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.DbleServer;
  import com.actiontech.dble.backend.mysql.PacketUtil;
  import com.actiontech.dble.config.ErrorCode;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.config.model.user.AnalysisUserConfig;
  import com.actiontech.dble.net.IOProcessor;
  import com.actiontech.dble.net.connection.FrontendConnection;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.net.service.AbstractService;
  import com.actiontech.dble.server.status.SlowQueryLog;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.services.mysqlsharding.ShardingService;
  import com.actiontech.dble.services.rwsplit.RWSplitService;
  import com.actiontech.dble.util.StringUtil;
  
  import java.nio.ByteBuffer;
  import java.util.List;
  
  public final class ShowConnectionSQLStatus {
      private ShowConnectionSQLStatus() {
      }
  
      private static final int FIELD_COUNT = 6;
      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("OPERATION", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("START(ms)", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("END(ms)", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("DURATION(ms)", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("SHARDING_NODE", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("SQL/REF", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i].setPacketId(++packetId);
          EOF.setPacketId(++packetId);
      }
  
      public static void execute(ManagerService service, String id) {
          if (!SlowQueryLog.getInstance().isEnableSlowLog()) {
              service.writeErrMessage(ErrorCode.ER_YES, "please enable @@slow_query_log first");
              return;
          }
          long realId = 0;
          try {
              realId = Long.parseLong(id);
          } catch (NumberFormatException e) {
              service.writeErrMessage(ErrorCode.ER_YES, "front_id must be a number");
              return;
          }
          IOProcessor[] processors = DbleServer.getInstance().getFrontProcessors();
          FrontendConnection target = null;
          for (IOProcessor p : processors) {
              for (FrontendConnection fc : p.getFrontends().values()) {
                  if (fc != null && fc.getId() == realId) {
                      target = fc;
                      break;
                  }
              }
          }
          if (target == null) {
              service.writeErrMessage(ErrorCode.ER_YES, "The front_id " + id + " doesn't exist");
              return;
          }
          AbstractService frontService = target.getService();
          if (target.isManager()) {
              service.writeErrMessage(ErrorCode.ER_YES, "The front_id " + id + " is a manager connection");
              return;
          }
          if (frontService instanceof RWSplitService) {
              //temporary process
              if (((RWSplitService) frontService).getUserConfig() instanceof AnalysisUserConfig) {
                  service.writeErrMessage(ErrorCode.ER_YES, "The front_id " + id + " is a analysis connection");
                  return;
              }
              service.writeErrMessage(ErrorCode.ER_YES, "The front_id " + id + " is a RWSplit connection");
              return;
          }
          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();
  
          List<String[]> results = ((ShardingService) frontService).getSession2().genRunningSQLStage();
          if (results != null) {
              for (String[] result : results) {
                  RowDataPacket row = new RowDataPacket(FIELD_COUNT);
                  for (int i = 0; i < FIELD_COUNT; i++) {
                      row.add(StringUtil.encode(result[i], 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);
  
      }
  }
  