Enterprise Service Bus @azilentech #AzilenTechMeetup

Background Information – Key to Success but challenges. Distributed data across different systems Inter organization data dependency Intra organization data dependency Inter organization dependency (Amazon / Flipcart) Intra organization dependency (Google add-sense/ Youtube / Netflix)

EIP-Enterprise Integration Pattern This data dependency needs to be resolved We need a way to make these systems talk to each other And the HERO is EIP EIP-”EIP is a set of re-usable design patterns or solutions which can be used to connect more than two enterprise applications and made them talk to each other and communicate to each other.” P2P, File Transfer, Messaging, RPC, Shared DB etc. are an example of EIPs. P2P is the most widely used EIP.

P2P-Point To Point Integration Two applications talk to each other directly, no intermediary. P2P integration is only suitable for very few integration points and there is no possibility for future expansion. If there are at least three different integration end-points, and many more are on the road map, then P2P integration is certainly not an option. It increases complexity, maintenance and reduces agility and visibility.

What is an ESB ? “An enterprise service bus (ESB) is a software architecture model used for designing and implementing communication between mutually interacting software applications in a service-oriented architecture (SOA).” -Wikipedia In nutshell- The enterprise service bus (ESB) is a software infrastructure or architectural pattern that facilitates application integration. ESB provides implementations of EIPs and abstracts away all the integration complexity of enterprise application integration

Why do we need ESB ? Business applications are rarely live in isolation. Users expect instant access to all business functions an enterprise can offer, which requires different applications to talk to each other. Fragmented application development languages space

Fragmented Protocol Space Fragmented protocol space applications uses to communicate

Here it is!

Advantages of ESB ESB facilitate two or more applications talking to each other via well defined interface. To abstract away complexity (Languages / Protocols) Increased Visibility Provides loose coupling and flexibility Provides reliability, Agility, high productivity Well defined architecture Easy to on board new systems and integrations

Advantages of ESB Easier to migrate legacy systems Scalable/ Manageable/ stateless No matter which technologies you have to use, you always do it the same way, i.e. same syntax, same API, same automatic tests. The only difference is the configuration of each endpoint

Disadvantages of ESB Lots of initial overhead Expertise needs to be built into DevOps teams Not for everybody (some initial understanding or development experience required) Initial learning curve A new technology and system needs to be maintain

Secondary duties of ESB Monitor and control routing of message exchange between services Resolve contention between communicating service components Cater for commodity services like event handling, data transformation and mapping, message and event queuing and sequencing, security or exception handling, protocol conversion and enforcing proper quality of communication service

Complex Event Processing Capabilities of ESB Service Invocation Routing Messaging Complex Event Processing Mediation QoS Management Agnosticism

Capabilities of ESB Security Transformation (xml, csv, json) Enrichment Validation Split and Merge

Different ESB Frameworks There are many different ESB offerings available in both commercial and Open Source license agreement. The widely used open source offerings are as below Apache Camel Mule ESB JBoss Fuse WSO2 ESB Spring Integration

Follows Same Religion

Comparison Criteria

Similarities All these frameworks have many similarities. All implement the EIPs and offer a consistent model The only difference is the configuration of each endpoint Though each framework uses different names, the idea is the same. For instance, “Camel routes“ are equivalent to “Mule flows“, “Camel components“ are called “adapters“ in Spring Integration.

Differences Very few differences between them Community support Tooling DSL (Domain specific languages) Popularity Developer Vs. Designer centric Community size Active community Helping hands What are the tools available ? Are they easy and useful ? Java,scala,xml,Groovy

What to Focus on?

Who uses ESB ?

Million-Dollar Question –When to ESB ? Car pool-When to use car pool ? When use two-wheeler ?

Wrong Usage

Proper Usage

Please Beware ! There is no silver bullet, an ESB can also be the wrong choice. Selecting the right product is essential for your project success.

Case Study-MyCart Order management Bulk Order management Shipping Logistics Customer management Analytics (Roadmap) Marketing Campaign (Roadmap)

Traditional Solution(P2P) Bulk Order Management system Order Management System Logistics system Customer Management System Analytics System Marketing System

Customer Management System Solution Using ESB Order Management System Order Management System Order Management System ESB Customer Management System Analytics System Marketing System

Thank You

Twitter Contest ! Which license does Mule ESB offers to open source community ? Common Public Attribution License (CPAL) @azilentech #AzilenTechMeetup