Hi,

hopefully it answers the question of Byung.

https://forum.camunda.org/t/versioning-java-delegates/2464/6

Regards,

[Logo Orange]

Łukasz Rajewski, R&D Expert
Orange Labs Polska, Virtual Programmable Infrastructure Skill center
Mob.: +48 604307879
Orange Polska, Obrzeżna 7, 02-691 Warszawa
www.orange.pl<http://www.orange.pl/>

From: Seshu m <[email protected]>
Sent: Monday, March 29, 2021 6:34 PM
To: Byung-Woo Jun <[email protected]>; lukasz.grech 
<[email protected]>; onap-discuss <[email protected]>; Rajewski 
Łukasz - Hurt <[email protected]>
Subject: RE: Custom workflow Versioning Support Re: About ONAP SO custom 
workflow orchestration feature in Istanbul...

Adding in lukasz from orange.
We got an initial code from our friends of Nokia and we dev on top of that.
The way it works is camunda is deployed directly on top of the tomcat as a war.
 There have been changes in the bpmn infra to convert it from the springboot 
application to a tomcat based application.
I can explain you that code. If you are interested to know more.
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Lead Architect,
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Huawei Technologies India Pvt. Ltd.
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From:Byung-Woo Jun <[email protected]<mailto:[email protected]>>
To:Seshu m 
<[email protected]<mailto:[email protected]>>;lukasz.grech 
<[email protected]<mailto:[email protected]>>
Date:2021-03-29 20:26:05
Subject:Custom workflow Versioning Support Re: About ONAP SO custom workflow 
orchestration feature in Istanbul...

Hi Seshu,

I'd like to discuss this further with you and Lukasz from Orange for SO custom 
workflow.

For the versioning, when we deploy the WAR file (workflow + Java business 
logic) to TomCat/Camunda, they used to have issues as follows:

  *   For workflows, Camunda create new version of the workflows instances 
(e.g., x.bpmn with version 1, x.bpmn with version 2). The version number is 
generated by Camunda, and Camunda can handle multiple workflow instances this 
way.
  *   However, for the Java classes, how did you resolve? For example, x.bpmn 
V1 uses a1.java and x.bpmn V2 uses a2.java fro their service tasks. In this 
case, a1.java instance and a2.java instance need to be coexist. Did Lukasz test 
this scenario?
  *   There have been Java class loading issues unless we use jigsaw or 
something... .I don't know how Camunda handle this???

Thanks.

BR,
Byung


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