Add auto-configuration for Spring Session's reactive support

Closes gh-9850

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/AbstractSessionCondition.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.autoconfigure.session;
 
+import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.autoconfigure.condition.ConditionMessage;
 import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
@@ -27,13 +28,20 @@ import org.springframework.core.type.AnnotatedTypeMetadata;
 import org.springframework.core.type.AnnotationMetadata;
 
 /**
- * General condition used with all session configuration classes.
+ * Base class for Servlet and reactive session conditions.
  *
  * @author Tommy Ludwig
  * @author Stephane Nicoll
  * @author Madhura Bhave
+ * @author Andy Wilkinson
  */
-class SessionCondition extends SpringBootCondition {
+class AbstractSessionCondition extends SpringBootCondition {
+
+	private final WebApplicationType webApplicationType;
+
+	protected AbstractSessionCondition(WebApplicationType webApplicationType) {
+		this.webApplicationType = webApplicationType;
+	}
 
 	@Override
 	public ConditionOutcome getMatchOutcome(ConditionContext context,
@@ -41,8 +49,8 @@ class SessionCondition extends SpringBootCondition {
 		ConditionMessage.Builder message = ConditionMessage
 				.forCondition("Session Condition");
 		Environment environment = context.getEnvironment();
-		StoreType required = SessionStoreMappings
-				.getType(((AnnotationMetadata) metadata).getClassName());
+		StoreType required = SessionStoreMappings.getType(this.webApplicationType,
+				((AnnotationMetadata) metadata).getClassName());
 		if (!environment.containsProperty("spring.session.store-type")) {
 			return ConditionOutcome.match(message.didNotFind("property", "properties")
 					.items(ConditionMessage.Style.QUOTE, "spring.session.store-type"));

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/HazelcastSessionConfiguration.java

@@ -41,7 +41,7 @@ import org.springframework.session.hazelcast.config.annotation.web.http.Hazelcas
 @ConditionalOnClass(HazelcastSessionRepository.class)
 @ConditionalOnMissingBean(SessionRepository.class)
 @ConditionalOnBean(HazelcastInstance.class)
-@Conditional(SessionCondition.class)
+@Conditional(ServletSessionCondition.class)
 @EnableConfigurationProperties(HazelcastSessionProperties.class)
 class HazelcastSessionConfiguration {
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/JdbcSessionConfiguration.java

@@ -43,7 +43,7 @@ import org.springframework.session.jdbc.config.annotation.web.http.JdbcHttpSessi
 @ConditionalOnClass({ JdbcTemplate.class, JdbcOperationsSessionRepository.class })
 @ConditionalOnMissingBean(SessionRepository.class)
 @ConditionalOnBean(DataSource.class)
-@Conditional(SessionCondition.class)
+@Conditional(ServletSessionCondition.class)
 @EnableConfigurationProperties(JdbcSessionProperties.class)
 class JdbcSessionConfiguration {
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/MongoReactiveSessionConfiguration.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.mongodb.core.ReactiveMongoOperations;
+import org.springframework.session.ReactiveSessionRepository;
+import org.springframework.session.data.mongo.config.annotation.web.reactive.ReactiveMongoWebSessionConfiguration;
+
+/**
+ * Mongo-backed reactive session configuration.
+ *
+ * @author Andy Wilkinson
+ */
+@Configuration
+@ConditionalOnClass(ReactiveMongoWebSessionConfiguration.class)
+@ConditionalOnMissingBean(ReactiveSessionRepository.class)
+@ConditionalOnBean(ReactiveMongoOperations.class)
+@Conditional(ReactiveSessionCondition.class)
+@EnableConfigurationProperties(MongoSessionProperties.class)
+class MongoReactiveSessionConfiguration {
+
+	@Configuration
+	static class SpringBootReactiveMongoWebSessionConfiguration
+			extends ReactiveMongoWebSessionConfiguration {
+
+		@Autowired
+		public void customize(SessionProperties sessionProperties,
+				MongoSessionProperties mongoSessionProperties) {
+			Integer timeout = sessionProperties.getTimeout();
+			if (timeout != null) {
+				setMaxInactiveIntervalInSeconds(timeout);
+			}
+			setCollectionName(mongoSessionProperties.getCollectionName());
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/MongoSessionConfiguration.java

@@ -37,7 +37,7 @@ import org.springframework.session.data.mongo.config.annotation.web.http.MongoHt
 @ConditionalOnClass(MongoHttpSessionConfiguration.class)
 @ConditionalOnMissingBean(SessionRepository.class)
 @ConditionalOnBean(MongoOperations.class)
-@Conditional(SessionCondition.class)
+@Conditional(ServletSessionCondition.class)
 @EnableConfigurationProperties(MongoSessionProperties.class)
 class MongoSessionConfiguration {
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/NoOpReactiveSessionConfiguration.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.session.ReactiveSessionRepository;
+
+/**
+ * No-op session configuration used to disable Spring Session using the environment.
+ *
+ * @author Tommy Ludwig
+ * @author Andy Wilkinson
+ */
+@Configuration
+@ConditionalOnMissingBean(ReactiveSessionRepository.class)
+@Conditional(ReactiveSessionCondition.class)
+class NoOpReactiveSessionConfiguration {
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/NoOpSessionConfiguration.java

@@ -28,7 +28,7 @@ import org.springframework.session.SessionRepository;
  */
 @Configuration
 @ConditionalOnMissingBean(SessionRepository.class)
-@Conditional(SessionCondition.class)
+@Conditional(ServletSessionCondition.class)
 class NoOpSessionConfiguration {
 
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/ReactiveSessionCondition.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.springframework.boot.WebApplicationType;
+
+/**
+ * General condition used with all reactive session configuration classes.
+ *
+ * @author Andy Wilkinson
+ */
+class ReactiveSessionCondition extends AbstractSessionCondition {
+
+	ReactiveSessionCondition() {
+		super(WebApplicationType.REACTIVE);
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/RedisReactiveSessionConfiguration.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.connection.ReactiveRedisConnectionFactory;
+import org.springframework.session.ReactiveSessionRepository;
+import org.springframework.session.data.redis.ReactiveRedisOperationsSessionRepository;
+import org.springframework.session.data.redis.config.annotation.web.server.RedisWebSessionConfiguration;
+
+/**
+ * Redis-backed reactive session configuration.
+ *
+ * @author Andy Wilkinson
+ */
+@Configuration
+@ConditionalOnClass({ ReactiveRedisConnectionFactory.class,
+		ReactiveRedisOperationsSessionRepository.class })
+@ConditionalOnMissingBean(ReactiveSessionRepository.class)
+@ConditionalOnBean(ReactiveRedisConnectionFactory.class)
+@Conditional(ReactiveSessionCondition.class)
+@EnableConfigurationProperties(RedisSessionProperties.class)
+class RedisReactiveSessionConfiguration {
+
+	@Configuration
+	static class SpringBootRedisWebSessionConfiguration
+			extends RedisWebSessionConfiguration {
+
+		private SessionProperties sessionProperties;
+
+		@Autowired
+		public void customize(SessionProperties sessionProperties,
+				RedisSessionProperties redisSessionProperties) {
+			this.sessionProperties = sessionProperties;
+			Integer timeout = this.sessionProperties.getTimeout();
+			if (timeout != null) {
+				setMaxInactiveIntervalInSeconds(timeout);
+			}
+			setRedisNamespace(redisSessionProperties.getNamespace());
+			setRedisFlushMode(redisSessionProperties.getFlushMode());
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/RedisSessionConfiguration.java

@@ -42,7 +42,7 @@ import org.springframework.session.data.redis.config.annotation.web.http.RedisHt
 @ConditionalOnClass({ RedisTemplate.class, RedisOperationsSessionRepository.class })
 @ConditionalOnMissingBean(SessionRepository.class)
 @ConditionalOnBean(RedisConnectionFactory.class)
-@Conditional(SessionCondition.class)
+@Conditional(ServletSessionCondition.class)
 @EnableConfigurationProperties(RedisSessionProperties.class)
 class RedisSessionConfiguration {
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/ServletSessionCondition.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.springframework.boot.WebApplicationType;
+
+/**
+ * General condition used with all servlet session configuration classes.
+ *
+ * @author Tommy Ludwig
+ * @author Stephane Nicoll
+ * @author Madhura Bhave
+ * @author Andy Wilkinson
+ */
+class ServletSessionCondition extends AbstractSessionCondition {
+
+	ServletSessionCondition() {
+		super(WebApplicationType.SERVLET);
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/SessionAutoConfiguration.java

@@ -17,11 +17,13 @@
 package org.springframework.boot.autoconfigure.session;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import javax.annotation.PostConstruct;
 
 import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -43,6 +45,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.context.annotation.ImportSelector;
 import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.session.ReactiveSessionRepository;
 import org.springframework.session.Session;
 import org.springframework.session.SessionRepository;
 
@@ -69,77 +72,116 @@ public class SessionAutoConfiguration {
 
 	@Configuration
 	@ConditionalOnWebApplication(type = Type.SERVLET)
-	@Import({ SessionRepositoryConfiguration.class, SessionRepositoryValidator.class,
+	@Import({ ServletSessionRepositoryValidator.class,
 			SessionRepositoryFilterConfiguration.class })
 	static class ServletSessionConfiguration {
 
+		@Configuration
+		@ConditionalOnMissingBean(SessionRepository.class)
+		@Import({ ServletSessionRepositoryImplementationValidator.class,
+				ServletSessionConfigurationImportSelector.class })
+		static class ServletSessionRepositoryConfiguration {
+
+		}
+
 	}
 
 	@Configuration
 	@ConditionalOnWebApplication(type = Type.REACTIVE)
+	@Import(ReactiveSessionRepositoryValidator.class)
 	static class ReactiveSessionConfiguration {
 
-	}
+		@Configuration
+		@ConditionalOnMissingBean(ReactiveSessionRepository.class)
+		@Import({ ReactiveSessionRepositoryImplementationValidator.class,
+				ReactiveSessionConfigurationImportSelector.class })
+		static class ReactiveSessionRepositoryConfiguration {
 
-	@Configuration
-	@ConditionalOnMissingBean(SessionRepository.class)
-	@Import({ SessionRepositoryImplementationValidator.class,
-			SessionConfigurationImportSelector.class })
-	static class SessionRepositoryConfiguration {
-
-	}
-
-	/**
-	 * {@link ImportSelector} to add {@link StoreType} configuration classes.
-	 */
-	static class SessionConfigurationImportSelector implements ImportSelector {
-
-		@Override
-		public String[] selectImports(AnnotationMetadata importingClassMetadata) {
-			StoreType[] types = StoreType.values();
-			String[] imports = new String[types.length];
-			for (int i = 0; i < types.length; i++) {
-				imports[i] = SessionStoreMappings.getConfigurationClass(types[i]);
-			}
-			return imports;
 		}
 
 	}
 
 	/**
-	 * Bean used to validate that only one supported implementation is available in the
-	 * classpath when the store-type property is not set.
+	 * {@link ImportSelector} base class to add {@link StoreType} configuration classes.
 	 */
-	static class SessionRepositoryImplementationValidator {
+	static abstract class SessionConfigurationImportSelector implements ImportSelector {
+
+		protected final String[] selectImports(AnnotationMetadata importingClassMetadata,
+				WebApplicationType webApplicationType) {
+			List<String> imports = new ArrayList<>();
+			StoreType[] types = StoreType.values();
+			for (int i = 0; i < types.length; i++) {
+				imports.add(SessionStoreMappings.getConfigurationClass(webApplicationType,
+						types[i]));
+			}
+			return imports.toArray(new String[imports.size()]);
+		}
+
+	}
+
+	/**
+	 * {@link ImportSelector} to add {@link StoreType} configuration classes for reactive
+	 * web applications.
+	 */
+	static class ReactiveSessionConfigurationImportSelector
+			extends SessionConfigurationImportSelector {
+
+		@Override
+		public String[] selectImports(AnnotationMetadata importingClassMetadata) {
+			return super.selectImports(importingClassMetadata,
+					WebApplicationType.REACTIVE);
+		}
+
+	}
+
+	/**
+	 * {@link ImportSelector} to add {@link StoreType} configuration classes for Servlet
+	 * web applications.
+	 */
+	static class ServletSessionConfigurationImportSelector
+			extends SessionConfigurationImportSelector {
+
+		@Override
+		public String[] selectImports(AnnotationMetadata importingClassMetadata) {
+			return super.selectImports(importingClassMetadata,
+					WebApplicationType.SERVLET);
+		}
+
+	}
+
+	/**
+	 * Base class for beans used to validate that only one supported implementation is
+	 * available in the classpath when the store-type property is not set.
+	 */
+	static class AbstractSessionRepositoryImplementationValidator {
+
+		private final List<String> candidates;
 
 		private final ClassLoader classLoader;
 
 		private final SessionProperties sessionProperties;
 
-		SessionRepositoryImplementationValidator(ApplicationContext applicationContext,
-				SessionProperties sessionProperties) {
+		AbstractSessionRepositoryImplementationValidator(
+				ApplicationContext applicationContext,
+				SessionProperties sessionProperties, List<String> candidates) {
 			this.classLoader = applicationContext.getClassLoader();
 			this.sessionProperties = sessionProperties;
+			this.candidates = candidates;
 		}
 
 		@PostConstruct
 		public void checkAvailableImplementations() {
-			List<Class<?>> candidates = new ArrayList<>();
-			addCandidate(candidates,
-					"org.springframework.session.hazelcast.HazelcastSessionRepository");
-			addCandidate(candidates,
-					"org.springframework.session.jdbc.JdbcOperationsSessionRepository");
-			addCandidate(candidates,
-					"org.springframework.session.data.mongo.MongoOperationsSessionRepository");
-			addCandidate(candidates,
-					"org.springframework.session.data.redis.RedisOperationsSessionRepository");
+			List<Class<?>> availableCandidates = new ArrayList<>();
+			for (String candidate : this.candidates) {
+				addCandidateIfAvailable(availableCandidates, candidate);
+			}
 			StoreType storeType = this.sessionProperties.getStoreType();
-			if (candidates.size() > 1 && storeType == null) {
-				throw new NonUniqueSessionRepositoryException(candidates);
+			if (availableCandidates.size() > 1 && storeType == null) {
+				throw new NonUniqueSessionRepositoryException(availableCandidates);
 			}
 		}
 
-		private void addCandidate(List<Class<?>> candidates, String type) {
+		private void addCandidateIfAvailable(List<Class<?>> candidates, String type) {
 			try {
 				Class<?> candidate = this.classLoader.loadClass(type);
 				if (candidate != null) {
@@ -153,17 +195,52 @@ public class SessionAutoConfiguration {
 	}
 
 	/**
-	 * Bean used to validate that a {@link SessionRepository} exists and provide a
-	 * meaningful message if that's not the case.
+	 * Bean used to validate that only one supported implementation is available in the
+	 * classpath when the store-type property is not set.
 	 */
-	static class SessionRepositoryValidator {
+	static class ServletSessionRepositoryImplementationValidator
+			extends AbstractSessionRepositoryImplementationValidator {
 
-		private SessionProperties sessionProperties;
+		ServletSessionRepositoryImplementationValidator(
+				ApplicationContext applicationContext,
+				SessionProperties sessionProperties) {
+			super(applicationContext, sessionProperties, Arrays.asList(
+					"org.springframework.session.hazelcast.HazelcastSessionRepository",
+					"org.springframework.session.jdbc.JdbcOperationsSessionRepository",
+					"org.springframework.session.data.mongo.MongoOperationsSessionRepository",
+					"org.springframework.session.data.redis.RedisOperationsSessionRepository"));
+		}
 
-		private ObjectProvider<SessionRepository<?>> sessionRepositoryProvider;
+	}
 
-		SessionRepositoryValidator(SessionProperties sessionProperties,
-				ObjectProvider<SessionRepository<?>> sessionRepositoryProvider) {
+	/**
+	 * Bean used to validate that only one supported implementation is available in the
+	 * classpath when the store-type property is not set.
+	 */
+	static class ReactiveSessionRepositoryImplementationValidator
+			extends AbstractSessionRepositoryImplementationValidator {
+
+		ReactiveSessionRepositoryImplementationValidator(
+				ApplicationContext applicationContext,
+				SessionProperties sessionProperties) {
+			super(applicationContext, sessionProperties, Arrays.asList(
+					"org.springframework.session.data.redis.ReactiveRedisOperationsSessionRepository",
+					"org.springframework.session.data.mongo.ReactiveMongoOperationsSessionRepository"));
+		}
+
+	}
+
+	/**
+	 * Base class for validating that a (reactive) session repository bean exists.
+	 */
+	static class AbstractSessionRepositoryValidator {
+
+		private final SessionProperties sessionProperties;
+
+		private final ObjectProvider<?> sessionRepositoryProvider;
+
+		protected AbstractSessionRepositoryValidator(SessionProperties sessionProperties,
+				ObjectProvider<?> sessionRepositoryProvider) {
 			this.sessionProperties = sessionProperties;
 			this.sessionRepositoryProvider = sessionRepositoryProvider;
 		}
@@ -184,4 +261,32 @@ public class SessionAutoConfiguration {
 
 	}
 
+	/**
+	 * Bean used to validate that a {@link SessionRepository} exists and provide a
+	 * meaningful message if that's not the case.
+	 */
+	static class ServletSessionRepositoryValidator
+			extends AbstractSessionRepositoryValidator {
+
+		ServletSessionRepositoryValidator(SessionProperties sessionProperties,
+				ObjectProvider<SessionRepository<?>> sessionRepositoryProvider) {
+			super(sessionProperties, sessionRepositoryProvider);
+		}
+
+	}
+
+	/**
+	 * Bean used to validate that a {@link SessionRepository} exists and provide a
+	 * meaningful message if that's not the case.
+	 */
+	static class ReactiveSessionRepositoryValidator
+			extends AbstractSessionRepositoryValidator {
+
+		ReactiveSessionRepositoryValidator(SessionProperties sessionProperties,
+				ObjectProvider<ReactiveSessionRepository<?>> sessionRepositoryProvider) {
+			super(sessionProperties, sessionRepositoryProvider);
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/SessionStoreMappings.java

@@ -20,6 +20,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.springframework.boot.WebApplicationType;
 import org.springframework.util.Assert;
 
 /**
@@ -30,32 +31,62 @@ import org.springframework.util.Assert;
  */
 final class SessionStoreMappings {
 
-	private static final Map<StoreType, Class<?>> MAPPINGS;
+	private static final Map<StoreType, Map<WebApplicationType, Class<?>>> MAPPINGS;
 
 	static {
-		Map<StoreType, Class<?>> mappings = new HashMap<>();
-		mappings.put(StoreType.REDIS, RedisSessionConfiguration.class);
-		mappings.put(StoreType.MONGODB, MongoSessionConfiguration.class);
-		mappings.put(StoreType.JDBC, JdbcSessionConfiguration.class);
-		mappings.put(StoreType.HAZELCAST, HazelcastSessionConfiguration.class);
-		mappings.put(StoreType.NONE, NoOpSessionConfiguration.class);
+		Map<StoreType, Map<WebApplicationType, Class<?>>> mappings = new HashMap<>();
+		mappings.put(StoreType.REDIS, createMapping(RedisSessionConfiguration.class,
+				RedisReactiveSessionConfiguration.class));
+		mappings.put(StoreType.MONGODB, createMapping(MongoSessionConfiguration.class,
+				MongoReactiveSessionConfiguration.class));
+		mappings.put(StoreType.JDBC, createMapping(JdbcSessionConfiguration.class));
+		mappings.put(StoreType.HAZELCAST,
+				createMapping(HazelcastSessionConfiguration.class));
+		mappings.put(StoreType.NONE, createMapping(NoOpSessionConfiguration.class,
+				NoOpReactiveSessionConfiguration.class));
 		MAPPINGS = Collections.unmodifiableMap(mappings);
 	}
 
+	static Map<WebApplicationType, Class<?>> createMapping(
+			Class<?> servletConfiguration) {
+		return createMapping(servletConfiguration, null);
+	}
+
+	static Map<WebApplicationType, Class<?>> createMapping(Class<?> servletConfiguration,
+			Class<?> reactiveConfiguration) {
+		Map<WebApplicationType, Class<?>> mapping = new HashMap<>();
+		mapping.put(WebApplicationType.SERVLET, servletConfiguration);
+		if (reactiveConfiguration != null) {
+			mapping.put(WebApplicationType.REACTIVE, reactiveConfiguration);
+		}
+		return mapping;
+	}
+
 	private SessionStoreMappings() {
 	}
 
-	static String getConfigurationClass(StoreType sessionStoreType) {
-		Class<?> configurationClass = MAPPINGS.get(sessionStoreType);
-		Assert.state(configurationClass != null,
+	static String getConfigurationClass(WebApplicationType webApplicationType,
+			StoreType sessionStoreType) {
+		Map<WebApplicationType, Class<?>> configurationClasses = MAPPINGS
+				.get(sessionStoreType);
+		Assert.state(configurationClasses != null,
 				() -> "Unknown session store type " + sessionStoreType);
+		Class<?> configurationClass = configurationClasses.get(webApplicationType);
+		if (configurationClass == null) {
+			return null;
+		}
 		return configurationClass.getName();
 	}
 
-	static StoreType getType(String configurationClassName) {
-		for (Map.Entry<StoreType, Class<?>> entry : MAPPINGS.entrySet()) {
-			if (entry.getValue().getName().equals(configurationClassName)) {
-				return entry.getKey();
+	static StoreType getType(WebApplicationType webApplicationType,
+			String configurationClassName) {
+		for (Map.Entry<StoreType, Map<WebApplicationType, Class<?>>> storeEntry : MAPPINGS
+				.entrySet()) {
+			for (Map.Entry<WebApplicationType, Class<?>> entry : storeEntry.getValue()
+					.entrySet()) {
+				if (entry.getValue().getName().equals(configurationClassName)) {
+					return storeEntry.getKey();
+				}
 			}
 		}
 		throw new IllegalStateException(

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/HttpHandlerAutoConfiguration.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.autoconfigure.web.reactive;
 
-import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.AutoConfigureOrder;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -30,14 +29,12 @@ import org.springframework.core.Ordered;
 import org.springframework.http.server.reactive.HttpHandler;
 import org.springframework.web.reactive.DispatcherHandler;
 import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
-import org.springframework.web.server.session.WebSessionManager;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for {@link HttpHandler}.
  *
  * @author Brian Clozel
  * @author Stephane Nicoll
- * @author Andy Wilkinson
  * @since 2.0.0
  */
 @Configuration
@@ -58,16 +55,9 @@ public class HttpHandlerAutoConfiguration {
 		}
 
 		@Bean
-		public HttpHandler httpHandler(
-				ObjectProvider<WebSessionManager> webSessionManagerProvider) {
-			WebHttpHandlerBuilder builder = WebHttpHandlerBuilder
-					.applicationContext(this.applicationContext);
-			WebSessionManager webSessionManager = webSessionManagerProvider
-					.getIfAvailable();
-			if (webSessionManager != null) {
-				builder.sessionManager(webSessionManager);
-			}
-			return builder.build();
+		public HttpHandler httpHandler() {
+			return WebHttpHandlerBuilder.applicationContext(this.applicationContext)
+					.build();
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/session/AbstractSessionAutoConfigurationTests.java

@@ -17,7 +17,9 @@
 package org.springframework.boot.autoconfigure.session;
 
 import org.springframework.beans.DirectFieldAccessor;
+import org.springframework.boot.test.context.assertj.AssertableReactiveWebApplicationContext;
 import org.springframework.boot.test.context.assertj.AssertableWebApplicationContext;
+import org.springframework.session.ReactiveSessionRepository;
 import org.springframework.session.SessionRepository;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -42,4 +44,18 @@ public abstract class AbstractSessionAutoConfigurationTests {
 				.getPropertyValue("defaultMaxInactiveInterval");
 	}
 
+	protected <T extends ReactiveSessionRepository<?>> T validateSessionRepository(
+			AssertableReactiveWebApplicationContext context, Class<T> type) {
+		assertThat(context).hasSingleBean(ReactiveSessionRepository.class);
+		ReactiveSessionRepository<?> repository = context
+				.getBean(ReactiveSessionRepository.class);
+		assertThat(repository).as("Wrong session repository type").isInstanceOf(type);
+		return type.cast(repository);
+	}
+
+	protected Integer getSessionTimeout(ReactiveSessionRepository<?> sessionRepository) {
+		return (Integer) new DirectFieldAccessor(sessionRepository)
+				.getPropertyValue("defaultMaxInactiveInterval");
+	}
+
 }

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/session/ReactiveSessionAutoConfigurationMongoTests.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.junit.Test;
+
+import org.springframework.beans.DirectFieldAccessor;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfiguration;
+import org.springframework.boot.test.context.HideClassesClassLoader;
+import org.springframework.boot.test.context.assertj.AssertableReactiveWebApplicationContext;
+import org.springframework.boot.test.context.runner.ContextConsumer;
+import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
+import org.springframework.session.data.mongo.ReactiveMongoOperationsSessionRepository;
+import org.springframework.session.data.redis.ReactiveRedisOperationsSessionRepository;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Mongo-specific tests for {@link SessionAutoConfiguration}.
+ *
+ * @author Andy Wilkinson
+ */
+public class ReactiveSessionAutoConfigurationMongoTests
+		extends AbstractSessionAutoConfigurationTests {
+
+	private final ReactiveWebApplicationContextRunner contextRunner = new ReactiveWebApplicationContextRunner()
+			.withConfiguration(AutoConfigurations.of(SessionAutoConfiguration.class));
+
+	@Test
+	public void defaultConfig() {
+		this.contextRunner.withPropertyValues("spring.session.store-type=mongodb")
+				.withConfiguration(AutoConfigurations.of(
+						EmbeddedMongoAutoConfiguration.class,
+						MongoAutoConfiguration.class, MongoDataAutoConfiguration.class,
+						MongoReactiveAutoConfiguration.class,
+						MongoReactiveDataAutoConfiguration.class))
+				.run(validateSpringSessionUsesMongo("sessions"));
+	}
+
+	@Test
+	public void defaultConfigWithUniqueStoreImplementation() {
+		this.contextRunner
+				.withClassLoader(new HideClassesClassLoader(
+						ReactiveRedisOperationsSessionRepository.class))
+				.withConfiguration(AutoConfigurations.of(
+						EmbeddedMongoAutoConfiguration.class,
+						MongoAutoConfiguration.class, MongoDataAutoConfiguration.class,
+						MongoReactiveAutoConfiguration.class,
+						MongoReactiveDataAutoConfiguration.class))
+				.run(validateSpringSessionUsesMongo("sessions"));
+	}
+
+	@Test
+	public void mongoSessionStoreWithCustomizations() {
+		this.contextRunner
+				.withConfiguration(AutoConfigurations.of(
+						EmbeddedMongoAutoConfiguration.class,
+						MongoAutoConfiguration.class, MongoDataAutoConfiguration.class,
+						MongoReactiveAutoConfiguration.class,
+						MongoReactiveDataAutoConfiguration.class))
+				.withPropertyValues("spring.session.store-type=mongodb",
+						"spring.session.mongodb.collection-name=foo")
+				.run(validateSpringSessionUsesMongo("foo"));
+	}
+
+	private ContextConsumer<AssertableReactiveWebApplicationContext> validateSpringSessionUsesMongo(
+			String collectionName) {
+		return (context) -> {
+			ReactiveMongoOperationsSessionRepository repository = validateSessionRepository(
+					context, ReactiveMongoOperationsSessionRepository.class);
+			assertThat(new DirectFieldAccessor(repository)
+					.getPropertyValue("collectionName")).isEqualTo(collectionName);
+		};
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/session/ReactiveSessionAutoConfigurationRedisTests.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2012-2017 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
+ *
+ *      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.springframework.boot.autoconfigure.session;
+
+import org.junit.Rule;
+import org.junit.Test;
+
+import org.springframework.beans.DirectFieldAccessor;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport;
+import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration;
+import org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportMessage;
+import org.springframework.boot.test.context.HideClassesClassLoader;
+import org.springframework.boot.test.context.assertj.AssertableReactiveWebApplicationContext;
+import org.springframework.boot.test.context.runner.ContextConsumer;
+import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
+import org.springframework.boot.testsupport.rule.RedisTestServer;
+import org.springframework.session.data.mongo.ReactiveMongoOperationsSessionRepository;
+import org.springframework.session.data.redis.ReactiveRedisOperationsSessionRepository;
+import org.springframework.session.data.redis.RedisFlushMode;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Reactive Redis-specific tests for {@link SessionAutoConfiguration}.
+ *
+ * @author Stephane Nicoll
+ * @author Andy Wilkinson
+ */
+public class ReactiveSessionAutoConfigurationRedisTests
+		extends AbstractSessionAutoConfigurationTests {
+
+	@Rule
+	public final RedisTestServer redis = new RedisTestServer();
+
+	protected final ReactiveWebApplicationContextRunner contextRunner = new ReactiveWebApplicationContextRunner()
+			.withConfiguration(AutoConfigurations.of(SessionAutoConfiguration.class));
+
+	@Test
+	public void defaultConfig() {
+		this.contextRunner.withPropertyValues("spring.session.store-type=redis")
+				.withConfiguration(AutoConfigurations.of(RedisAutoConfiguration.class,
+						RedisReactiveAutoConfiguration.class))
+				.run(validateSpringSessionUsesRedis(RedisFlushMode.ON_SAVE));
+	}
+
+	@Test
+	public void defaultConfigWithUniqueStoreImplementation() {
+		this.contextRunner
+				.withClassLoader(new HideClassesClassLoader(
+						ReactiveMongoOperationsSessionRepository.class))
+				.withConfiguration(AutoConfigurations.of(RedisAutoConfiguration.class,
+						RedisReactiveAutoConfiguration.class))
+				.run(validateSpringSessionUsesRedis(RedisFlushMode.ON_SAVE));
+	}
+
+	@Test
+	public void redisSessionStoreWithCustomizations() {
+		this.contextRunner
+				.withConfiguration(AutoConfigurations.of(RedisAutoConfiguration.class,
+						RedisReactiveAutoConfiguration.class))
+				.withPropertyValues("spring.session.store-type=redis",
+						"spring.session.redis.namespace=foo",
+						"spring.session.redis.flush-mode=immediate")
+				.run(validateSpringSessionUsesRedis(RedisFlushMode.IMMEDIATE));
+	}
+
+	private ContextConsumer<AssertableReactiveWebApplicationContext> validateSpringSessionUsesRedis(
+			RedisFlushMode flushMode) {
+		return (context) -> {
+			System.out.println(new ConditionEvaluationReportMessage(
+					context.getBean(ConditionEvaluationReport.class)));
+			ReactiveRedisOperationsSessionRepository repository = validateSessionRepository(
+					context, ReactiveRedisOperationsSessionRepository.class);
+			assertThat(new DirectFieldAccessor(repository)
+					.getPropertyValue("redisFlushMode")).isEqualTo(flushMode);
+		};
+	}
+
+}

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -157,7 +157,7 @@
 		<spring-retry.version>1.2.1.RELEASE</spring-retry.version>
 		<spring-security.version>5.0.0.BUILD-SNAPSHOT</spring-security.version>
 		<spring-session.version>2.0.0.BUILD-SNAPSHOT</spring-session.version>
-		<spring-session-data-mongodb.version>2.0.0.M4</spring-session-data-mongodb.version>
+		<spring-session-data-mongodb.version>2.0.0.BUILD-SNAPSHOT</spring-session-data-mongodb.version>
 		<spring-social.version>2.0.0.M4</spring-social.version>
 		<spring-social-facebook.version>3.0.0.M3</spring-social-facebook.version>
 		<spring-social-linkedin.version>2.0.0.M3</spring-social-linkedin.version>

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -5506,13 +5506,19 @@ classes for more details.
 
 [[boot-features-session]]
 == Spring Session
-Spring Boot provides Spring Session auto-configuration for a wide range of stores:
+Spring Boot provides Spring Session auto-configuration for a wide range of stores. When
+building a Servlet web application, the following stores can be auto-configured:
 
 * JDBC
 * Redis
 * Hazelcast
 * MongoDB
 
+When building a reactive web applicaiton, the following stores can be auto-configured:
+
+* Redis
+* MongoDB
+
 If Spring Session is available, you must choose the
 {sc-spring-boot-autoconfigure}/session/StoreType.{sc-ext}[`StoreType`] that you wish to
 use to store the sessions. For instance to use JDBC as backend store, you'd configure