Revize 68bd3513

re #37 create separate interface & component for User-related business logic

server/src/main/java/org/danekja/ymanager/business/UserManager.java

@@ +1 @@
+package org.danekja.ymanager.business;
+
+import org.danekja.ymanager.domain.User;
+
+/**
+ * Interface for application logic handler of User entities.
+ */
+public interface UserManager {
+
+    /**
+     * Gets user by email (username)
+     *
+     * @param email email value, used as search key
+     * @return found user Object or null
+     */
+    User getUser(String email);
+}

server/src/main/java/org/danekja/ymanager/business/impl/DefaultUserManager.java

@@ +1 @@
+package org.danekja.ymanager.business.impl;
+
+import org.danekja.ymanager.business.UserManager;
+import org.danekja.ymanager.domain.User;
+import org.danekja.ymanager.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+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;
+
+/**
+ * Default implementation of User-related application logic.
+ * <p>
+ * Also implements {@link UserDetailsService} to allow integration with Spring Security framework.
+ */
+@Service
+public class DefaultUserManager implements UserManager, UserDetailsService {
+
+    private final UserRepository userRepository;
+
+    @Autowired
+    public DefaultUserManager(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @Override
+    public User getUser(String email) {
+        return userRepository.getUser(email);
+    }
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        UserDetails details = getUser(username);
+
+        //interface contract enforces this behavior
+        if (details == null) {
+            throw new UsernameNotFoundException("Username " + username + " not found!");
+        }
+
+        return details;
+    }
+}