Bael 4020 (#11188)

* [BAEL-4849] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Remove extra comments

* [BAEL-4020] Article code

libraries-security/src/main/java/com/baeldung/scribejava/ScribejavaApplication.java

@@ -2,9 +2,11 @@ package com.baeldung.scribejava;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.ServletComponentScan;
 
 
 @SpringBootApplication
+@ServletComponentScan
 public class ScribejavaApplication {
 
     public static void main(String[] args) {

libraries-security/src/main/java/com/baeldung/scribejava/controller/RBACController.java

@@ -0,0 +1,27 @@
+package com.baeldung.scribejava.controller;
+
+import java.io.IOException;
+
+import javax.annotation.security.DeclareRoles;
+import javax.annotation.security.RolesAllowed;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.HttpConstraint;
+import javax.servlet.annotation.ServletSecurity;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@WebServlet(name="rbac", urlPatterns = {"/protected"})
+@DeclareRoles("USER")
+@ServletSecurity(
+    @HttpConstraint(rolesAllowed = "USER")
+)
+public class RBACController  extends HttpServlet {
+
+    private static final long serialVersionUID = 1L;
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        resp.getWriter().println("Hello, USER");
+    }
+}