/// <summary>
/// Add sensor data
/// </summary>
/// <param name="deviceId">Device Id</param>
/// <param name="temperature">Temperature</param>
/// <param name="humidity">Humidity</param>
/// <param name="localTime">Local time</param>
/// <returns></returns>
public bool AddSensorHatData(string deviceId, int temperature, int humidity, DateTime localTime)
{
long ticks = DateTime.UtcNow.Ticks;
var latestEnt = new SensorHatEntity(deviceId, temperature, humidity, localTime, true, ticks);
var oldestEnt = new SensorHatEntity(deviceId, temperature, humidity, localTime, false, ticks);
// EntityGroupTransaction
TableBatchOperation batch = new TableBatchOperation();
batch.InsertOrMerge(latestEnt);
batch.InsertOrMerge(oldestEnt);
try
{
_table.ExecuteBatch(batch);
return(true);
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
return(false);
}
}
/// <summary>
/// Gets the data as per the sorted order
/// </summary>
/// <param name="deviceId">Id of the device</param>
/// <param name="startUTCTime">Start time in UTC</param>
/// <param name="endUTCTime">End time in UTC</param>
/// <param name="latestFirst">Order of the data</param>
/// <returns></returns>
public List <SensorHatModel> GetSensorHatData(string deviceId, DateTime startUTCTime, DateTime endUTCTime, bool latestFirst)
{
if (string.IsNullOrEmpty(deviceId))
{
throw new ArgumentNullException(nameof(deviceId));
}
// ensure that the params are valid
if (startUTCTime < endUTCTime)
{
throw new ArgumentException("Start time should be less than the end time.");
}
// return list
List <SensorHatModel> data = new List <SensorHatModel>();
try
{
// get the start and end row keys
var startRowKey = SensorHatEntity.GenerateRowKey(latestFirst, startUTCTime.Ticks);
var endRowKey = SensorHatEntity.GenerateRowKey(latestFirst, endUTCTime.Ticks);
// build the filter for PartitionKey
var pkFilter = TableQuery.GenerateFilterCondition(nameof(TableEntity.PartitionKey), QueryComparisons.Equal, deviceId);
// filter fr ow keys
var gtEqRowFilter = TableQuery.GenerateFilterCondition(nameof(TableEntity.RowKey), QueryComparisons.GreaterThanOrEqual, startRowKey);
var ltEqRowFilter = TableQuery.GenerateFilterCondition(nameof(TableEntity.RowKey), QueryComparisons.LessThanOrEqual, endRowKey);
// combine the filters
var rowRangeFilter = TableQuery.CombineFilters(gtEqRowFilter, TableOperators.And, ltEqRowFilter);
var filter = TableQuery.CombineFilters(pkFilter, TableOperators.And, rowRangeFilter);
// run the queries
var tableQuery = new TableQuery <SensorHatEntity>().Where(filter);
var results = _table.ExecuteQuery(tableQuery);
//convert entities into models
foreach (var ent in results)
{
var model = new SensorHatModel();
model.DeviceId = ent.PartitionKey;
model.Humidity = ent.Humidity;
model.Temperature = ent.Temperature;
model.TimeStamp = ent.LocalTime;
data.Add(model);
}
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
}
return(data);
}
