Add EnableSpringHttpSession

Fixes gh-231

spring-session/src/main/java/org/springframework/session/config/annotation/web/http/EnableSpringHttpSession.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2002-2015 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.session.config.annotation.web.http;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.session.SessionRepository;
+import org.springframework.session.events.SessionCreatedEvent;
+import org.springframework.session.events.SessionDestroyedEvent;
+
+/**
+ * Add this annotation to an {@code @Configuration} class to expose the
+ * SessionRepositoryFilter as a bean named "springSessionRepositoryFilter" and
+ * backed by a user provided implementation of {@link SessionRepository}. In
+ * order to leverage the annotation, a single {@link SessionRepository} bean
+ * must be provided. For example:
+ *
+ * <pre>
+ * <code>
+ * {@literal @Configuration}
+ * {@literal @EnableSpringHttpSession}
+ * public class SpringHttpSessionConfig {
+ *
+ *     {@literal @Bean}
+ *     public MapSessionRepository sessionRepository() {
+ *         return new MapSessionRepository();
+ *     }
+ *
+ * }
+ * </code>
+ * </pre>
+ *
+ * <p>
+ * It is important to note that no infrastructure for session expirations is
+ * configured for you out of the box. This is because things like session
+ * expiration are highly implementation dependent. This means if you require
+ * cleaning up expired sessions, you are responsible for cleaning up the expired
+ * sessions.
+ * </p>
+ *
+ * <p>
+ * The following is provided for you with the base configuration:
+ * </p>
+ *
+ * <ul>
+ * <li>SessionRepositoryFilter - is responsible for wrapping the
+ * HttpServletRequest with an implementation of HttpSession that is backed by a
+ * SessionRepository</li>
+ * <li>SessionEventHttpSessionListenerAdapter - is responsible for translating
+ * Spring Session events into HttpSessionEvent. In order for it to work, the
+ * implementation of SessionRepository you provide must support
+ * {@link SessionCreatedEvent} and {@link SessionDestroyedEvent}.</li>
+ * <li>
+ * </ul>
+ *
+ * @author Rob Winch
+ * @since 1.0
+ */
+@Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME)
+@Target(value = { java.lang.annotation.ElementType.TYPE })
+@Documented
+@Import(SpringHttpSessionConfiguration.class)
+@Configuration
+public @interface EnableSpringHttpSession {
+}

spring-session/src/main/java/org/springframework/session/config/annotation/web/http/SpringHttpSessionConfiguration.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2002-2015 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.session.config.annotation.web.http;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpSessionListener;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.session.ExpiringSession;
+import org.springframework.session.SessionRepository;
+import org.springframework.session.events.SessionCreatedEvent;
+import org.springframework.session.events.SessionDestroyedEvent;
+import org.springframework.session.web.http.HttpSessionStrategy;
+import org.springframework.session.web.http.SessionEventHttpSessionListenerAdapter;
+import org.springframework.session.web.http.SessionRepositoryFilter;
+
+/**
+ * Configures the basics for setting up Spring Session in a web environment. In
+ * order to use it, you must provide a {@link SessionRepository}. For example:
+ *
+ * <pre>
+ * {@literal @Configuration}
+ * {@literal @EnableSpringHttpSession}
+ * public class SpringHttpSessionConfig {
+ *
+ *     {@literal @Bean}
+ *     public MapSessionRepository sessionRepository() {
+ *         return new MapSessionRepository();
+ *     }
+ *
+ * }
+ * </pre>
+ *
+ * <p>
+ * It is important to note that no infrastructure for session expirations is
+ * configured for you out of the box. This is because things like session
+ * expiration are highly implementation dependent. This means if you require
+ * cleaning up expired sessions, you are responsible for cleaning up the expired
+ * sessions.
+ * </p>
+ *
+ * <p>
+ * The following is provided for you with the base configuration:
+ * </p>
+ *
+ * <ul>
+ * <li>SessionRepositoryFilter - is responsible for wrapping the
+ * HttpServletRequest with an implementation of HttpSession that is backed by a
+ * SessionRepository</li>
+ * <li>SessionEventHttpSessionListenerAdapter - is responsible for translating
+ * Spring Session events into HttpSessionEvent. In order for it to work, the
+ * implementation of SessionRepository you provide must support
+ * {@link SessionCreatedEvent} and {@link SessionDestroyedEvent}.</li>
+ * <li>
+ * </ul>
+ *
+ * @author Rob Winch
+ * @since 1.1
+ *
+ * @see EnableSpringHttpSession
+ */
+@Configuration
+@EnableScheduling
+public class SpringHttpSessionConfiguration {
+
+	private HttpSessionStrategy httpSessionStrategy;
+
+	private List<HttpSessionListener> httpSessionListeners = new ArrayList<HttpSessionListener>();
+
+	@Bean
+	public SessionEventHttpSessionListenerAdapter sessionEventHttpSessionListenerAdapter() {
+		return new SessionEventHttpSessionListenerAdapter(httpSessionListeners);
+	}
+
+	@Bean
+	public <S extends ExpiringSession> SessionRepositoryFilter<? extends ExpiringSession> springSessionRepositoryFilter(SessionRepository<S> sessionRepository, ServletContext servletContext) {
+		SessionRepositoryFilter<S> sessionRepositoryFilter = new SessionRepositoryFilter<S>(sessionRepository);
+		sessionRepositoryFilter.setServletContext(servletContext);
+		if(httpSessionStrategy != null) {
+			sessionRepositoryFilter.setHttpSessionStrategy(httpSessionStrategy);
+		}
+		return sessionRepositoryFilter;
+	}
+
+	@Autowired(required = false)
+	public void setHttpSessionStrategy(HttpSessionStrategy httpSessionStrategy) {
+		this.httpSessionStrategy = httpSessionStrategy;
+	}
+
+	@Autowired(required = false)
+	public void setHttpSessionListeners(List<HttpSessionListener> listeners) {
+		this.httpSessionListeners = listeners;
+	}
+}

spring-session/src/main/java/org/springframework/session/data/redis/config/annotation/web/http/EnableRedisHttpSession.java

@@ -22,6 +22,7 @@ import java.lang.annotation.Target;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.session.config.annotation.web.http.EnableSpringHttpSession;
 
 /**
  * Add this annotation to an {@code @Configuration} class to expose the
@@ -29,6 +30,7 @@ import org.springframework.data.redis.connection.RedisConnectionFactory;
  * backed by Redis. In order to leverage the annotation, a single {@link RedisConnectionFactory}
  * must be provided. For example:
  * <pre>
+ * <code>
  * {@literal @Configuration}
  * {@literal @EnableRedisHttpSession}
  * public class RedisHttpSessionConfig {
@@ -39,12 +41,14 @@ import org.springframework.data.redis.connection.RedisConnectionFactory;
  *     }
  *
  * }
+ * </code>
  * </pre>
  *
  * More advanced configurations can extend {@link RedisHttpSessionConfiguration} instead.
  *
  * @author Rob Winch
  * @since 1.0
+ * @see EnableSpringHttpSession
  */
 @Retention(value=java.lang.annotation.RetentionPolicy.RUNTIME)
 @Target(value={java.lang.annotation.ElementType.TYPE})

spring-session/src/main/java/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.java

@@ -15,14 +15,9 @@
  */
 package org.springframework.session.data.redis.config.annotation.web.http;
 
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.List;
 import java.util.Map;
 
-import javax.servlet.ServletContext;
-import javax.servlet.http.HttpSessionListener;
-
 import org.springframework.beans.factory.BeanClassLoaderAware;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -42,13 +37,10 @@ import org.springframework.data.redis.listener.PatternTopic;
 import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 import org.springframework.data.redis.serializer.StringRedisSerializer;
 import org.springframework.scheduling.annotation.EnableScheduling;
-import org.springframework.session.ExpiringSession;
-import org.springframework.session.SessionRepository;
+import org.springframework.session.config.annotation.web.http.SpringHttpSessionConfiguration;
 import org.springframework.session.data.redis.RedisOperationsSessionRepository;
 import org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction;
 import org.springframework.session.data.redis.config.ConfigureRedisAction;
-import org.springframework.session.web.http.HttpSessionStrategy;
-import org.springframework.session.web.http.SessionEventHttpSessionListenerAdapter;
 import org.springframework.session.web.http.SessionRepositoryFilter;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.StringUtils;
@@ -65,25 +57,16 @@ import org.springframework.util.StringUtils;
  */
 @Configuration
 @EnableScheduling
-public class RedisHttpSessionConfiguration implements ImportAware, BeanClassLoaderAware {
+public class RedisHttpSessionConfiguration extends SpringHttpSessionConfiguration implements ImportAware, BeanClassLoaderAware {
 
 	private ClassLoader beanClassLoader;
 
 	private Integer maxInactiveIntervalInSeconds = 1800;
 
-	private HttpSessionStrategy httpSessionStrategy;
-
 	private ConfigureRedisAction configureRedisAction = new ConfigureNotifyKeyspaceEventsAction();
 
-	private List<HttpSessionListener> httpSessionListeners = new ArrayList<HttpSessionListener>();
-
 	private String redisNamespace = "";
 
-	@Bean
-	public SessionEventHttpSessionListenerAdapter sessionEventHttpSessionListenerAdapter() {
-		return new SessionEventHttpSessionListenerAdapter(httpSessionListeners);
-	}
-
 	@Bean
 	public RedisMessageListenerContainer redisMessageListenerContainer(
 			RedisConnectionFactory connectionFactory, RedisOperationsSessionRepository messageListener) {
@@ -118,16 +101,6 @@ public class RedisHttpSessionConfiguration implements ImportAware, BeanClassLoad
 		return sessionRepository;
 	}
 
-	@Bean
-	public <S extends ExpiringSession> SessionRepositoryFilter<? extends ExpiringSession> springSessionRepositoryFilter(SessionRepository<S> sessionRepository, ServletContext servletContext) {
-		SessionRepositoryFilter<S> sessionRepositoryFilter = new SessionRepositoryFilter<S>(sessionRepository);
-		sessionRepositoryFilter.setServletContext(servletContext);
-		if(httpSessionStrategy != null) {
-			sessionRepositoryFilter.setHttpSessionStrategy(httpSessionStrategy);
-		}
-		return sessionRepositoryFilter;
-	}
-
 	public void setMaxInactiveIntervalInSeconds(int maxInactiveIntervalInSeconds) {
 		this.maxInactiveIntervalInSeconds = maxInactiveIntervalInSeconds;
 	}
@@ -164,16 +137,6 @@ public class RedisHttpSessionConfiguration implements ImportAware, BeanClassLoad
 		this.redisNamespace = enableAttrs.getString("redisNamespace");
 	}
 
-	@Autowired(required = false)
-	public void setHttpSessionStrategy(HttpSessionStrategy httpSessionStrategy) {
-		this.httpSessionStrategy = httpSessionStrategy;
-	}
-
-	@Autowired(required = false)
-	public void setHttpSessionListeners(List<HttpSessionListener> listeners) {
-		this.httpSessionListeners = listeners;
-	}
-
 	@Bean
 	public InitializingBean enableRedisKeyspaceNotificationsInitializer(RedisConnectionFactory connectionFactory) {
 		return new EnableRedisKeyspaceNotificationsInitializer(connectionFactory, configureRedisAction);