How to use External Routing in Human Task

Question

Hi,
Could you please help me knowing how to create External Routing in Human Task in SOA Composite.
Thanks

Answer 1

When defining the external routing class in the .task, you can define the name value pairs which you want to pass to the program. Here you can pass dynamic values to the class as well by reading the appropiate node from the payload. In your class the name, value would be available in the "Map propertyBag" parameters in Rajiv's example link.
Document says:
Map of properties — When an assignment service is specified, a list of properties can also be specified to correlate callbacks with backend services that determine the task assignees.Or if you are too lazy to map many parameters and values, you can always read the whole Task task and then use getDocument and some xml reading to determine the values. This Task is the whole document.
API:
http://docs.oracle.com/cd/E17904_01/apirefs.1111/e10660/oracle/bpel/services/workflow/task/model/TaskType.html#getDocument__Document says:
Task document — The task document that is executed by the workflow. The task document contains the payload and other task information like current state, and so on.Also you need to make sure that you are maintaining the state of the assignment class, doc says:
The assignment service class cannot be stateful because every time workflow services need to call the assignment service, it creates a new instance.Thus if you are doing multiple serial assignments one after the another and if your server restarts in between, then the approval would start at the first assignee again. Suppose in Rajiv's doc link e.g., if the task is assigned to 'wfaulk' and the server restarts then the task would be assigned back to 'jstein'. In order to prevent this you need to modify the java code and each time the variable changes it's value you need to place it in a dehydration store. Also on each action over the process you need to reinitialize the variable from that dehydration store.
-Bikash