Why Enterprise Service Bus (ESB)

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Enterprise Service Bus, Service Oriented Architecture, Integration

Text of Why Enterprise Service Bus (ESB)

  • 1. May, 2014

2. Point to Point Architecture Hub and Spoke Architecture Distributed Integration Architecture or Peer to Peer Architecture Service Oriented Architecture 2 3. 3 The original architecture used to support systems integration Advantages : Point to point solutions are often fast and efficient The efficiency is derived from applications being tightly coupled Disadvantages : Complexity increases as applications increase resulting in high maintenance cost Lack of flexibility Tightly coupled nature makes it difficult to manage 4. 4 The earliest formal integration technology. Works on the principle that all information coming from the applications had to be processed within a single machine or server called a hub Advantages : Less complex than Point to Point. Preferred architecture for achieving an easily controlled and managed environment in medium sized integration project. Disadvantages : Too much processing taking place in central hub. Lack of standards Most of the solutions are proprietary hence expensive As the number and complexity of processes increase, performance can suffer and hubs become difficult to manage, maintain and extend Pure Hub and Spoke implementations do not scale well. One solution is to create a federated architecture 5. 5 One solution to the Hub and Spoke scalability issue is to perform message translation, routing, splitting and combing closer to the source and target systems by using smaller computers known as agents. Agent computers are connected to just one system and reduce the processing load on that system. Also known as Peer to Peer architecture. Advantages : Distributed work load Gain in processing efficiency Ability to scale well Disadvantages : Early attempts at Distributed Architecture would work only where the internal and external facilities operated under the same distributed technology (CORBA, COM, JMI). Not so effective where Line Of Business involves mergers and acquisition. 6. 6 Service Oriented Architecture is essentially an enhanced version of Distributed Architecture that uses loosely coupled software services to support the requirements of business processes and software users. Advantages : Web services as the communication standard. Loosely coupled, granular Interoperability Efficiency Because of Reusable nature Scalable Reliable Secure Maintainable ESB has become the accepted standard for the creation of an organizations Service oriented architecture. 7. ESB - An attempt to move away from problems caused by brokered hub and spoke EAI approach. Bus architecture lessens the burden of functionality placed on the single hub by distributing the integration tasks to other part of the networks. The granular loosely coupled components can be grouped in various configurations to handle different integration scenario. Can be hosted anywhere within the infrastructure or duplicated for scalability. Componentize necessary functionalities like security, transaction processing, error handling 7 8. There are a number of different ESB products available on the market today. Some, such as WebSphere Message Broker or TIBCO Business Works, are traditional EAI products that have been re-factored to offer ESB-like functionality, but still function in a broker-like manner. Core features Location transparency Transformation usable formats for all consumers Protocol conversion Accept all protocols for consumption Routing determine appropriate end consumer based on preconfigured rules or dynamic created requests. Monitoring/Administration Security ESB security involves tow main components Ensure secure handing of messages Ensure secure transport of messages 8 9. Lightweight: because an ESB is made up of many interoperating services, rather than a single hub that contains every possible service, ESBs can be as heavy or light as an organization needs them to be, making them the most efficient integration solution available. Easy to expand: If an organization knows that they will need to connect additional applications or systems to their architecture in the future, an ESB allows them to integrate their systems right away, instead of worrying about whether or not a new system will not work with their existing infrastructure. When the new application is ready, all they need to do to get it working with the rest of their infrastructure is hook it up to the bus. Scalable and Distributable: Unlike broker architectures, ESB functionality can easily be dispersed across a geographically distributed network as needed. Additionally, because individual components are used to offer each feature, it is much simpler and cost-effective to ensure high availability and scalability for critical parts of the architecture when using an ESB solution. SOA-Friendly: ESBs are built with Service Oriented Architecture in mind. This means that an organization seeking to migrate towards an SOA can do so incrementally, continuing to use their existing systems while plugging in re-usable services as they implement them. Incremental Adoption: At first glance, the number of features offered by the best ESBs can seem intimidating. However, it's best to think of the ESB as an integration "platform", of which you only need to use the components that meet your current integration needs. The large number of modular components offers unrivaled flexibility that allows incremental adoption of an integration architecture as the resources become available, while guaranteeing that unexpected needs in the future will not prevent ROI. 9 10. Hybrid Integration is the concept of federated on-premises and cloud-based integration combined with the improved interoperability of existing and new middleware silos of application, business-to-business (B2B), business process management (BPM), business events, business rules, and data integration. Key capabilities of hybrid integration platforms include metadata life-cycle management and runtime interoperability, which help CIOs orchestrate a well-governed but also rapidly changing agile integration platform from multiple integration products. -Forrester 10 11. Next Steps Questions ? Presenter Contact Info: V.T.R. Ravi Kumar 12. THANK YOU


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