content: /*
   * Copyright 1999-2022 Alibaba Group Holding Ltd.
   *
   * 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.nacos.plugin.datasource.impl.derby;
  
  import com.alibaba.nacos.common.utils.CollectionUtils;
  import com.alibaba.nacos.common.utils.NamespaceUtil;
  import com.alibaba.nacos.plugin.datasource.constants.DataSourceConstant;
  import com.alibaba.nacos.plugin.datasource.constants.FieldConstant;
  import com.alibaba.nacos.plugin.datasource.mapper.GroupCapacityMapper;
  import com.alibaba.nacos.plugin.datasource.model.MapperContext;
  import com.alibaba.nacos.plugin.datasource.model.MapperResult;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  /**
   * The derby implementation of {@link GroupCapacityMapper}.
   *
   * @author lixiaoshuang
   */
  public class GroupCapacityMapperByDerby extends AbstractMapperByDerby implements GroupCapacityMapper {
  
      @Override
      public String getDataSource() {
          return DataSourceConstant.DERBY;
      }
  
      @Override
      public MapperResult selectGroupInfoBySize(MapperContext context) {
          String sql = "SELECT id, group_id FROM group_capacity WHERE id > ? OFFSET 0 ROWS FETCH NEXT ? ROWS ONLY";
          return new MapperResult(sql,
                  CollectionUtils.list(context.getWhereParameter(FieldConstant.ID), context.getPageSize()));
      }
      
      @Override
      public MapperResult select(MapperContext context) {
          String sql = "SELECT id, quota, usage, max_size, max_aggr_count, max_aggr_size, group_id FROM group_capacity "
                  + "WHERE group_id = ?";
          return new MapperResult(sql, Collections.singletonList(context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
      
      @Override
      public MapperResult incrementUsageByWhere(MapperContext context) {
          return new MapperResult("UPDATE group_capacity SET usage = usage + 1, gmt_modified = ? WHERE group_id = ?",
                  CollectionUtils.list(context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
      
      @Override
      public MapperResult incrementUsageByWhereQuotaNotEqualZero(MapperContext context) {
          return new MapperResult(
                  "UPDATE group_capacity SET usage = usage + 1, gmt_modified = ? WHERE group_id = ? AND usage < quota AND quota != 0",
                  CollectionUtils.list(context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
      
      @Override
      public MapperResult insertIntoSelect(MapperContext context) {
          List<Object> paramList = new ArrayList<>();
          paramList.add(context.getUpdateParameter(FieldConstant.GROUP_ID));
          paramList.add(context.getUpdateParameter(FieldConstant.QUOTA));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_SIZE));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_AGGR_COUNT));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_AGGR_SIZE));
          paramList.add(context.getUpdateParameter(FieldConstant.GMT_CREATE));
          paramList.add(context.getUpdateParameter(FieldConstant.GMT_MODIFIED));
          
          String sql =
                  "INSERT INTO group_capacity (group_id, quota, usage, max_size, max_aggr_count, max_aggr_size,gmt_create,"
                          + " gmt_modified) SELECT ?, ?, count(*), ?, ?, ?, ?, ? FROM config_info";
          return new MapperResult(sql, paramList);
      }
      
      @Override
      public MapperResult insertIntoSelectByWhere(MapperContext context) {
          final String sql =
                  "INSERT INTO group_capacity (group_id, quota, usage, max_size, max_aggr_count, max_aggr_size, gmt_create,"
                          + " gmt_modified) SELECT ?, ?, count(*), ?, ?, ?, ?, ? FROM config_info WHERE group_id=? AND tenant_id = '"
                          + NamespaceUtil.getNamespaceDefaultId() + "'";
          List<Object> paramList = new ArrayList<>();
          paramList.add(context.getUpdateParameter(FieldConstant.GROUP_ID));
          paramList.add(context.getUpdateParameter(FieldConstant.QUOTA));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_SIZE));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_AGGR_COUNT));
          paramList.add(context.getUpdateParameter(FieldConstant.MAX_AGGR_SIZE));
          paramList.add(context.getUpdateParameter(FieldConstant.GMT_CREATE));
          paramList.add(context.getUpdateParameter(FieldConstant.GMT_MODIFIED));
          
          paramList.add(context.getWhereParameter(FieldConstant.GROUP_ID));
          
          return new MapperResult(sql, paramList);
      }
      
      @Override
      public MapperResult incrementUsageByWhereQuotaEqualZero(MapperContext context) {
          return new MapperResult(
                  "UPDATE group_capacity SET usage = usage + 1, gmt_modified = ? WHERE group_id = ? AND usage < ? AND quota = 0",
                  CollectionUtils.list(context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID),
                          context.getWhereParameter(FieldConstant.USAGE)));
      }
      
      @Override
      public MapperResult decrementUsageByWhere(MapperContext context) {
          return new MapperResult(
                  "UPDATE group_capacity SET usage = usage - 1, gmt_modified = ? WHERE group_id = ? AND usage > 0",
                  CollectionUtils.list(context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
      
      @Override
      public MapperResult updateUsage(MapperContext context) {
          return new MapperResult(
                  "UPDATE group_capacity SET usage = (SELECT count(*) FROM config_info), gmt_modified = ? WHERE group_id = ?",
                  CollectionUtils.list(context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
      
      @Override
      public MapperResult updateUsageByWhere(MapperContext context) {
          return new MapperResult(
                  "UPDATE group_capacity SET usage = (SELECT count(*) FROM config_info WHERE group_id=? AND tenant_id = '"
                          + NamespaceUtil.getNamespaceDefaultId() + "')," + " gmt_modified = ? WHERE group_id= ?",
                  CollectionUtils.list(context.getWhereParameter(FieldConstant.GROUP_ID),
                          context.getUpdateParameter(FieldConstant.GMT_MODIFIED),
                          context.getWhereParameter(FieldConstant.GROUP_ID)));
      }
  }
  