content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * based on code by MyCATCopyrightHolder Copyright (c) 2013, OpenCloudDB/MyCAT.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  package com.actiontech.dble.services.manager.response;
  
  import com.actiontech.dble.DbleServer;
  import com.actiontech.dble.backend.mysql.PacketUtil;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.net.IOProcessor;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.statistic.CommandCount;
  import com.actiontech.dble.util.LongUtil;
  
  import java.nio.ByteBuffer;
  
  /**
   * Show Command times
   *
   * @author mycat
   * @author mycat
   */
  public final class ShowCommand {
      private ShowCommand() {
      }
  
      private static final int FIELD_COUNT = 12;
      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("PROCESSOR", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("INIT_DB", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("QUERY", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STMT_PREPARE", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STMT_EXECUTE", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STMT_CLOSE", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("PING", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("KILL", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("QUIT", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STMT_SEND_LONG_DATA", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STMT_RESET", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("OTHER", 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();
          for (IOProcessor p : DbleServer.getInstance().getFrontProcessors()) {
              RowDataPacket row = getRow(p);
              row.setPacketId(++packetId);
              buffer = row.write(buffer, service, true);
          }
  
          // write last eof
          EOFRowPacket lastEof = new EOFRowPacket();
          lastEof.setPacketId(++packetId);
  
  
          lastEof.write(buffer, service);
      }
  
      private static RowDataPacket getRow(IOProcessor processor) {
          CommandCount cc = processor.getCommands();
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(processor.getName().getBytes());
          row.add(LongUtil.toBytes(cc.initDBCount()));
          row.add(LongUtil.toBytes(cc.queryCount()));
          row.add(LongUtil.toBytes(cc.stmtPrepareCount()));
          row.add(LongUtil.toBytes(cc.stmtExecuteCount()));
          row.add(LongUtil.toBytes(cc.stmtCloseCount()));
          row.add(LongUtil.toBytes(cc.pingCount()));
          row.add(LongUtil.toBytes(cc.killCount()));
          row.add(LongUtil.toBytes(cc.quitCount()));
          row.add(LongUtil.toBytes(cc.stmtSendLongDataCount()));
          row.add(LongUtil.toBytes(cc.stmtResetCount()));
          row.add(LongUtil.toBytes(cc.otherCount()));
          return row;
      }
  
  }
  