The document provides an introduction to Mule ESB, covering its core concepts, capabilities, and technologies like SEDA and Java NIO. It explains the processing of XML data through various operations such as validation and transformation, along with details on exception handling strategies. The content is geared towards developers, enterprise architects, and managers with Java knowledge, and promotes a 3-day training for Mule development.

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Introduction to Mule ESB

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Agenda
• What is Mule?
• How do you use Mule?
• What are the core Mule concepts?
• Learning mule with File endpoints

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Enterprise Service Backbone
• Mule is an open-source Enterprise Service Backbone
(ESB)

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Mule – Advanced Technologies
•SEDA
Staged Event-Driven Architecture
•Java NIO
Java New Input/Output

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Mule’s “Moves Things Around”
• Folder to folder
• Queue to queue
• Shared memory to shared memory
• Using different types of transports
• In a flexible way

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XML Pipeline
• An XML pipeline is a series of operation that
are performed on one or more XML files
• Examples include:
– validate
– transform
– prune (remove nodes)
– split (break a single XML file into many files)
– merge (join two or more files together)

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CRV Example
• Flow of XML document through approval
processes
Submit
CRV
Deed
Matched
CRV
SSN
Stripped
CRV
Income
Tax
Audit
County
Audit
County
Approval
State
Audit
State
Approval

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Decomposition
• Example of XML Operations used on CRV
Validate Split
Remove
SSN
Element
Store
Modify
Value
Add
Element
Modify
Value
Add
Element

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Core Mule Concepts
• Mule Manager
• Mule Model
• Universal Message Object (UMO)
• Endpoints
• External Applications

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Universal Message Object (UMO)
• A UMO is a type of Java object that can
– receive events "from anywhere"
– send events
• UMO Components are usually your business objects. They are
components that execute business logic on an incoming event
• UMO are standard JavaBeans (containers)
• There is no Mule-specific code in your components
• Mule handles all routing and transformation of events to and
from your objects based on the configuration of your
component

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Mule Event Flow
• The nine stages of a mule event
– first 2 – inbound
– middle 4 – component
– last 2 – outbound
Endpoint
(Message Receiver)
Endpoint
(Message Dispatcher)
Inbound Router
Outbound Router
Inbound Transformer
Outbound Transformer
Interceptor
Service Invocation
Interceptor
Inbound
Component
Outbound
Optional Step

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Built-in Router Classes
Inbound Outbound Response
Idempotent Receiver Filtering Outbound Router Response Aggregator
Selective Consumer Recipient List
Aggregator Multicasting Router
Resequencer Chaining Router
Forwarding Consumer Message Splitter
Filtering List Message
Splitter
Filtering Xml Message
Splitter
Exception Based Router

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Exception Handling
• Mule has a special way of handling non-happy path processing.
This is called an "Exception Strategy" but is it really just and
exception path and there is very little strategy involved.
• There are three places you can associate an exception strategy
– connector
– component
– model (set for all components in a model)

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Exception Strategy
• We want all invalid documents to be moved into the
error folder.
<exception-strategy
className=org.mule.impl.DefaultComponentExceptionStrategy">
<endpoint address="file:///c:/mule-class/error"/>
</exception-strategy>

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Who will benefit?
Developers, Enterprise Architects and Development Managers having
knowledge in JAVA
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Q & A
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