text: /**
   * Copyright (c) 2021 OceanBase
   * OceanBase Database Proxy(ODP) 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.
   */
  
  #define USING_LOG_PREFIX PROXY_ICMD
  
  #include "iocore/eventsystem/ob_event_processor.h"
  #include "iocore/eventsystem/ob_task.h"
  #include "cmd/ob_show_resource_handler.h"
  #include "obutils/ob_resource_pool_processor.h"
  
  using namespace oceanbase::common;
  using namespace oceanbase::obmysql;
  using namespace oceanbase::obproxy::event;
  using namespace oceanbase::obproxy::net;
  
  namespace oceanbase
  {
  namespace obproxy
  {
  namespace obutils
  {
  
  // ClusterColumn
  enum
  {
    OB_CR_NAME = 0,
    OB_CR_ID,
    OB_CR_STATE,
    OB_CR_VERSION,
    OB_CR_REF_COUNT,
    OB_CR_LAST_ACCESS_TIME_NS,
    OB_CR_LAST_ACCESS_TIME_STR,
    OB_CR_DELETING_COMPLETE_THREAD_NUM,
    OB_CR_FETCH_RS_LIST_TASK_COUNT,
    OB_CR_LAST_FETCH_RS_LIST_TIME_NS,
    OB_CR_LAST_FETCH_RS_LIST_TIME_STR,
    OB_CR_FETCH_IDC_LIST_TASK_COUNT,
    OB_CR_LAST_FETCH_IDC_LIST_TIME_NS,
    OB_CR_LAST_FETCH_IDC_LIST_TIME_STR,
    OB_CR_MAX_RESOURCE_COLUMN_ID,
  };
  
  const ObProxyColumnSchema RESOURCE_COLUMN_ARRAY[OB_CR_MAX_RESOURCE_COLUMN_ID] = {
    ObProxyColumnSchema::make_schema(OB_CR_NAME,                "cluster_name",        obmysql::OB_MYSQL_TYPE_VARCHAR),
    ObProxyColumnSchema::make_schema(OB_CR_ID,                  "cluster_id",          obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_STATE,               "state",               obmysql::OB_MYSQL_TYPE_VARCHAR),
    ObProxyColumnSchema::make_schema(OB_CR_VERSION,             "version",             obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_REF_COUNT,           "ref_count",           obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_ACCESS_TIME_NS, "last_access_time_ns", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_ACCESS_TIME_STR, "last_access_time",   obmysql::OB_MYSQL_TYPE_VARCHAR),
    ObProxyColumnSchema::make_schema(OB_CR_DELETING_COMPLETE_THREAD_NUM, "deleting_completed_thread_num", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_FETCH_RS_LIST_TASK_COUNT, "fetch_rs_list_task_count", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_FETCH_RS_LIST_TIME_NS, "last_fetch_rs_list_time_ns", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_FETCH_RS_LIST_TIME_STR, "last_fetch_rs_list_time", obmysql::OB_MYSQL_TYPE_VARCHAR),
    ObProxyColumnSchema::make_schema(OB_CR_FETCH_IDC_LIST_TASK_COUNT, "fetch_idc_list_task_count", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_FETCH_IDC_LIST_TIME_NS, "last_fetch_idc_list_time_ns", obmysql::OB_MYSQL_TYPE_LONGLONG),
    ObProxyColumnSchema::make_schema(OB_CR_LAST_FETCH_IDC_LIST_TIME_STR, "last_fetch_idc_list_time", obmysql::OB_MYSQL_TYPE_VARCHAR),
  };
  
  ObShowResourceHandler::ObShowResourceHandler(ObContinuation *cont, ObMIOBuffer *buf,
                                               const ObInternalCmdInfo &info)
    : ObInternalCmdHandler(cont, buf, info)
  {
    SET_HANDLER(&ObShowResourceHandler::handle_show_resource);
  }
  
  int ObShowResourceHandler::dump_resource_header()
  {
    int ret = OB_SUCCESS;
    if (OB_FAIL(encode_header(RESOURCE_COLUMN_ARRAY, OB_CR_MAX_RESOURCE_COLUMN_ID))) {
      WARN_ICMD("fail to encode header", K(ret));
    }
    return ret;
  }
  
  int ObShowResourceHandler::handle_show_resource(int event, void *data)
  {
    int event_ret = EVENT_DONE;
    int ret = OB_SUCCESS;
    ObSEArray<ObClusterResource *, 32> cr_array;
    if (OB_UNLIKELY(!is_argument_valid(event, data))) {
      ret = OB_INVALID_ARGUMENT;
      WARN_ICMD("invalid argument, it should not happen", K(event), K(data), K_(is_inited), K(ret));
    } else if (OB_FAIL(dump_resource_header())) {
      WARN_ICMD("fail to dump resource info header", K(ret));
    } else if (OB_FAIL(get_global_resource_pool_processor().acquire_all_cluster_resource(cr_array))) {
      WARN_ICMD("fail to acquire all cluster resource from resource_pool", K(ret));
    } else {
      ObClusterResource *cr = NULL;
      for (int64_t i = 0; (i < cr_array.count()) && OB_SUCC(ret); ++i) {
        cr = cr_array.at(i);
        if (match_like(cr->get_cluster_name().ptr(), like_name_)) {
          if (OB_FAIL(dump_resource_item(cr))) {
            LOG_WARN("fail to dump cluster resource", KPC(cr), K(ret));
          }
        }
      }
    }
  
    if (OB_SUCC(ret)) {
      if (OB_FAIL(encode_eof_packet())) {
        WARN_ICMD("fail to encode eof packet", K(ret));
      } else {
        INFO_ICMD("succ to dump cluster resource", K_(like_name));
        event_ret = handle_callback(INTERNAL_CMD_EVENTS_SUCCESS, NULL);
      }
    }
  
    for (int64_t i = 0; i < cr_array.count(); ++i) {
      cr_array.at(i)->dec_ref();
    }
    cr_array.reset();
  
    if (OB_FAIL(ret)) {
      event_ret = internal_error_callback(ret);
    }
    return event_ret;
  }
  
  int ObShowResourceHandler::dump_resource_item(const ObClusterResource *cr)
  {
    int ret = OB_SUCCESS;
    if (OB_LIKELY(NULL != cr)) {
      char access_timebuf[64] = {'\0'};
      char rs_timebuf[64] = {'\0'};
      char idc_timebuf[64] = {'\0'};
      time_t t = 0;
      struct tm struct_tm;
      MEMSET(&struct_tm, 0, sizeof(struct tm));
      ObNewRow row;
      ObObj cells[OB_CR_MAX_RESOURCE_COLUMN_ID];
      cells[OB_CR_NAME].set_varchar(cr->get_cluster_name());
      cells[OB_CR_ID].set_int(cr->get_cluster_id());
      cells[OB_CR_STATE].set_varchar(cr->get_cr_state_str());
      cells[OB_CR_VERSION].set_int(cr->version_);
      cells[OB_CR_REF_COUNT].set_int(cr->ref_count_);
      cells[OB_CR_LAST_ACCESS_TIME_NS].set_int(cr->last_access_time_ns_);
      cells[OB_CR_LAST_FETCH_IDC_LIST_TIME_NS].set_int(cr->last_idc_list_refresh_time_ns_);
      cells[OB_CR_LAST_FETCH_RS_LIST_TIME_NS].set_int(cr->last_rslist_refresh_time_ns_);
      cells[OB_CR_DELETING_COMPLETE_THREAD_NUM].set_int(cr->deleting_completed_thread_num_);
      cells[OB_CR_FETCH_RS_LIST_TASK_COUNT].set_int(cr->fetch_rslist_task_count_);
      cells[OB_CR_FETCH_IDC_LIST_TASK_COUNT].set_int(cr->fetch_idc_list_task_count_);
  
      t = hrtime_to_sec(cr->last_access_time_ns_); // to second
      if (OB_ISNULL(localtime_r(&t, &struct_tm))) {
        ret = OB_ERR_UNEXPECTED;
        WARN_ICMD("fail to converts the calendar time timep to broken-time representation", K(t), K(ret));
      } else {
        int64_t strftime_len = strftime(access_timebuf, sizeof(access_timebuf), "%Y-%m-%d %H:%M:%S", &struct_tm);
        if (OB_UNLIKELY(strftime_len <= 0) || OB_UNLIKELY(strftime_len >= sizeof(access_timebuf))) {
          ret = OB_BUF_NOT_ENOUGH;
          WARN_ICMD("timebuf is not enough", K(strftime_len), "timebuf length",
                    sizeof(access_timebuf), K(access_timebuf), K(ret));
        } else {
          cells[OB_CR_LAST_ACCESS_TIME_STR].set_varchar(access_timebuf);
        }
      }
  
      t = hrtime_to_sec(cr->last_rslist_refresh_time_ns_); // to second
      if (OB_ISNULL(localtime_r(&t, &struct_tm))) {
        ret = OB_ERR_UNEXPECTED;
        WARN_ICMD("fail to converts the calendar time timep to broken-time representation", K(t), K(ret));
      } else {
        int64_t strftime_len = strftime(rs_timebuf, sizeof(rs_timebuf), "%Y-%m-%d %H:%M:%S", &struct_tm);
        if (OB_UNLIKELY(strftime_len <= 0) || OB_UNLIKELY(strftime_len >= sizeof(rs_timebuf))) {
          ret = OB_BUF_NOT_ENOUGH;
          WARN_ICMD("rs_timebuf is not enough", K(strftime_len), "rs_timebuf length",
                    sizeof(rs_timebuf), K(rs_timebuf), K(ret));
        } else {
          cells[OB_CR_LAST_FETCH_RS_LIST_TIME_STR].set_varchar(rs_timebuf);
        }
      }
  
      t = hrtime_to_sec(cr->last_idc_list_refresh_time_ns_); // to second
      if (OB_ISNULL(localtime_r(&t, &struct_tm))) {
        ret = OB_ERR_UNEXPECTED;
        WARN_ICMD("fail to converts the calendar time timep to broken-time representation", K(t), K(ret));
      } else {
        int64_t strftime_len = strftime(idc_timebuf, sizeof(idc_timebuf), "%Y-%m-%d %H:%M:%S", &struct_tm);
        if (OB_UNLIKELY(strftime_len <= 0) || OB_UNLIKELY(strftime_len >= sizeof(idc_timebuf))) {
          ret = OB_BUF_NOT_ENOUGH;
          WARN_ICMD("idc_timebuf is not enough", K(strftime_len), "idc_timebuf length",
                    sizeof(idc_timebuf), K(idc_timebuf), K(ret));
        } else {
          cells[OB_CR_LAST_FETCH_IDC_LIST_TIME_STR].set_varchar(idc_timebuf);
        }
      }
  
      if (OB_SUCC(ret)) {
        row.cells_ = cells;
        row.count_ = OB_CR_MAX_RESOURCE_COLUMN_ID;
        if (OB_FAIL(encode_row_packet(row))) {
          WARN_ICMD("fail to encode row packet", K(row), K(ret));
        }
      }
    }
  
    return ret;
  }
  
  static int show_resource_cmd_callback(
      ObContinuation *cont, ObInternalCmdInfo &info,
      ObMIOBuffer *buf, ObAction *&action)
  {
    int ret = OB_SUCCESS;
    action = NULL;
    ObShowResourceHandler *handler = NULL;
  
    if (OB_UNLIKELY(!ObInternalCmdHandler::is_constructor_argument_valid(cont, buf))) {
      ret = OB_INVALID_ARGUMENT;
      WARN_ICMD("constructor argument is invalid", K(cont), K(buf), K(ret));
    } else if (OB_ISNULL(handler = new(std::nothrow) ObShowResourceHandler(cont, buf, info))) {
      ret = OB_ALLOCATE_MEMORY_FAILED;
      ERROR_ICMD("fail to new ObShowResourceHandler", K(ret));
    } else if (OB_FAIL(handler->init())) {
      WARN_ICMD("fail to init for ObShowResourceHandler");
    } else {
      action = &handler->get_action();
      if (OB_ISNULL(g_event_processor.schedule_imm(handler, ET_TASK))) {
        ret = OB_ALLOCATE_MEMORY_FAILED;
        ERROR_ICMD("fail to schedule ObShowResourceHandler", K(ret));
        action = NULL;
      } else {
        DEBUG_ICMD("succ to schedule ObShowResourceHandler");
      }
    }
  
    if (OB_FAIL(ret) && OB_LIKELY(NULL != handler)) {
      delete handler;
      handler = NULL;
    }
    return ret;
  }
  
  int show_resource_cmd_init()
  {
    int ret = OB_SUCCESS;
    if (OB_FAIL(get_global_internal_cmd_processor().register_cmd(OBPROXY_T_ICMD_SHOW_RESOURCE,
                                                                 &show_resource_cmd_callback))) {
      WARN_ICMD("fail to proxy_resource_callback", K(ret));
    }
    return ret;
  }
  
  } // end of namespace proxy
  } // end of namespace obproxy
  } // end of namespace oceanbase
  