JAVA-18764: Update article "CAS SSO with Spring Security"

security-modules/cas/cas-secured-app/pom.xml

@@ -36,6 +36,15 @@
             <artifactId>spring-boot-devtools</artifactId>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

security-modules/cas/cas-secured-app/src/main/java/com/baeldung/cassecuredapp/CasSecuredApplication.java

@@ -6,6 +6,7 @@ import org.jasig.cas.client.validation.Cas30ServiceTicketValidator;
 import org.jasig.cas.client.validation.TicketValidator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
@@ -34,6 +35,7 @@ public class CasSecuredApplication {
         SpringApplication.run(CasSecuredApplication.class, args);
     }
 
+
     @Bean
     public CasAuthenticationFilter casAuthenticationFilter(
       AuthenticationManager authenticationManager,
@@ -58,6 +60,10 @@ public class CasSecuredApplication {
         return new Cas30ServiceTicketValidator("https://localhost:8443/cas");
     }
 
+    @Bean
+    public MyUserDetailsService getUser(){
+        return new MyUserDetailsService();
+    }
     @Bean
     public CasAuthenticationProvider casAuthenticationProvider(
       TicketValidator ticketValidator,
@@ -65,9 +71,10 @@ public class CasSecuredApplication {
         CasAuthenticationProvider provider = new CasAuthenticationProvider();
         provider.setServiceProperties(serviceProperties);
         provider.setTicketValidator(ticketValidator);
-        provider.setUserDetailsService(
+       /* provider.setUserDetailsService(
           s -> new User("casuser", "Mellon", true, true, true, true,
-          AuthorityUtils.createAuthorityList("ROLE_ADMIN")));
+          AuthorityUtils.createAuthorityList("ROLE_ADMIN")));*/
+        provider.setUserDetailsService(getUser());
         provider.setKey("CAS_PROVIDER_LOCALHOST_8900");
         return provider;
     }

security-modules/cas/cas-secured-app/src/main/java/com/baeldung/cassecuredapp/MyUserDetailsService.java

@@ -0,0 +1,34 @@
+package com.baeldung.cassecuredapp;
+
+import java.util.Collections;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+
+public class MyUserDetailsService implements UserDetailsService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        // Get the user from the database.
+        Users users = getUserFromDatabase(username);
+
+        // Create a UserDetails object.
+        UserDetails userDetails = new User(
+            users.getEmail(),
+            users.getPassword(),
+           Collections.singletonList(new SimpleGrantedAuthority("ROLE_ADMIN")));
+
+        return userDetails;
+    }
+
+    private Users getUserFromDatabase(String username) {
+       return userRepository.findByEmail(username);
+    }
+}

security-modules/cas/cas-secured-app/src/main/java/com/baeldung/cassecuredapp/UserRepository.java

@@ -0,0 +1,15 @@
+package com.baeldung.cassecuredapp;
+
+import java.util.Optional;
+
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends CrudRepository<Users, Long> {
+
+    Users findByEmail(@Param("email") String email);
+
+}

security-modules/cas/cas-secured-app/src/main/java/com/baeldung/cassecuredapp/Users.java

@@ -0,0 +1,41 @@
+package com.baeldung.cassecuredapp;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Users {
+    @Id
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String email;
+
+    private String password;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

security-modules/cas/cas-secured-app/src/main/resources/application.properties

@@ -1,2 +1,8 @@
 server.port=8900
-spring.freemarker.suffix=.ftl
+spring.freemarker.suffix=.ftl
+
+spring.jpa.generate-ddl=false
+spring.datasource.url= jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
+spring.datasource.username=root
+spring.datasource.password=root1234
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver