content: package com.ctrip.framework.apollo.portal.service;
  
  import com.google.common.collect.Maps;
  
  import com.ctrip.framework.apollo.common.config.RefreshablePropertySource;
  import com.ctrip.framework.apollo.portal.entity.po.ServerConfig;
  import com.ctrip.framework.apollo.portal.repository.ServerConfigRepository;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Component;
  
  import java.util.Map;
  import java.util.Objects;
  
  
  /**
   * @author Jason Song(song_s@ctrip.com)
   */
  @Component
  public class PortalDBPropertySource extends RefreshablePropertySource {
    private static final Logger logger = LoggerFactory.getLogger(PortalDBPropertySource.class);
  
    @Autowired
    private ServerConfigRepository serverConfigRepository;
  
  
    public PortalDBPropertySource(String name, Map<String, Object> source) {
      super(name, source);
    }
  
    public PortalDBPropertySource() {
      super("DBConfig", Maps.newConcurrentMap());
    }
  
    @Override
    protected void refresh() {
      Iterable<ServerConfig> dbConfigs = serverConfigRepository.findAll();
  
      for (ServerConfig config: dbConfigs) {
        String key = config.getKey();
        Object value = config.getValue();
  
        if (this.source.isEmpty()) {
          logger.info("Load config from DB : {} = {}", key, value);
        } else if (!Objects.equals(this.source.get(key), value)) {
          logger.info("Load config from DB : {} = {}. Old value = {}", key,
                      value, this.source.get(key));
        }
  
        this.source.put(key, value);
      }
    }
  
  
  }
  