Package org.ngrinder.common.service

Source Code of org.ngrinder.common.service.ModelAspect

/*
* Licensed 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.ngrinder.common.service;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.ngrinder.infra.spring.SpringContext;
import org.ngrinder.model.BaseModel;
import org.ngrinder.model.User;
import org.ngrinder.user.repository.UserRepository;
import org.ngrinder.user.service.UserContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Date;

/**
* Aspect to inject the created/modified user and date to the model.
*
* @author Liu Zhifei
* @author JunHo Yoon
* @since 3.0
*/
@Aspect
@Service
public class ModelAspect {

  public static final String EXECUTION_SAVE = "execution(* org.ngrinder.**.*Service.save*(..))";

  @Autowired
  private UserContext userContext;

  @Autowired
  private SpringContext springContext;

  @Autowired
  private UserRepository userRepository;


  /**
   * Inject the created/modified user and date to the model. It's only applied
   * in the servlet context.
   *
   * @param joinPoint joint point
   */
  @Before(EXECUTION_SAVE)
  public void beforeSave(JoinPoint joinPoint) {
    for (Object object : joinPoint.getArgs()) {
      // If the object is base model and it's on the servlet
      // context, It's not executed by task scheduling.
      SpringContext springContext = getSpringContext();
      if (object instanceof BaseModel
          && (springContext.isServletRequestContext() || springContext.isUnitTestContext())) {
        BaseModel<?> model = (BaseModel<?>) object;
        Date lastModifiedDate = new Date();
        model.setLastModifiedDate(lastModifiedDate);
        User currentUser = userContext.getCurrentUser();
        model.setLastModifiedUser(userRepository.findOne(currentUser.getId()));

        if (!model.exist() || model.getCreatedUser() == null) {
          model.setCreatedDate(lastModifiedDate);
          User factualUser = currentUser.getFactualUser();
          model.setCreatedUser(userRepository.findOne(factualUser.getId()));
        }
      }
    }
  }

  public SpringContext getSpringContext() {
    return springContext;
  }

  public void setSpringContext(SpringContext springContext) {
    this.springContext = springContext;
  }

}
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