I have a process with a CallActivity which I want to loop on a Collection and inject in each child an item.
The start of the process is made with REST API:
uatsitecolls is created on the process instance as a Json object:
But when the CallActivity try to be executed I got:
Any help?
Thanks,
Hi @valiu,
you have to be aware of the fact, that a Multi Instance tasks expects an object of a “Java Collections”-Type as input. Other objects can not be passed to this task. An element of the Java Collections is something like a LinkedList or an ArrayList. So make sure you choose the right data type when using and calling this task.
This is the reason why it is saying “${uatsitecolls} didn’t resolve to type Collection”, because it is not something of a Java Collection, it is a JSON String.
Hope this helps.
Regards
Michael
@valiu take a look at the JSON Spin API Reading JSON | docs.camunda.org. You need to return a collection from the SPIN json.
myJsonVar.elements() would return the collection rather than the SPIN object.
see the following for more detailed explanation:
@MichiDahm When it was stored as type json, its a java object its just not a “collection”, so they have to use the .elements() methods on the JSON SPIN object as per above.
Thank you guys for the info.
Indeed, now I get the Java Collection from the Json object by calling elements() method and the CallActivity artefact can iterate over it.
