MuleSoft.U Development Fundamentals (Mule 4)

Overview

Module 11

Writing DataWeave Transformations

Quiz

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Refer to the exhibit. An event payload contains an unordered array of flight objects, where every object has a price key and a toAirport key.

What is valid DataWeave code to return flights with price under 500, grouped by toAirport in ascending order, with the lowest price first?

payload groupBy $.toAirport filter $.price < 500 orderBy $.price
payload groupBy $.toAirport filter $.price > 500 orderBy $.price
payload filter $.price < 500 orderBy $.price groupBy $.toAirport
payload filter $.price > 500 orderBy $.price groupBy $.toAirport
Correct!
Refer to the exhibit. What is valid DataWeave code to transform the input JSON payload to the output XML payload?

Answers

A.

B.

C.

D.

A
B
C
D
Sorry, that's incorrect.
A Mule application has a main flow and a combineNames flow. In the main flow, a variable named fullName is set to the object {firstName: "Max", lastName: "Mule"}.

What is valid DataWeave code to call the combineNames flow with the input object stored in the fullName variable?
#[ dw::Flow::lookup( "combineNames", vars.fullName ) ]
#[ dw::Runtime::lookup( "combineNames", vars.fullName ) ]
#[ lookup( "combineNames", vars.fullName ) ]
#[ combineNames( vars.fullName ) ]
#[ lookup( combineNames( vars.fullName ) ) ]
Sorry, that's incorrect.
What DataWeave 2.0 type can be used as input to a map operation?
Array
Object
Map
String
Key
Sorry, that's incorrect.
What is the correct way to format the decimal 20.3844 as a string to two decimal places?
20.3844 as String {format: ".0#"}
20.3844 as :string {format: ".0#"}
20.3844 as String as format: ".0#"
20.3844 as :string as format: ".0#"
20.3844 as String (format = ".0#")
20.3844 as :string (format = ".0#")
Sorry, that's incorrect.

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Course Overview
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INTRODUCING THE COURSE
- Introducing the course (1:42)
- WT: Set up your computer (12:46)
- WT: Set up your computer
- Introducing the course use case (3:14)
INTRODUCING APPLICATION NETWORKS AND API-LED CONNECTIVITY
- Intro (3:12)
- Introducing a new IT operating model (6:54)
- Achieving an application network (2:41)
- Deconstructing APIs and RESTful APIs (5:02)
- WT 1-1 intro (0:15)
- WT 1-1: Explore an API directory and an API portal
- Calling RESTful web services (1:17)
- WT 1-2 intro (0:25)
- WT 1-2: Make calls to an API
- Successfully creating application networks using API-led connectivity (2:12)
- Summary (0:38)
- Module 1 quiz
INTRODUCING ANYPOINT PLATFORM
- Intro (0:30)
- Introducing Anypoint Platform (4:24)
- Introducing the components of Anypoint Platform (3:30)
- WT 2-1 intro (0:12)
- WT 2-1: Explore Anypoint Platform and Anypoint Exchange
- Building integration applications and APIs with Design Center (2:05)
- Creating integration applications with Flow Designer (1:15)
- WT 2-2 intro (0:13)
- WT 2-2: Create a Mule application with Flow Designer
- Accessing, querying, and transforming data (1:14)
- WT 2-3 intro (0:10)
- WT 2-3: Create an integration application with Flow Designer that consumes an API
- Summary (0:48)
- Module 2 quiz
DESIGNING APIS
- Intro (1:09)
- Introducing RAML and using API Designer to define APIs with RAML (2:34)
- WT 3-1 intro (0:08)
- WT 3-1: Use API Designer to define an API with RAML
- Testing API design without writing code (0:28)
- WT 3-2 intro (0:09)
- WT 3-2: Use the mocking service to test an API
- Using RAML to define specifications for requests and responses (1:45)
- WT 3-3 intro (0:15)
- WT 3-3: Add request and response details
- Engaging with users (0:47)
- WT 3-4 intro (0:14)
- WT 3-4: Add an API to Anypoint Exchange
- Sharing APIs (0:39)
- WT 3-5 intro (0:09)
- WT 3-5: Share an API
- Summary (0:41)
- Module 3 quiz
- DIY 3-1: Create an API specification with RAML
BUILDING APIS
- Intro (0:47)
- Creating Mule applications with Anypoint Studio (4:45)
- WT 4-1 intro (0:15)
- WT 4-1: Create a Mule application with Anypoint Studio
- Connecting to data (1:14)
- WT 4-2 intro (0:28)
- WT 4-2: Connect to data (MySQL database)
- Transforming data (0:27)
- WT 4-3 intro (0:28)
- WT 4-3: Transform data
- Creating RESTful interfaces manually for Mule applications (0:28)
- WT 4-4 intro (0:12)
- WT 4-4: Create a RESTful interface for a Mule application
- Generating RESTful interfaces automatically using APIkit (0:44)
- WT 4-5 intro (0:13)
- WT 4-5: Use Anypoint Studio to create a RESTful API interface from a RAML file
- Connecting interfaces to implementations (0:31)
- WT 4-6 intro (0:15)
- WT 4-6: Implement a RESTful web service
- Synchronizing changes to API specs between Studio and Anypoint Platform
- WT 4-7: Synchronize changes to an API spec between Studio and Anypoint Platform
- Summary (0:43)
- Module 4 quiz
- DIY 4-1: Implement a REST API using APIkit
DEPLOYING AND MANAGING APIS
- Intro (0:48)
- Introducing deployment options (1:17)
- Deploying applications to CloudHub (0:45)
- WT 5-1 intro (0:13)
- WT 5-1: Deploy an application to CloudHub
- Creating API proxies (0:53)
- WT 5-2 intro (0:23)
- WT 5-2: Create and deploy an API proxy
- Restricting access to APIs (1:02)
- WT 5-3 intro (0:11)
- WT 5-3: Restrict API access with policies and SLAs
- Granting access to APIs (1:03)
- WT 5-4 intro (0:16)
- WT 5-4: Request and grant access to a managed API
- Adding client ID enforcement to API specifications (0:31)
- WT 5-5 intro (0:11)
- WT 5-5: Add client ID enforcement to an API specification
- Summary (0:50)
- Module 5 quiz
- DIY 5-1: Deploy and secure an API
- DIY 5-2: Use an API implementation as its own proxy
ACCESSING AND MODIFYING MULE EVENTS
- Intro (1:45)
- Viewing information about Mule 4 events (2:01)
- WT 6-1 intro (0:15)
- WT 6-1: View event data
- Debugging Mule applications (0:40)
- WT 6-2 intro (0:25)
- WT 6-2: Debug a Mule application
- Tracking event data as it moves in and out of Mule applications (0:25)
- WT 6-3 intro (0:31)
- WT 6-3: Track event data as it moves in and out of a Mule application
- Setting request and response data (1:09)
- WT 6-4 intro (0:14)
- WT 6-4: Set request and response data
- Using DataWeave expressions to read and write event data (3:04)
- WT 6-5 intro (0:17)
- WT 6-5: Get and set event data using DataWeave expressions
- Creating variables (0:22)
- WT 6-6 intro (0:08)
- WT 6-6: Set and get variables
- Summary (0:23)
- Module 6 quiz
- DIY 6-1: Troubleshoot and refactor a Mule application
- DIY WT: Install a Mule application as a Maven dependency
STRUCTURING MULE APPLICATIONS
- Intro (0:49)
- Encapsulating processors into separate flows and subflows (1:46)
- WT 7-1 intro (0:14)
- WT 7-1: Create and reference subflows and private flows
- Passing messages between flows using asynchronous queues (0:53)
- WT 7-2 intro (0:14)
- WT 7-2: Pass messages between flows using the VM connector
- Organizing Mule application files (1:29)
- WT 7-3 intro (0:15)
- WT 7-3: Encapsulate global elements in a separate configuration file
- Organizing and parameterizing application properties (1:29)
- WT 7-4 intro (0:11)
- WT 7-4: Use property placeholders in connectors
- Organizing Mule project files (1:12)
- WT 7-5 intro (0:27)
- WT 7-5: Create a well-organized Mule project
- Managing metadata for a project (1:02)
- WT 7-6 intro (0:09)
- WT 7-6: Manage metadata for a project
- Summary (0:46)
- Module 7 quiz
- DIY 7-1: Track data through a Mule application
- DIY 7-2: Define and use application properties
CONSUMING WEB SERVICES
- Intro (0:43)
- Consuming web services that have an API (and connector) in Exchange (2:03)
- WT 8-1 intro (0:12)
- WT 8-1: Consume a RESTful web service that has an API (and connector) in Exchange
- Consuming RESTful web services (0:39)
- WT 8-2 intro (0:14)
- WT 8-2: Consume a RESTful web service
- Consuming SOAP web services (0:46)
- WT 8-3 intro (0:14)
- WT 8-3: Consume a SOAP web service
- Combining data from multiple services (0:28)
- WT 8-4 intro (0:12)
- WT 8-4: Transform data from multiple services to a canonical format
- Summary (0:22)
- Module 8 quiz
- DIY 8-1: Orchestrate web services
CONTROLLING EVENT FLOW
- Intro (0:44)
- Multicasting events (1:03)
- WT 9-1 intro (0:14)
- WT 9-1: Multicast an event
- Routing events based on conditions (0:22)
- WT 9-2 intro (0:19)
- WT 9-2: Route events based on conditions
- Validating events (0:37)
- WT 9-3 intro (0:13)
- WT 9-3: Validate events
- Summary (0:23)
- Module 9 quiz
- DIY 9-1: Use validators to validate response schemas
HANDLING ERRORS
- Intro (0:58)
- Reviewing the default handling of messaging errors (3:02)
- WT 10-1 intro (0:13)
- WT 10-1: Explore default error handling
- Creating error handlers (4:51)
- Handling errors at the application level (0:34)
- WT 10-2 intro (0:17)
- WT 10-2: Handle errors at the application level
- Handling specific types of errors (1:34)
- WT 10-3 intro (0:14)
- WT 10-3: Handle specific types of errors
- Handling errors at the flow level (2:41)
- WT 10-4 intro (0:19)
- WT 10-4: Handle errors at the flow level
- Handling errors at the processor level (2:56)
- WT 10-5 intro (0:15)
- WT 10-5: Handle errors at the processor level
- Mapping errors to custom error types (0:44)
- WT 10-6 intro (0:10)
- WT 10-6: Map an error to a custom error type
- Reviewing and integrating with APIkit error handling (0:45)
- WT 10-7 intro (0:17)
- WT 10-7: Review and integrate with APIkit error handlers
- Handling system errors (0:41)
- WT 10-8 intro (0:08)
- WT 10-8: Set a reconnection strategy for a connector
- Summary (1:27)
- Module 10 quiz
- DIY 10-1: Handle errors
WRITING DATAWEAVE TRANSFORMATIONS
- Intro (1:01)
- Creating transformations with the Transform Message component (1:21)
- WT 11-1 intro (0:18)
- WT 11-1: Create transformations with the Transform Message component
- Writing DataWeave transformation expressions (1:39)
- Transforming basic data structures (3:24)
- WT 11-2 intro (0:11)
- WT 11-2: Transform basic JSON, Java, and XML data structures
- Transforming complex data structures with arrays (2:19)
- WT 11-3 intro (0:14)
- WT 11-3: Transform complex data structures with arrays
- Transforming complex XML data structures (1:58)
- WT 11-4 intro (0:15)
- WT 11-4: Transform to and from XML with repeated elements
- Defining and using variables and functions (2:18)
- WT 11-5 intro (0:15)
- WT 11-5: Define and use variables and functions
- Formatting and coercing data (1:35)
- WT 11-6 intro (0:08)
- WT 11-6: Coerce and format strings, numbers, and dates
- Using custom data types (0:36)
- WT 11-7 intro (0:09)
- WT 11-7: Define and use custom data types
- Using DataWeave functions (1:35)
- WT 11-8 intro (0:12)
- WT 11-8: Use DataWeave functions
- Looking up data by calling a flow (0:37)
- WT 11-9 intro (0:07)
- WT 11-9: Look up data by calling a flow
- Summary (0:51)
- Module 11 quiz
- DIY 11-1: Write DataWeave transformations
TRIGGERING FLOWS
- Intro (1:28)
- Reading and writing files (1:25)
- WT 12-1 intro (0:12)
- WT 12-1: Trigger a flow when a new file is added to a directory
- Synchronizing data with watermarks and using listeners with automatic watermarking (2:57)
- WT 12-2 intro (0:25)
- WT 12-2: Trigger a flow when a new record is added to a database and use automatic watermarking
- Using manual watermarking and scheduling flows (1:32)
- WT 12-3 intro (1:32)
- WT 12-3: Schedule a flow and use manual watermarking
- Publishing and consuming JMS messages (0:43)
- WT 12-4 intro (0:11)
- WT 12-4: Publish and listen for JMS messages
- Summary (0:28)
- Module 12 quiz
- DIY 12-1: Read and write files using the File, FTP, and Database connectors
- DIY 12-2: Route messages using JMS queues
PROCESSING RECORDS
- Intro (0:36)
- Processing items in a collection with the For Each scope (0:26)
- WT 13-1 intro (0:11)
- WT 13-1: Process items in a collection using the For Each scope
- Processing records with the Batch Job scope (2:48)
- WT 13-2 intro (0:20)
- WT 13-2: Process records using the Batch Job scope
- Using filtering and aggregation in a batch step (0:50)
- WT 13-3 intro (0:22)
- WT 13-3: Use filtering and aggregation in a batch step
- Summary (0:14)
- Module 13 quiz
- DIY 13-1: Create a batch job to process records
WRAPPING UP THE COURSE
- Where to go from here (1:45)
- Get certified! (1:50)
Self-assessment quiz