content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.example.springboot;
  
  import java.util.Collection;
  
  /**
   * Service interface for managing users.
   */
  public interface UserService {
  
      /**
       * Find a user by the given ID
       *
       * @param id
       *            the ID of the user
       * @return the user, or <code>null</code> if user not found.
       */
      User findUser(Integer id);
  
      /**
       * Find all users
       *
       * @return a collection of all users
       */
      Collection<User> findUsers();
  
      /**
       * Update the given user
       *
       * @param user
       *            the user
       */
      void updateUser(User user);
  
  }
  