Disparate ESBs, May 2007

    ESB Adoption Trends - Forrester

    Some of Forrester's most advanced clients got on the ESB bandwagonyears ago and today find that they have an embarrassment of riches, with

    multiple ESBs. This outcome is almost inevitable for larger enterprises; no

    single ESB today can satisfy all requirements equally well across the

    whole of a large enterprise.

    Larry Fulton, Forrester, Shaping Your Middleware Strategy to Benefit from ESBs, May 2007

  • 8/3/2019 Presentation- Esb







    *******Thank You*******

  • 8/3/2019 Presentation- Esb