# Default listener for all tasks (CMMN)
**URL:** https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979
**Category:** Flowable Engine
**Created:** [December 2, 2019, 8:56am UTC](https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979 "2019-12-02T08:56:34Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@chrisburrell](https://forum.flowable.org/u/chrisburrell)
#### Post date: [December 2, 2019, 8:56am UTC](https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979/1 "2019-12-02T08:56:34Z")
Hi
I was wondering if it’s possible to get flowable to have a generic/default listener for all tasks, without having to wire it in for every single task in the XML configuration - in other words, configuring flowable to fire a listener that can be re-used everywhere but without having to write it in anywhere.
The idea would be to be able to fire off messages to other external services automatically saying “Task X has completed” - being able to do this generically for everything, means we wouldn’t need to be rely on developers to remember
Cheers
Chris
---
### Author:  [@martin.grofcik](https://forum.flowable.org/u/martin.grofcik)
#### Post date: [December 2, 2019, 9:58am UTC](https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979/2 "2019-12-02T09:58:45Z")
Hi Chris.
Use the same mechanism as is used for processes:
[https://www.flowable.org/docs/userguide/index.html#advanced\_parseHandlers](https://www.flowable.org/docs/userguide/index.html#advanced_parseHandlers)
You can configure parse handlers in cmmn engine configuration.
Regards
Martin
---
### Author:  [@ASarco](https://forum.flowable.org/u/ASarco)
#### Post date: [December 3, 2019, 6:22pm UTC](https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979/3 "2019-12-03T18:22:05Z")
Hi @martin.grofcik , I’m a colleague of Chris and I was trying to implement this.
By stepping through code, I can see that the configuration is modified by adding my taskParseHandler to the postCmmnParseHandler collection, but the parse() method is never called. Therefore, my listener is not being added.
I’m I doing something wrong, or is there a bug somewhere?
```
@Configuration
@AutoConfigureAfter(CmmnEngineAutoConfiguration.class)
class FlowableConfigurationConfigurer {
private static final Logger LOGGER = LoggerFactory.getLogger(FlowableConfigurationConfigurer.class);
@Autowired
private TaskListener taskListener;
@Bean
@ConditionalOnClass(SpringCmmnEngineConfiguration.class)
public EngineConfigurationConfigurer customizeSpringProcessEngineConfiguration() {
return processEngineConfiguration -> {
LOGGER.info("Overriding process engine configuration");
List postCmmnParseHandlers = processEngineConfiguration.getPostCmmnParseHandlers();
if (Objects.isNull(postCmmnParseHandlers)) {
postCmmnParseHandlers = new ArrayList<>();
}
postCmmnParseHandlers.add(new TaskParseHandler() {
@Override
public void parse(CmmnParser cmmnParser, CmmnParseResult cmmnParseResult, BaseElement element) {
List extensionElements = element.getExtensionElements().get("taskListener");
ExtensionAttribute eventAttribute = new ExtensionAttribute();
eventAttribute.setName("event");
eventAttribute.setValue("complete");
ExtensionAttribute delegateAttribute = new ExtensionAttribute();
delegateAttribute.setName("delegateExpression");
delegateAttribute.setValue("${basicTaskListener}");
ExtensionElement extensionElement = new ExtensionElement();
extensionElement.setName("taskListener");
extensionElement.addAttribute(delegateAttribute);
extensionElement.addAttribute(eventAttribute);
extensionElements.add(extensionElement);
super.parse(cmmnParser, cmmnParseResult, element);
}
});
};
}
private Map> addEngineEventListeners() {
Map> typedEventListeners = new HashMap<>();
typedEventListeners.put(FlowableEngineEventType.TASK_CREATED.name(), List.of(taskListener));
return typedEventListeners;
}
}
```
Thanks.
---
### Author:  [@joram](https://forum.flowable.org/u/joram)
#### Post date: [December 5, 2019, 8:45am UTC](https://forum.flowable.org/t/default-listener-for-all-tasks-cmmn/4979/4 "2019-12-05T08:45:35Z")
It looks like you’re only adding a process task parse handler to the engine (also, you’re not setting the list on the engineConfig when it’s null). For CMMN, you’d need a different implementation, injected into the cmmn engine configuration. You can add these through the #setCustomCmmnParseHandlers method.