/// <summary>
/// Initializes a new instance of the <see cref="Application"/> class.
/// </summary>
public Application(CancellationToken cancellationToken)
{
_cancellationToken = cancellationToken;
_consoleLog = new ConsoleLog(Severity.Warning);
_logger = new Logger(true, _consoleLog);
_fileSystem = new PassThroughFileSystem(_logger);
_tracer = new Tracer(nameof(Application));
var kustoConnectionString = Environment.GetEnvironmentVariable(KustoConnectionStringEnvVarName);
_kustoUploader = string.IsNullOrWhiteSpace(kustoConnectionString)
? null
: new KustoUploader
(
kustoConnectionString,
database: KustoDatabase,
table: KustoTable,
deleteFilesOnSuccess: true,
checkForIngestionErrors: true,
log: _consoleLog
);
}
private void EnableRemoteTelemetryIfNeeded(string logFilePath)
{
if (!_enableRemoteTelemetry)
{
return;
}
var kustoConnectionString = Environment.GetEnvironmentVariable(KustoConnectionStringEnvVarName);
if (string.IsNullOrWhiteSpace(kustoConnectionString))
{
_logger.Warning
(
"Remote telemetry flag is enabled but no Kusto connection string was found in environment variable '{0}'",
KustoConnectionStringEnvVarName
);
return;
}
_csvFileLog = new CsvFileLog
(
logFilePath: logFilePath + TmpCsvLogFileExt,
serviceName: ServiceName,
schema: KustoTableCsvSchema,
renderConstColums: false,
severity: _fileLogSeverity,
maxFileSize: _csvLogMaxFileSize
);
var indexedColumns = _csvFileLog.FileSchema.Select((col, idx) => new CsvColumnMapping {
ColumnName = col.ToString(), Ordinal = idx
});
var constColumns = _csvFileLog.ConstSchema.Select(col => new CsvColumnMapping {
ColumnName = col.ToString(), ConstValue = _csvFileLog.RenderConstColumn(col)
});
var csvMapping = indexedColumns.Concat(constColumns).ToArray();
var csvMappingStr = string.Join("", csvMapping.Select(col => $"{Environment.NewLine} Name: '{col.ColumnName}', ConstValue: '{col.ConstValue}', Ordinal: {col.Ordinal}"));
_logger.Always("Using csv mapping:{0}", csvMappingStr);
_kustoUploader = new KustoUploader
(
kustoConnectionString,
database: KustoDatabase,
table: KustoTable,
csvMapping: csvMapping,
deleteFilesOnSuccess: true,
checkForIngestionErrors: true,
log: _consoleLog
);
// Every time a log file written to disk and closed, we rename it and upload it to Kusto.
// The last log file will be produced when _csvFileLog is disposed, so _kustUploader better
// not be disposed before _csvFileLog.
_csvFileLog.OnLogFileProduced += (path) =>
{
string newPath = Path.ChangeExtension(path, CsvLogFileExt);
File.Move(path, newPath);
_kustoUploader.PostFileForUpload(newPath, _csvFileLog.BuildId);
};
_logger.AddLog(_csvFileLog);
_logger.Always("Remote telemetry enabled");
}
