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homework-jianmu/source/dnode/mnode/impl/src/mndConsumer.c

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/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _DEFAULT_SOURCE
#include "mndConsumer.h"
#include "mndPrivilege.h"
#include "mndShow.h"
#include "mndSubscribe.h"
#include "mndTopic.h"
#include "mndTrans.h"
#include "tcompare.h"
#include "tname.h"
#define MND_CONSUMER_VER_NUMBER 2
#define MND_CONSUMER_RESERVE_SIZE 64
#define MND_CONSUMER_LOST_HB_CNT 6
#define MND_CONSUMER_LOST_CLEAR_THRESHOLD 43200
static int32_t mqRebInExecCnt = 0;
static const char *mndConsumerStatusName(int status);
static int32_t mndConsumerActionInsert(SSdb *pSdb, SMqConsumerObj *pConsumer);
static int32_t mndConsumerActionDelete(SSdb *pSdb, SMqConsumerObj *pConsumer);
static int32_t mndConsumerActionUpdate(SSdb *pSdb, SMqConsumerObj *pOldConsumer, SMqConsumerObj *pNewConsumer);
static int32_t mndProcessConsumerMetaMsg(SRpcMsg *pMsg);
static int32_t mndRetrieveConsumer(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBlock, int32_t rows);
static void mndCancelGetNextConsumer(SMnode *pMnode, void *pIter);
static int32_t mndProcessSubscribeReq(SRpcMsg *pMsg);
static int32_t mndProcessAskEpReq(SRpcMsg *pMsg);
static int32_t mndProcessMqHbReq(SRpcMsg *pMsg);
static int32_t mndProcessMqTimerMsg(SRpcMsg *pMsg);
static int32_t mndProcessConsumerLostMsg(SRpcMsg *pMsg);
static int32_t mndProcessConsumerClearMsg(SRpcMsg *pMsg);
static int32_t mndProcessConsumerRecoverMsg(SRpcMsg *pMsg);
int32_t mndInitConsumer(SMnode *pMnode) {
SSdbTable table = {
.sdbType = SDB_CONSUMER,
.keyType = SDB_KEY_INT64,
.encodeFp = (SdbEncodeFp)mndConsumerActionEncode,
.decodeFp = (SdbDecodeFp)mndConsumerActionDecode,
.insertFp = (SdbInsertFp)mndConsumerActionInsert,
.updateFp = (SdbUpdateFp)mndConsumerActionUpdate,
.deleteFp = (SdbDeleteFp)mndConsumerActionDelete,
};
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_SUBSCRIBE, mndProcessSubscribeReq);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_HB, mndProcessMqHbReq);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_ASK_EP, mndProcessAskEpReq);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_TIMER, mndProcessMqTimerMsg);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_CONSUMER_LOST, mndProcessConsumerLostMsg);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_CONSUMER_RECOVER, mndProcessConsumerRecoverMsg);
mndSetMsgHandle(pMnode, TDMT_MND_TMQ_LOST_CONSUMER_CLEAR, mndProcessConsumerClearMsg);
mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_CONSUMERS, mndRetrieveConsumer);
mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_CONSUMERS, mndCancelGetNextConsumer);
return sdbSetTable(pMnode->pSdb, table);
}
void mndCleanupConsumer(SMnode *pMnode) {}
bool mndRebTryStart() {
int32_t old = atomic_val_compare_exchange_32(&mqRebInExecCnt, 0, 1);
mDebug("tq timer, rebalance counter old val:%d", old);
return old == 0;
}
void mndRebEnd() { mndRebCntDec(); }
void mndRebCntInc() {
int32_t val = atomic_add_fetch_32(&mqRebInExecCnt, 1);
mInfo("rebalance trans start, rebalance counter:%d", val);
}
void mndRebCntDec() {
while (1) {
int32_t val = atomic_load_32(&mqRebInExecCnt);
if (val <= 0) {
mError("rebalance trans end, rebalance counter:%d should not be less equalled than 0, ignore counter desc", val);
break;
}
int32_t newVal = val - 1;
int32_t oldVal = atomic_val_compare_exchange_32(&mqRebInExecCnt, val, newVal);
if (oldVal == val) {
mDebug("rebalance trans end, rebalance counter:%d", newVal);
break;
}
}
}
static int32_t mndProcessConsumerLostMsg(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
SMqConsumerLostMsg *pLostMsg = pMsg->pCont;
SMqConsumerObj *pConsumer = mndAcquireConsumer(pMnode, pLostMsg->consumerId);
if (pConsumer == NULL) {
return 0;
}
mInfo("process consumer lost msg, consumer:0x%" PRIx64 " status:%d(%s)", pLostMsg->consumerId, pConsumer->status,
mndConsumerStatusName(pConsumer->status));
if (pConsumer->status != MQ_CONSUMER_STATUS__READY) {
mndReleaseConsumer(pMnode, pConsumer);
return -1;
}
SMqConsumerObj *pConsumerNew = tNewSMqConsumerObj(pConsumer->consumerId, pConsumer->cgroup);
pConsumerNew->updateType = CONSUMER_UPDATE__LOST;
mndReleaseConsumer(pMnode, pConsumer);
STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_CONFLICT_NOTHING, pMsg, "lost-csm");
if (pTrans == NULL) {
goto FAIL;
}
if (mndSetConsumerCommitLogs(pMnode, pTrans, pConsumerNew) != 0) {
goto FAIL;
}
if (mndTransPrepare(pMnode, pTrans) != 0) {
goto FAIL;
}
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return 0;
FAIL:
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return -1;
}
static int32_t mndProcessConsumerRecoverMsg(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
SMqConsumerRecoverMsg *pRecoverMsg = pMsg->pCont;
SMqConsumerObj *pConsumer = mndAcquireConsumer(pMnode, pRecoverMsg->consumerId);
if (pConsumer == NULL) {
mError("cannot find consumer %" PRId64 " when processing consumer recover msg", pRecoverMsg->consumerId);
return -1;
}
mInfo("receive consumer recover msg, consumer:0x%" PRIx64 " status:%d(%s)", pRecoverMsg->consumerId,
pConsumer->status, mndConsumerStatusName(pConsumer->status));
if (pConsumer->status != MQ_CONSUMER_STATUS__LOST_REBD) {
mndReleaseConsumer(pMnode, pConsumer);
terrno = TSDB_CODE_MND_CONSUMER_NOT_READY;
return -1;
}
SMqConsumerObj *pConsumerNew = tNewSMqConsumerObj(pConsumer->consumerId, pConsumer->cgroup);
pConsumerNew->updateType = CONSUMER_UPDATE__RECOVER;
mndReleaseConsumer(pMnode, pConsumer);
STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, TRN_CONFLICT_NOTHING, pMsg, "recover-csm");
if (pTrans == NULL) {
goto FAIL;
}
if (mndSetConsumerCommitLogs(pMnode, pTrans, pConsumerNew) != 0) goto FAIL;
if (mndTransPrepare(pMnode, pTrans) != 0) goto FAIL;
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return 0;
FAIL:
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return -1;
}
// todo check the clear process
static int32_t mndProcessConsumerClearMsg(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
SMqConsumerClearMsg *pClearMsg = pMsg->pCont;
SMqConsumerObj *pConsumer = mndAcquireConsumer(pMnode, pClearMsg->consumerId);
if (pConsumer == NULL) {
mError("consumer:0x%"PRIx64" failed to be found to clear it", pClearMsg->consumerId);
return 0;
}
mInfo("consumer:0x%" PRIx64 " needs to be cleared, status %s", pClearMsg->consumerId,
mndConsumerStatusName(pConsumer->status));
if (pConsumer->status != MQ_CONSUMER_STATUS__LOST_REBD) {
mndReleaseConsumer(pMnode, pConsumer);
return -1;
}
SMqConsumerObj *pConsumerNew = tNewSMqConsumerObj(pConsumer->consumerId, pConsumer->cgroup);
pConsumerNew->updateType = CONSUMER_UPDATE__LOST;
mndReleaseConsumer(pMnode, pConsumer);
STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, TRN_CONFLICT_NOTHING, pMsg, "clear-csm");
if (pTrans == NULL) goto FAIL;
// this is the drop action, not the update action
if (mndSetConsumerDropLogs(pMnode, pTrans, pConsumerNew) != 0) goto FAIL;
if (mndTransPrepare(pMnode, pTrans) != 0) goto FAIL;
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return 0;
FAIL:
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
mndTransDrop(pTrans);
return -1;
}
static SMqRebInfo *mndGetOrCreateRebSub(SHashObj *pHash, const char *key) {
SMqRebInfo *pRebInfo = taosHashGet(pHash, key, strlen(key) + 1);
if (pRebInfo == NULL) {
pRebInfo = tNewSMqRebSubscribe(key);
if (pRebInfo == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
return NULL;
}
taosHashPut(pHash, key, strlen(key) + 1, pRebInfo, sizeof(SMqRebInfo));
taosMemoryFree(pRebInfo);
pRebInfo = taosHashGet(pHash, key, strlen(key) + 1);
}
return pRebInfo;
}
static void freeRebalanceItem(void *param) {
SMqRebInfo *pInfo = param;
taosArrayDestroy(pInfo->newConsumers);
taosArrayDestroy(pInfo->removedConsumers);
}
static int32_t mndProcessMqTimerMsg(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
SSdb *pSdb = pMnode->pSdb;
SMqConsumerObj *pConsumer;
void *pIter = NULL;
mDebug("start to process mq timer");
// rebalance cannot be parallel
if (!mndRebTryStart()) {
mDebug("mq rebalance already in progress, do nothing");
return 0;
}
SMqDoRebalanceMsg *pRebMsg = rpcMallocCont(sizeof(SMqDoRebalanceMsg));
if (pRebMsg == NULL) {
mError("failed to create the rebalance msg, size:%d, quit mq timer", (int32_t)sizeof(SMqDoRebalanceMsg));
mndRebEnd();
return TSDB_CODE_OUT_OF_MEMORY;
}
pRebMsg->rebSubHash = taosHashInit(64, MurmurHash3_32, true, HASH_NO_LOCK);
if (pRebMsg->rebSubHash == NULL) {
mError("failed to create rebalance hashmap");
rpcFreeCont(pRebMsg);
mndRebEnd();
return TSDB_CODE_OUT_OF_MEMORY;
}
taosHashSetFreeFp(pRebMsg->rebSubHash, freeRebalanceItem);
// iterate all consumers, find all modification
while (1) {
pIter = sdbFetch(pSdb, SDB_CONSUMER, pIter, (void **)&pConsumer);
if (pIter == NULL) {
break;
}
int32_t hbStatus = atomic_add_fetch_32(&pConsumer->hbStatus, 1);
int32_t status = atomic_load_32(&pConsumer->status);
mDebug("check for consumer:0x%" PRIx64 " status:%d(%s), sub-time:%" PRId64 ", uptime:%" PRId64 ", hbstatus:%d",
pConsumer->consumerId, status, mndConsumerStatusName(status), pConsumer->subscribeTime, pConsumer->upTime,
hbStatus);
if (status == MQ_CONSUMER_STATUS__READY) {
if (hbStatus > MND_CONSUMER_LOST_HB_CNT) {
SMqConsumerLostMsg *pLostMsg = rpcMallocCont(sizeof(SMqConsumerLostMsg));
if (pLostMsg == NULL) {
mError("consumer:0x%"PRIx64" failed to transfer consumer status to lost due to out of memory. alloc size:%d",
pConsumer->consumerId, (int32_t)sizeof(SMqConsumerLostMsg));
continue;
}
pLostMsg->consumerId = pConsumer->consumerId;
SRpcMsg rpcMsg = {
.msgType = TDMT_MND_TMQ_CONSUMER_LOST, .pCont = pLostMsg, .contLen = sizeof(SMqConsumerLostMsg)};
mDebug("consumer:0x%"PRIx64" hb not received beyond threshold %d, set to lost", pConsumer->consumerId,
MND_CONSUMER_LOST_HB_CNT);
tmsgPutToQueue(&pMnode->msgCb, WRITE_QUEUE, &rpcMsg);
}
} else if (status == MQ_CONSUMER_STATUS__LOST_REBD) {
// if the client is lost longer than one day, clear it. Otherwise, do nothing about the lost consumers.
if (hbStatus > MND_CONSUMER_LOST_CLEAR_THRESHOLD) {
SMqConsumerClearMsg *pClearMsg = rpcMallocCont(sizeof(SMqConsumerClearMsg));
if (pClearMsg == NULL) {
mError("consumer:0x%"PRIx64" failed to clear consumer due to out of memory. alloc size:%d",
pConsumer->consumerId, (int32_t)sizeof(SMqConsumerClearMsg));
continue;
}
pClearMsg->consumerId = pConsumer->consumerId;
SRpcMsg rpcMsg = {
.msgType = TDMT_MND_TMQ_LOST_CONSUMER_CLEAR, .pCont = pClearMsg, .contLen = sizeof(SMqConsumerClearMsg)};
mDebug("consumer:0x%" PRIx64 " lost beyond threshold %d, clear it", pConsumer->consumerId,
MND_CONSUMER_LOST_CLEAR_THRESHOLD);
tmsgPutToQueue(&pMnode->msgCb, WRITE_QUEUE, &rpcMsg);
}
} else if (status == MQ_CONSUMER_STATUS__LOST) {
taosRLockLatch(&pConsumer->lock);
int32_t topicNum = taosArrayGetSize(pConsumer->currentTopics);
for (int32_t i = 0; i < topicNum; i++) {
char key[TSDB_SUBSCRIBE_KEY_LEN];
char *removedTopic = taosArrayGetP(pConsumer->currentTopics, i);
mndMakeSubscribeKey(key, pConsumer->cgroup, removedTopic);
SMqRebInfo *pRebSub = mndGetOrCreateRebSub(pRebMsg->rebSubHash, key);
taosArrayPush(pRebSub->removedConsumers, &pConsumer->consumerId);
}
taosRUnLockLatch(&pConsumer->lock);
} else { // MQ_CONSUMER_STATUS_REBALANCE
taosRLockLatch(&pConsumer->lock);
int32_t newTopicNum = taosArrayGetSize(pConsumer->rebNewTopics);
for (int32_t i = 0; i < newTopicNum; i++) {
char key[TSDB_SUBSCRIBE_KEY_LEN];
char *newTopic = taosArrayGetP(pConsumer->rebNewTopics, i);
mndMakeSubscribeKey(key, pConsumer->cgroup, newTopic);
SMqRebInfo *pRebSub = mndGetOrCreateRebSub(pRebMsg->rebSubHash, key);
taosArrayPush(pRebSub->newConsumers, &pConsumer->consumerId);
}
int32_t removedTopicNum = taosArrayGetSize(pConsumer->rebRemovedTopics);
for (int32_t i = 0; i < removedTopicNum; i++) {
char key[TSDB_SUBSCRIBE_KEY_LEN];
char *removedTopic = taosArrayGetP(pConsumer->rebRemovedTopics, i);
mndMakeSubscribeKey(key, pConsumer->cgroup, removedTopic);
SMqRebInfo *pRebSub = mndGetOrCreateRebSub(pRebMsg->rebSubHash, key);
taosArrayPush(pRebSub->removedConsumers, &pConsumer->consumerId);
}
taosRUnLockLatch(&pConsumer->lock);
}
mndReleaseConsumer(pMnode, pConsumer);
}
if (taosHashGetSize(pRebMsg->rebSubHash) != 0) {
mInfo("mq rebalance will be triggered");
SRpcMsg rpcMsg = {
.msgType = TDMT_MND_TMQ_DO_REBALANCE,
.pCont = pRebMsg,
.contLen = sizeof(SMqDoRebalanceMsg),
};
tmsgPutToQueue(&pMnode->msgCb, WRITE_QUEUE, &rpcMsg);
} else {
taosHashCleanup(pRebMsg->rebSubHash);
rpcFreeCont(pRebMsg);
mDebug("mq timer finished, no need to re-balance");
mndRebEnd();
}
return 0;
}
static int32_t mndProcessMqHbReq(SRpcMsg *pMsg) {
int32_t code = 0;
SMnode *pMnode = pMsg->info.node;
SMqHbReq req = {0};
if ((code = tDeserializeSMqHbReq(pMsg->pCont, pMsg->contLen, &req)) < 0) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
goto end;
}
int64_t consumerId = req.consumerId;
SMqConsumerObj *pConsumer = mndAcquireConsumer(pMnode, consumerId);
if (pConsumer == NULL) {
mError("consumer:0x%" PRIx64 " not exist", consumerId);
terrno = TSDB_CODE_MND_CONSUMER_NOT_EXIST;
code = -1;
goto end;
}
atomic_store_32(&pConsumer->hbStatus, 0);
int32_t status = atomic_load_32(&pConsumer->status);
if (status == MQ_CONSUMER_STATUS__LOST_REBD) {
mInfo("try to recover consumer:0x%" PRIx64 "", consumerId);
SMqConsumerRecoverMsg *pRecoverMsg = rpcMallocCont(sizeof(SMqConsumerRecoverMsg));
pRecoverMsg->consumerId = consumerId;
SRpcMsg pRpcMsg = {
.msgType = TDMT_MND_TMQ_CONSUMER_RECOVER,
.pCont = pRecoverMsg,
.contLen = sizeof(SMqConsumerRecoverMsg),
};
tmsgPutToQueue(&pMnode->msgCb, WRITE_QUEUE, &pRpcMsg);
}
for(int i = 0; i < taosArrayGetSize(req.topics); i++){
TopicOffsetRows* data = taosArrayGet(req.topics, i);
mDebug("heartbeat report offset rows.%s:%s", pConsumer->cgroup, data->topicName);
SMqSubscribeObj *pSub = mndAcquireSubscribe(pMnode, pConsumer->cgroup, data->topicName);
taosWLockLatch(&pSub->lock);
SMqConsumerEp *pConsumerEp = taosHashGet(pSub->consumerHash, &consumerId, sizeof(int64_t));
if(pConsumerEp){
taosArrayDestroy(pConsumerEp->offsetRows);
pConsumerEp->offsetRows = data->offsetRows;
data->offsetRows = NULL;
}
taosWUnLockLatch(&pSub->lock);
mndReleaseSubscribe(pMnode, pSub);
}
mndReleaseConsumer(pMnode, pConsumer);
end:
tDeatroySMqHbReq(&req);
return code;
}
static int32_t mndProcessAskEpReq(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
SMqAskEpReq req = {0};
SMqAskEpRsp rsp = {0};
if (tDeserializeSMqAskEpReq(pMsg->pCont, pMsg->contLen, &req) < 0) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
return -1;
}
int64_t consumerId = req.consumerId;
int32_t epoch = req.epoch;
SMqConsumerObj *pConsumer = mndAcquireConsumer(pMnode, consumerId);
if (pConsumer == NULL) {
mError("consumer:0x%" PRIx64 " group:%s not exists in sdb", consumerId, req.cgroup);
terrno = TSDB_CODE_MND_CONSUMER_NOT_EXIST;
return -1;
}
int32_t ret = strncmp(req.cgroup, pConsumer->cgroup, tListLen(pConsumer->cgroup));
if (ret != 0) {
mError("consumer:0x%" PRIx64 " group:%s not consistent with data in sdb, saved cgroup:%s", consumerId, req.cgroup,
pConsumer->cgroup);
terrno = TSDB_CODE_MND_CONSUMER_NOT_EXIST;
return -1;
}
atomic_store_32(&pConsumer->hbStatus, 0);
// 1. check consumer status
int32_t status = atomic_load_32(&pConsumer->status);
if (status == MQ_CONSUMER_STATUS__LOST_REBD) {
mInfo("try to recover consumer:0x%" PRIx64, consumerId);
SMqConsumerRecoverMsg *pRecoverMsg = rpcMallocCont(sizeof(SMqConsumerRecoverMsg));
pRecoverMsg->consumerId = consumerId;
SRpcMsg pRpcMsg = {
.msgType = TDMT_MND_TMQ_CONSUMER_RECOVER,
.pCont = pRecoverMsg,
.contLen = sizeof(SMqConsumerRecoverMsg),
};
tmsgPutToQueue(&pMnode->msgCb, WRITE_QUEUE, &pRpcMsg);
}
if (status != MQ_CONSUMER_STATUS__READY) {
mInfo("consumer:0x%" PRIx64 " not ready, status: %s", consumerId, mndConsumerStatusName(status));
terrno = TSDB_CODE_MND_CONSUMER_NOT_READY;
return -1;
}
int32_t serverEpoch = atomic_load_32(&pConsumer->epoch);
// 2. check epoch, only send ep info when epochs do not match
if (epoch != serverEpoch) {
taosRLockLatch(&pConsumer->lock);
mInfo("process ask ep, consumer:0x%" PRIx64 "(epoch %d) update with server epoch %d", consumerId, epoch,
serverEpoch);
int32_t numOfTopics = taosArrayGetSize(pConsumer->currentTopics);
rsp.topics = taosArrayInit(numOfTopics, sizeof(SMqSubTopicEp));
if (rsp.topics == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
taosRUnLockLatch(&pConsumer->lock);
goto FAIL;
}
// handle all topics subscribed by this consumer
for (int32_t i = 0; i < numOfTopics; i++) {
char *topic = taosArrayGetP(pConsumer->currentTopics, i);
SMqSubscribeObj *pSub = mndAcquireSubscribe(pMnode, pConsumer->cgroup, topic);
// txn guarantees pSub is created
taosRLockLatch(&pSub->lock);
SMqSubTopicEp topicEp = {0};
strcpy(topicEp.topic, topic);
// 2.1 fetch topic schema
SMqTopicObj *pTopic = mndAcquireTopic(pMnode, topic);
taosRLockLatch(&pTopic->lock);
tstrncpy(topicEp.db, pTopic->db, TSDB_DB_FNAME_LEN);
topicEp.schema.nCols = pTopic->schema.nCols;
if (topicEp.schema.nCols) {
topicEp.schema.pSchema = taosMemoryCalloc(topicEp.schema.nCols, sizeof(SSchema));
memcpy(topicEp.schema.pSchema, pTopic->schema.pSchema, topicEp.schema.nCols * sizeof(SSchema));
}
taosRUnLockLatch(&pTopic->lock);
mndReleaseTopic(pMnode, pTopic);
// 2.2 iterate all vg assigned to the consumer of that topic
SMqConsumerEp *pConsumerEp = taosHashGet(pSub->consumerHash, &consumerId, sizeof(int64_t));
int32_t vgNum = taosArrayGetSize(pConsumerEp->vgs);
// this customer assigned vgroups
topicEp.vgs = taosArrayInit(vgNum, sizeof(SMqSubVgEp));
if (topicEp.vgs == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
taosRUnLockLatch(&pConsumer->lock);
taosRUnLockLatch(&pSub->lock);
mndReleaseSubscribe(pMnode, pSub);
goto FAIL;
}
for (int32_t j = 0; j < vgNum; j++) {
SMqVgEp *pVgEp = taosArrayGetP(pConsumerEp->vgs, j);
char offsetKey[TSDB_PARTITION_KEY_LEN];
mndMakePartitionKey(offsetKey, pConsumer->cgroup, topic, pVgEp->vgId);
// 2.2.1 build vg ep
SMqSubVgEp vgEp = {
.epSet = pVgEp->epSet,
.vgId = pVgEp->vgId,
.offset = -1,
};
taosArrayPush(topicEp.vgs, &vgEp);
}
taosArrayPush(rsp.topics, &topicEp);
taosRUnLockLatch(&pSub->lock);
mndReleaseSubscribe(pMnode, pSub);
}
taosRUnLockLatch(&pConsumer->lock);
}
// encode rsp
int32_t tlen = sizeof(SMqRspHead) + tEncodeSMqAskEpRsp(NULL, &rsp);
void *buf = rpcMallocCont(tlen);
if (buf == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
return -1;
}
SMqRspHead* pHead = buf;
pHead->mqMsgType = TMQ_MSG_TYPE__EP_RSP;
pHead->epoch = serverEpoch;
pHead->consumerId = pConsumer->consumerId;
pHead->walsver = 0;
pHead->walever = 0;
void *abuf = POINTER_SHIFT(buf, sizeof(SMqRspHead));
tEncodeSMqAskEpRsp(&abuf, &rsp);
// release consumer and free memory
tDeleteSMqAskEpRsp(&rsp);
mndReleaseConsumer(pMnode, pConsumer);
// send rsp
pMsg->info.rsp = buf;
pMsg->info.rspLen = tlen;
return 0;
FAIL:
tDeleteSMqAskEpRsp(&rsp);
mndReleaseConsumer(pMnode, pConsumer);
return -1;
}
int32_t mndSetConsumerDropLogs(SMnode *pMnode, STrans *pTrans, SMqConsumerObj *pConsumer) {
SSdbRaw *pCommitRaw = mndConsumerActionEncode(pConsumer);
if (pCommitRaw == NULL) return -1;
if (mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) return -1;
if (sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED) != 0) return -1;
return 0;
}
int32_t mndSetConsumerCommitLogs(SMnode *pMnode, STrans *pTrans, SMqConsumerObj *pConsumer) {
SSdbRaw *pCommitRaw = mndConsumerActionEncode(pConsumer);
if (pCommitRaw == NULL) return -1;
if (mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) return -1;
if (sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY) != 0) return -1;
return 0;
}
static int32_t validateTopics(const SArray *pTopicList, SMnode *pMnode, const char *pUser) {
int32_t numOfTopics = taosArrayGetSize(pTopicList);
for (int32_t i = 0; i < numOfTopics; i++) {
char *pOneTopic = taosArrayGetP(pTopicList, i);
SMqTopicObj *pTopic = mndAcquireTopic(pMnode, pOneTopic);
if (pTopic == NULL) { // terrno has been set by callee function
return -1;
}
if (mndCheckTopicPrivilege(pMnode, pUser, MND_OPER_SUBSCRIBE, pTopic) != 0) {
mndReleaseTopic(pMnode, pTopic);
return -1;
}
mndReleaseTopic(pMnode, pTopic);
}
return 0;
}
static void *topicNameDup(void *p) { return taosStrdup((char *)p); }
static void freeItem(void *param) {
void *pItem = *(void **)param;
if (pItem != NULL) {
taosMemoryFree(pItem);
}
}
int32_t mndProcessSubscribeReq(SRpcMsg *pMsg) {
SMnode *pMnode = pMsg->info.node;
char *msgStr = pMsg->pCont;
SCMSubscribeReq subscribe = {0};
tDeserializeSCMSubscribeReq(msgStr, &subscribe);
int64_t consumerId = subscribe.consumerId;
char *cgroup = subscribe.cgroup;
SMqConsumerObj *pExistedConsumer = NULL;
SMqConsumerObj *pConsumerNew = NULL;
int32_t code = -1;
SArray *pTopicList = subscribe.topicNames;
taosArraySort(pTopicList, taosArrayCompareString);
taosArrayRemoveDuplicate(pTopicList, taosArrayCompareString, freeItem);
int32_t newTopicNum = taosArrayGetSize(pTopicList);
// check topic existence
STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, TRN_CONFLICT_NOTHING, pMsg, "subscribe");
if (pTrans == NULL) {
goto _over;
}
code = validateTopics(pTopicList, pMnode, pMsg->info.conn.user);
if (code != TSDB_CODE_SUCCESS) {
goto _over;
}
pExistedConsumer = mndAcquireConsumer(pMnode, consumerId);
if (pExistedConsumer == NULL) {
mInfo("receive subscribe request from new consumer:0x%" PRIx64 " cgroup:%s, numOfTopics:%d", consumerId,
subscribe.cgroup, (int32_t)taosArrayGetSize(pTopicList));
pConsumerNew = tNewSMqConsumerObj(consumerId, cgroup);
tstrncpy(pConsumerNew->clientId, subscribe.clientId, tListLen(pConsumerNew->clientId));
pConsumerNew->withTbName = subscribe.withTbName;
pConsumerNew->useSnapshot = subscribe.useSnapshot;
pConsumerNew->autoCommit = subscribe.autoCommit;
pConsumerNew->autoCommitInterval = subscribe.autoCommitInterval;
pConsumerNew->resetOffsetCfg = subscribe.resetOffsetCfg;
// set the update type
pConsumerNew->updateType = CONSUMER_UPDATE__REBALANCE;
taosArrayDestroy(pConsumerNew->assignedTopics);
pConsumerNew->assignedTopics = taosArrayDup(pTopicList, topicNameDup);
// all subscribed topics should re-balance.
taosArrayDestroy(pConsumerNew->rebNewTopics);
pConsumerNew->rebNewTopics = pTopicList;
subscribe.topicNames = NULL;
if (mndSetConsumerCommitLogs(pMnode, pTrans, pConsumerNew) != 0) goto _over;
if (mndTransPrepare(pMnode, pTrans) != 0) goto _over;
} else {
int32_t status = atomic_load_32(&pExistedConsumer->status);
mInfo("receive subscribe request from existed consumer:0x%" PRIx64
" cgroup:%s, current status:%d(%s), subscribe topic num: %d",
consumerId, subscribe.cgroup, status, mndConsumerStatusName(status), newTopicNum);
if (status != MQ_CONSUMER_STATUS__READY) {
terrno = TSDB_CODE_MND_CONSUMER_NOT_READY;
goto _over;
}
pConsumerNew = tNewSMqConsumerObj(consumerId, cgroup);
if (pConsumerNew == NULL) {
goto _over;
}
// set the update type
pConsumerNew->updateType = CONSUMER_UPDATE__REBALANCE;
taosArrayDestroy(pConsumerNew->assignedTopics);
pConsumerNew->assignedTopics = taosArrayDup(pTopicList, topicNameDup);
int32_t oldTopicNum = (pExistedConsumer->currentTopics) ? taosArrayGetSize(pExistedConsumer->currentTopics) : 0;
int32_t i = 0, j = 0;
while (i < oldTopicNum || j < newTopicNum) {
if (i >= oldTopicNum) {
char *newTopicCopy = taosStrdup(taosArrayGetP(pTopicList, j));
taosArrayPush(pConsumerNew->rebNewTopics, &newTopicCopy);
j++;
continue;
} else if (j >= newTopicNum) {
char *oldTopicCopy = taosStrdup(taosArrayGetP(pExistedConsumer->currentTopics, i));
taosArrayPush(pConsumerNew->rebRemovedTopics, &oldTopicCopy);
i++;
continue;
} else {
char *oldTopic = taosArrayGetP(pExistedConsumer->currentTopics, i);
char *newTopic = taosArrayGetP(pTopicList, j);
int comp = strcmp(oldTopic, newTopic);
if (comp == 0) {
i++;
j++;
continue;
} else if (comp < 0) {
char *oldTopicCopy = taosStrdup(oldTopic);
taosArrayPush(pConsumerNew->rebRemovedTopics, &oldTopicCopy);
i++;
continue;
} else {
char *newTopicCopy = taosStrdup(newTopic);
taosArrayPush(pConsumerNew->rebNewTopics, &newTopicCopy);
j++;
continue;
}
}
}
// no topics need to be rebalanced
if (taosArrayGetSize(pConsumerNew->rebNewTopics) == 0 && taosArrayGetSize(pConsumerNew->rebRemovedTopics) == 0) {
goto _over;
}
if (mndSetConsumerCommitLogs(pMnode, pTrans, pConsumerNew) != 0) goto _over;
if (mndTransPrepare(pMnode, pTrans) != 0) goto _over;
}
code = TSDB_CODE_ACTION_IN_PROGRESS;
_over:
mndTransDrop(pTrans);
if (pExistedConsumer) {
/*taosRUnLockLatch(&pExistedConsumer->lock);*/
mndReleaseConsumer(pMnode, pExistedConsumer);
}
if (pConsumerNew) {
tDeleteSMqConsumerObj(pConsumerNew);
taosMemoryFree(pConsumerNew);
}
// TODO: replace with destroy subscribe msg
taosArrayDestroyP(subscribe.topicNames, (FDelete)taosMemoryFree);
return code;
}
SSdbRaw *mndConsumerActionEncode(SMqConsumerObj *pConsumer) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
void *buf = NULL;
int32_t tlen = tEncodeSMqConsumerObj(NULL, pConsumer);
int32_t size = sizeof(int32_t) + tlen + MND_CONSUMER_RESERVE_SIZE;
SSdbRaw *pRaw = sdbAllocRaw(SDB_CONSUMER, MND_CONSUMER_VER_NUMBER, size);
if (pRaw == NULL) goto CM_ENCODE_OVER;
buf = taosMemoryMalloc(tlen);
if (buf == NULL) goto CM_ENCODE_OVER;
void *abuf = buf;
tEncodeSMqConsumerObj(&abuf, pConsumer);
int32_t dataPos = 0;
SDB_SET_INT32(pRaw, dataPos, tlen, CM_ENCODE_OVER);
SDB_SET_BINARY(pRaw, dataPos, buf, tlen, CM_ENCODE_OVER);
SDB_SET_RESERVE(pRaw, dataPos, MND_CONSUMER_RESERVE_SIZE, CM_ENCODE_OVER);
SDB_SET_DATALEN(pRaw, dataPos, CM_ENCODE_OVER);
terrno = TSDB_CODE_SUCCESS;
CM_ENCODE_OVER:
taosMemoryFreeClear(buf);
if (terrno != 0) {
mError("consumer:0x%" PRIx64 " failed to encode to raw:%p since %s", pConsumer->consumerId, pRaw, terrstr());
sdbFreeRaw(pRaw);
return NULL;
}
mTrace("consumer:0x%" PRIx64 ", encode to raw:%p, row:%p", pConsumer->consumerId, pRaw, pConsumer);
return pRaw;
}
SSdbRow *mndConsumerActionDecode(SSdbRaw *pRaw) {
SSdbRow *pRow = NULL;
SMqConsumerObj *pConsumer = NULL;
void *buf = NULL;
terrno = 0;
int8_t sver = 0;
if (sdbGetRawSoftVer(pRaw, &sver) != 0) {
goto CM_DECODE_OVER;
}
if (sver < 1 || sver > MND_CONSUMER_VER_NUMBER) {
terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
goto CM_DECODE_OVER;
}
pRow = sdbAllocRow(sizeof(SMqConsumerObj));
if (pRow == NULL) {
goto CM_DECODE_OVER;
}
pConsumer = sdbGetRowObj(pRow);
if (pConsumer == NULL) {
goto CM_DECODE_OVER;
}
int32_t dataPos = 0;
int32_t len;
SDB_GET_INT32(pRaw, dataPos, &len, CM_DECODE_OVER);
buf = taosMemoryMalloc(len);
if (buf == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
goto CM_DECODE_OVER;
}
SDB_GET_BINARY(pRaw, dataPos, buf, len, CM_DECODE_OVER);
SDB_GET_RESERVE(pRaw, dataPos, MND_CONSUMER_RESERVE_SIZE, CM_DECODE_OVER);
if (tDecodeSMqConsumerObj(buf, pConsumer, sver) == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY; // TODO set correct error code
goto CM_DECODE_OVER;
}
tmsgUpdateDnodeEpSet(&pConsumer->ep);
CM_DECODE_OVER:
taosMemoryFreeClear(buf);
if (terrno != TSDB_CODE_SUCCESS) {
mError("consumer:0x%" PRIx64 " failed to decode from raw:%p since %s",
pConsumer == NULL ? 0 : pConsumer->consumerId, pRaw, terrstr());
taosMemoryFreeClear(pRow);
}
return pRow;
}
static int32_t mndConsumerActionInsert(SSdb *pSdb, SMqConsumerObj *pConsumer) {
mDebug("consumer:0x%" PRIx64 " cgroup:%s status:%d(%s) epoch:%d load from sdb, perform insert action",
pConsumer->consumerId, pConsumer->cgroup, pConsumer->status, mndConsumerStatusName(pConsumer->status),
pConsumer->epoch);
pConsumer->subscribeTime = pConsumer->upTime;
return 0;
}
static int32_t mndConsumerActionDelete(SSdb *pSdb, SMqConsumerObj *pConsumer) {
mDebug("consumer:0x%" PRIx64 " perform delete action, status:(%d)%s", pConsumer->consumerId, pConsumer->status,
mndConsumerStatusName(pConsumer->status));
tDeleteSMqConsumerObj(pConsumer);
return 0;
}
static void updateConsumerStatus(SMqConsumerObj *pConsumer) {
int32_t status = pConsumer->status;
if (taosArrayGetSize(pConsumer->rebNewTopics) == 0 && taosArrayGetSize(pConsumer->rebRemovedTopics) == 0) {
if (status == MQ_CONSUMER_STATUS_REBALANCE) {
pConsumer->status = MQ_CONSUMER_STATUS__READY;
} else if (status == MQ_CONSUMER_STATUS__LOST) {
ASSERT(taosArrayGetSize(pConsumer->currentTopics) == 0);
pConsumer->status = MQ_CONSUMER_STATUS__LOST_REBD;
}
}
}
// remove from new topic
static void removeFromNewTopicList(SMqConsumerObj *pConsumer, const char *pTopic) {
int32_t size = taosArrayGetSize(pConsumer->rebNewTopics);
for (int32_t i = 0; i < size; i++) {
char *p = taosArrayGetP(pConsumer->rebNewTopics, i);
if (strcmp(pTopic, p) == 0) {
taosArrayRemove(pConsumer->rebNewTopics, i);
taosMemoryFree(p);
mDebug("consumer:0x%" PRIx64 " remove new topic:%s in the topic list, remain newTopics:%d", pConsumer->consumerId,
pTopic, (int)taosArrayGetSize(pConsumer->rebNewTopics));
break;
}
}
}
// remove from removed topic
static void removeFromRemoveTopicList(SMqConsumerObj *pConsumer, const char *pTopic) {
int32_t size = taosArrayGetSize(pConsumer->rebRemovedTopics);
for (int32_t i = 0; i < size; i++) {
char *p = taosArrayGetP(pConsumer->rebRemovedTopics, i);
if (strcmp(pTopic, p) == 0) {
taosArrayRemove(pConsumer->rebRemovedTopics, i);
taosMemoryFree(p);
mDebug("consumer:0x%" PRIx64 " remove topic:%s in the removed topic list, remain removedTopics:%d",
pConsumer->consumerId, pTopic, (int)taosArrayGetSize(pConsumer->rebRemovedTopics));
break;
}
}
}
static void removeFromCurrentTopicList(SMqConsumerObj *pConsumer, const char *pTopic) {
int32_t sz = taosArrayGetSize(pConsumer->currentTopics);
for (int32_t i = 0; i < sz; i++) {
char *topic = taosArrayGetP(pConsumer->currentTopics, i);
if (strcmp(pTopic, topic) == 0) {
taosArrayRemove(pConsumer->currentTopics, i);
taosMemoryFree(topic);
mDebug("consumer:0x%" PRIx64 " remove topic:%s in the current topic list, remain currentTopics:%d",
pConsumer->consumerId, pTopic, (int)taosArrayGetSize(pConsumer->currentTopics));
break;
}
}
}
static bool existInCurrentTopicList(const SMqConsumerObj* pConsumer, const char* pTopic) {
bool existing = false;
int32_t size = taosArrayGetSize(pConsumer->currentTopics);
for (int32_t i = 0; i < size; i++) {
char *topic = taosArrayGetP(pConsumer->currentTopics, i);
if (strcmp(topic, pTopic) == 0) {
existing = true;
break;
}
}
return existing;
}
static int32_t mndConsumerActionUpdate(SSdb *pSdb, SMqConsumerObj *pOldConsumer, SMqConsumerObj *pNewConsumer) {
mDebug("consumer:0x%" PRIx64 " perform update action, update type:%d, subscribe-time:%" PRId64 ", uptime:%" PRId64,
pOldConsumer->consumerId, pNewConsumer->updateType, pOldConsumer->subscribeTime, pOldConsumer->upTime);
taosWLockLatch(&pOldConsumer->lock);
if (pNewConsumer->updateType == CONSUMER_UPDATE__REBALANCE) {
TSWAP(pOldConsumer->rebNewTopics, pNewConsumer->rebNewTopics);
TSWAP(pOldConsumer->rebRemovedTopics, pNewConsumer->rebRemovedTopics);
TSWAP(pOldConsumer->assignedTopics, pNewConsumer->assignedTopics);
pOldConsumer->subscribeTime = pNewConsumer->upTime;
pOldConsumer->status = MQ_CONSUMER_STATUS_REBALANCE;
} else if (pNewConsumer->updateType == CONSUMER_UPDATE__LOST) {
int32_t sz = taosArrayGetSize(pOldConsumer->currentTopics);
for (int32_t i = 0; i < sz; i++) {
char *topic = taosStrdup(taosArrayGetP(pOldConsumer->currentTopics, i));
taosArrayPush(pOldConsumer->rebRemovedTopics, &topic);
}
pOldConsumer->rebalanceTime = pNewConsumer->upTime;
int32_t prevStatus = pOldConsumer->status;
pOldConsumer->status = MQ_CONSUMER_STATUS__LOST;
mDebug("consumer:0x%" PRIx64 " state %s -> %s, reb-time:%" PRId64 ", reb-removed-topics:%d",
pOldConsumer->consumerId, mndConsumerStatusName(prevStatus), mndConsumerStatusName(pOldConsumer->status),
pOldConsumer->rebalanceTime, (int)taosArrayGetSize(pOldConsumer->rebRemovedTopics));
} else if (pNewConsumer->updateType == CONSUMER_UPDATE__RECOVER) {
int32_t sz = taosArrayGetSize(pOldConsumer->assignedTopics);
for (int32_t i = 0; i < sz; i++) {
char *topic = taosStrdup(taosArrayGetP(pOldConsumer->assignedTopics, i));
taosArrayPush(pOldConsumer->rebNewTopics, &topic);
}
pOldConsumer->rebalanceTime = pNewConsumer->upTime;
pOldConsumer->status = MQ_CONSUMER_STATUS_REBALANCE;
} else if (pNewConsumer->updateType == CONSUMER_UPDATE__TOUCH) {
atomic_add_fetch_32(&pOldConsumer->epoch, 1);
pOldConsumer->rebalanceTime = pNewConsumer->upTime;
} else if (pNewConsumer->updateType == CONSUMER_UPDATE__ADD) {
char *pNewTopic = taosStrdup(taosArrayGetP(pNewConsumer->rebNewTopics, 0));
// check if exist in current topic
removeFromNewTopicList(pOldConsumer, pNewTopic);
// add to current topic
bool existing = existInCurrentTopicList(pOldConsumer, pNewTopic);
if (existing) {
taosMemoryFree(pNewTopic);
} else { // added into current topic list
taosArrayPush(pOldConsumer->currentTopics, &pNewTopic);
taosArraySort(pOldConsumer->currentTopics, taosArrayCompareString);
}
// set status
int32_t status = pOldConsumer->status;
updateConsumerStatus(pOldConsumer);
// the re-balance is triggered when the new consumer is launched.
pOldConsumer->rebalanceTime = pNewConsumer->upTime;
atomic_add_fetch_32(&pOldConsumer->epoch, 1);
mDebug("consumer:0x%" PRIx64 " state (%d)%s -> (%d)%s, new epoch:%d, reb-time:%" PRId64
", current topics:%d, newTopics:%d, removeTopics:%d",
pOldConsumer->consumerId, status, mndConsumerStatusName(status), pOldConsumer->status,
mndConsumerStatusName(pOldConsumer->status), pOldConsumer->epoch, pOldConsumer->rebalanceTime,
(int)taosArrayGetSize(pOldConsumer->currentTopics), (int)taosArrayGetSize(pOldConsumer->rebNewTopics),
(int)taosArrayGetSize(pOldConsumer->rebRemovedTopics));
} else if (pNewConsumer->updateType == CONSUMER_UPDATE__REMOVE) {
char *removedTopic = taosArrayGetP(pNewConsumer->rebRemovedTopics, 0);
// remove from removed topic
removeFromRemoveTopicList(pOldConsumer, removedTopic);
// remove from current topic
removeFromCurrentTopicList(pOldConsumer, removedTopic);
// set status
int32_t status = pOldConsumer->status;
updateConsumerStatus(pOldConsumer);
pOldConsumer->rebalanceTime = pNewConsumer->upTime;
atomic_add_fetch_32(&pOldConsumer->epoch, 1);
mDebug("consumer:0x%" PRIx64 " state (%d)%s -> (%d)%s, new epoch:%d, reb-time:%" PRId64
", current topics:%d, newTopics:%d, removeTopics:%d",
pOldConsumer->consumerId, status, mndConsumerStatusName(status), pOldConsumer->status,
mndConsumerStatusName(pOldConsumer->status), pOldConsumer->epoch, pOldConsumer->rebalanceTime,
(int)taosArrayGetSize(pOldConsumer->currentTopics), (int)taosArrayGetSize(pOldConsumer->rebNewTopics),
(int)taosArrayGetSize(pOldConsumer->rebRemovedTopics));
}
taosWUnLockLatch(&pOldConsumer->lock);
return 0;
}
SMqConsumerObj *mndAcquireConsumer(SMnode *pMnode, int64_t consumerId) {
SSdb *pSdb = pMnode->pSdb;
SMqConsumerObj *pConsumer = sdbAcquire(pSdb, SDB_CONSUMER, &consumerId);
if (pConsumer == NULL) {
terrno = TSDB_CODE_MND_CONSUMER_NOT_EXIST;
}
return pConsumer;
}
void mndReleaseConsumer(SMnode *pMnode, SMqConsumerObj *pConsumer) {
SSdb *pSdb = pMnode->pSdb;
sdbRelease(pSdb, pConsumer);
}
static int32_t mndRetrieveConsumer(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBlock, int32_t rowsCapacity) {
SMnode *pMnode = pReq->info.node;
SSdb *pSdb = pMnode->pSdb;
int32_t numOfRows = 0;
SMqConsumerObj *pConsumer = NULL;
while (numOfRows < rowsCapacity) {
pShow->pIter = sdbFetch(pSdb, SDB_CONSUMER, pShow->pIter, (void **)&pConsumer);
if (pShow->pIter == NULL) {
break;
}
if (taosArrayGetSize(pConsumer->assignedTopics) == 0) {
mDebug("showing consumer:0x%" PRIx64 " no assigned topic, skip", pConsumer->consumerId);
sdbRelease(pSdb, pConsumer);
continue;
}
taosRLockLatch(&pConsumer->lock);
mDebug("showing consumer:0x%" PRIx64, pConsumer->consumerId);
int32_t topicSz = taosArrayGetSize(pConsumer->assignedTopics);
bool hasTopic = true;
if (topicSz == 0) {
hasTopic = false;
topicSz = 1;
}
if (numOfRows + topicSz > rowsCapacity) {
blockDataEnsureCapacity(pBlock, numOfRows + topicSz);
}
for (int32_t i = 0; i < topicSz; i++) {
SColumnInfoData *pColInfo;
int32_t cols = 0;
// consumer id
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->consumerId, false);
// consumer group
char cgroup[TSDB_CGROUP_LEN + VARSTR_HEADER_SIZE] = {0};
STR_TO_VARSTR(cgroup, pConsumer->cgroup);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)cgroup, false);
// client id
char clientId[256 + VARSTR_HEADER_SIZE] = {0};
STR_TO_VARSTR(clientId, pConsumer->clientId);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)clientId, false);
// status
char status[20 + VARSTR_HEADER_SIZE] = {0};
const char *pStatusName = mndConsumerStatusName(pConsumer->status);
STR_TO_VARSTR(status, pStatusName);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)status, false);
// one subscribed topic
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
if (hasTopic) {
char topic[TSDB_TOPIC_FNAME_LEN + VARSTR_HEADER_SIZE] = {0};
const char *topicName = mndTopicGetShowName(taosArrayGetP(pConsumer->assignedTopics, i));
STR_TO_VARSTR(topic, topicName);
colDataSetVal(pColInfo, numOfRows, (const char *)topic, false);
} else {
colDataSetVal(pColInfo, numOfRows, NULL, true);
}
// end point
/*pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);*/
/*colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->ep, true);*/
// up time
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->upTime, false);
// subscribe time
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->subscribeTime, false);
// rebalance time
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->rebalanceTime, pConsumer->rebalanceTime == 0);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->withTbName, false);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->useSnapshot, false);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->autoCommit, false);
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)&pConsumer->autoCommitInterval, false);
char buf[TSDB_OFFSET_LEN + VARSTR_HEADER_SIZE] = {0};
STqOffsetVal pVal = {.type = pConsumer->resetOffsetCfg};
tFormatOffset(varDataVal(buf), TSDB_OFFSET_LEN, &pVal);
varDataSetLen(buf, strlen(varDataVal(buf)));
pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
colDataSetVal(pColInfo, numOfRows, (const char *)buf, false);
numOfRows++;
}
taosRUnLockLatch(&pConsumer->lock);
sdbRelease(pSdb, pConsumer);
pBlock->info.rows = numOfRows;
}
pShow->numOfRows += numOfRows;
return numOfRows;
}
static void mndCancelGetNextConsumer(SMnode *pMnode, void *pIter) {
SSdb *pSdb = pMnode->pSdb;
sdbCancelFetch(pSdb, pIter);
}
static const char *mndConsumerStatusName(int status) {
switch (status) {
case MQ_CONSUMER_STATUS__READY:
return "ready";
case MQ_CONSUMER_STATUS__LOST:
case MQ_CONSUMER_STATUS__LOST_REBD:
return "lost";
case MQ_CONSUMER_STATUS_REBALANCE:
return "rebalancing";
default:
return "unknown";
}
}
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