Add CookieSerializer Strategy

This allows for custom seralization of the Cookie.

Fixes gh-299

samples/custom-cookie/src/main/java/sample/Config.java

@@ -0,0 +1,43 @@
+/*
+ * 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 sample;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
+import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
+import org.springframework.session.web.http.CookieSerializer;
+import org.springframework.session.web.http.DefaultCookieSerializer;
+
+
+@EnableRedisHttpSession
+public class Config {
+
+	@Bean
+	public JedisConnectionFactory connectionFactory() {
+		return new JedisConnectionFactory();
+	}
+
+	// tag::cookie-serializer[]
+	@Bean
+	public CookieSerializer cookieSerializer() {
+		DefaultCookieSerializer serializer = new DefaultCookieSerializer();
+		serializer.setCookieName("JSESSIONID"); // <1>
+		serializer.setCookiePath("/"); // <2>
+		serializer.setDomainNamePattern("^.+?\\.(\\w+\\.[a-z]+)$"); // <3>
+		return serializer;
+	}
+	// end::cookie-serializer[]
+}