Event based Enterprise Service Bus

Kasun Indrasiri128213M

Supervised by:Dr. Srinath Perera Dr. Sanjiva Weerawarna

Introduction• Increasing adaptation of Service Oriented Architecture(SOA)

for Enterprise Applications.• Enterprise Service Bus(ESB) becomes the de facto integration

solution for most of the Enterprise Integration problems. • Complex Event Processing(CEP) engines also becoming

increasingly popular - high demand for real time processing of moving data.

• This research project is an effort to implement • A light weight Enterprise Service Bus(ESB) based on the Even

Stream Processing Architecture.

Research Context• Service Oriented Architecture (SOA)• A style of software architecture that is modular, distributed and

loosely coupled.• Componentization – The main driver of SOA• Business Functionalities are implemented in different Business

Components• Business Components provide their functionality to its consumers

as a ‘Service’ with the well-defined service interfaces.

Research Context• Enterprise Service Bus (ESB)• An ESB is a middleware solution that enables interoperability among

heterogeneous environments using a service-oriented model.• Stateless and Seamless Integration• Standard Protocols – SOAP, REST, JSON etc.• Transports – HTTP/S, JMS, TCP etc.

Source : http://graegert.com/programming/no-soa-criticism-somewhere

Research Context• Complex Even Processing (CEP)• Real-time processing of an avalanche of moving data• CEP Engine : Evaluates the queries provided from a given user and

match those queries against continuous event streams and trigger an event when the conditions mentioned in the queries are satisfied.

• CEP in action• Reacting to data collected from weather sensors, battlefield control,

traffic control etc.

Siddhi – A CEP Engine• A high performance CEP Engine.• Ability of processing huge flood of events that may go well

over one hundred thousand events per second with a near-zero latency. [1]

Siddhi – A CEP Engine• Faster than Esper [1]

Research Problem and Objectives

• Implementation of a light weight ESB based on Event Streaming Architecture

• Best of both worlds : ESB and CEP• Objectives:• Event Streaming Architecture for an ESB• Mediation Logic based on a Query Language (such as Siddhi)• Use high performance non-blocking IO (Java NIO) for HTTP

transports

Proposed Approach• Implementing an ESB based on top of a CEP engine (Siddhi)

Mediation Language Compiler

Mediation Lnaguage

JMS

HTTP/S

VFS

BusinessAdapters

JMS

HTTP/S

VFS

BusinessAdapters

Input Adapters

TransportListeners

TransportSenders

Output AdaptersMediation Engine

Proposed Approach• Mediation Engine• Based on Siddhi-Core

• Mediation Logic• A new query language for Siddhi.

• Non Blocking Transport Listeners and Senders (HTTP/S)

Scope and Constrains• An ESB caters huge amount of integration requirements• A lightweight ESB with predefine set of requirements• Pass-Thru : ESB purely acts as the bridge between client and

server• Content Based Routing• Non blocking HTTP/S• Basic Message Types – SOAP/REST• Stateless

References

[1] S. Suhothayan, Isuru Loku Narangoda C. Subash, K. Gajasinghe, Srinath Perera, Vishaka Nanayakkara, "Siddhi: A Second Look at Complex Event Processing," in GCE '11, New York, 2011. [2] L. Garc´es-Erice, Building an Enterprise Service Bus for Real-Time SOA: A Messaging Middleware Stack. 33rd Annual IEEE International Computer Software and Applications Conference, 2009.[3] Payam Nabhani, Amir Massoud Bidgoli, Intelligent Conceptual Message Routing in Enterprise Service Bus (ESB). International Conference on Convergence and Hybrid Information Technology, Washington, DC. 2008.

QnA

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