StatusWith<ShardingMetadata> ShardingMetadata::readFromMetadata(const BSONObj& metadataObj) {
BSONElement smElem;
auto smExtractStatus =
bsonExtractTypedField(metadataObj, kGLEStatsFieldName, mongo::Object, &smElem);
if (!smExtractStatus.isOK()) {
return smExtractStatus;
}
if (smElem.embeddedObject().nFields() != 2) {
return Status(ErrorCodes::InvalidOptions,
str::stream() << "The $gleStats object can only have 2 fields, but got "
<< smElem.embeddedObject().toString());
}
BSONElement lastOpTimeElem;
auto lastOpTimeExtractStatus = bsonExtractTypedField(smElem.embeddedObject(),
kGLEStatsLastOpTimeFieldName,
mongo::bsonTimestamp,
&lastOpTimeElem);
if (!lastOpTimeExtractStatus.isOK()) {
return lastOpTimeExtractStatus;
}
BSONElement lastElectionIdElem;
auto lastElectionIdExtractStatus = bsonExtractTypedField(
smElem.embeddedObject(), kGLEStatsElectionIdFieldName, mongo::jstOID, &lastElectionIdElem);
if (!lastElectionIdExtractStatus.isOK()) {
return lastElectionIdExtractStatus;
}
return ShardingMetadata(lastOpTimeElem.timestamp(), lastElectionIdElem.OID());
}
StatusWith<ShardingMetadata> ShardingMetadata::readFromMetadata(const BSONObj& metadataObj) {
BSONElement smElem;
auto smExtractStatus =
bsonExtractTypedField(metadataObj, kGLEStatsFieldName, mongol::Object, &smElem);
if (!smExtractStatus.isOK()) {
return smExtractStatus;
}
if (smElem.embeddedObject().nFields() != 2) {
return Status(ErrorCodes::InvalidOptions,
str::stream() << "The $gleStats object can only have 2 fields, but got "
<< smElem.embeddedObject().toString());
}
repl::OpTime opTime;
const BSONElement opTimeElement = smElem.embeddedObject()[kGLEStatsLastOpTimeFieldName];
if (opTimeElement.eoo()) {
return Status(ErrorCodes::NoSuchKey, "lastOpTime field missing");
} else if (opTimeElement.type() == bsonTimestamp) {
opTime = repl::OpTime(opTimeElement.timestamp(), repl::OpTime::kUninitializedTerm);
} else if (opTimeElement.type() == Date) {
opTime = repl::OpTime(Timestamp(opTimeElement.date()), repl::OpTime::kUninitializedTerm);
} else if (opTimeElement.type() == Object) {
Status status =
bsonExtractOpTimeField(smElem.embeddedObject(), kGLEStatsLastOpTimeFieldName, &opTime);
if (!status.isOK()) {
return status;
}
} else {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "Expected \"" << kGLEStatsLastOpTimeFieldName
<< "\" field in response to replSetHeartbeat "
"command to have type Date or Timestamp, but found type "
<< typeName(opTimeElement.type()));
}
BSONElement lastElectionIdElem;
auto lastElectionIdExtractStatus = bsonExtractTypedField(
smElem.embeddedObject(), kGLEStatsElectionIdFieldName, mongol::jstOID, &lastElectionIdElem);
if (!lastElectionIdExtractStatus.isOK()) {
return lastElectionIdExtractStatus;
}
return ShardingMetadata(opTime, lastElectionIdElem.OID());
}