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.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.util.*;
  
  import java.nio.ByteBuffer;
  import java.util.LinkedList;
  
  /**
   * ShowThreadPool status
   *
   * @author mycat
   * @author mycat
   */
  public final class ShowThreadPool {
      private ShowThreadPool() {
      }
  
      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("NAME", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("POOL_SIZE", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("ACTIVE_COUNT", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("TASK_QUEUE_SIZE",
                  Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("COMPLETED_TASK",
                  Fields.FIELD_TYPE_LONGLONG);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("TOTAL_TASK",
                  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();
  
          DbleServer server = DbleServer.getInstance();
          LinkedList<RowDataPacket> rows = new LinkedList<>();
          rows.add(getRow((NameableExecutor) server.getTimerExecutor(), service.getCharset().getResults()));
          rows.add(getRow(server.getTimerSchedulerExecutor(), service.getCharset().getResults()));
          rows.add(getRow((NameableExecutor) server.getFrontExecutor(), service.getCharset().getResults()));
          rows.add(getRow((NameableExecutor) server.getManagerFrontExecutor(), service.getCharset().getResults()));
          rows.add(getRow((NameableExecutor) server.getBackendExecutor(), service.getCharset().getResults()));
          rows.add(getRow((NameableExecutor) server.getComplexQueryExecutor(), service.getCharset().getResults()));
          rows.add(getRow((NameableExecutor) server.getWriteToBackendExecutor(), service.getCharset().getResults()));
  
          for (RowDataPacket row : rows) {
              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(NameableExecutor exec, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(StringUtil.encode(exec.getName(), charset));
          row.add(IntegerUtil.toBytes(exec.getPoolSize()));
          row.add(IntegerUtil.toBytes(exec.getActiveCount()));
          row.add(IntegerUtil.toBytes(exec.getQueue().size()));
          row.add(LongUtil.toBytes(exec.getCompletedTaskCount()));
          row.add(LongUtil.toBytes(exec.getTaskCount()));
          return row;
      }
  
      private static RowDataPacket getRow(NameableScheduledThreadPoolExecutor exec, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(StringUtil.encode(exec.getName(), charset));
          row.add(IntegerUtil.toBytes(exec.getPoolSize()));
          row.add(IntegerUtil.toBytes(exec.getActiveCount()));
          row.add(IntegerUtil.toBytes(exec.getQueue().size()));
          row.add(LongUtil.toBytes(exec.getCompletedTaskCount()));
          row.add(LongUtil.toBytes(exec.getTaskCount()));
          return row;
      }
  }
  