Mule for each scope headerc ollection
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The document discusses using a foreach scope to process a list of values passed as a query parameter in a URL. It describes how a Java component can convert a comma-separated string of query parameter values into a list, which can then be iterated over using a foreach scope. The flow listens on an HTTP listener, uses the Java component to convert the query parameter to a list, and then processes that list with a foreach scope to output each value individually.
Mule for each scope headerc ollection
- 1. Mule For Each Scope – Header Collection
- 2. • In this slide deck we will see how Foreach processes a collection in message header
- 3. Message Header Collection Let us write a Mule flow which listens on HTTP Listener and let us test the flow with below url having a list of query params http://localhost:8081/foreach-headertest?names=Ram,Amar,Nag The value of the query parmater “names” is a list of comma separated values. We want to process this list using Foreach scope
- 4. • Mule HTTP Listener converts query parameters into a Map. We can access these query parameters using the key ‘http.query.params’ • In our case the query parameter is a comma seperated values • We need to convert the comma seperated values to a List, then we can apply Foreach scope. For this purpose we nee to write a Java component
- 5. The Java component which converts comma seperated values to a List We use this Java component in our flow to convert query parameters to a List
- 6. Flow: We used Java component ‘QueryParamsToList’ immediately after HTTP Listener to convert query parmas to a List. Output: