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.IOProcessor;
  import com.actiontech.dble.net.connection.BackendConnection;
  import com.actiontech.dble.net.connection.PooledConnection;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.util.IntegerUtil;
  import com.actiontech.dble.util.LongUtil;
  import com.actiontech.dble.util.StringUtil;
  import com.actiontech.dble.util.TimeUtil;
  
  import java.nio.ByteBuffer;
  
  /**
   * Show Backend Old connection for reload @@config_all
   *
   * @author zhuam
   */
  public final class ShowBackendOld {
      private ShowBackendOld() {
      }
  
      private static final int FIELD_COUNT = 10;
      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("BACKEND_ID", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("MYSQLID", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("HOST", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("PORT", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("LOACL_TCP_PORT", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("NET_IN", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("NET_OUT", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("ACTIVE_TIME(S)", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("LASTTIME", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("BORROWED", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i].setPacketId(++packetId);
          EOF.setPacketId(++packetId);
      }
  
      public static void execute(ManagerService service) {
          ByteBuffer buffer = service.allocate();
          buffer = HEADER.write(buffer, service, true);
          for (FieldPacket field : FIELDS) {
              buffer = field.write(buffer, service, true);
          }
          buffer = EOF.write(buffer, service, true);
          byte packetId = EOF.getPacketId();
  
          for (PooledConnection bc : IOProcessor.BACKENDS_OLD) {
              if (bc != null) {
                  RowDataPacket row = getRow((BackendConnection) bc, service.getCharset().getResults());
                  row.setPacketId(++packetId);
                  buffer = row.write(buffer, service, true);
              }
          }
  
          EOFRowPacket lastEof = new EOFRowPacket();
          lastEof.setPacketId(++packetId);
  
          lastEof.write(buffer, service);
      }
  
      private static RowDataPacket getRow(BackendConnection c, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(LongUtil.toBytes(c.getId()));
          long threadId = 0;
          threadId = c.getThreadId();
          row.add(LongUtil.toBytes(threadId));
          row.add(StringUtil.encode(c.getHost(), charset));
          row.add(IntegerUtil.toBytes(c.getPort()));
          row.add(IntegerUtil.toBytes(c.getLocalPort()));
          row.add(LongUtil.toBytes(c.getNetInBytes()));
          row.add(LongUtil.toBytes(c.getNetOutBytes()));
          row.add(LongUtil.toBytes((TimeUtil.currentTimeMillis() - c.getStartupTime()) / 1000L));
          row.add(LongUtil.toBytes(c.getLastTime()));
          boolean isBorrowed = c.getState() == PooledConnection.STATE_IN_USE;
          row.add(isBorrowed ? "true".getBytes() : "false".getBytes());
          return row;
      }
  
  }
  