Simplify project structure

- harmonize module and directory names
- optimize Gradle settings
- remove unused Grails sample

Resolves: #1447

spring-session-docs/src/test/java/docs/http/HazelcastHttpSessionConfig.java

@@ -0,0 +1,53 @@
+/*
+ * 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
+ *
+ *      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 docs.http;
+
+import com.hazelcast.config.Config;
+import com.hazelcast.config.MapAttributeConfig;
+import com.hazelcast.config.MapIndexConfig;
+import com.hazelcast.core.Hazelcast;
+import com.hazelcast.core.HazelcastInstance;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.session.hazelcast.HazelcastSessionRepository;
+import org.springframework.session.hazelcast.PrincipalNameExtractor;
+import org.springframework.session.hazelcast.config.annotation.web.http.EnableHazelcastHttpSession;
+
+//tag::config[]
+@EnableHazelcastHttpSession // <1>
+@Configuration
+public class HazelcastHttpSessionConfig {
+
+	@Bean
+	public HazelcastInstance hazelcastInstance() {
+		MapAttributeConfig attributeConfig = new MapAttributeConfig()
+				.setName(HazelcastSessionRepository.PRINCIPAL_NAME_ATTRIBUTE)
+				.setExtractor(PrincipalNameExtractor.class.getName());
+
+		Config config = new Config();
+
+		config.getMapConfig(HazelcastSessionRepository.DEFAULT_SESSION_MAP_NAME) // <2>
+				.addMapAttributeConfig(attributeConfig)
+				.addMapIndexConfig(new MapIndexConfig(
+						HazelcastSessionRepository.PRINCIPAL_NAME_ATTRIBUTE, false));
+
+		return Hazelcast.newHazelcastInstance(config); // <3>
+	}
+
+}
+// end::config[]