# Auto invalidation and triggering external function **URL:** \ **Category:** Elasticsearch\ **Created:** [April 27, 2016, 10:04am UTC](https://discuss.elastic.co/t/auto-invalidation-and-triggering-external-function/48534 "2016-04-27T10:04:29Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![espixxl](https://avatars.discourse-cdn.com/v4/letter/e/e19adc/32.png) [@espixxl](https://discuss.elastic.co/u/espixxl)\ **Post date:** [April 27, 2016, 10:04am UTC](https://discuss.elastic.co/t/auto-invalidation-and-triggering-external-function/48534/1 "2016-04-27T10:04:29Z")
Hi, I'm new in Elasticsearch, and I was wondering if Elasticsearch has some way to invalidate it's data and then call an external function/url (an API endpoint which refresh the data)? So, in the end my main doubt is about if Elasticsearch can trigger something someway. Thanks ---
**Author:** ![dakrone](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dakrone/32/23351_2.png) [@dakrone](https://discuss.elastic.co/u/dakrone)\ **Post date:** [April 27, 2016, 5:17pm UTC](https://discuss.elastic.co/t/auto-invalidation-and-triggering-external-function/48534/2 "2016-04-27T17:17:41Z")
I'm not 100% sure I understand you, but it sounds like you want to be able to have Elasticsearch reach out to a different endpoint when documents are deleted? If so, there's no way to have Elasticsearch tell a different system that documents have been deleted. It sounds like something like the Changes API - [https://github.com/elastic/elasticsearch/issues/1242](https://github.com/elastic/elasticsearch/issues/1242) might be useful when added. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 10:55pm UTC](https://discuss.elastic.co/t/auto-invalidation-and-triggering-external-function/48534/3 "2017-07-05T22:55:51Z")
Closed on July 5, 2017, 10:55pm UTC