Adding custom analyzer to elasticsearch via grails plugin - grails

Question

I'm trying to add a custom analyzer to elasticsearch via grails plugin. I was able to change the used analyzer to a common analyzer using "searchable" on the domain:
static searchable = {
all = [analyzer: 'snowball']
}
but cannot get it to know a costum analyzer. It is unclear how to translate the following json in the REST API to a groovy closue:
PUT /my_index
{
"settings": {
"analysis": {
"filter": {
"my_synonym_filter": {
"type": "synonym",
"synonyms": [
"british,english",
"queen,monarch"
]
}
},
"analyzer": {
"my_synonyms": {
"tokenizer": "standard",
"filter": [
"lowercase",
"my_synonym_filter"
]
}
}
}
}
}
this question seems to have the same problem but the answer doesn't work, and this answer suggests that it might not be possible, but that doesn't seem reasonable because setting a custom analyzer is pretty basic.
Any suggestions?

Answer 1

There are two ways I see which would help you achieve that.
The first way is by going through the low level API using the injected elasticSearchHelper and accessing ES client directly.
elasticSearchHelper.withElasticSearch { client ->
// Do some stuff with the ElasticSearch client
client.admin()
.indices()
.prepareCreate(indexName)
.setSettings(settings) <--- your settings/analyzers go here
.execute()
.actionGet()
}
A second way involves using an undocumented feature of the ElasticSearchAdminService service, namely the createIndex() method, which allows you to pass in the settings and analyzers you need when creating a new index. The latter basically does exactly the same as the first option above, but you get to use the Grails service directly.