MuleSoft MuleSoft Meetup - Shared Flows

1. São Paulo MuleSoft Meetup Group
Code reusability with Mule Shared Flows

2. 2
● Introductions
● Code reusability with Mule Shared Flows: Concepts
● Reusable Code: Pros and Cons
● Demo - How to implement Mule Shared Flows
● Questions / Comments
Agenda

3. 3
●About me:
○ José Luis Clua (15+ in IT)
○ Company: Capgemini
○ Natural e residente de São josé dos Campos – SP
○ Formado em Ciência da Computação na UNIVAP em 2005
○ 4+ years Integration experience
○ 2+ years with MuleSoft
○ MCD (MuleSoft Certified Developer)
Introductions

4. Code reusability with Mule Shared
Flows

5. 5
What are Flows?
A flow is a pipeline of message processors.
Flows consist of 3 parts:
• Event Source
• Process
• Error Handling
A private flow is a flow that can’t be accessed from
outside the Mule app because it has no source
defined.
A subflow has no Event Source and no Error
Handling scope.
XML FILE
MULE APPLICATION

6. 6
What are Shared Flows?
MULE APPLICATION 1 MULE APPLICATION 2
REPOSITORY
MULE PLUGIN
MULE PLUGIN
Dependency
MULE PLUGIN
Dependency
CTRL + C...
CTRL + V:

7. 7
API LED Connectivity and Shared Flows
EXP
PRC
SYS
MULE-PLUGIN
REPOSITORY

8. 8
● Shared Flows (a.k.a. Common Flows or Global Flows):
○ Flows that we can shared across multiple applications
○ Shared Flows are created in Mule Plugin projects
○ Mule Plugins can host many Shared Flows
○ Mule Plugins can be published in external repositories (Exchange, Jfrog,
Nexus, etc)
○ Mule Plugins can be added as a library (dependency in POM file)
What are Shared Flows?

9. 9
● PROS
○ Code reusability (DRY principle – Don´t Repeat Yourself)
○ Easier maintainability
○ Faster development
○ Saving runtime resources
○ Promote code standards
○ Creating Project Templates
● CONS
○ Can lead to unflexible solutions
○ Demand efficient testing and version control
○ Can create a new layer of complexity
Reusable Code: Pros and Cons

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● Shared Flows are well suited for basic, common, repetitive funtionality such as:
○ Error Handling
○ API health check
○ Logging
○ Caching
○ Data lookup
○ Simple tasks that are repetitive
When use Shared Flows?

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How to manage dependencies?
MULE PLUGIN
MULE APPLICATION 1
DEPENDENCIES
<SCOPE>PROVIDED</SCOPE>
MULE PLUGIN
MULE APPLICATION 2
DEPENDENCIES
MULE PLUGIN

12. Demo

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Shared Flows - Demo
customers-papi
users-papi

14. 14
Shared Flows - Demo

15. Questions / Comments

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● MuleSoft Training:
○ Anypoint Platform Development: Production-Ready Development Practices
(Mule 4)
● MuleSoft Documentation:
○ Flows and Subflows
○ Flow and Subflow scopes
Reference

17. Thank you