# Extension Of User Task

**URL:** <https://forum.flowable.org/t/extension-of-user-task/1344>\
**Category:** Flowable Engine\
**Created:** [December 18, 2017, 6:47am UTC](https://forum.flowable.org/t/extension-of-user-task/1344 "2017-12-18T06:47:01Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Vzy](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/vzy/32/1158_2.png) [@Vzy](https://forum.flowable.org/u/Vzy)\
**Post date:** [December 18, 2017, 6:47am UTC](https://forum.flowable.org/t/extension-of-user-task/1344/1 "2017-12-18T06:47:01Z")

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Hi,

i am planning to extend existing org.flow.able.bpmn.model.UserTask with my own extra attributes.  
may i know the steps to follow at sever side code and UI designer code changes required.

Thanks,  
Vzy

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**Author:** ![PascalSchumacher](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/pascalschumacher/32/336_2.png) [@PascalSchumacher](https://forum.flowable.org/u/PascalSchumacher)\
**Post date:** [December 18, 2017, 10:43am UTC](https://forum.flowable.org/t/extension-of-user-task/1344/2 "2017-12-18T10:43:10Z")

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I guess this post of mine could helpful (I created a custom service task type):

> [@How to extend Flowable to add "Business Domain" specific BPMN elements](https://forum.flowable.org/t/how-to-extend-flowable-to-add-business-domain-specific-bpmn-elements/679/6):
>
> Thanks for the input. In case anybody is interested: I managed to build a working prototype with a custom “domain specific” BPMN task based on the service task. To achive this I had to fork the following flowable modules: flowable-json-converter (added converter for the custom task, modified existing classes related to service task) flowable-process-validation (is is not possible to deploy processes with unknow bpmn elements, therefore ServiceTaskValidator must have knowledge of the custom se…

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**Author:** ![Vzy](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/vzy/32/1158_2.png) [@Vzy](https://forum.flowable.org/u/Vzy)\
**Post date:** [December 20, 2017, 5:09am UTC](https://forum.flowable.org/t/extension-of-user-task/1344/3 "2017-12-20T05:09:44Z")

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Hi Pascal,  
Thanks for quick reply,

Is this procedure applicable to User Task too?

~ Vzy

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**Author:** ![PascalSchumacher](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/pascalschumacher/32/336_2.png) [@PascalSchumacher](https://forum.flowable.org/u/PascalSchumacher)\
**Post date:** [December 20, 2017, 12:23pm UTC](https://forum.flowable.org/t/extension-of-user-task/1344/4 "2017-12-20T12:23:26Z")

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Hi Vzy,

I’m not sure. I guess it should be similar.