The ForEach scope in Mule allows iterating over collections of elements like lists, maps, and message properties to split and process each element individually. It is similar to the for-each loop in Java and handles "java-in, java-out" processing without needing to reaggregate messages like the scatter-gather approach. In the example, a JSON array of student data is converted to a Java object collection using a transformer before being passed to the ForEach scope to process each student separately.

1. For-each Scope

2. Overview
● It is simillar to the for-each present in java, which is used for iterating
purpose over a collection or and array of objects
● It can iterate over elements from any type of collection, including maps, list
even MuleMessageCollecctions
● The ForEach scope can split and proccess collection of elements that are
not part of the message payload, it can also process message property
collection (metadata) from the message header
●
It is necessary to check that only java objects are beinged passed in the
ForEach scope
●
The advantage of using ForEach scope over scatter-aggrigate is that it does
not re-aggrigate the messages in MuleMessageCollection, it will returen the
message in the datatype in which it was sent i.e. the results are always “java-
in.java-out”

3. Example
● Here we will be passing JSON data which contains array of Students
● For the JSON data to be converted into java object we have used JSON-to-Object
transformer

4. JSON data

5. XML of the given flow

6. XML of the given flow