/// <inheritdoc/>
public Task <IDiagnosticEventSink> CreateDiagnosticEventSink(IConfiguration configuration)
{
var uri = configuration?.GetValue <Uri>("uri");
var database = configuration?["database"];
if (uri == null)
{
throw new ConfigurationErrorsException("'uri' attribute is required (e.g. http://localhost:8086)");
}
if (string.IsNullOrWhiteSpace(database))
{
throw new ConfigurationErrorsException("'database' attribute is required");
}
var options = new InfluxDBOptions(uri, database)
{
Measurement = configuration["measurement"],
Username = configuration["username"],
Password = configuration["password"]
};
var precision = configuration["precision"];
if (!string.IsNullOrWhiteSpace(precision))
{
options.Precision = InfluxDBPrecision.Parse(precision);
}
var tags = configuration["tags"];
if (!string.IsNullOrWhiteSpace(tags))
{
options.Tags = tags.Split(',')
.Select(tag =>
{
var keyValue = tag.Split('=');
var key = keyValue.FirstOrDefault();
var value = keyValue.Skip(1).FirstOrDefault();
return(new KeyValuePair <string, string>(key, value));
})
.ToDictionary(tag => tag.Key, tag => tag.Value);
}
var sampleRate = default(TimeSpan);
var sampleRateStr = configuration["sampleRate"];
if (!string.IsNullOrWhiteSpace(sampleRateStr))
{
if (!TimeSpan.TryParse(sampleRateStr, out sampleRate))
{
throw new ConfigurationErrorsException("Invalid timespan specified for 'sampleRate'");
}
}
return(Task.FromResult <IDiagnosticEventSink>(new InfluxDBSink(options, sampleRate)));
}
/// <summary>
/// Initializes a new <see cref="InfluxDBSink"/>
/// </summary>
/// <param name="options">Options specifying connection parameters and details governing
/// how points are written to the InfluxDB database</param>
/// <param name="sampleRate">(Optional) The rate at which samples should be taken</param>
public InfluxDBSink(InfluxDBOptions options, TimeSpan sampleRate = default(TimeSpan))
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_measurement = string.IsNullOrWhiteSpace(options.Measurement)
? InfluxDBOptions.DefaultMeasurement
: options.Measurement.Trim();
_precision = options.Precision ?? InfluxDBPrecision.Nanosecond;
_sampleRate = sampleRate <= TimeSpan.Zero
? TimeSpan.FromSeconds(5)
: sampleRate;
var parameters = new Dictionary <string, string>();
parameters["db"] = options.Database;
parameters["u"] = options.Username;
parameters["p"] = options.Password;
parameters["precision"] = _precision.Name;
var queryString = string.Join("&", parameters
.Where(param => !string.IsNullOrWhiteSpace(param.Value))
.Select(param => param.Key + "=" + param.Value));
_client = new HttpClient
{
BaseAddress = new UriBuilder(options.Uri)
{
Path = "write",
Query = queryString
}.Uri
};
var myTags = options.Tags.Any() ? options.Tags : DefaultTags;
var validTags = myTags.Where(tag => !string.IsNullOrWhiteSpace(tag.Key));
_tagSet = string.Join(",", validTags.Select(tag => TagEscape(tag.Key) + "=" + TagEscape(tag.Value)));
}