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.datasource.PhysicalDbGroup;
  import com.actiontech.dble.backend.datasource.PhysicalDbInstance;
  import com.actiontech.dble.backend.heartbeat.MySQLHeartbeat;
  import com.actiontech.dble.backend.mysql.PacketUtil;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.config.ServerConfig;
  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.TimeUtil;
  
  import java.nio.ByteBuffer;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  /**
   * @author mycat
   */
  public final class ShowHeartbeat {
      private ShowHeartbeat() {
      }
  
      private static final int FIELD_COUNT = 11;
      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("NAME", Fields.FIELD_TYPE_VAR_STRING);
          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("RS_CODE", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("RETRY", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STATUS", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("TIMEOUT", Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("EXECUTE_TIME", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("LAST_ACTIVE_TIME", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("STOP", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("RS_MESSAGE ", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i].setPacketId(++packetId);
  
          EOF.setPacketId(++packetId);
      }
  
      public static void response(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 (RowDataPacket row : getRows()) {
              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 List<RowDataPacket> getRows() {
          List<RowDataPacket> list = new LinkedList<>();
          ServerConfig conf = DbleServer.getInstance().getConfig();
          // host nodes
          Map<String, PhysicalDbGroup> dbGroups = conf.getDbGroups();
          for (PhysicalDbGroup pool : dbGroups.values()) {
              for (PhysicalDbInstance ds : pool.getDbInstances(true)) {
                  MySQLHeartbeat hb = ds.getHeartbeat();
                  RowDataPacket row = new RowDataPacket(FIELD_COUNT);
                  row.add(ds.getName().getBytes());
                  if (hb != null) {
                      row.add(ds.getConfig().getIp().getBytes());
                      row.add(IntegerUtil.toBytes(ds.getConfig().getPort()));
                      String code = hb.getStatus().toString();
                      row.add(code.getBytes());
                      row.add(IntegerUtil.toBytes(hb.getErrorCount()));
                      row.add(hb.isChecking() ? "checking".getBytes() : "idle".getBytes());
                      row.add(LongUtil.toBytes(hb.getHeartbeatTimeout()));
                      row.add(hb.getRecorder().get().getBytes());
                      String lat = hb.getLastActiveTime();
                      row.add(lat == null ? null : lat.getBytes());
                      row.add(hb.isStop() || TimeUtil.currentTimeMillis() < hb.getHeartbeatRecoveryTime() ? "true".getBytes() : "false".getBytes());
                      row.add(hb.getMessage() == null ? null : hb.getMessage().getBytes());
                  } else {
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                      row.add(null);
                  }
                  list.add(row);
              }
          }
          return list;
      }
  }
  