/// <summary>
/// 解析模型对应的Influx表名（Measurement）
/// </summary>
/// <param name="modelType"></param>
/// <returns></returns>
public static string GetMeasurement(Type modelType)
{
InfluxModelAttribute modelAttr = modelType.GetCustomAttribute <InfluxModelAttribute>();
string measurement = modelAttr?.Measurement;
return(measurement);
}
public static InfluxDatapoint<InfluxValueField> Convert<T>(T model)
{
if (model == null)
{
_logger.LogError($"警告！Model不能为null");
return null;
}
Type t = model.GetType();
//解析模型对应的Influx表名（Measurement）
string measurement = GetMeasurement(t);
if (string.IsNullOrWhiteSpace(measurement))
{
_logger.LogError($"警告！Model缺少 InfluxModelAttribute.Measurement");
return null;
}
//解析模型对应的Influx字段
InfluxDatapoint<InfluxValueField> influxValue = new InfluxDatapoint<InfluxValueField>();
influxValue.MeasurementName = measurement;
FieldInfo[] fields = t.GetFields();
PropertyInfo[] props = t.GetProperties();
List<MemberInfo> members = new List<MemberInfo>();
members.AddRange(fields);
members.AddRange(props);
foreach (MemberInfo member in members)
{
InfluxModelAttribute attr = member.GetCustomAttribute<InfluxModelAttribute>();
if (attr == null || attr.FieldType == InfluxFieldType.Ignore)
{
continue;
}
//Console.WriteLine($"Name: {field.Name}, Data: {field.GetValue(model)}, Type: {attr.FieldType}");
string name = member.Name;
object value = null;
if (member is FieldInfo fInfo)
{
value = fInfo.GetValue(model);
}
else if (member is PropertyInfo pInfo)
{
value = pInfo.GetValue(model);
}
switch (attr.FieldType)
{
case InfluxFieldType.Value:
{
IComparable val = value as IComparable;
if (val == null)
{
//收到的字段里可能有null，忽略值为null的字段
//_logger.LogError($"警告！Model: {model.GetType().Name}, Field: {name} 转换为Influx数据格式失败");
continue;
}
influxValue.Fields.Add(name, new InfluxValueField(val));
}
break;
case InfluxFieldType.Tag:
{
string tag = value as string;
if (tag == null) tag = value.ToString();
influxValue.Tags.Add(name, tag);
}
break;
case InfluxFieldType.Timestamp:
{
DateTime utcTime = default(DateTime);
bool convertSuccess = false;
if (value is DateTime dtVal)
{
utcTime = DateTimeConverter.ToUtcDateTime(dtVal);
convertSuccess = true;
}
else if (value is long lgVal)
{
utcTime = DateTimeConverter.ToUtcDateTime(lgVal);
convertSuccess = true;
}
if (convertSuccess)
{
influxValue.UtcTimestamp = utcTime;
}
else
{
_logger.LogError($"警告！Model: {t.Name}, Field: {name} 转换为UTC时间失败");
continue;
}
}
break;
case InfluxFieldType.Ignore:
break;
default:
break;
}
}
return influxValue;
}
