// This updates routing table when receiving a message.
// if corresponding bucket for remote peer is not full, just adds remote peer.
// otherwise check whether if the least recently used (LRU) peer
// is alive to determine evict LRU peer or discard remote peer.
private async Task UpdateAsync(
Peer rawPeer,
CancellationToken cancellationToken = default(CancellationToken))
{
if (rawPeer is null)
{
throw new ArgumentNullException(nameof(rawPeer));
}
if (!(rawPeer is BoundPeer peer) || rawPeer.AppProtocolVersion != _appProtocolVersion)
{
// Don't update peer without endpoint or with different appProtocolVersion.
return;
}
if (cancellationToken.IsCancellationRequested)
{
throw new TaskCanceledException();
}
bool contains = _routing.Contains(peer);
BoundPeer evictionCandidate = await _routing.AddPeerAsync(peer);
if (evictionCandidate is null)
{
// added successfully since there was empty space in the bucket
if (!contains)
{
_routing.BucketOf(peer).ReplacementCache.Remove(peer);
_logger.Debug($"Added [{peer.Address.ToHex()}] to table");
}
}
else
{
_logger.Verbose(
"Need to evict {Candidate}; trying...",
evictionCandidate);
try
{
if (!_routing.BucketOf(peer).ReplacementCache.Contains(peer))
{
_routing.BucketOf(peer).ReplacementCache.Add(peer);
}
await PingAsync(
evictionCandidate,
_requestTimeout,
cancellationToken);
}
catch (TimeoutException)
{
await RemovePeerAsync(evictionCandidate);
_logger.Verbose(
"Peer ({Candidate}) has been evicted.",
evictionCandidate);
}
}
}
// This updates routing table when receiving a message.
// if corresponding bucket for remote peer is not full, just adds remote peer.
// otherwise check whether if the least recently used (LRU) peer
// is alive to determine evict LRU peer or discard remote peer.
private async Task UpdateAsync(
Peer rawPeer,
CancellationToken cancellationToken = default(CancellationToken))
{
if (rawPeer is null)
{
throw new ArgumentNullException(nameof(rawPeer));
}
if (!(rawPeer is BoundPeer peer) || rawPeer.AppProtocolVersion != _appProtocolVersion)
{
// Don't update peer without endpoint or with different appProtocolVersion.
return;
}
if (cancellationToken.IsCancellationRequested)
{
throw new TaskCanceledException();
}
BoundPeer evictionCandidate = await _routing.AddPeerAsync(peer);
if (!(evictionCandidate is null))
{
_logger.Verbose(
"Need to evict {Candidate}; trying...",
evictionCandidate);
try
{
await ValidateAsync(
evictionCandidate,
_requestTimeout,
cancellationToken);
}
catch (TimeoutException)
{
_logger.Verbose(
"Peer ({Candidate}) has been evicted.",
evictionCandidate);
}
}
}
// This updates routing table when receiving a message.
// if corresponding bucket for remote peer is not full, just adds remote peer.
// otherwise check whether if the least recently used (LRU) peer
// is alive to determine evict LRU peer or discard remote peer.
private async Task UpdateAsync(
Peer rawPeer,
CancellationToken cancellationToken = default(CancellationToken))
{
if (rawPeer is null)
{
throw new ArgumentNullException(nameof(rawPeer));
}
if (!(rawPeer is BoundPeer peer) || rawPeer.AppProtocolVersion != _appProtocolVersion)
{
// Don't update peer without endpoint or with different appProtocolVersion.
return;
}
if (cancellationToken.IsCancellationRequested)
{
throw new TaskCanceledException();
}
await _routing.AddPeerAsync(peer);
}