/// <summary>
/// HttpEventCollectorTraceListener c-or.
/// </summary>
/// <param name="uri">Splunk server uri, for example https://localhost:8088.</param>
/// <param name="token">HTTP event collector authorization token.</param>
/// <param name="metadata">Logger metadata.</param>
/// <param name="sendMode">Send mode of the events.</param>
/// <param name="batchInterval">Batch interval in milliseconds.</param>
/// <param name="batchSizeBytes">Batch max size.</param>
/// <param name="batchSizeCount">MNax number of individual events in batch.</param>
/// <param name="middleware">
/// HTTP client middleware. This allows to plug an HttpClient handler that
/// intercepts logging HTTP traffic.
/// </param>
public HttpEventCollectorTraceListener(
Uri uri, string token,
HttpEventCollectorEventInfo.Metadata metadata = null,
HttpEventCollectorSender.SendMode sendMode = HttpEventCollectorSender.SendMode.Sequential,
int batchInterval = HttpEventCollectorSender.DefaultBatchInterval,
int batchSizeBytes = HttpEventCollectorSender.DefaultBatchSize,
int batchSizeCount = HttpEventCollectorSender.DefaultBatchCount,
HttpEventCollectorSender.HttpEventCollectorMiddleware middleware = null,
HttpEventCollectorSender.HttpEventCollectorFormatter formatter = null)
{
this.formatter = formatter;
sender = new HttpEventCollectorSender(
uri, token, metadata,
sendMode,
batchInterval, batchSizeBytes, batchSizeCount,
middleware,
formatter);
}
private TraceSource TraceCustomFormatter(
RequestHandler handler,
HttpEventCollectorSender.HttpEventCollectorFormatter formatter,
HttpEventCollectorSender.HttpEventCollectorMiddleware middleware)
{
var trace = new TraceSource("HttpEventCollectorLogger");
trace.Switch.Level = SourceLevels.All;
trace.Listeners.Add(
new HttpEventCollectorTraceListener(
uri: uri,
token: token,
middleware: middleware,
formatter: formatter,
sendMode: HttpEventCollectorSender.SendMode.Parallel)
);
return(trace);
}
public void ActivateOptions(HttpEventCollectorSender.HttpEventCollectorFormatter formatter)
{
_hecSender = new HttpEventCollectorSender(
new Uri(ServerUrl), // Splunk HEC URL
Token, // Splunk HEC token *GUID*
new HttpEventCollectorEventInfo.Metadata(null, null, SourceType, GetMachineName()), // Metadata
HttpEventCollectorSender.SendMode.Sequential, // Sequential sending to keep message in order
0, // BatchInterval - Set to 0 to disable
0, // BatchSizeBytes - Set to 0 to disable
0, // BatchSizeCount - Set to 0 to disable
new HttpEventCollectorResendMiddleware(RetriesOnError).Plugin, // Resend Middleware with retry
formatter // Use a custom formatter before sending
);
// throw error on send failure
_hecSender.OnError += exception =>
{
throw new Exception($"SplunkHttpEventCollector failed to send log event to Splunk server '{new Uri(ServerUrl).Authority}' using token '{Token}'. Exception: {exception}");
};
}
