How to create index template in ElsaticSearch 7.17 or later using Java API Client?
I decided not to use the Java High Level REST Client because it was marked as deprecated.
However, no reference materials were found anywhere for generating index templates using the Java API Client.
In particular, I don't know how to set the mappings.
I tried as below, the index template was created, but the mappings are displayed as empty.
Map<String, JsonData> settings = new HashMap<>();
settings.put("number_of_shards", JsonData.of(1));
settings.put("number_of_replicas", JsonData.of(0));
settings.put("index", JsonData.of(Json.createObjectBuilder()
.add("lifecycle", Json.createObjectBuilder()
.add("name", ilmPolicyName)
.add("rollover_alias", indexAlias)
).build()));
JsonpMapper mapper = elasticsearchClient._transport().jsonpMapper();
String json = Files.readString(Path.of("src/main/resources/static/indexTemplate.json"));
JsonParser parser = mapper.jsonProvider().createParser(new StringReader(json));
elasticsearchClient.indices().putTemplate(PutTemplateRequest.of(b -> b
.name(indexTemplateName)
.indexPatterns(List.of(indexPattern))
.settings(settings)
.mappings(TypeMapping._DESERIALIZER.deserialize(parser, mapper))
));
What's wrong?
