AC-8767::ES 7 deprecation and ES 8 upgrade

Author: glo71317

app/code/Magento/Elasticsearch/ElasticAdapter/Model/Adapter/BatchDataMapper/CategoryFieldsProviderProxy.php

@@ -5,8 +5,8 @@
  */
 namespace Magento\Elasticsearch\ElasticAdapter\Model\Adapter\BatchDataMapper;
 
-use Magento\AdvancedSearch\Model\Client\ClientResolver;
 use Magento\AdvancedSearch\Model\Adapter\DataMapper\AdditionalFieldsProviderInterface;
+use Magento\AdvancedSearch\Model\Client\ClientResolver;
 
 /**
  * Proxy for data mapping of categories fields
@@ -37,6 +37,8 @@ public function __construct(
     }
 
     /**
+     * Get Category Fields Provider
+     *
      * @return AdditionalFieldsProviderInterface
      */
     private function getCategoryFieldsProvider()

app/code/Magento/Elasticsearch/ElasticAdapter/Model/Adapter/FieldMapper/Product/FieldProvider/FieldIndex/Converter.php

@@ -35,7 +35,7 @@ class Converter implements ConverterInterface
     ];
 
     /**
-     * Get service field index type for elasticsearch 5.
+     * Get service field index type for elasticsearch 7.x and 8.x.
      *
      * @param string $internalType
      * @return string|boolean

app/code/Magento/Elasticsearch/ElasticAdapter/Model/Adapter/FieldMapper/ProductFieldMapperProxy.php

@@ -37,6 +37,7 @@ public function __construct(
     }
 
     /**
+     * Get Product Field Mapper
      * @return FieldMapperInterface
      */
     private function getProductFieldMapper()

app/code/Magento/Elasticsearch/ElasticAdapter/Model/Client/ClientFactoryProxy.php

@@ -37,6 +37,8 @@ public function __construct(
     }
 
     /**
+     * Get Client Factory
+     *
      * @return ClientFactoryInterface
      */
     private function getClientFactory()

app/code/Magento/Elasticsearch/ElasticAdapter/SearchAdapter/Adapter.php

@@ -27,8 +27,6 @@ class Adapter implements AdapterInterface
     private $mapper;
 
     /**
-     * Response Factory
-     *
      * @var ResponseFactory
      */
     private $responseFactory;

app/code/Magento/Elasticsearch/README.md

@@ -2,7 +2,7 @@
 
 Magento_Elasticsearch module allows using the Elasticsearch engine for the product searching capabilities. This module
 provides logic used by other modules implementing newer versions of Elasticsearch, this module by itself only adds
-support for Elasticsearch v5.
+support for Elasticsearch v7 and v8.
 
 The module implements Magento_Search library interfaces.
 
@@ -14,7 +14,8 @@ For information about a module installation in Magento 2, see [Enable or disable
 
 ## Structure
 
-`ElasticAdapter/` - the directory that contains solutions for providing ElasticSearch 5.x version.
+`ElasticAdapter/` - the directory that contains the core files for providing support to ElasticSearch 7.x and 8.x 
+version.
 
 `SearchAdapter/` - the directory that contains solutions for adapting ElasticSearch query searching.