src/main/java/com/forum/service/UserDetailsServiceImpl.java
package com.forum.service;
import com.forum.model.User;
import com.forum.repository.UserRepository;
import lombok.AllArgsConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
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 org.springframework.transaction.annotation.Transactional;
import java.util.Collection;
import java.util.Optional;
import static java.util.Collections.singletonList;
@Service
@AllArgsConstructor
public class UserDetailsServiceImpl implements UserDetailsService {
private final UserRepository userRepository;
@Override
@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username) {
Optional<User> userOptional = userRepository.findByUsername(username);
User user = userOptional
.orElseThrow(() -> new UsernameNotFoundException("No user " +
"Found with username : " + username));
return new org.springframework.security
.core.userdetails.User(user.getUsername(), user.getPassword(),
user.isEnabled(), true, true,
true, getAuthorities("USER"));
}
private Collection<? extends GrantedAuthority> getAuthorities(String role) {
return singletonList(new SimpleGrantedAuthority(role));
}
}