getting username and user role in HelloController

Author: U-DOUBLESLASH\mfischer

src/main/java/de/doubleslash/example/springboot/HelloController.java

@@ -1,14 +1,27 @@
 package de.doubleslash.example.springboot;
 
+import java.text.MessageFormat;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class HelloController {
 
-   @RequestMapping("/")
-   public String index() {
-      return "Greetings from Spring Boot!";
-   }
+	@RequestMapping("/")
+	public String index() {
+
+		Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
+		UserDetails currentUser = (UserDetails) authentication.getPrincipal();
+		return MessageFormat.format("Hello {0} {1}!",
+				currentUser.getAuthorities().stream() //
+						.map(grantedAuth -> grantedAuth.getAuthority())//
+						.anyMatch(role -> role.equals("ADMIN")) ? "administrator" : "user",
+				currentUser.getUsername());
+	}
 
 }

src/main/java/de/doubleslash/example/springboot/Role.java

@@ -8,22 +8,47 @@
 @Table(name = "Role")
 public class Role {
 
-   public Role() {}
-
-   public Role(final String role) {
-      this.role = role;
-   }
-
-   @Id
-   private String role;
-
-   public String getRole() {
-      return role;
-   }
-
-   public void setRole(final String role) {
-      this.role = role;
-
-   }
+	public Role() {
+	}
+
+	public Role(final String role) {
+		this.role = role;
+	}
+
+	@Id
+	private String role;
+
+	public String getRole() {
+		return role;
+	}
+
+	public void setRole(final String role) {
+		this.role = role;
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + ((role == null) ? 0 : role.hashCode());
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		Role other = (Role) obj;
+		if (role == null) {
+			if (other.role != null)
+				return false;
+		} else if (!role.equals(other.role))
+			return false;
+		return true;
+	}
 
 }

src/main/java/de/doubleslash/example/springboot/User.java

@@ -21,6 +21,9 @@ public class User {
    @NotNull
    private boolean enabled = true;
 
+   // Role could be an enum instead of entity. 
+   // We just use an entity here in order to show ManyToOne in a simple example.
+   // There is an example using Role enum in the Spring documentation.
    @ManyToOne(cascade = CascadeType.ALL)
    private Role role;
 

src/main/java/de/doubleslash/example/springboot/UserInit.java

@@ -13,11 +13,21 @@ public class UserInit implements CommandLineRunner {
 
    @Override
    public void run(final String... args) throws Exception {
-      final User user1 = new User("user1",
+      
+	   // create a user
+	   final User user1 = new User("user1",
             // Passwort hashen
             new BCryptPasswordEncoder().encode("bootifulPassword"), //
             true, new Role("USER"));
       userRepo.save(user1);
+      
+      // create an admin
+      final User admin1 = new User("admin1",
+              // Passwort hashen
+              new BCryptPasswordEncoder().encode("bootifulAdminPassword"), //
+              true, new Role("ADMIN"));
+      userRepo.save(admin1);
    }
+   
 
 }