# Can I use a signal in CallActivity?

**URL:** <https://forum.flowable.org/t/can-i-use-a-signal-in-callactivity/4572>\
**Category:** Uncategorized\
**Created:** [September 25, 2019, 2:07am UTC](https://forum.flowable.org/t/can-i-use-a-signal-in-callactivity/4572 "2019-09-25T02:07:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![yepengchen](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/yepengchen/32/1307_2.png) [@yepengchen](https://forum.flowable.org/u/yepengchen)\
**Post date:** [September 25, 2019, 2:07am UTC](https://forum.flowable.org/t/can-i-use-a-signal-in-callactivity/4572/1 "2019-09-25T02:07:38Z")

</div>

I try to use signal in callactivity,but It does not work.There is no data in the act\_ru\_event\_subscr table.

---

<div class="post-metadata">

**Author:** ![martin.grofcik](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/martin.grofcik/32/71_2.png) [@martin.grofcik](https://forum.flowable.org/u/martin.grofcik)\
**Post date:** [September 25, 2019, 6:16am UTC](https://forum.flowable.org/t/can-i-use-a-signal-in-callactivity/4572/2 "2019-09-25T06:16:46Z")

</div>

Hi.

You can find an example of call activity signal in the jUnit tests. e.g. [https://github.com/flowable/flowable-engine/blob/f3c20f8d2b34e54473d3a83e37debe23e50da330/modules/flowable-engine/src/test/java/org/flowable/engine/test/bpmn/event/signal/SignalEventTest.java#L340](https://github.com/flowable/flowable-engine/blob/f3c20f8d2b34e54473d3a83e37debe23e50da330/modules/flowable-engine/src/test/java/org/flowable/engine/test/bpmn/event/signal/SignalEventTest.java#L340)

Regards  
Martin