Event Handling in Elasticsearch

narinder_izap · January 5, 2012, 4:57am

          Hi there,
                       I want to know if the elasticsearch has

implemented the event handling. Means, something similar to the triggers,
for example, I want my scripting language to perform some action whenever
some document of a particular type is pushed in the Elasticsearch Index.

Kartavya · January 5, 2012, 5:46am

Hi

Check percolate on index.

github.com/elastic/elasticsearch

Percolate on Index and Bulk

opened 02:45PM - 19 Jan 11 UTC

closed 02:46PM - 19 Jan 11 UTC

kimchy

>feature v0.15.0

The index and bulk operation (for index bulk items) can now be automatically per…colated and return the queries they matched on. The `percolate` parameter can be passed to control which percolation queries should be used (it follows the query string format). For example: Create an index we will work on: ``` curl -XPUT localhost:9200/test ``` Next, we will register a percolator query with a specific name called `kuku` against the `test` index: ``` curl -XPUT localhost:9200/_percolator/test/kuku?refresh=true -d '{ "color" : "blue", "query" : { "term" : { "field1" : "value1" } } }' ``` And now, we will index a doc, that has `field1` set to `value1`, and have it percolate: ``` curl -XPUT localhost:9200/test/type1/1?percolate=* -d '{ "field1" : "value1" }' ``` We will get this response: ``` {"ok":true,"_index":"test","_type":"type1","_id":"1","_version":2,"matches":["kuku"]} ``` Percolation query filtering is simple to do, lets register another query, for `bubu`, but now with `color` set to `green` and matching on `field2`: ``` curl -XPUT localhost:9200/_percolator/test/bubu?refresh=true -d '{ "color" : "green", "query" : { "term" : { "field2" : "value2" } } }' ``` Now, we can control which queries can be executed, for example: ``` curl -XPUT localhost:9200/test/type1/1?percolate=* -d '{ "field1" : "value1", "field2" : "value2" }' curl -XPUT localhost:9200/test/type1/1?percolate=color:green -d '{ "field1" : "value1", "field2" : "value2" }' curl -XPUT localhost:9200/test/type1/1?percolate=color:blue -d '{ "field1" : "value1", "field2" : "value2" }' ``` ## Implementation Details Percolation on index operation is done while optimizing the distributed nature of elasticsearch. Once the index operation is done on the primary shard, it is sent to all the replicas, and while the operation is done on the replicas, the percolation is executed on the node hosting the primary shard. Also, the parsing operation done on the primary shard is reused for the percolation operation.

Regards,
Pulkit Agrawal

On Thu, Jan 5, 2012 at 10:27 AM, Narinder Kaur narinder.kaur@izap.in wrote:

          Hi there,
                       I want to know if the elasticsearch has
implemented the event handling. Means, something similar to the triggers,
for example, I want my scripting language to perform some action whenever
some document of a particular type is pushed in the Elasticsearch Index.

karmi · January 7, 2012, 9:50am

Yes, _percolate is the thing you're after, as Pulkit suggests. Check
out http://karmi.github.com/tire/#section-Percolation for an example
how to do it with Ruby. Other clients will have similar support.

On Jan 5, 5:57 am, Narinder Kaur narinder.k...@izap.in wrote:

          Hi there,
                       I want to know if the elasticsearch has
implemented the event handling. Means, something similar to the triggers,
for example, I want my scripting language to perform some action whenever
some document of a particular type is pushed in the Elasticsearch Index.