content: /*
   * Copyright 1999-2012 Alibaba Group.
   *  
   * 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 com.alibaba.cobar;
  
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.log4j.Logger;
  
  import com.alibaba.cobar.config.Alarms;
  import com.alibaba.cobar.config.model.UserConfig;
  import com.alibaba.cobar.net.handler.FrontendPrivileges;
  
  /**
   * @author xianmao.hexm
   */
  public class CobarPrivileges implements FrontendPrivileges {
      private static final Logger ALARM = Logger.getLogger("alarm");
  
      @Override
      public boolean schemaExists(String schema) {
          CobarConfig conf = CobarServer.getInstance().getConfig();
          return conf.getSchemas().containsKey(schema);
      }
  
      @Override
      public boolean userExists(String user, String host) {
          CobarConfig conf = CobarServer.getInstance().getConfig();
          Map<String, Set<String>> quarantineHosts = conf.getQuarantine().getHosts();
          if (quarantineHosts.containsKey(host)) {
              boolean rs = quarantineHosts.get(host).contains(user);
              if (!rs) {
                  ALARM.error(new StringBuilder().append(Alarms.QUARANTINE_ATTACK)
                      .append("[host=")
                      .append(host)
                      .append(",user=")
                      .append(user)
                      .append(']')
                      .toString());
              }
              return rs;
          } else {
              if (user != null && user.equals(conf.getSystem().getClusterHeartbeatUser())) {
                  return true;
              } else {
                  return conf.getUsers().containsKey(user);
              }
          }
      }
  
      @Override
      public String getPassword(String user) {
          CobarConfig conf = CobarServer.getInstance().getConfig();
          if (user != null && user.equals(conf.getSystem().getClusterHeartbeatUser())) {
              return conf.getSystem().getClusterHeartbeatPass();
          } else {
              UserConfig uc = conf.getUsers().get(user);
              if (uc != null) {
                  return uc.getPassword();
              } else {
                  return null;
              }
          }
      }
  
      @Override
      public Set<String> getUserSchemas(String user) {
          CobarConfig conf = CobarServer.getInstance().getConfig();
          UserConfig uc = conf.getUsers().get(user);
          if (uc != null) {
              return uc.getSchemas();
          } else {
              return null;
          }
      }
  
  }
  