Mule ESB Fundamentals Enterprise Service Bus

1. Mule ESB
Fundamentals
By: Naresh Chintalcheru

2. ESB Market
Commercial ESB Products:
● IBM Websphere ESB
● Tibco ActiveMatrix ESB
● Oracle ESB
● Sonic ESB
● Microsoft BizTalk Server

3. ESB Market
Open Source ESB Products:
● Mule ESB
● Apache ServiceMix
● JBoss ESB
● WSO2 ESB

4. ESB Market
Overlapping ESB Functionality:
● IBM
● Websphere ESB
● Websphere Message Broker
● Websphere Data Power
● Apache
● Apache Service Mix
● Apache Synapse

5. ESB
What is ESB ?
Enterprise Service Bus is a modular and
component based architecture model used
for designing and implementing the
interaction and communication between
mutually interacting software applications in
SOA - Wikipedia

6. SOA
What is SOA ?
Service Oriented Architecture is a set of
principles and methodologies to design and
develop well-defined business functionalities
that are built as software components that
can be reused - Wikipedia

7. In-short SOA & ESB
SOA:
● Design & develop smaller software components
as services for reusability.
ESB:
● Communication and interaction between
services.

8. In-short SOA & ESB

9. EAI
Traditional EAI products are based on
Hub and Spoke Architecture

10. EAI – Hub & Spoke
Image Source

11. EAI – Hub & Spoke
App - A App – B
(MDB)
MQ

12. ESB
ESB is based on
Bus Architecture

13. Bus Architecture
Image Source

14. ESB
Image Source

15. ESB Principles
ESB principles are
● Mediation
● Routing
● Transformation
● Orchestration
● Conversion

16. Application Layers
Enterprise Application
Business Logic
vs
Connectivity Logic

17. Abstraction
Abstracting Connectivity Logic out of Applications
● IMS transactions using adapters
● Cobol copybooks and call Mainframe Stored
Procedures
● CICS Transactions
● SMTP, FTP, EJB, JMS

18. Mule ESB
Understanding
Mule ESB

19. Mule Studio
Mule ESB Runtime:
Runtime Mule Server (Standalone/Embedded)
Mule Studio:
Integrated Development Environment to develop
Mule Flows.
Eclipse with Mule ESB Plugin:
Integrated Development Environment to develop
Mule Flows.

20. Mule ESB
Mule ESB Flows

21. Mule ESB
Mule ESB Flows:
Flows are sequences of message-processing
events.
Image Source

22. Mule ESB
Flow Building Blocks

23. Mule ESB
Flow Building Blocks
● Message Source
● Message Processors

24. Mule ESB
Message Source:
The first building block in most Flows is a
Message Source, which receives messages
from one or more external sources, thus
triggering a Flow instance

25. Mule ESB
Message Processors:
Pre-packaged units of functionality that process
messages.
Except for Message Sources, all the building blocks
in a Flow qualify as Message Processors.

26. Mule ESB
Message Processors Building Blocks

27. Mule ESB
Message Processors Building Blocks Groups
● Endpoints
● Scopes
● Components
● Transformers
● Filters
● Flow Controls
● Error handlers

28. Mule ESB
Message Processors Building Blocks Groups
● Endpoints
An endpoint in Mule is a channel for receiving or sending
data. An endpoint has a specific protocol, such as HTTP or
JMS
● Scopes
Scopes are processing blocks. e.g., Async, sun-flows, poll
● Components
Studio building blocks known as Components fall into three
categories: General, Script, and Web Service

29. Mule ESB
Message Processors Building Blocks
● Transformers
XML-to-JSON
● Filters
Filters determine whether a message can proceed through an
application
● Flow Controls
Route messages to various destinations in a Mule flow
● Error handlers

30. Mule ESB
Flow with Building Blocks
Image Source

31. Mule ESB
Flow in Mule Studio

32. Mule ESB
Fork/Join Control Flows
Fan-In/Fan-out

33. Mule ESB
Mule Flow Fork/Join
Fan-In / Fan-out – Fork/Join
Mule Flow Controls
Collection Splitter & Collection Aggregator

34. Mule Transactions
Mule Transactions

35. Mule Transactions
Mule Flow Transactions
● Mule Transaction Manager
● Mule can run both XA/Non-XA Transactions
● Join a existing transaction or Create new
● Uses Spring Framework Transactions Module
● Can be plugged with App Server Transaction manager
(Mule Embedded)

36. Mule Security
Mule Security

37. Mule Security
Mule Flow Security
● Mule Security Manager
● Mule Security APIs
● Pluggable Security Manager
● Spring Security

38. Resource References
http://blogs.mulesoft.org/esb-or-not-to-esb-revisited-%E2%80%93-part/
http://blogs.mulesoft.org/esb-or-not-to-esb-revisited-part-1/
http://www.mulesoft.com/resources/esb/enterprise-application-integration-eai-and-esb
http://www.innovativearchitects.com/KnowledgeCenter/ESB-EAI-SOA.aspx

39. Thank You
and
Feedback Appreciated