# Signal events with input / output parameters

**URL:** <https://forum.flowable.org/t/signal-events-with-input-output-parameters/7065>\
**Category:** Uncategorized\
**Created:** [November 11, 2020, 8:15pm UTC](https://forum.flowable.org/t/signal-events-with-input-output-parameters/7065 "2020-11-11T20:15:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sk-al](https://avatars.discourse-cdn.com/v4/letter/s/e480ec/32.png) [@sk-al](https://forum.flowable.org/u/sk-al)\
**Post date:** [November 11, 2020, 8:15pm UTC](https://forum.flowable.org/t/signal-events-with-input-output-parameters/7065/1 "2020-11-11T20:15:28Z")

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Excited to see that the 6.6 release includes

> - In and out parameters can be defined for signal events, similar to the existing in and out parameter support for call activities…

Is there any code / examples I can look at to see how this looks in terms of XML.  
There doesn’t seem to be any UI for it yet, but if I can figure out how to do it manually that will work for me

I’m imagining it will look something like the following??

```
<signal id="someSignal" name="Some Signal" flowable:scope="processInstance"></signal>
<process id="test1" name="test1" isExecutable="true">
 <startEvent id="startEvent1" flowable:formFieldValidation="true"></startEvent>
<sequenceFlow id="1" sourceRef="startEvent1" targetRef="throwSignalWithParams"></sequenceFlow>
 <intermediateThrowEvent id="throwSignalWithParams">
  <signalEventDefinition>
        <extensionElements>
             <flowable:out source="myVar" target="targetMyVar"></flowable:out>
       </extensionElements>      
       </signalEventDefinition>
       </intermediateThrowEvent>
     <endEvent id="end"></endEvent>
     <sequenceFlow id="2" sourceRef="throwSignalWithParams" targetRef="end"></sequenceFlow> </process>

```

---

<div class="post-metadata">

**Author:** ![joram](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/joram/32/26_2.png) [@joram](https://forum.flowable.org/u/joram)\
**Post date:** [November 16, 2020, 8:34pm UTC](https://forum.flowable.org/t/signal-events-with-input-output-parameters/7065/2 "2020-11-16T20:34:09Z")

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Here’s an example BPMN xml: [https://github.com/flowable/flowable-engine/blob/master/modules/flowable-engine/src/test/resources/org/flowable/engine/test/bpmn/event/signal/SignalEventTest.testNonInterruptingSignalWithInParameters.bpmn20.xml#L15](https://github.com/flowable/flowable-engine/blob/master/modules/flowable-engine/src/test/resources/org/flowable/engine/test/bpmn/event/signal/SignalEventTest.testNonInterruptingSignalWithInParameters.bpmn20.xml#L15)

Which can be set in the API by doing something like

```
        Map<String, Object> payload = new HashMap<>();
        payload.put("testVar", "test");
        payload.put("anotherVar", "anotherTest");
        payload.put("nameVar", "John Doe");
        runtimeService.signalEventReceived("alert", payload);
```