Fix reactive blocking calls.

Original Pull Request #1825 
Closes #1824

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

@@ -101,7 +101,10 @@ public abstract class AbstractElasticsearchTemplate implements ElasticsearchOper
 		this.routingResolver = new DefaultRoutingResolver((SimpleElasticsearchMappingContext) mappingContext);
 
 		requestFactory = new RequestFactory(elasticsearchConverter);
-		VersionInfo.logVersions(getClusterVersion());
+
+		// initialize the VersionInfo class in the initialization phase
+		// noinspection ResultOfMethodCallIgnored
+		VersionInfo.versionProperties();
 	}
 
 	/**
@@ -166,6 +169,16 @@ public abstract class AbstractElasticsearchTemplate implements ElasticsearchOper
 	public RefreshPolicy getRefreshPolicy() {
 		return refreshPolicy;
 	}
+
+	/**
+	 * logs the versions of the different Elasticsearch components.
+	 *
+	 * @since 4.3
+	 */
+	public void logVersions() {
+		VersionInfo.logVersions(getClusterVersion());
+	}
+
 	// endregion
 
 	// region DocumentOperations

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

@@ -49,8 +49,8 @@ import org.springframework.data.elasticsearch.core.index.AliasData;
 import org.springframework.data.elasticsearch.core.index.DeleteTemplateRequest;
 import org.springframework.data.elasticsearch.core.index.ExistsTemplateRequest;
 import org.springframework.data.elasticsearch.core.index.GetTemplateRequest;
-import org.springframework.data.elasticsearch.core.index.MappingBuilder;
 import org.springframework.data.elasticsearch.core.index.PutTemplateRequest;
+import org.springframework.data.elasticsearch.core.index.ReactiveMappingBuilder;
 import org.springframework.data.elasticsearch.core.index.Settings;
 import org.springframework.data.elasticsearch.core.index.TemplateData;
 import org.springframework.data.elasticsearch.core.mapping.ElasticsearchPersistentEntity;
@@ -190,8 +190,7 @@ class DefaultReactiveIndexOperations implements ReactiveIndexOperations {
 			}
 		}
 
-		String mapping = new MappingBuilder(converter).buildPropertyMapping(clazz);
-		return Mono.just(Document.parse(mapping));
+		return new ReactiveMappingBuilder(converter).buildReactivePropertyMapping(clazz).map(Document::parse);
 	}
 
 	@Override

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

@@ -142,7 +142,9 @@ public class ReactiveElasticsearchTemplate implements ReactiveElasticsearchOpera
 		this.operations = new EntityOperations(this.mappingContext);
 		this.requestFactory = new RequestFactory(converter);
 
-		logVersions();
+		// initialize the VersionInfo class in the initialization phase
+		// noinspection ResultOfMethodCallIgnored
+		VersionInfo.versionProperties();
 	}
 
 	private ReactiveElasticsearchTemplate copy() {
@@ -155,11 +157,14 @@ public class ReactiveElasticsearchTemplate implements ReactiveElasticsearchOpera
 		return copy;
 	}
 
-	private void logVersions() {
-		getClusterVersion() //
-				.doOnSuccess(VersionInfo::logVersions) //
-				.doOnError(e -> VersionInfo.logVersions(null)) //
-				.subscribe();
+	/**
+	 * logs the versions of the different Elasticsearch components.
+	 *
+	 * @return a Mono signalling finished execution
+	 * @since 4.3
+	 */
+	public Mono<Void> logVersions() {
+		return getClusterVersion().doOnNext(VersionInfo::logVersions).then();
 	}
 
 	@Override

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

@@ -63,7 +63,7 @@ public abstract class ReactiveResourceUtil {
 
 						String line;
 						while ((line = br.readLine()) != null) {
-							sb.append(line);
+							sb.append(line).append('\n');
 						}
 
 						sink.next(sb.toString());

src/main/java/org/springframework/data/elasticsearch/core/index/MappingBuilder.java

@@ -97,7 +97,7 @@ public class MappingBuilder {
 	private static final String DYNAMIC_DATE_FORMATS = "dynamic_date_formats";
 	private static final String RUNTIME = "runtime";
 
-	private final ElasticsearchConverter elasticsearchConverter;
+	protected final ElasticsearchConverter elasticsearchConverter;
 
 	private boolean writeTypeHints = true;
 
@@ -113,9 +113,16 @@ public class MappingBuilder {
 	 */
 	public String buildPropertyMapping(Class<?> clazz) throws MappingException {
 
+		ElasticsearchPersistentEntity<?> entity = elasticsearchConverter.getMappingContext()
+				.getRequiredPersistentEntity(clazz);
+
+		return buildPropertyMapping(entity, getRuntimeFields(entity));
+	}
+
+	protected String buildPropertyMapping(ElasticsearchPersistentEntity<?> entity,
+			@Nullable org.springframework.data.elasticsearch.core.document.Document runtimeFields) {
+
 		try {
-			ElasticsearchPersistentEntity<?> entity = elasticsearchConverter.getMappingContext()
-					.getRequiredPersistentEntity(clazz);
 
 			writeTypeHints = entity.writeTypeHints();
 
@@ -124,7 +131,8 @@ public class MappingBuilder {
 			// Dynamic templates
 			addDynamicTemplatesMapping(builder, entity);
 
-			mapEntity(builder, entity, true, "", false, FieldType.Auto, null, entity.findAnnotation(DynamicMapping.class));
+			mapEntity(builder, entity, true, "", false, FieldType.Auto, null, entity.findAnnotation(DynamicMapping.class),
+					runtimeFields);
 
 			builder.endObject() // root object
 					.close();
@@ -148,7 +156,8 @@ public class MappingBuilder {
 
 	private void mapEntity(XContentBuilder builder, @Nullable ElasticsearchPersistentEntity<?> entity,
 			boolean isRootObject, String nestedObjectFieldName, boolean nestedOrObjectField, FieldType fieldType,
-			@Nullable Field parentFieldAnnotation, @Nullable DynamicMapping dynamicMapping) throws IOException {
+			@Nullable Field parentFieldAnnotation, @Nullable DynamicMapping dynamicMapping,
+			@Nullable org.springframework.data.elasticsearch.core.document.Document runtimeFields) throws IOException {
 
 		if (entity != null && entity.isAnnotationPresent(Mapping.class)) {
 			Mapping mappingAnnotation = entity.getRequiredAnnotation(Mapping.class);
@@ -170,8 +179,8 @@ public class MappingBuilder {
 				builder.field(DYNAMIC_DATE_FORMATS, mappingAnnotation.dynamicDateFormats());
 			}
 
-			if (StringUtils.hasText(mappingAnnotation.runtimeFieldsPath())) {
-				addRuntimeFields(builder, mappingAnnotation.runtimeFieldsPath());
+			if (runtimeFields != null) {
+				builder.field(RUNTIME, runtimeFields);
 			}
 		}
 
@@ -227,13 +236,22 @@ public class MappingBuilder {
 
 	}
 
-	private void addRuntimeFields(XContentBuilder builder, String runtimeFieldsPath) throws IOException {
+	@Nullable
+	private org.springframework.data.elasticsearch.core.document.Document getRuntimeFields(
+			@Nullable ElasticsearchPersistentEntity<?> entity) {
 
-		ClassPathResource runtimeFields = new ClassPathResource(runtimeFieldsPath);
+		if (entity != null) {
+			Mapping mappingAnnotation = entity.findAnnotation(Mapping.class);
+			if (mappingAnnotation != null) {
+				String runtimeFieldsPath = mappingAnnotation.runtimeFieldsPath();
 
-		if (runtimeFields.exists()) {
-			builder.rawField(RUNTIME, runtimeFields.getInputStream(), XContentType.JSON);
+				if (hasText(runtimeFieldsPath)) {
+					String jsonString = ResourceUtil.readFileFromClasspath(runtimeFieldsPath);
+					return org.springframework.data.elasticsearch.core.document.Document.parse(jsonString);
+				}
+			}
 		}
+		return null;
 	}
 
 	private void buildPropertyMapping(XContentBuilder builder, boolean isRootObject,
@@ -291,7 +309,7 @@ public class MappingBuilder {
 						: null;
 
 				mapEntity(builder, persistentEntity, false, property.getFieldName(), true, fieldAnnotation.type(),
-						fieldAnnotation, dynamicMapping);
+						fieldAnnotation, dynamicMapping, null);
 				return;
 			}
 		}

src/main/java/org/springframework/data/elasticsearch/core/index/ReactiveMappingBuilder.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2021 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.data.elasticsearch.core.index;
+
+import static org.springframework.util.StringUtils.*;
+
+import reactor.core.publisher.Mono;
+
+import org.springframework.data.elasticsearch.annotations.Mapping;
+import org.springframework.data.elasticsearch.core.ReactiveResourceUtil;
+import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
+import org.springframework.data.elasticsearch.core.document.Document;
+import org.springframework.data.elasticsearch.core.mapping.ElasticsearchPersistentEntity;
+import org.springframework.data.mapping.MappingException;
+import org.springframework.lang.Nullable;
+
+/**
+ * Subclass of {@link MappingBuilder} with specialized methods TO inhibit blocking CALLS
+ *
+ * @author Peter-Josef Meisch
+ * @since 4.3
+ */
+public class ReactiveMappingBuilder extends MappingBuilder {
+
+	public ReactiveMappingBuilder(ElasticsearchConverter elasticsearchConverter) {
+		super(elasticsearchConverter);
+	}
+
+	@Override
+	public String buildPropertyMapping(Class<?> clazz) throws MappingException {
+		throw new UnsupportedOperationException(
+				"Use ReactiveMappingBuilder.buildReactivePropertyMapping() instead of buildPropertyMapping()");
+	}
+
+	public Mono<String> buildReactivePropertyMapping(Class<?> clazz) throws MappingException {
+		ElasticsearchPersistentEntity<?> entity = elasticsearchConverter.getMappingContext()
+				.getRequiredPersistentEntity(clazz);
+
+		return getRuntimeFields(entity) //
+				.switchIfEmpty(Mono.just(Document.create())) //
+				.map(document -> {
+					if (document.isEmpty()) {
+						return buildPropertyMapping(entity, null);
+					} else {
+						return buildPropertyMapping(entity, document);
+					}
+				});
+	}
+
+	private Mono<Document> getRuntimeFields(@Nullable ElasticsearchPersistentEntity<?> entity) {
+
+		if (entity != null) {
+			Mapping mappingAnnotation = entity.findAnnotation(Mapping.class);
+			if (mappingAnnotation != null) {
+				String runtimeFieldsPath = mappingAnnotation.runtimeFieldsPath();
+
+				if (hasText(runtimeFieldsPath)) {
+					return ReactiveResourceUtil.readFileFromClasspath(runtimeFieldsPath).map(Document::parse);
+				}
+			}
+		}
+
+		return Mono.empty();
+	}
+}

src/main/java/org/springframework/data/elasticsearch/support/VersionInfo.java

@@ -15,9 +15,9 @@
  */
 package org.springframework.data.elasticsearch.support;
 
+import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
-import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.elasticsearch.Version;
 import org.slf4j.Logger;
@@ -35,70 +35,76 @@ import org.springframework.lang.Nullable;
 public final class VersionInfo {
 
 	private static final Logger LOG = LoggerFactory.getLogger(VersionInfo.class);
-	private static final AtomicBoolean initialized = new AtomicBoolean(false);
 
-	private static final String VERSION_PROPERTIES = "versions.properties";
+	protected static final String VERSION_PROPERTIES = "versions.properties";
 	public static final String VERSION_SPRING_DATA_ELASTICSEARCH = "version.spring-data-elasticsearch";
 	public static final String VERSION_ELASTICSEARCH_CLIENT = "version.elasticsearch-client";
 
-	/**
-	 * logs the relevant version info the first time it is called. Does nothing after the first call
-	 * 
-	 * @param clusterVersion the version of the cluster
-	 */
-	public static void logVersions(@Nullable String clusterVersion) {
-		if (!initialized.getAndSet(true)) {
-			try {
-				InputStream resource = VersionInfo.class.getClassLoader().getResourceAsStream(VERSION_PROPERTIES);
-				if (resource != null) {
-					Properties properties = new Properties();
-					properties.load(resource);
+	private static Properties versionProperties;
 
-					String versionSpringDataElasticsearch = properties.getProperty(VERSION_SPRING_DATA_ELASTICSEARCH);
-					Version versionESBuilt = Version.fromString(properties.getProperty(VERSION_ELASTICSEARCH_CLIENT));
-					Version versionESUsed = Version.CURRENT;
-					Version versionESCluster = clusterVersion != null ? Version.fromString(clusterVersion) : null;
-
-					LOG.info("Version Spring Data Elasticsearch: {}", versionSpringDataElasticsearch.toString());
-					LOG.info("Version Elasticsearch Client in build: {}", versionESBuilt.toString());
-					LOG.info("Version Elasticsearch Client used: {}", versionESUsed.toString());
-
-					if (differInMajorOrMinor(versionESBuilt, versionESUsed)) {
-						LOG.warn("Version mismatch in between Elasticsearch Clients build/use: {} - {}", versionESBuilt,
-								versionESUsed);
-					}
-
-					if (versionESCluster != null) {
-						LOG.info("Version Elasticsearch cluster: {}", versionESCluster.toString());
-
-						if (differInMajorOrMinor(versionESUsed, versionESCluster)) {
-							LOG.warn("Version mismatch in between Elasticsearch Client and Cluster: {} - {}", versionESUsed,
-									versionESCluster);
-						}
-					}
-				} else {
-					LOG.warn("cannot load {}", VERSION_PROPERTIES);
-				}
-			} catch (Exception e) {
-				LOG.warn("Could not log version info: {} - {}", e.getClass().getSimpleName(), e.getMessage());
-			}
+	public static Properties versionProperties() {
+		return versionProperties;
+	}
 
+	static {
+		try {
+			versionProperties = loadVersionProperties();
+		} catch (IOException e) {
+			LOG.error("Could not load {}", VERSION_PROPERTIES, e);
+			versionProperties = new Properties();
+			versionProperties.put(VERSION_SPRING_DATA_ELASTICSEARCH, "0.0.0");
+			versionProperties.put(VERSION_ELASTICSEARCH_CLIENT, "0.0.0");
 		}
 	}
 
-	public static Properties versionProperties() throws Exception {
+	/**
+	 * logs the relevant version info.
+	 *
+	 * @param clusterVersion the version of the cluster
+	 */
+	public static void logVersions(@Nullable String clusterVersion) {
 		try {
-			InputStream resource = VersionInfo.class.getClassLoader().getResourceAsStream(VERSION_PROPERTIES);
-			if (resource != null) {
-				Properties properties = new Properties();
-				properties.load(resource);
-				return properties;
-			} else {
-				throw new IllegalStateException("Resource not found");
+
+			String versionSpringDataElasticsearch = versionProperties.getProperty(VERSION_SPRING_DATA_ELASTICSEARCH);
+			Version versionESBuilt = Version.fromString(versionProperties.getProperty(VERSION_ELASTICSEARCH_CLIENT));
+			Version versionESUsed = Version.CURRENT;
+			Version versionESCluster = clusterVersion != null ? Version.fromString(clusterVersion) : null;
+
+			LOG.info("Version Spring Data Elasticsearch: {}", versionSpringDataElasticsearch.toString());
+			LOG.info("Version Elasticsearch Client in build: {}", versionESBuilt.toString());
+			LOG.info("Version Elasticsearch Client used: {}", versionESUsed.toString());
+
+			if (differInMajorOrMinor(versionESBuilt, versionESUsed)) {
+				LOG.warn("Version mismatch in between Elasticsearch Clients build/use: {} - {}", versionESBuilt, versionESUsed);
+			}
+
+			if (versionESCluster != null) {
+				LOG.info("Version Elasticsearch cluster: {}", versionESCluster.toString());
+
+				if (differInMajorOrMinor(versionESUsed, versionESCluster)) {
+					LOG.warn("Version mismatch in between Elasticsearch Client and Cluster: {} - {}", versionESUsed,
+							versionESCluster);
+				}
 			}
 		} catch (Exception e) {
-			LOG.error("Could not load {}", VERSION_PROPERTIES, e);
-			throw e;
+			LOG.warn("Could not log version info: {} - {}", e.getClass().getSimpleName(), e.getMessage());
+		}
+	}
+
+	/**
+	 * gets the version properties from the classpath resource.
+	 *
+	 * @return version properties
+	 * @throws IOException when an error occurs
+	 */
+	private static Properties loadVersionProperties() throws IOException {
+		InputStream resource = VersionInfo.class.getClassLoader().getResourceAsStream(VERSION_PROPERTIES);
+		if (resource != null) {
+			Properties properties = new Properties();
+			properties.load(resource);
+			return properties;
+		} else {
+			throw new IllegalStateException("Resource not found");
 		}
 	}
 

src/test/java/org/springframework/data/elasticsearch/blockhound/BlockHoundIntegrationCustomizer.java

@@ -16,23 +16,26 @@
 package org.springframework.data.elasticsearch.blockhound;
 
 import reactor.blockhound.BlockHound;
+import reactor.blockhound.BlockingOperationError;
 import reactor.blockhound.integration.BlockHoundIntegration;
 
 import org.elasticsearch.Build;
 import org.elasticsearch.common.xcontent.XContentBuilder;
-import org.springframework.data.elasticsearch.support.VersionInfo;
 
 /**
  * @author Peter-Josef Meisch
  */
 public class BlockHoundIntegrationCustomizer implements BlockHoundIntegration {
+
 	@Override
 	public void applyTo(BlockHound.Builder builder) {
 		// Elasticsearch classes reading from the classpath on initialization, needed for parsing Elasticsearch responses
 		builder.allowBlockingCallsInside(XContentBuilder.class.getName(), "<clinit>")
 				.allowBlockingCallsInside(Build.class.getName(), "<clinit>");
 
-		// Spring Data Elasticsearch classes reading from the classpath
-		builder.allowBlockingCallsInside(VersionInfo.class.getName(), "logVersions");
+		builder.blockingMethodCallback(it -> {
+			throw new BlockingOperationError(it);
+		});
+
 	}
 }

src/test/java/org/springframework/data/elasticsearch/core/ReactiveElasticsearchTemplateUnitTests.java

@@ -74,10 +74,6 @@ public class ReactiveElasticsearchTemplateUnitTests {
 
 	@BeforeEach
 	public void setUp() {
-
-		when(client.info()).thenReturn(Mono.just(new MainResponse("mockNodename", org.elasticsearch.Version.CURRENT,
-				new ClusterName("mockCluster"), "mockUuid", null)));
-
 		template = new ReactiveElasticsearchTemplate(client);
 	}
 

src/test/java/org/springframework/data/elasticsearch/core/index/ReactiveMappingBuilderTests.java

@@ -15,43 +15,67 @@
  */
 package org.springframework.data.elasticsearch.core.index;
 
+import static org.skyscreamer.jsonassert.JSONAssert.*;
 import static org.springframework.data.elasticsearch.annotations.FieldType.*;
 
+import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
+
 import java.time.Instant;
 
+import org.json.JSONException;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.elasticsearch.annotations.DateFormat;
 import org.springframework.data.elasticsearch.annotations.Document;
 import org.springframework.data.elasticsearch.annotations.Field;
 import org.springframework.data.elasticsearch.annotations.Mapping;
-import org.springframework.data.elasticsearch.core.ReactiveElasticsearchOperations;
-import org.springframework.data.elasticsearch.core.ReactiveIndexOperations;
-import org.springframework.data.elasticsearch.junit.jupiter.ReactiveElasticsearchRestTemplateConfiguration;
-import org.springframework.data.elasticsearch.junit.jupiter.SpringIntegrationTest;
+import org.springframework.data.elasticsearch.core.MappingContextBaseTests;
 import org.springframework.lang.Nullable;
-import org.springframework.test.context.ContextConfiguration;
 
 /**
  * @author Peter-Josef Meisch
  */
-@SpringIntegrationTest
-@ContextConfiguration(classes = { ReactiveElasticsearchRestTemplateConfiguration.class })
-public class ReactiveMappingBuilderIntegrationTests {
+public class ReactiveMappingBuilderTests extends MappingContextBaseTests {
 
-	@Autowired private ReactiveElasticsearchOperations operations;
+	ReactiveMappingBuilder getReactiveMappingBuilder() {
+		return new ReactiveMappingBuilder(elasticsearchConverter.get());
+	}
 
-	@Test // #1822
+	@Test // #1822, #1824
 	@DisplayName("should write runtime fields")
-	void shouldWriteRuntimeFields() {
+	void shouldWriteRuntimeFields() throws JSONException {
 
-		ReactiveIndexOperations indexOps = operations.indexOps(RuntimeFieldEntity.class);
+		ReactiveMappingBuilder mappingBuilder = getReactiveMappingBuilder();
 
-		indexOps.create().block();
-		indexOps.putMapping().block();
-		indexOps.delete().block();
+		String expected = "{\n" + //
+				"  \"runtime\": {\n" + //
+				"    \"day_of_week\": {\n" + //
+				"      \"type\": \"keyword\",\n" + //
+				"      \"script\": {\n" + //
+				"        \"source\": \"emit(doc['@timestamp'].value.dayOfWeekEnum.getDisplayName(TextStyle.FULL, Locale.ROOT))\"\n"
+				+ //
+				"      }\n" + //
+				"    }\n" + //
+				"  },\n" + //
+				"  \"properties\": {\n" + //
+				"    \"_class\": {\n" + //
+				"      \"type\": \"keyword\",\n" + //
+				"      \"index\": false,\n" + //
+				"      \"doc_values\": false\n" + //
+				"    },\n" + //
+				"    \"@timestamp\": {\n" + //
+				"      \"type\": \"date\",\n" + //
+				"      \"format\": \"epoch_millis\"\n" + //
+				"    }\n" + //
+				"  }\n" + //
+				"}\n"; //
+
+		String mapping = Mono.defer(() -> mappingBuilder.buildReactivePropertyMapping(RuntimeFieldEntity.class))
+				.subscribeOn(Schedulers.parallel()).block();
+
+		assertEquals(expected, mapping, true);
 	}
 
 	// region entities

src/test/java/org/springframework/data/elasticsearch/support/VersionInfoTest.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.data.elasticsearch.support;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.io.IOException;
+import java.util.Properties;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author Peter-Josef Meisch
+ */
+class VersionInfoTest {
+
+	@Test // #1824
+	@DisplayName("should read version properties")
+	void shouldReadVersionProperties() throws IOException {
+
+		Properties properties = VersionInfo.versionProperties();
+
+		assertThat(properties).isNotNull();
+		assertThat(properties.getProperty("version.spring-data-elasticsearch")).isNotNull();
+		assertThat(properties.getProperty("version.elasticsearch-client")).isNotNull();
+	}
+}