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.manager.handler;
  
  import com.alibaba.cobar.config.ErrorCode;
  import com.alibaba.cobar.manager.ManagerConnection;
  import com.alibaba.cobar.manager.parser.ManagerParseClear;
  import com.alibaba.cobar.manager.response.ClearSlow;
  import com.alibaba.cobar.util.StringUtil;
  
  /**
   * @author xianmao.hexm 2012-4-16
   */
  public class ClearHandler {
  
      public static void handle(String stmt, ManagerConnection c, int offset) {
          int rs = ManagerParseClear.parse(stmt, offset);
          switch (rs & 0xff) {
          case ManagerParseClear.SLOW_DATANODE: {
              String name = stmt.substring(rs >>> 8).trim();
              if (StringUtil.isEmpty(name)) {
                  c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
              } else {
                  ClearSlow.dataNode(c, name);
              }
              break;
          }
          case ManagerParseClear.SLOW_SCHEMA: {
              String name = stmt.substring(rs >>> 8).trim();
              if (StringUtil.isEmpty(name)) {
                  c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
              } else {
                  ClearSlow.schema(c, name);
              }
              break;
          }
          default:
              c.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
          }
      }
  }
  