for (int i = 0; i < numMetrics; i++) {
String tenantId = in.readString();
String metricName = in.readString();
DataType type = new DataType(in.readString());
long collectionTime = in.readRawVarint64();
int ttlSecs = in.readRawVarint32();
String units = in.readString();
Object value = null;
if (type.equals(DataType.BOOLEAN))
value = in.readBool();