I have a Camunda engine on a web server which uses variables that are specific to the execution of that process at request time. However, I have Java delegates which make external asynchronous calls and thus may sleep and resume at random times. If I have multiple instances of a process being execu…

Each process instance has its own data scope. To ensure responses from async service invocation get correlated back to the correct process instance you should use the businessKey (if possible, supported by the external system). The businessKey is a special process data used to search and identify pr…

I think the question is if process instances share an instance of a delegate or each process instance has a dedicated instance of a delegate

Hi @Aniruddha_Raje , A process might have finite number of activity types in which you can configure listeners and java delegates. So each activity(UserTask, ServiceTask, etc.) will have own instance of a delegates and listeners. Consider the below example, [image] Lets say in both service tasks…

Across multiple instances of the same process running concurrently, does the same activity, have an instance each of the same delegate? If I have a process Flow P1 with Activity A1 and an attached delegate D1 If I have 10 java threads each instantiating and executing the same Process Flow P1, when…

[image] Aniruddha_Raje: A1 do I have 10 instances of D1 A1 will have 10 instances of D1. Refer this post: [image] How can we create a stateless bpmn service or workflow in camunda ? Please let us know about this Discussion & Questions Hi Kumar, a workflow (i.e., p…

Hey, If i am calling a Service task from different Process, is the Service Task/delegate thread-safe? Please give a look at the given example: Analytic Event Handler.bpmn (2.9 KB) AssetEventHandler.bpmn (2.7 KB) Process Event Handler.bpmn (2.7 KB) In all the three process I am calling the same S…

Hi @satyaram413 , according to this page of the Docs: https://docs.camunda.org/manual/7.14/user-guide/process-engine/delegation-code/#java-delegate a new object instance is created for each delegate invocation. Yes, you can use a single delegate in several processes. More important than the proces…

Hey @Ingo_Richtsmeier , Thanks for your response, If i am trying to get/set process variables inside the delegate class, would that be thread-safe driven?

Thread-Safe Data Management Across Delegates

Camunda 7 Topics Discussion & Questions

aravindhrs February 21, 2020, 12:35pm 6

A1 will have 10 instances of D1.

Refer this post: