Added sample application 09-spring-security-db-authentication

1 files changed, 25 insertions, 0 deletions

diff --git a/spring-boot/09-spring-security-db-authentication/src/main/java/com/example/spring/user/service/CustomUserDetailsService.java b/spring-boot/09-spring-security-db-authentication/src/main/java/com/example/spring/user/service/CustomUserDetailsService.java
new file mode 100644
index 0000000..c61649e
--- /dev/null
+++ b/spring-boot/09-spring-security-db-authentication/src/main/java/com/example/spring/user/service/CustomUserDetailsService.java
@@ -0,0 +1,25 @@
+package com.example.spring.user.service;
+
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+
+import com.example.spring.user.repository.UserRepository;
+
+@Service
+public class CustomUserDetailsService implements UserDetailsService {
+
+    private final UserRepository userRepository;
+
+    public CustomUserDetailsService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        return userRepository.findByUsername(username)
+                .orElseThrow(() -> new UsernameNotFoundException("User not found"));
+    }
+
+}
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