# Elasticsearch's top-level event loop or handler?

**URL:** <https://discuss.elastic.co/t/elasticsearchs-top-level-event-loop-or-handler/8027>\
**Category:** Elasticsearch\
**Created:** [June 9, 2012, 12:41am UTC](https://discuss.elastic.co/t/elasticsearchs-top-level-event-loop-or-handler/8027 "2012-06-09T00:41:14Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Eric\_Jain](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eric_jain/32/834_2.png) [@Eric\_Jain](https://discuss.elastic.co/u/Eric_Jain)\
**Post date:** [June 9, 2012, 12:41am UTC](https://discuss.elastic.co/t/elasticsearchs-top-level-event-loop-or-handler/8027/1 "2012-06-09T00:41:14Z")

</div>

If I want to collect response time stats and exceptions for a standard  
Java web application, I can instrument the Servlet.service(request,  
response) method.

Is there a comparable method in elasticsearch?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 3:25am UTC](https://discuss.elastic.co/t/elasticsearchs-top-level-event-loop-or-handler/8027/2 "2017-07-06T03:25:08Z")

</div>