content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  package com.actiontech.dble.services.manager.response;
  
  import com.actiontech.dble.backend.mysql.PacketUtil;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.statistic.sql.analyzer.QueryConditionAnalyzer;
  import com.actiontech.dble.util.LongUtil;
  import com.actiontech.dble.util.StringUtil;
  
  import java.nio.ByteBuffer;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * ShowSQLCondition
   *
   * @author zhuam
   */
  public final class ShowSQLCondition {
      private ShowSQLCondition() {
      }
  
      private static final int FIELD_COUNT = 4;
      private static final ResultSetHeaderPacket HEADER = PacketUtil.getHeader(FIELD_COUNT);
      private static final FieldPacket[] FIELDS = new FieldPacket[FIELD_COUNT];
      private static final EOFPacket EOF = new EOFPacket();
  
      static {
          int i = 0;
          byte packetId = 0;
          HEADER.setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("ID", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("KEY", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("VALUE", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("COUNT", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i].setPacketId(++packetId);
  
          EOF.setPacketId(++packetId);
      }
  
      public static void execute(ManagerService service) {
          ByteBuffer buffer = service.allocate();
  
          // write header
          buffer = HEADER.write(buffer, service, true);
  
          // write fields
          for (FieldPacket field : FIELDS) {
              buffer = field.write(buffer, service, true);
          }
  
          // write eof
          buffer = EOF.write(buffer, service, true);
  
          // write rows
          byte packetId = EOF.getPacketId();
  
          String key = QueryConditionAnalyzer.getInstance().getKey();
          List<Map.Entry<Object, AtomicLong>> list = QueryConditionAnalyzer.getInstance().getValues();
  
          int size = list.size();
          long total = 0L;
  
          for (int i = 0; i < size; i++) {
              Map.Entry<Object, AtomicLong> entry = list.get(i);
              Object value = entry.getKey();
              long count = entry.getValue().get();
              total += count;
  
              RowDataPacket row = getRow(i, key, value.toString(), count, service.getCharset().getResults());
              row.setPacketId(++packetId);
              buffer = row.write(buffer, service, true);
          }
  
          RowDataPacket vkRow = getRow(size + 1, key + ".valuekey", "size", size, service.getCharset().getResults());
          vkRow.setPacketId(++packetId);
          buffer = vkRow.write(buffer, service, true);
  
          RowDataPacket vcRow = getRow(size + 2, key + ".valuecount", "total", total, service.getCharset().getResults());
          vcRow.setPacketId(++packetId);
          buffer = vcRow.write(buffer, service, true);
  
          // write last eof
          EOFRowPacket lastEof = new EOFRowPacket();
          lastEof.setPacketId(++packetId);
  
  
          lastEof.write(buffer, service);
      }
  
      private static RowDataPacket getRow(int i, String key, String value, long count, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(LongUtil.toBytes(i));
          row.add(StringUtil.encode(key, charset));
          row.add(StringUtil.encode(value, charset));
          row.add(LongUtil.toBytes(count));
          return row;
      }
  
  
  }
  