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.backend.mysql.PacketUtil;
  import com.actiontech.dble.cache.CachePool;
  import com.actiontech.dble.cache.CacheStatic;
  import com.actiontech.dble.cache.LayerCachePool;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.singleton.CacheService;
  import com.actiontech.dble.util.FormatUtil;
  import com.actiontech.dble.util.LongUtil;
  import com.actiontech.dble.util.StringUtil;
  
  import java.nio.ByteBuffer;
  import java.util.Map;
  
  public final class ShowCache {
      private ShowCache() {
      }
  
      private static final int FIELD_COUNT = 8;
      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("CACHE", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("MAX", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("CUR", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("ACCESS", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("HIT", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("PUT", Fields.FIELD_TYPE_LONG);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("LAST_ACCESS", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
          FIELDS[i] = PacketUtil.getField("LAST_PUT", Fields.FIELD_TYPE_VAR_STRING);
          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();
          CacheService cacheService = CacheService.getInstance();
          for (Map.Entry<String, CachePool> entry : cacheService.getAllCachePools().entrySet()) {
              String cacheName = entry.getKey();
              CachePool cachePool = entry.getValue();
              if (cachePool != null) {
                  if (cachePool instanceof LayerCachePool) {
                      for (Map.Entry<String, CacheStatic> staticsEntry : ((LayerCachePool) cachePool).getAllCacheStatic().entrySet()) {
                          RowDataPacket row = getRow(cacheName + '.' + staticsEntry.getKey(), staticsEntry.getValue(), service.getCharset().getResults());
                          row.setPacketId(++packetId);
                          buffer = row.write(buffer, service, true);
                      }
                  } else {
                      RowDataPacket row = getRow(cacheName, cachePool.getCacheStatic(), 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 RowDataPacket getRow(String poolName,
                                          CacheStatic cacheStatic, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(StringUtil.encode(poolName, charset));
          // max size
          row.add(LongUtil.toBytes(cacheStatic.getMaxSize()));
          row.add(LongUtil.toBytes(cacheStatic.getItemSize()));
          row.add(LongUtil.toBytes(cacheStatic.getAccessTimes()));
          row.add(LongUtil.toBytes(cacheStatic.getHitTimes()));
          row.add(LongUtil.toBytes(cacheStatic.getPutTimes()));
          row.add(StringUtil.encode(FormatUtil.formatDate(cacheStatic.getLastAccessTime()), charset));
          row.add(StringUtil.encode(FormatUtil.formatDate(cacheStatic.getLastPutTime()), charset));
          return row;
      }
  
  }
  