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Editorial Team
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Asked: 2026-06-17T19:06:25+00:00

I have a webapp which has user/group functions, and existing user/group data. I want

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I have a webapp which has user/group functions, and existing user/group data.

I want to use Activiti the process engine, however, it seems Activiti manage user/group info itself.

Should I:

  1. Refactor my existing webapp, to reuse the user/group data from Activiti, or
  2. Write some adapter code, to make Activiti reuse user/group data in my existing database? Maybe, another implmentation of RepositoryService, IdentityService, etc., and recompile? It seems RepositionServiceImpl is hard coded in the Activiti sources, and there isn’t a setRepositionService() method in ProcessEngine.

I can’t rename the existing db tables, because there are some other apps using them.

I have read the user guide, but I didn’t found any information on how to integrate Activiti with existing apps.

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  1. Editorial Team

    I don’t know what version you are currently using, but I used your second option successfully with version 5.5, overriding some Activiti classes:

    1. Extend GroupManager and UserManager (from package org.activiti.engine.impl.persistence.entity), and implement the methods you need, using the required DAOs/EntityManager/whatever pointing to your database. Code here: GroupManager / UserManager.

    2. Implement org.activiti.engine.impl.interceptor.SessionFactory.SessionFactory, for groups and users. Check out code here: ActivitiGroupManagerFactory / ActivitiUserManagerFactory.

    3. Finally, in your activity config you have to set your new SessionFactory classes. I was using spring, so there is my activiti-config bean code: activiti-config.xml (check line 14)

    Hope this helps in some way 🙂

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