DATAES-421 updated to latest version of ES 6.2.2

pom.xml

@@ -19,7 +19,7 @@
     <properties>
         <commonscollections>3.2.1</commonscollections>
         <commonslang>2.6</commonslang>
-        <elasticsearch>6.1.0</elasticsearch>
+        <elasticsearch>6.2.2</elasticsearch>
         <log4j>2.9.1</log4j>
         <springdata.commons>2.1.0.BUILD-SNAPSHOT</springdata.commons>
         <java-module-name>spring.data.elasticsearch</java-module-name>

src/main/java/org/springframework/data/elasticsearch/core/ElasticsearchTemplate.java

@@ -29,6 +29,7 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.*;
+import java.util.stream.Collectors;
 
 import org.elasticsearch.action.ActionFuture;
 import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest;
@@ -961,16 +962,9 @@ public class ElasticsearchTemplate implements ElasticsearchOperations, Applicati
 	@Override
 	public Map getSetting(String indexName) {
 		Assert.notNull(indexName, "No index defined for getSettings");
-		Settings settings = client.admin().indices().getSettings(new GetSettingsRequest()).actionGet().getIndexToSettings()
-				.get(indexName);
-
-		SortedMap<String, String> settingsMap = new TreeMap<>();
-
-		settings.keySet().forEach((key) -> {
-			settingsMap.put(key, String.valueOf(settings.get(key)));
-		});
-
-		return Collections.unmodifiableSortedMap(settingsMap);
+		Settings settings = client.admin().indices().getSettings(new GetSettingsRequest()).actionGet()
+				.getIndexToSettings().get(indexName);
+		return settings.keySet().stream().collect(Collectors.toMap((key)->key, (key)->settings.get(key)));
 	}
 
 	private <T> SearchRequestBuilder prepareSearch(Query query, Class<T> clazz) {

src/test/java/org/elasticsearch/plugins/ExtendedPluginsClassLoader.java

@@ -0,0 +1,62 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.plugins;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A classloader that is a union over the parent core classloader and classloaders of extended plugins.
+ * Cloned from ES repository
+ * - that file is only available in ES server libs
+ * - and we need it o create a node client for unittests
+ */
+public class ExtendedPluginsClassLoader extends ClassLoader {
+
+    /** Loaders of plugins extended by a plugin. */
+    private final List<ClassLoader> extendedLoaders;
+
+    private ExtendedPluginsClassLoader(ClassLoader parent, List<ClassLoader> extendedLoaders) {
+        super(parent);
+        this.extendedLoaders = Collections.unmodifiableList(extendedLoaders);
+    }
+
+    @Override
+    protected Class<?> findClass(String name) throws ClassNotFoundException {
+        for (ClassLoader loader : extendedLoaders) {
+            try {
+                return loader.loadClass(name);
+            } catch (ClassNotFoundException e) {
+                // continue
+            }
+        }
+        throw new ClassNotFoundException(name);
+    }
+
+    /**
+     * Return a new classloader across the parent and extended loaders.
+     */
+    public static ExtendedPluginsClassLoader create(ClassLoader parent, List<ClassLoader> extendedLoaders) {
+        return AccessController.doPrivileged((PrivilegedAction<ExtendedPluginsClassLoader>)
+                () -> new ExtendedPluginsClassLoader(parent, extendedLoaders));
+    }
+}

src/test/resources/test-home-dir/modules/lang-expression/plugin-descriptor.properties

@@ -22,7 +22,7 @@
 description=Lucene expressions integration for Elasticsearch
 #
 # 'version': plugin's version
-version=6.1.0
+version=6.2.2
 #
 # 'name': the plugin name
 name=lang-expression
@@ -37,9 +37,12 @@ classname=org.elasticsearch.script.expression.ExpressionPlugin
 java.version=1.8
 #
 # 'elasticsearch.version': version of elasticsearch compiled against
-elasticsearch.version=6.1.0
+elasticsearch.version=6.2.2
 ### optional elements for plugins:
 #
+#  'extended.plugins': other plugins this plugin extends through SPI
+extended.plugins=
+#
 # 'has.native.controller': whether or not the plugin has a native controller
 has.native.controller=false
 #