HSEARCH-5361 Add Elasticsearch 9.0.0 compatibility

Author: marko-bekhta

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactory.java

@@ -182,6 +182,9 @@ else if ( major == 7 ) {
 		else if ( major == 8 ) {
 			return createProtocolDialectElasticV8( version, minor );
 		}
+		else if ( major == 9 ) {
+			return createProtocolDialectElasticV9( version, minor );
+		}
 		else {
 			VersionLog.INSTANCE.unknownElasticsearchVersion( version );
 			return new Elasticsearch81ProtocolDialect();
@@ -205,6 +208,13 @@ else if ( minor == 0 ) {
 		return new Elasticsearch81ProtocolDialect();
 	}
 
+	private ElasticsearchProtocolDialect createProtocolDialectElasticV9(ElasticsearchVersion version, int minor) {
+		if ( minor > 0 ) {
+			VersionLog.INSTANCE.unknownElasticsearchVersion( version );
+		}
+		return new Elasticsearch81ProtocolDialect();
+	}
+
 	private ElasticsearchProtocolDialect createProtocolDialectOpenSearch(ElasticsearchVersion version) {
 		OptionalInt majorOptional = version.majorOptional();
 		OptionalInt minorOptional = version.minor();

backend/elasticsearch/src/test/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactoryTest.java

@@ -289,6 +289,14 @@ public static List<? extends Arguments> params() {
 						ElasticsearchDistributionName.ELASTIC, "8.17.0", "8.17.0",
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
+				success(
+						ElasticsearchDistributionName.ELASTIC, "9.0", "9.0.0",
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
+				),
+				success(
+						ElasticsearchDistributionName.ELASTIC, "9.0.0", "9.0.0",
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
+				),
 				successWithWarning(
 						ElasticsearchDistributionName.ELASTIC, "8.18", "8.18.0",
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
@@ -298,7 +306,7 @@ public static List<? extends Arguments> params() {
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				successWithWarning(
-						ElasticsearchDistributionName.ELASTIC, "9.0.0", "9.0.0",
+						ElasticsearchDistributionName.ELASTIC, "9.1.0", "9.1.0",
 						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				success(

build/parents/build/pom.xml

@@ -60,8 +60,8 @@
         <version.org.elasticsearch.compatible.regularly-tested.text>7.10, 7.17 or 8.17</version.org.elasticsearch.compatible.regularly-tested.text>
         <!-- These are the versions same as above, but pointing only to the major part (used in compatibility section of ES backend documentation
           as versions that Hibernate Search is compatible with. -->
-        <!-- NOTE: Adding new major versions would require to update the compatibility table in `backend-elasticsearch-compatibility` section of `backend-elasticsearch.asciidoc`. -->
-        <version.org.elasticsearch.compatible.expected.text>7.10+ or 8.x</version.org.elasticsearch.compatible.expected.text>
+        <!-- NOTE: Adding new major versions would require to update the compatibility table in `backend-elasticsearch-compatibility` section of `backend-elasticsearch.adoc`. -->
+        <version.org.elasticsearch.compatible.expected.text>7.10+, 8.x or 9.x</version.org.elasticsearch.compatible.expected.text>
         <!-- The versions of Elasticsearch that may work, but are not given priority for bugfixes and new features -->
         <version.org.elasticsearch.compatible.not-regularly-tested.text>7.11 or 8.0</version.org.elasticsearch.compatible.not-regularly-tested.text>
         <!--