private async Task SendHeartbeatAsync(Context context)
{
StructResult <int> sessionResult = await _sessionState.GetIdAsync();
if (!sessionResult.Succeeded)
{
// We do not even attempt to send a heartbeat if we can't get a session ID.
return;
}
int sessionId = sessionResult.Data;
try
{
HeartbeatResponse response = await _client.HeartbeatAsync(new HeartbeatRequest { Header = new RequestHeader(context.Id, sessionId) });
// Check for null header here as a workaround to a known service bug, which returns null headers on successful heartbeats.
if (response?.Header != null && !response.Header.Succeeded)
{
_tracer.Warning(
context,
$"Heartbeat failed: ErrorMessage=[{response.Header.ErrorMessage}] Diagnostics=[{response.Header.Diagnostics}]");
// Nor do we attempt to reset a session ID based on a failed heartbeat.
}
}
catch (Exception ex)
{
string message = (ex is RpcException rpcEx) && (rpcEx.Status.StatusCode == StatusCode.Unavailable)
? "Heartbeat failed to detect running service."
: $"Heartbeat failed: [{ex}]";
_tracer.Debug(context, message);
}
}
/// <inheritdoc />
protected override AsyncUnaryCall <HeartbeatResponse> HeartbeatAsync(HeartbeatRequest heartbeatRequest)
{
return(_client.HeartbeatAsync(heartbeatRequest));
}
/// <inheritdoc />
protected override AsyncUnaryCall <HeartbeatResponse> HeartbeatAsync(HeartbeatRequest heartbeatRequest, CancellationToken token)
{
return(Client.HeartbeatAsync(heartbeatRequest, cancellationToken: token));
}
