# How does percolation Notification work?

**URL:** <https://discuss.elastic.co/t/how-does-percolation-notification-work/19628>\
**Category:** Elasticsearch\
**Created:** [September 4, 2014, 4:21pm UTC](https://discuss.elastic.co/t/how-does-percolation-notification-work/19628 "2014-09-04T16:21:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![IronMike](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@IronMike](https://discuss.elastic.co/u/IronMike)\
**Post date:** [September 4, 2014, 4:21pm UTC](https://discuss.elastic.co/t/how-does-percolation-notification-work/19628/1 "2014-09-04T16:21:01Z")

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I would like to know how others go about percolation notification. I have  
couple of questions that I am not clear on.

My setup:

- I have a webApp that talks to Index server to do searches.
- Index through TransportClient/Java/BulkProcessor

Simple Use case: Users register for interests in webapp say "security" and  
I want the users to receive alerts when new matching docs come in.  
Example: I register "securityPercolator" with a REST call. The  
transportClient would index new Documents and match against  
"securityPercolator", it also find 10 matches against the percolator.

My Questions:  
1- What is the best way to notify the webapp that there are 10 matches for  
"securityPercolator" from within transportClient? Should I be doing it a  
different way?  
2- In the web app, if I register "securityPercolator" for users with  
searching for "security, should I be storing the percolator name also?  
Because how does it know that "securityPercolator" means "security"?  
3- Is it a problem registering many percolators if I had 2000 users for  
example?

Thanks

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**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, 1:04am UTC](https://discuss.elastic.co/t/how-does-percolation-notification-work/19628/2 "2017-07-06T01:04:21Z")

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