Add Redis implementation of ReactorSessionRepository

Closes gh-816

samples/javaconfig/webflux/spring-session-sample-javaconfig-webflux.gradle

@@ -1,7 +1,7 @@
 apply plugin: 'io.spring.convention.spring-sample'
 
 dependencies {
-	compile project(':spring-session-core')
+	compile project(':spring-session-data-redis')
 	compile 'io.lettuce:lettuce-core'
 	compile 'io.netty:netty-buffer'
 	compile 'io.projectreactor.ipc:reactor-netty'
@@ -14,6 +14,7 @@ dependencies {
 	compile 'org.webjars:webjars-taglib'
 	compile jstlDependencies
 	compile slf4jDependencies
+	compile 'org.testcontainers:testcontainers'
 
 	testCompile 'junit:junit'
 	testCompile 'org.assertj:assertj-core'

samples/javaconfig/webflux/src/integration-test/java/sample/AttributeTests.java

@@ -41,7 +41,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @RunWith(SpringRunner.class)
 @ContextConfiguration(classes = HelloWebfluxApplication.class)
-@TestPropertySource(properties = "server.port=0")
+@TestPropertySource(properties = { "spring.profiles.active=embedded-redis", "server.port=0" })
 public class AttributeTests {
 	@Value("#{@nettyContext.address().getPort()}")
 	int port;

samples/javaconfig/webflux/src/main/java/sample/EmbeddedRedisConfig.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2014-2017 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 sample;
+
+import java.io.IOException;
+
+import org.testcontainers.containers.GenericContainer;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.context.annotation.Profile;
+import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
+
+@Configuration
+@Profile("embedded-redis")
+public class EmbeddedRedisConfig {
+
+	private static final String REDIS_DOCKER_IMAGE = "redis:3.2.9";
+
+	@Bean(initMethod = "start")
+	public GenericContainer redisContainer() {
+		return new GenericContainer(REDIS_DOCKER_IMAGE) {
+
+			@Override
+			public void close() {
+				super.close();
+				try {
+					this.dockerClient.close();
+				}
+				catch (IOException ignored) {
+				}
+			}
+
+		}.withExposedPorts(6379);
+	}
+
+	@Bean
+	@Primary
+	public LettuceConnectionFactory redisConnectionFactory() {
+		return new LettuceConnectionFactory(redisContainer().getContainerIpAddress(),
+				redisContainer().getFirstMappedPort());
+	}
+
+}

samples/javaconfig/webflux/src/main/java/sample/HelloWebfluxApplication.java

@@ -25,7 +25,6 @@ import org.springframework.context.annotation.AnnotationConfigApplicationContext
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Profile;
 import org.springframework.http.server.reactive.HttpHandler;
 import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter;
 import org.springframework.web.reactive.config.EnableWebFlux;
@@ -49,7 +48,6 @@ public class HelloWebfluxApplication {
 		}
 	}
 
-	@Profile("default")
 	@Bean
 	public NettyContext nettyContext(ApplicationContext context) {
 		HttpHandler handler = WebHttpHandlerBuilder.applicationContext(context).build();

samples/javaconfig/webflux/src/main/java/sample/HelloWebfluxSessionConfig.java

@@ -16,22 +16,19 @@
 
 package sample;
 
-import java.util.concurrent.ConcurrentHashMap;
-
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.session.EnableSpringWebSession;
-import org.springframework.session.MapReactorSessionRepository;
-
+import org.springframework.context.annotation.Import;
+import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
+import org.springframework.session.data.redis.config.annotation.web.reactor.EnableRedisReactorSession;
 
+@Import(EmbeddedRedisConfig.class)
 // tag::class[]
-@Configuration
-@EnableSpringWebSession
+@EnableRedisReactorSession
 public class HelloWebfluxSessionConfig {
 
 	@Bean
-	public MapReactorSessionRepository reactorSessionRepository() {
-		return new MapReactorSessionRepository(new ConcurrentHashMap<>());
+	public LettuceConnectionFactory lettuceConnectionFactory() {
+		return new LettuceConnectionFactory();
 	}
 }
 // end::class[]