void fillWriterVectors(const std::deque<BSONObj>& ops,
std::vector<std::vector<BSONObj>>* writerVectors) {
for (std::deque<BSONObj>::const_iterator it = ops.begin(); it != ops.end(); ++it) {
const BSONElement e = it->getField("ns");
verify(e.type() == String);
const char* ns = e.valuestr();
int len = e.valuestrsize();
uint32_t hash = 0;
MurmurHash3_x86_32(ns, len, 0, &hash);
const char* opType = it->getField("op").valuestrsafe();
if (getGlobalServiceContext()->getGlobalStorageEngine()->supportsDocLocking() &&
isCrudOpType(opType)) {
BSONElement id;
switch (opType[0]) {
case 'u':
id = it->getField("o2").Obj()["_id"];
break;
case 'd':
case 'i':
id = it->getField("o").Obj()["_id"];
break;
}
const size_t idHash = BSONElement::Hasher()(id);
MurmurHash3_x86_32(&idHash, sizeof(idHash), hash, &hash);
}
(*writerVectors)[hash % writerVectors->size()].push_back(*it);
}
}
BSONElement OplogEntry::getIdElement() const {
invariant(isCrudOpType());
if (getOpType() == OpTypeEnum::kUpdate) {
// We cannot use getOperationToApply() here because the BSONObj will go out out of scope
// after we return the BSONElement.
return getObject2()->getField("_id");
} else {
return getObject()["_id"];
}
}
BSONElement OplogEntry::getIdElement() const {
invariant(isCrudOpType());
switch (opType[0]) {
case 'u':
return o2.Obj()["_id"];
case 'd':
case 'i':
return o.Obj()["_id"];
}
MONGO_UNREACHABLE;
}
bool OplogEntry::isCrudOpType() const {
return isCrudOpType(getOpType());
}
