/// <summary>
/// Validate peer by send <see cref="Ping"/> to <paramref name="peer"/>. If target peer
/// does not responds, remove it from the table.
/// </summary>
/// <param name="peer">A <see cref="BoundPeer"/> to validate.</param>
/// <param name="timeout">Timeout for waiting reply of <see cref="Ping"/>.</param>
/// <param name="cancellationToken">A cancellation token used to propagate notification
/// that this operation should be canceled.</param>
/// <returns>An awaitable task without value.</returns>
/// <exception cref="TimeoutException">
/// Thrown when validation fails in given <paramref name="timeout"/>.
/// </exception>
private async Task ValidateAsync(
BoundPeer peer,
TimeSpan timeout,
CancellationToken cancellationToken = default(CancellationToken))
{
try
{
_logger.Verbose("Start to validate a peer: {Peer}", peer);
DateTimeOffset check = DateTimeOffset.UtcNow;
await PingAsync(peer, timeout, cancellationToken);
_table.Check(peer, check, DateTimeOffset.UtcNow);
}
catch (PingTimeoutException)
{
_logger.Verbose("Peer {Peer} is invalid, removing...", peer);
RemovePeer(peer);
throw new TimeoutException($"Timeout occurred during {nameof(ValidateAsync)}");
}
}
/// <summary>
/// Validate peer by send <see cref="Ping"/> to <paramref name="peer"/>. If target peer
/// does not responds, remove it from the table.
/// </summary>
/// <param name="peer">A <see cref="BoundPeer"/> to validate.</param>
/// <param name="timeout">Timeout for waiting reply of <see cref="Ping"/>.</param>
/// <param name="cancellationToken">A cancellation token used to propagate notification
/// that this operation should be canceled.</param>
/// <returns>An awaitable task without value.</returns>
private async Task ValidateAsync(
BoundPeer peer,
TimeSpan timeout,
CancellationToken cancellationToken = default(CancellationToken))
{
try
{
_logger.Debug("Start to validate a peer: {Peer}", peer);
DateTimeOffset check = DateTimeOffset.UtcNow;
await PingAsync(peer, timeout, cancellationToken);
_routing.Check(peer, check, DateTimeOffset.UtcNow);
}
catch (TimeoutException)
{
_logger.Debug("Peer {Peer} is invalid, removing...", peer);
RemovePeer(peer);
throw;
}
}