Flow Control
Flow control is used when you want to execute certain parts of your code in some situations, while not executing others.
November 27, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Logical Operators
A logical operator is a symbol or word used to connect two or more expressions such that the value of the compound expression produced depends only on that of the original expressions and on the meaning of the operator.
November 27, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Global & Local Variables In DataWeave 2.0
We can create a global variable in the header using var directive. We need to give it a name and we can assign either a constant value or a lambda expression. Global variables can be referenced by their name from anywhere in the body of the DataWeave script.
November 27, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Variables in DataWeave 2.0 (Mule 4)
Variables are a way to store values with a given name so they can be later reused from different parts of your code, making the code cleaner and sometimes even more performant as values are calculated once.
November 27, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Custom Metadata Selector (.^myCustomMetadata)
The following example uses userName.^myCustomMetadata to return the value of custom metadata that is defined as a variable (named userName) in the header of the script as a DataWeave script.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Raw Metadata Selector (.^raw)
The following example uses the Set Payload component (set-payload) to produce a binary value, then uses the Transform Message component (ee:transform) component to return raw data for the MD5 (MD5(payload.^raw)) of the binary value.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments
MIME Type Metadata Selector (.^mimeType)
In the following Mule app flow, the Loggers use payload.^mimeType to select a string “my string”, then to select a string that is set within an fx expression (#[“my string as String type” as String]) in the Set Payload (set-payload) component.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Media Type Metadata Selector (.^mediaType)
Returns the MIME type of a value that includes parameters (for example, application/json;charset=UTF-16). The expression in the value of { “myMediaType” : payload.^mediaType } might return “myMediaType”: “/; charset=UTF-8” for an input POJO.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Encoding Metadata Selector (.^encoding)
In the following Mule app flow, the Logger uses payload.^encoding to select the encoding of “my string”`set in the Set Payload (`set-payload) component.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments
Class Metadata Selector (.^class)
Returns the class of the Plain Old Java Object (POJO). The value might result from calling a method in a Java class or have a data type (such as String or DateTime) that DataWeave treats as a Java value.
November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments