416 lines
15 KiB
C
416 lines
15 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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#include "tq.h"
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#define IS_OFFSET_RESET_TYPE(_t) ((_t) < 0)
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static int32_t tqSendMetaPollRsp(STqHandle* pHandle, const SRpcMsg* pMsg, const SMqPollReq* pReq,
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const SMqMetaRsp* pRsp, int32_t vgId);
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int32_t tqInitDataRsp(SMqDataRsp* pRsp, const SMqPollReq* pReq) {
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pRsp->reqOffset = pReq->reqOffset;
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pRsp->blockData = taosArrayInit(0, sizeof(void*));
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pRsp->blockDataLen = taosArrayInit(0, sizeof(int32_t));
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if (pRsp->blockData == NULL || pRsp->blockDataLen == NULL) {
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return -1;
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}
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pRsp->withTbName = 0;
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pRsp->withSchema = false;
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return 0;
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}
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static int32_t tqInitTaosxRsp(STaosxRsp* pRsp, const SMqPollReq* pReq) {
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pRsp->reqOffset = pReq->reqOffset;
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pRsp->withTbName = 1;
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pRsp->withSchema = 1;
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pRsp->blockData = taosArrayInit(0, sizeof(void*));
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pRsp->blockDataLen = taosArrayInit(0, sizeof(int32_t));
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pRsp->blockTbName = taosArrayInit(0, sizeof(void*));
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pRsp->blockSchema = taosArrayInit(0, sizeof(void*));
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if (pRsp->blockData == NULL || pRsp->blockDataLen == NULL || pRsp->blockTbName == NULL || pRsp->blockSchema == NULL) {
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if (pRsp->blockData != NULL) {
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pRsp->blockData = taosArrayDestroy(pRsp->blockData);
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}
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if (pRsp->blockDataLen != NULL) {
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pRsp->blockDataLen = taosArrayDestroy(pRsp->blockDataLen);
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}
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if (pRsp->blockTbName != NULL) {
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pRsp->blockTbName = taosArrayDestroy(pRsp->blockTbName);
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}
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if (pRsp->blockSchema != NULL) {
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pRsp->blockSchema = taosArrayDestroy(pRsp->blockSchema);
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}
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return -1;
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}
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return 0;
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}
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static int32_t extractResetOffsetVal(STqOffsetVal* pOffsetVal, STQ* pTq, STqHandle* pHandle, const SMqPollReq* pRequest, SRpcMsg* pMsg, bool* pBlockReturned) {
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uint64_t consumerId = pRequest->consumerId;
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STqOffsetVal reqOffset = pRequest->reqOffset;
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STqOffset* pOffset = tqOffsetRead(pTq->pOffsetStore, pRequest->subKey);
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int32_t vgId = TD_VID(pTq->pVnode);
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*pBlockReturned = false;
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// In this vnode, data has been polled by consumer for this topic, so let's continue from the last offset value.
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if (pOffset != NULL) {
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*pOffsetVal = pOffset->val;
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char formatBuf[TSDB_OFFSET_LEN] = {0};
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tFormatOffset(formatBuf, TSDB_OFFSET_LEN, pOffsetVal);
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tqDebug("tmq poll: consumer:0x%" PRIx64
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", subkey %s, vgId:%d, existed offset found, offset reset to %s and continue. reqId:0x%" PRIx64,
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consumerId, pHandle->subKey, vgId, formatBuf, pRequest->reqId);
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return 0;
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} else {
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// no poll occurs in this vnode for this topic, let's seek to the right offset value.
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if (reqOffset.type == TMQ_OFFSET__RESET_EARLIEST) {
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if (pRequest->useSnapshot) {
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tqDebug("tmq poll: consumer:0x%" PRIx64 ", subkey:%s, vgId:%d, (earliest) set offset to be snapshot",
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consumerId, pHandle->subKey, vgId);
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if (pHandle->fetchMeta) {
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tqOffsetResetToMeta(pOffsetVal, 0);
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} else {
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tqOffsetResetToData(pOffsetVal, 0, 0);
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}
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} else {
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walRefFirstVer(pTq->pVnode->pWal, pHandle->pRef);
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tqOffsetResetToLog(pOffsetVal, pHandle->pRef->refVer);
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}
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} else if (reqOffset.type == TMQ_OFFSET__RESET_LATEST) {
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walRefLastVer(pTq->pVnode->pWal, pHandle->pRef);
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SMqDataRsp dataRsp = {0};
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tqInitDataRsp(&dataRsp, pRequest);
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tqOffsetResetToLog(&dataRsp.rspOffset, pHandle->pRef->refVer + 1);
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tqDebug("tmq poll: consumer:0x%" PRIx64 ", subkey %s, vgId:%d, (latest) offset reset to %" PRId64, consumerId,
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pHandle->subKey, vgId, dataRsp.rspOffset.version);
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int32_t code = tqSendDataRsp(pHandle, pMsg, pRequest, &dataRsp, TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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tDeleteMqDataRsp(&dataRsp);
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*pBlockReturned = true;
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return code;
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} else if (reqOffset.type == TMQ_OFFSET__RESET_NONE) {
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tqError("tmq poll: subkey:%s, no offset committed for consumer:0x%" PRIx64
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" in vg %d, subkey %s, reset none failed",
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pHandle->subKey, consumerId, vgId, pRequest->subKey);
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terrno = TSDB_CODE_TQ_NO_COMMITTED_OFFSET;
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return -1;
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}
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}
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return 0;
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}
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static void setRequestVersion(STqOffsetVal* offset, int64_t ver){
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if(offset->type == TMQ_OFFSET__LOG){
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offset->version = ver + 1;
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}
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}
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static int32_t extractDataAndRspForNormalSubscribe(STQ* pTq, STqHandle* pHandle, const SMqPollReq* pRequest,
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SRpcMsg* pMsg, STqOffsetVal* pOffset) {
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uint64_t consumerId = pRequest->consumerId;
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int32_t vgId = TD_VID(pTq->pVnode);
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terrno = 0;
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SMqDataRsp dataRsp = {0};
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tqInitDataRsp(&dataRsp, pRequest);
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dataRsp.reqOffset.type = pOffset->type; // stroe origin type for getting offset in tmq_get_vgroup_offset
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qSetTaskId(pHandle->execHandle.task, consumerId, pRequest->reqId);
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int code = tqScanData(pTq, pHandle, &dataRsp, pOffset);
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if (code != 0 && terrno != TSDB_CODE_WAL_LOG_NOT_EXIST) {
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goto end;
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}
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// till now, all data has been transferred to consumer, new data needs to push client once arrived.
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if (terrno == TSDB_CODE_WAL_LOG_NOT_EXIST && dataRsp.blockNum == 0) {
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// lock
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taosWLockLatch(&pTq->lock);
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int64_t ver = walGetCommittedVer(pTq->pVnode->pWal);
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if (pOffset->version >= ver ||
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dataRsp.rspOffset.version >= ver) { // check if there are data again to avoid lost data
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code = tqRegisterPushHandle(pTq, pHandle, pMsg);
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taosWUnLockLatch(&pTq->lock);
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goto end;
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}
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taosWUnLockLatch(&pTq->lock);
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}
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setRequestVersion(&dataRsp.reqOffset, pOffset->version);
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code = tqSendDataRsp(pHandle, pMsg, pRequest, (SMqDataRsp*)&dataRsp, TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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end : {
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char buf[TSDB_OFFSET_LEN] = {0};
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tFormatOffset(buf, TSDB_OFFSET_LEN, &dataRsp.rspOffset);
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tqDebug("tmq poll: consumer:0x%" PRIx64 ", subkey %s, vgId:%d, rsp block:%d, rsp offset type:%s, reqId:0x%" PRIx64
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" code:%d",
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consumerId, pHandle->subKey, vgId, dataRsp.blockNum, buf, pRequest->reqId, code);
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tDeleteMqDataRsp(&dataRsp);
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return code;
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}
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}
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static int32_t extractDataAndRspForDbStbSubscribe(STQ* pTq, STqHandle* pHandle, const SMqPollReq* pRequest,
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SRpcMsg* pMsg, STqOffsetVal* offset) {
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int code = 0;
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int32_t vgId = TD_VID(pTq->pVnode);
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SWalCkHead* pCkHead = NULL;
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SMqMetaRsp metaRsp = {0};
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STaosxRsp taosxRsp = {0};
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tqInitTaosxRsp(&taosxRsp, pRequest);
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taosxRsp.reqOffset.type = offset->type; // store origin type for getting offset in tmq_get_vgroup_offset
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if (offset->type != TMQ_OFFSET__LOG) {
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if (tqScanTaosx(pTq, pHandle, &taosxRsp, &metaRsp, offset) < 0) {
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code = -1;
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goto end;
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}
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if (metaRsp.metaRspLen > 0) {
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code = tqSendMetaPollRsp(pHandle, pMsg, pRequest, &metaRsp, vgId);
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tqDebug("tmq poll: consumer:0x%" PRIx64 " subkey:%s vgId:%d, send meta offset type:%d,uid:%" PRId64
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",ts:%" PRId64,
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pRequest->consumerId, pHandle->subKey, vgId, metaRsp.rspOffset.type, metaRsp.rspOffset.uid,
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metaRsp.rspOffset.ts);
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taosMemoryFree(metaRsp.metaRsp);
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goto end;
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}
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tqDebug("taosx poll: consumer:0x%" PRIx64 " subkey:%s vgId:%d, send data blockNum:%d, offset type:%d,uid:%" PRId64
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",ts:%" PRId64,
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pRequest->consumerId, pHandle->subKey, vgId, taosxRsp.blockNum, taosxRsp.rspOffset.type,
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taosxRsp.rspOffset.uid, taosxRsp.rspOffset.ts);
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if (taosxRsp.blockNum > 0) {
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code = tqSendDataRsp(pHandle, pMsg, pRequest, (SMqDataRsp*)&taosxRsp, TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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goto end;
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} else {
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*offset = taosxRsp.rspOffset;
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}
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}
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if (offset->type == TMQ_OFFSET__LOG) {
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walReaderVerifyOffset(pHandle->pWalReader, offset);
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int64_t fetchVer = offset->version;
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pCkHead = taosMemoryMalloc(sizeof(SWalCkHead) + 2048);
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if (pCkHead == NULL) {
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terrno = TSDB_CODE_OUT_OF_MEMORY;
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code = -1;
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goto end;
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}
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walSetReaderCapacity(pHandle->pWalReader, 2048);
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int totalRows = 0;
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while (1) {
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int32_t savedEpoch = atomic_load_32(&pHandle->epoch);
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if (savedEpoch > pRequest->epoch) {
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tqWarn("tmq poll: consumer:0x%" PRIx64 " (epoch %d), subkey:%s vgId:%d offset %" PRId64
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", found new consumer epoch %d, discard req epoch %d",
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pRequest->consumerId, pRequest->epoch, pHandle->subKey, vgId, fetchVer, savedEpoch, pRequest->epoch);
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break;
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}
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if (tqFetchLog(pTq, pHandle, &fetchVer, &pCkHead, pRequest->reqId) < 0) {
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tqOffsetResetToLog(&taosxRsp.rspOffset, fetchVer);
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setRequestVersion(&taosxRsp.reqOffset, offset->version);
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code = tqSendDataRsp(pHandle, pMsg, pRequest, (SMqDataRsp*)&taosxRsp, TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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goto end;
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}
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SWalCont* pHead = &pCkHead->head;
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tqDebug("tmq poll: consumer:0x%" PRIx64 " (epoch %d) iter log, vgId:%d offset %" PRId64 " msgType %d",
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pRequest->consumerId, pRequest->epoch, vgId, fetchVer, pHead->msgType);
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// process meta
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if (pHead->msgType != TDMT_VND_SUBMIT) {
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if (totalRows > 0) {
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tqOffsetResetToLog(&taosxRsp.rspOffset, fetchVer);
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setRequestVersion(&taosxRsp.reqOffset, offset->version);
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code = tqSendDataRsp(pHandle, pMsg, pRequest, (SMqDataRsp*)&taosxRsp, TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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goto end;
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}
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tqDebug("fetch meta msg, ver:%" PRId64 ", type:%s", pHead->version, TMSG_INFO(pHead->msgType));
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tqOffsetResetToLog(&metaRsp.rspOffset, fetchVer + 1);
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metaRsp.resMsgType = pHead->msgType;
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metaRsp.metaRspLen = pHead->bodyLen;
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metaRsp.metaRsp = pHead->body;
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code = tqSendMetaPollRsp(pHandle, pMsg, pRequest, &metaRsp, vgId);
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goto end;
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}
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// process data
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SPackedData submit = {
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.msgStr = POINTER_SHIFT(pHead->body, sizeof(SSubmitReq2Msg)),
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.msgLen = pHead->bodyLen - sizeof(SSubmitReq2Msg),
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.ver = pHead->version,
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};
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code = tqTaosxScanLog(pTq, pHandle, submit, &taosxRsp, &totalRows);
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if (code < 0) {
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tqError("tmq poll: tqTaosxScanLog error %" PRId64 ", in vgId:%d, subkey %s", pRequest->consumerId, vgId,
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pRequest->subKey);
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goto end;
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}
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if (totalRows >= 4096 || taosxRsp.createTableNum > 0) {
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tqOffsetResetToLog(&taosxRsp.rspOffset, fetchVer + 1);
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setRequestVersion(&taosxRsp.reqOffset, offset->version);
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code = tqSendDataRsp(pHandle, pMsg, pRequest, (SMqDataRsp*)&taosxRsp, taosxRsp.createTableNum > 0 ? TMQ_MSG_TYPE__POLL_DATA_META_RSP : TMQ_MSG_TYPE__POLL_DATA_RSP, vgId);
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goto end;
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} else {
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fetchVer++;
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}
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}
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}
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end:
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tDeleteSTaosxRsp(&taosxRsp);
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taosMemoryFreeClear(pCkHead);
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return code;
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}
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int32_t tqExtractDataForMq(STQ* pTq, STqHandle* pHandle, const SMqPollReq* pRequest, SRpcMsg* pMsg) {
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int32_t code = -1;
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STqOffsetVal offset = {0};
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STqOffsetVal reqOffset = pRequest->reqOffset;
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// 1. reset the offset if needed
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if (IS_OFFSET_RESET_TYPE(reqOffset.type)) {
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// handle the reset offset cases, according to the consumer's choice.
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bool blockReturned = false;
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code = extractResetOffsetVal(&offset, pTq, pHandle, pRequest, pMsg, &blockReturned);
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if (code != 0) {
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return code;
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}
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// empty block returned, quit
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if (blockReturned) {
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return 0;
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}
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} else if(reqOffset.type != 0){ // use the consumer specified offset
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// the offset value can not be monotonious increase??
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offset = reqOffset;
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} else {
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return TSDB_CODE_TMQ_INVALID_MSG;
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}
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// this is a normal subscribe requirement
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if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__COLUMN) {
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return extractDataAndRspForNormalSubscribe(pTq, pHandle, pRequest, pMsg, &offset);
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} else { // todo handle the case where re-balance occurs.
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// for taosx
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return extractDataAndRspForDbStbSubscribe(pTq, pHandle, pRequest, pMsg, &offset);
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}
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}
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static void initMqRspHead(SMqRspHead* pMsgHead, int32_t type, int32_t epoch, int64_t consumerId, int64_t sver,
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int64_t ever) {
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pMsgHead->consumerId = consumerId;
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pMsgHead->epoch = epoch;
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pMsgHead->mqMsgType = type;
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pMsgHead->walsver = sver;
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pMsgHead->walever = ever;
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}
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int32_t tqSendMetaPollRsp(STqHandle* pHandle, const SRpcMsg* pMsg, const SMqPollReq* pReq, const SMqMetaRsp* pRsp,
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int32_t vgId) {
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int32_t len = 0;
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int32_t code = 0;
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tEncodeSize(tEncodeMqMetaRsp, pRsp, len, code);
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if (code < 0) {
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return -1;
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}
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int32_t tlen = sizeof(SMqRspHead) + len;
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void* buf = rpcMallocCont(tlen);
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if (buf == NULL) {
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return -1;
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}
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int64_t sver = 0, ever = 0;
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walReaderValidVersionRange(pHandle->execHandle.pTqReader->pWalReader, &sver, &ever);
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initMqRspHead(buf, TMQ_MSG_TYPE__POLL_META_RSP, pReq->epoch, pReq->consumerId, sver, ever);
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void* abuf = POINTER_SHIFT(buf, sizeof(SMqRspHead));
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SEncoder encoder = {0};
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tEncoderInit(&encoder, abuf, len);
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tEncodeMqMetaRsp(&encoder, pRsp);
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tEncoderClear(&encoder);
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SRpcMsg resp = {.info = pMsg->info, .pCont = buf, .contLen = tlen, .code = 0};
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tmsgSendRsp(&resp);
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tqDebug("vgId:%d, from consumer:0x%" PRIx64 " (epoch %d) send rsp, res msg type %d, offset type:%d", vgId,
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pReq->consumerId, pReq->epoch, pRsp->resMsgType, pRsp->rspOffset.type);
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return 0;
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}
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int32_t tqDoSendDataRsp(const SRpcHandleInfo* pRpcHandleInfo, const SMqDataRsp* pRsp, int32_t epoch, int64_t consumerId,
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int32_t type, int64_t sver, int64_t ever) {
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int32_t len = 0;
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int32_t code = 0;
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if (type == TMQ_MSG_TYPE__POLL_DATA_RSP || type == TMQ_MSG_TYPE__WALINFO_RSP) {
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tEncodeSize(tEncodeMqDataRsp, pRsp, len, code);
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} else if (type == TMQ_MSG_TYPE__POLL_DATA_META_RSP) {
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tEncodeSize(tEncodeSTaosxRsp, (STaosxRsp*)pRsp, len, code);
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}
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if (code < 0) {
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return -1;
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}
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int32_t tlen = sizeof(SMqRspHead) + len;
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void* buf = rpcMallocCont(tlen);
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if (buf == NULL) {
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return -1;
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}
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SMqRspHead* pHead = (SMqRspHead*)buf;
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initMqRspHead(pHead, type, epoch, consumerId, sver, ever);
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void* abuf = POINTER_SHIFT(buf, sizeof(SMqRspHead));
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SEncoder encoder = {0};
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tEncoderInit(&encoder, abuf, len);
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if (type == TMQ_MSG_TYPE__POLL_DATA_RSP || type == TMQ_MSG_TYPE__WALINFO_RSP) {
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tEncodeMqDataRsp(&encoder, pRsp);
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} else if (type == TMQ_MSG_TYPE__POLL_DATA_META_RSP) {
|
|
tEncodeSTaosxRsp(&encoder, (STaosxRsp*)pRsp);
|
|
}
|
|
|
|
tEncoderClear(&encoder);
|
|
SRpcMsg rsp = {.info = *pRpcHandleInfo, .pCont = buf, .contLen = tlen, .code = 0};
|
|
|
|
tmsgSendRsp(&rsp);
|
|
return 0;
|
|
}
|