71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_QNODE_H_
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#define _TD_QNODE_H_
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#include "tmsgcb.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* ------------------------ TYPES EXPOSED ------------------------ */
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typedef struct SQnode SQnode;
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typedef struct {
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SMsgCb msgCb;
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} SQnodeOpt;
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/* ------------------------ SQnode ------------------------ */
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/**
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* @brief Start one Qnode in Dnode.
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*
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* @param pOption Option of the qnode.
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* @param pQnode The qnode object.
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* @return int32_t The error code.
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*/
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int32_t qndOpen(const SQnodeOpt *pOption, SQnode **pQnode);
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/**
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* @brief Stop Qnode in Dnode.
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*
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* @param pQnode The qnode object to close.
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*/
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void qndClose(SQnode *pQnode);
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/**
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* @brief Get the statistical information of Qnode
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*
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* @param pQnode The qnode object.
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* @param pLoad Statistics of the qnode.
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* @return int32_t 0 for success, -1 for failure.
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*/
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int32_t qndGetLoad(SQnode *pQnode, SQnodeLoad *pLoad);
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/**
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* @brief Process a query or fetch message.
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*
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* @param pQnode The qnode object.
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* @param pMsg The request message
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*/
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int32_t qndProcessQueryMsg(SQnode *pQnode, SQueueInfo* pInfo, SRpcMsg *pMsg);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_TD_QNODE_H_*/
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