/// <summary>
/// Gets the request ID for logging.
/// </summary>
/// <param name="responseHeaders">The response headers.</param>
/// <param name="response">The response.</param>
/// <param name="exception">The exception, if available.</param>
/// <returns>The request ID.</returns>
public string GetRequestId(Metadata responseHeaders, object response,
RpcException exception)
{
string requestId = new AdsResponseMetadata(responseHeaders).RequestId;
// For streaming calls, the trailing response headers are returned only after
// the entire stream is read, whereas we write summary logs each time we retrieve
// a response object from the stream. As a result, the requestId in summary logs
// appear blank in all except the last entry. As a fix, we read the request Id
// from the stream response object as a fallback.
if (string.IsNullOrEmpty(requestId))
{
IResponseMetadata responseMetadata = response as IResponseMetadata;
if (responseMetadata != null)
{
requestId = responseMetadata.RequestId;
}
}
if (string.IsNullOrEmpty(requestId))
{
AdsBaseException adsException = exception as AdsBaseException;
if (adsException != null)
{
requestId = adsException.RequestId;
}
}
return(requestId);
}
/// <summary>
/// Parses the task exception.
/// </summary>
/// <param name="e">The <see cref="AggregateException"/> to parse.</param>
/// <returns>The parsed <see cref="AdsBaseException"/> if parsing is successful;
/// The underlying <see cref="RpcException" /> if the exception cannot be parsed as a
/// AdsBaseException.</returns>
/// <remarks><code>AggregateException</code> is very close to a catch-all exception for
/// Tasks. While all the situations that we know of involves this exception being thrown
/// by an underlying <code>RpcException</code>, theoretically this method may return a
/// null object, if the <code>AggregateException</code> is not caused by an
/// <code>RpcException</code>. That would typically indicate an underlying issue with
/// the code.</remarks>
internal static RpcException ParseTaskException <TResponse>(AggregateException e)
{
RpcException rpcException = ExtractRpcException(e);
AdsBaseException adsException = ParseRpcException <TResponse>(rpcException);
return((adsException == null) ? rpcException : adsException);
}
