Use Camunda with external system


I am try to use camunda for workflow management where rest of the business will be in external system, i would like to use the Rest API for this communication.(i gone thorugh external task service in camunda but it doesnt fit my following needs).

a) Retrieve Current node name , its parent node name, and all possible child node names through rest.

b)Retrieve current taks based on processInstance id .



I am not sure if I understood your scenario completely, however I believe that might be helpful:
a) - “Retrieves an Activity Instance (Tree) for a given process instance by id.”
b) Try the following query with processInstanceId parameter.

Best regards,