/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef OCEANBASE_OBSERVER_VIRTUAL_TABLE_OB_INFORMATION_KVCACHE_TABLE_
#define OCEANBASE_OBSERVER_VIRTUAL_TABLE_OB_INFORMATION_KVCACHE_TABLE_

#include "share/ob_virtual_table_scanner_iterator.h"
#include "share/cache/ob_kv_storecache.h"
#include "lib/stat/ob_di_cache.h"

namespace oceanbase {
namespace common {
class ObObj;
}

namespace observer {

class ObInfoSchemaKvCacheTable : public common::ObVirtualTableScannerIterator {
public:
  ObInfoSchemaKvCacheTable();
  virtual ~ObInfoSchemaKvCacheTable();
  virtual int inner_get_next_row(common::ObNewRow*& row);
  virtual void reset();
  inline void set_addr(common::ObAddr& addr)
  {
    addr_ = &addr;
  }
  virtual int set_ip(common::ObAddr* addr);

private:
  enum CACHE_COLUMN {
    TENANT_ID = common::OB_APP_MIN_COLUMN_ID,
    SVR_IP,
    SVR_PORT,
    CACHE_NAME,
    CACHE_ID,
    PRIORITY,
    CACHE_SIZE,
    CACHE_STORE_SIZE,
    CACHE_MAP_SIZE,
    KV_CNT,
    HIT_RATIO,
    TOTAL_PUT_CNT,
    TOTAL_HIT_CNT,
    TOTAL_MISS_CNT,
    HOLD_SIZE
  };
  common::ObAddr* addr_;
  common::ObString ipstr_;
  int32_t port_;
  common::ObSEArray<common::ObKVCacheInstHandle, 100> inst_handles_;
  int16_t cache_iter_;
  common::ObStringBuf str_buf_;
  common::ObObj cells_[common::OB_ROW_MAX_COLUMNS_COUNT];
  common::ObArenaAllocator arenallocator_;
  common::ObArray<std::pair<uint64_t, common::ObDiagnoseTenantInfo*> > tenant_dis_;
  DISALLOW_COPY_AND_ASSIGN(ObInfoSchemaKvCacheTable);
};

}  // namespace observer
}  // namespace oceanbase
#endif /* OCEANBASE_OBSERVER_VIRTUAL_TABLE_OB_INFORMATION_KVCACHE_TABLE */
