add: integrate redis for faster authentication

pom.xml

@@ -21,6 +21,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jpa</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-redis</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>

src/main/java/com/codemagician/onlinelibrary/domain/entity/RoleDO.java

@@ -5,6 +5,8 @@
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.io.Serializable;
+
 /**
  * @author Siuyun Yip
  * @version 1.0
@@ -14,7 +16,7 @@
 @NoArgsConstructor
 @Entity
 @Table(name = "roles")
-public class RoleDO {
+public class RoleDO implements Serializable {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)

src/main/java/com/codemagician/onlinelibrary/domain/entity/UserDO.java

@@ -6,6 +6,7 @@
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.io.Serializable;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -15,6 +16,7 @@
  * @date 2023/8/31 15:39
  */
 
+
 @Data
 @NoArgsConstructor
 @Entity
@@ -23,7 +25,7 @@
                 @UniqueConstraint(columnNames = "username"),
                 @UniqueConstraint(columnNames = "email")
         })
-public class UserDO {
+public class UserDO implements Serializable {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)

src/main/java/com/codemagician/onlinelibrary/security/jwt/AuthTokenFilter.java

@@ -43,7 +43,6 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
             String jwt = parseJwt(request);
             if (jwt != null && jwtUtils.validateJwtToken(jwt)) {
                 String username = jwtUtils.getUserNameFromJwtToken(jwt);
-                // TODO fetch user data from Redis
                 UserDetails user = userDetailsService.loadUserByUsername(username);
                 UsernamePasswordAuthenticationToken authentication =
                         new UsernamePasswordAuthenticationToken(user, null, user.getAuthorities());

src/main/java/com/codemagician/onlinelibrary/security/services/UserDetailsServiceImpl.java

@@ -3,7 +3,10 @@
 import com.codemagician.onlinelibrary.domain.entity.UserDO;
 import com.codemagician.onlinelibrary.dao.repo.UserRepository;
 import com.codemagician.onlinelibrary.common.exception.AccessException;
+import com.codemagician.onlinelibrary.util.RedisUtil;
+import jakarta.annotation.Resource;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.userdetails.User;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.stereotype.Service;
@@ -23,10 +26,17 @@ public class UserDetailsServiceImpl implements UserDetailsService {
     @Autowired
     UserRepository userRepository;
 
+    @Resource
+    private RedisUtil redisUtil;
+
     @Override
     @Transactional
     public UserDetails loadUserByUsername(String username) throws AccessException {
-        UserDO user = userRepository.findByUsernameWithRoles(username).orElseThrow(() -> new AccessException("User Not Found with username: " + username));
+        UserDO user;
+        if ((user = (UserDO)redisUtil.get(username)) == null) {
+            user = userRepository.findByUsernameWithRoles(username).orElseThrow(() -> new AccessException("User Not Found with username: " + username));
+            redisUtil.set(username, user);
+        }
 
         return UserDetailsImpl.build(user);
     }