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.ErrorCode;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.config.ServerConfig;
  import com.actiontech.dble.config.model.SystemConfig;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.statistic.HeartbeatRecorder;
  import com.actiontech.dble.util.IntegerUtil;
  import com.actiontech.dble.util.LongUtil;
  import com.actiontech.dble.util.StringUtil;
  
  import java.nio.ByteBuffer;
  import java.text.SimpleDateFormat;
  import java.util.*;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  
  /**
   * @author songwie
   */
  public final class ShowHeartbeatDetail {
      public static final Pattern HEARTBEAT_DETAIL_STMT = Pattern.compile("show\\s+@@heartbeat.detail\\s+where\\s+(name)\\s*=\\s*([^\\s]+)\\s*(;)?", Pattern.CASE_INSENSITIVE);
  
      private ShowHeartbeatDetail() {
      }
  
      private static final int FIELD_COUNT = 5;
      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("TIME", Fields.FIELD_TYPE_DATETIME);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("EXECUTE_TIME", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          EOF.setPacketId(++packetId);
      }
  
      public static void response(ManagerService service, String stmt) {
          Matcher matcher = HEARTBEAT_DETAIL_STMT.matcher(stmt);
          String name;
          if (!matcher.matches() || (name = matcher.group(2)) == null) {
              service.writeErrMessage(ErrorCode.ER_YES, "Unsupported statement");
              return;
          }
          name = StringUtil.removeAllApostrophe(name);
          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();
  
          if (!SystemConfig.getInstance().isCloseHeartBeatRecord()) {
              for (RowDataPacket row : getRows(name, service.getCharset().getResults())) {
                  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(String name, String charset) {
          List<RowDataPacket> list = new LinkedList<>();
          ServerConfig conf = DbleServer.getInstance().getConfig();
          String ip = "";
          int port = 0;
          MySQLHeartbeat hb = null;
  
          Map<String, PhysicalDbGroup> dbGroups = conf.getDbGroups();
          for (PhysicalDbGroup pool : dbGroups.values()) {
              for (PhysicalDbInstance ds : pool.getDbInstances(false)) {
                  if (name.equals(ds.getName())) {
                      hb = ds.getHeartbeat();
                      ip = ds.getConfig().getIp();
                      port = ds.getConfig().getPort();
                      break;
                  }
              }
          }
          if (hb != null) {
              SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
              Queue<HeartbeatRecorder.Record> heartbeatRecorders = hb.getRecorder().getRecordsAll();
              for (HeartbeatRecorder.Record record : heartbeatRecorders) {
                  RowDataPacket row = new RowDataPacket(FIELD_COUNT);
                  row.add(StringUtil.encode(name, charset));
                  row.add(StringUtil.encode(ip, charset));
                  row.add(IntegerUtil.toBytes(port));
                  long time = record.getTime();
                  String timeStr = sdf.format(new Date(time));
                  row.add(StringUtil.encode(timeStr, charset));
                  row.add(LongUtil.toBytes(record.getValue()));
  
                  list.add(row);
              }
          } else {
              RowDataPacket row = new RowDataPacket(FIELD_COUNT);
              row.add(null);
              row.add(null);
              row.add(null);
              row.add(null);
              row.add(null);
              list.add(row);
          }
  
          return list;
      }
  
  }
  