Fix spring-session-sample-boot-hazelcast

spring-session-samples/spring-session-sample-boot-hazelcast/src/main/java/sample/config/UserControllerAdvise.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2014-2022 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 sample.config;
+
+import java.security.Principal;
+
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ModelAttribute;
+
+/**
+ * {@link ControllerAdvice} to expose user related attributes.
+ *
+ * @author Rob Winch
+ */
+@ControllerAdvice
+public class UserControllerAdvise {
+
+	@ModelAttribute("currentUserName")
+	String currentUser(Principal principal) {
+		return (principal != null) ? principal.getName() : null;
+	}
+
+}