The document summarizes an event about an Async API and Dataweave Library meetup organized by MuleSoft. It includes an agenda with introductions, an overview of event-driven architecture and asynchronous APIs, use cases, challenges and the future state. It also discusses what a Dataweave library is, its uses, and how to set one up. The meetup covered asynchronous communication patterns, API documentation with AsyncAPI specifications, and included a demo of an asynchronous API use case for an HR application.

1. 17th July, 2022 3:00 PM IST - 4:30 PM IST
Pune MuleSoft Meetup
Async API and Dataweave Library

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● We encourage you to keep your video on for interactive
session.
● You can write down your question in the chat session.
● Once join please write down your name and email id in chat
so that we can have attendance.
● Please provide your valuable feedback. Thanks.
Guidelines

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●About the organizer:
Introductions
● About the Sponsors:
- MuleSoft

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● Anypoint Flex Gateway, Mulesoft RPA, API Governance
● MuleSoft Releases
○ https://docs.mulesoft.com/release-notes/
○ https://www.mulesoft.com/platform/rpa
● MuleSoft Resources
○ https://blogs.mulesoft.com/
○ https://help.mulesoft.com/s/forum
○ https://training.mulesoft.com
● MuleSoft Connect 2022
○ https://connect.mulesoft.com/
Updates

5. Speaker for the day!
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6. Ravi Singh, Kundan Kumar, Anjali Deware
Async API and Dataweave Library

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Agenda
● Introduction Of Async API
- Event Driven Architecture
- Scenarios for Async API
- Use cases
● Dataweave Library
- Introduction
- Use cases and Demo

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Event Driven Architecture
Common problems with Synchronous API
communication
- Mostly API polls do not returns new information
- Tightly coupled services
- Less Flexible
- Failure cascades
- Response time to the customer are slow.

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Event Driven Architecture
- Fire and Forgot: Scenarios where we do not need a
response from server. Such as :
- new user signed up , new follower , empty wallet,
Fraud detection, analytics, workflows notifications
etc.
Concept:
- Message Broker - Kafka, RabbitMQ, Solace etc.

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Event Driven Architecture - Use case

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Event Driven Architecture
Challenges with Event Driven Architecture
- Have existed for decades, promising to deliver powerful,
loosely coupled , highly adaptive and responsive
experiences
- The biggest challenge impeding the widespread adoption
of EDA :
- Visibility: Developers lacks visibility
- Governance: IT team lacks industry standards
- Discovery: Developers need to work with multiple protocols
(JMS, MQTT, AMQP, Kafka, etc)

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What is Async API
● Event-driven API is now supported in Anypoint Platform
through Async API
● Async API is supported by following products in the Anypoint
Platform:

13. What is Async API
● Create/Import Async API specification in API Designer and
edit, document, and publish them
● Publication of specification is done through exchange
● AsyncAPI is a language that describes messaging interfaces
and makes it easy to work with EDA by separating the API in
3 Layers:
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14. Benefits of Async API in Anypoint
Exchange
● Discover the reusable assets easily
● Explore the Event-Driven APIs quickly
● Acquire the right API with limited support
● Include the Event-Driven APIs in the life-cycle
Key takeaways:
Use AsyncAPI specification to document the event-driven
systems to maintain consistency, efficiency, and governance
across different teams
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Use Cases
● Event Notification - Log Aggregator
● Website Tracking
● Stream Processing - Netflix
● Message Reliability
● AI, voice assistant like Alexa

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Async API Specification

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Actual Use Case and Demo
● HR Application

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Async API Limitation
● Cannot import into Anypoint Studio
● Cannot Govern or manage API

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Async API Future State

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Async API Future State

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Async API Future State

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What is DataWeave Library?
● A Reusable extension of DataWeave logic
● Shared through Anypoint Exchange
● Full development lifecycle from designing, testing, and
troubleshooting, to sharing your code.

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What is DataWeave Library?
Some of the use cases are:
● Standard Logging
● Standard Encryption Decryption
● Audit log
Functional:
● Currency conversion

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DataWeave Library - Setup
● What you need?
● Create new Dataweave Project
● Create a new .dwl file
● Run and Debug a DataWeave Library
● Test a DataWeave Library
● Deploy a DataWeave library to Exchange
● Import library into Mule Project

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References
● https://www.asyncapi.com/
● https://knowledgehub.mulesoft.com/
● https://docs.mulesoft.com

26. Questions ?

27. Trivia Quiz !

28. Thank you