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Update compatibility headers documentation

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Peter-Josef Meisch 2022-02-19 13:45:21 +01:00
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src/main/asciidoc/reference/elasticsearch-clients.adoc
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@ -154,23 +154,28 @@ If this is used in the reactive setup, the supplier function *must not* block!
=== Elasticsearch 7 compatibility headers
When using Spring Data Elasticsearch 4 - which uses the Elasticsearch 7 client libraries - and accessing an Elasticsearch cluster that is running on version 8, it is necessary to set the compatibility headers
https://www.elastic.co/guide/en/elasticsearch/reference/8.0/rest-api-compatibility.html[see Elasticserach documentation].
This should be done using a header supplier like shown above:
https://www.elastic.co/guide/en/elasticsearch/reference/8.0/rest-api-compatibility.html[see Elasticsearch
documentation].
For the imperative client this must be done by setting the default headers, for the reactive code this must be done using a header supplier:
====
[source,java]
----
ClientConfigurationBuilder configurationBuilder = new ClientConfigurationBuilder();
configurationBuilder //
// ...
.withHeaders(() -> {
HttpHeaders defaultCompatibilityHeaders = new HttpHeaders();
defaultCompatibilityHeaders.add("Accept",
"application/vnd.elasticsearch+json;compatible-with=7");
defaultCompatibilityHeaders.add("Content-Type",
"application/vnd.elasticsearch+json;compatible-with=7");
return defaultCompatibilityHeaders;
});
HttpHeaders compatibilityHeaders = new HttpHeaders();
compatibilityHeaders.add("Accept", "application/vnd.elasticsearch+json;compatible-with=7");
compatibilityHeaders.add("Content-Type", "application/vnd.elasticsearch+json;"
+ "compatible-with=7");
ClientConfiguration clientConfiguration = ClientConfiguration.builder()
.connectedTo("localhost:9200")
.withProxy("localhost:8080")
.withBasicAuth("elastic","hcraescitsale")
.withDefaultHeaders(compatibilityHeaders) // this variant for imperative code
.withHeaders(() -> compatibilityHeaders) // this variant for reactive code
.build();
----
====