Upgrade to Elasticsearch 8.9.0.

pom.xml

@@ -21,7 +21,7 @@
 		<springdata.commons>3.2.0-SNAPSHOT</springdata.commons>
 
 		<!-- version of the ElasticsearchClient	-->
-		<elasticsearch-java>8.8.2</elasticsearch-java>
+		<elasticsearch-java>8.9.0</elasticsearch-java>
 
 		<blockhound-junit>1.0.8.RELEASE</blockhound-junit>
 		<hoverfly>0.14.4</hoverfly>

src/main/asciidoc/preface.adoc

@@ -37,7 +37,7 @@ built and tested.
 [cols="^,^,^,^,^",options="header"]
 |===
 | Spring Data Release Train | Spring Data Elasticsearch | Elasticsearch | Spring Framework | Spring Boot
-| 2023.1 (Vaughan) | 5.2.x | 8.8.2 | 6.0.x | 3.1.x
+| 2023.1 (Vaughan) | 5.2.x | 8.9.0 | 6.0.x | 3.1.x
 | 2023.0 (Ullmann) | 5.1.x | 8.7.1 | 6.0.x | 3.1.x
 | 2022.0 (Turing) | 5.0.x | 8.5.3 | 6.0.x | 3.0.x
 | 2021.2 (Raj) | 4.4.xfootnote:oom[Out of maintenance] | 7.17.3 | 5.3.x | 2.7.x

src/main/asciidoc/reference/elasticsearch-new.adoc

@@ -4,7 +4,7 @@
 [[new-features.5-2-0]]
 == New in Spring Data Elasticsearch 5.2
 
-* Upgrade to Elasticsearch 8.8.2
+* Upgrade to Elasticsearch 8.9.0
 * The `JsonpMapper` for Elasticsearch is now configurable and provided as bean.
 * Improved AOT runtime hints for Elasticsearch client library classes.
 * Add Kotlin extensions and repository coroutine support.

src/main/java/org/springframework/data/elasticsearch/client/elc/ElasticsearchClients.java

@@ -34,7 +34,9 @@
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
-import org.apache.http.*;
+import org.apache.http.HttpHost;
+import org.apache.http.HttpRequest;
+import org.apache.http.HttpRequestInterceptor;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.entity.ContentType;
 import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
@@ -261,26 +263,44 @@ private static ElasticsearchTransport getElasticsearchTransport(RestClient restC
 		TransportOptions.Builder transportOptionsBuilder = transportOptions != null ? transportOptions.toBuilder()
 				: new RestClientOptions(RequestOptions.DEFAULT).toBuilder();
 
+		RestClientOptions.Builder restClientOptionsBuilder = getRestClientOptionsBuilder(transportOptions);
+
 		ContentType jsonContentType = Version.VERSION == null ? ContentType.APPLICATION_JSON
 				: ContentType.create("application/vnd.elasticsearch+json",
 						new BasicNameValuePair("compatible-with", String.valueOf(Version.VERSION.major())));
 
 		Consumer<String> setHeaderIfNotPresent = header -> {
-			if (transportOptionsBuilder.build().headers().stream() //
+			if (restClientOptionsBuilder.build().headers().stream() //
 					.noneMatch((h) -> h.getKey().equalsIgnoreCase(header))) {
 				// need to add the compatibility header, this is only done automatically when not passing in custom options.
 				// code copied from RestClientTransport as it is not available outside the package
-				transportOptionsBuilder.addHeader(header, jsonContentType.toString());
+				restClientOptionsBuilder.addHeader(header, jsonContentType.toString());
 			}
 		};
-
+§
 		setHeaderIfNotPresent.accept("Content-Type");
 		setHeaderIfNotPresent.accept("Accept");
 
-		TransportOptions transportOptionsWithHeader = transportOptionsBuilder
-				.addHeader(X_SPRING_DATA_ELASTICSEARCH_CLIENT, clientType).build();
+		restClientOptionsBuilder.addHeader(X_SPRING_DATA_ELASTICSEARCH_CLIENT, clientType);
+
+		return new RestClientTransport(restClient, jsonpMapper, restClientOptionsBuilder.build());
+	}
+
+	private static RestClientOptions.Builder getRestClientOptionsBuilder(@Nullable TransportOptions transportOptions) {
 
-		return new RestClientTransport(restClient, jsonpMapper, transportOptionsWithHeader);
+		if (transportOptions instanceof RestClientOptions restClientOptions) {
+			return restClientOptions.toBuilder();
+		}
+
+		var builder =  new RestClientOptions.Builder(RequestOptions.DEFAULT.toBuilder());
+
+		if (transportOptions != null) {
+			transportOptions.headers().forEach(header -> builder.addHeader(header.getKey(), header.getValue()));
+			transportOptions.queryParameters().forEach(builder::setParameter);
+			builder.onWarnings(transportOptions.onWarnings());
+		}
+
+		return builder;
 	}
 
 	private static List<String> formattedHosts(List<InetSocketAddress> hosts, boolean useSsl) {

src/test/resources/testcontainers-elasticsearch.properties

@@ -15,7 +15,7 @@
 #
 #
 sde.testcontainers.image-name=docker.elastic.co/elasticsearch/elasticsearch
-sde.testcontainers.image-version=8.8.2
+sde.testcontainers.image-version=8.9.0
 #
 #
 # needed as we do a DELETE /* at the end of the tests, will be required from 8.0 on, produces a warning since 7.13