Status bsonExtractOIDFieldWithDefault(const BSONObj& object,
StringData fieldName,
const OID& defaultValue,
OID* out) {
Status status = bsonExtractOIDField(object, fieldName, out);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
} else if (!status.isOK()) {
return status;
}
return Status::OK();
}
StatusWith<ShardIdentityType> ShardIdentityType::fromBSON(const BSONObj& source) {
if (!source.hasField("_id")) {
return {ErrorCodes::NoSuchKey,
str::stream() << "missing _id field for shardIdentity document"};
}
ShardIdentityType shardIdentity;
{
std::string docId;
Status status = bsonExtractStringField(source, "_id", &docId);
if (!status.isOK()) {
return status;
}
if (docId != IdName) {
return {ErrorCodes::FailedToParse,
str::stream() << "got _id: " << docId << " instead of " << IdName};
}
}
{
std::string connString;
Status status = bsonExtractStringField(source, configsvrConnString(), &connString);
if (!status.isOK()) {
return status;
}
try {
// Note: ConnectionString::parse can uassert from HostAndPort constructor.
auto parsedConfigConnStrStatus = ConnectionString::parse(connString);
if (!parsedConfigConnStrStatus.isOK()) {
return parsedConfigConnStrStatus.getStatus();
}
auto configSvrConnStr = parsedConfigConnStrStatus.getValue();
if (configSvrConnStr.type() != ConnectionString::SET) {
return Status(ErrorCodes::UnsupportedFormat,
str::stream()
<< "config server connection string can only be replica sets: "
<< configSvrConnStr.toString());
}
shardIdentity.setConfigsvrConnString(std::move(configSvrConnStr));
} catch (const UserException& parseException) {
return parseException.toStatus();
}
}
{
std::string name;
Status status = bsonExtractStringField(source, shardName(), &name);
if (!status.isOK()) {
return status;
}
shardIdentity.setShardName(name);
}
{
OID oid;
Status status = bsonExtractOIDField(source, clusterId(), &oid);
if (!status.isOK()) {
return status;
}
shardIdentity.setClusterId(oid);
}
return shardIdentity;
}