/// <summary>
/// Writes a list of measurements to the InfluxDB database
/// </summary>
/// <param name="listOfMeasurements">The list of measurements to write. Each measurement must have at least one field specified</param>
/// <param name="retention">The specific retention policy name to write to.</param>
/// <returns>An awaitable Task containing the HttpResponseMessage returned from the InfluxDB server</returns>
async public Task <HttpResponseMessage> Write(List <Measurement> listOfMeasurements, String retention = "")
{
// The default response message:
HttpResponseMessage retval = new HttpResponseMessage(HttpStatusCode.InternalServerError);
// Create our url to post data to
string url = string.Format("{0}/write?db={1}", _baseUrl, _database);
if (retention.Length > 0)
{
url += string.Format("&rp={0}", retention);
}
// Our string to build:
StringBuilder sb = new StringBuilder();
foreach (var m in listOfMeasurements)
{
// Make sure the measurement has at least one field:
if (!(m.BooleanFields.Any() ||
m.FloatFields.Any() ||
m.IntegerFields.Any() ||
m.StringFields.Any()))
{
string error = string.Format("Measurement '{0}' needs at least one field value", m.Name);
Trace.TraceError(error);
LogError(new ArgumentException(error), "Measurement '{0}' needs at least one field value", m.Name);
}
sb.AppendFormat("{0}\n", LineProtocol.Format(m));
}
// If we had some measurements...
if (listOfMeasurements.Any())
{
// Remove the last trailing newline
sb.Remove(sb.Length - 1, 1);
}
// Create our data to post:
HttpContent content = new StringContent(sb.ToString());
try {
// Make an async call to get the response
using (HttpClient client = new HttpClient()) {
if (CredentialsHaveBeenSet())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", GetHttpBasicAuthCredentials());
}
retval = await client.PostAsync(url, content);
}
} catch (Exception ex) {
Trace.TraceError("Write (list) {0} caused an exception: {1}", url, ex.Message);
LogError(ex, "Write (list) {0} caused an exception: {1}", url, ex.Message);
}
return(retval);
}
/// <summary>
/// Write a measurement to the InfluxDB database
/// </summary>
/// <param name="m">The measurement to write. It must have at least one field specified</param>
/// <returns>An awaitable Task containing the HttpResponseMessage returned from the InfluxDB server</returns>
async public Task <HttpResponseMessage> Write(Measurement m)
{
// The default response message:
HttpResponseMessage retval = new HttpResponseMessage(HttpStatusCode.InternalServerError);
// Make sure the measurement has at least one field:
if (!(m.BooleanFields.Any() ||
m.FloatFields.Any() ||
m.IntegerFields.Any() ||
m.StringFields.Any()))
{
string error = string.Format("Measurement '{0}' needs at least one field value", m.Name);
Trace.TraceError(error);
LogError(new ArgumentException(error), error);
}
// Create our url to post data to
string url = string.Format("{0}/write?db={1}", _baseUrl, _database);
// Create our data to post:
HttpContent content = new StringContent(LineProtocol.Format(m));
try
{
// Make an async call to get the response
using (HttpClient client = new HttpClient())
{
if (CredentialsHaveBeenSet())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", GetHttpBasicAuthCredentials());
}
retval = await client.PostAsync(url, content);
}
}
catch (Exception ex)
{
Trace.TraceError("Write {0} caused an exception: {1}", url, ex.Message);
LogError(ex, "Write {0} caused an exception: {1}", url, ex.Message);
}
return(retval);
}