public PeerInfo Select(PeerInfo currentPeer, IEnumerable <PeerInfo> peers, INodeStatsManager nodeStatsManager, IBlockTree blockTree)
{
IPeerSelectionStrategy strategy = _priority ? BySpeedSelectionStrategy.Fastest : BySpeedSelectionStrategy.Slowest;
peers = _minNumber == null ? peers : peers.Where(p => p.HeadNumber > _minNumber);
return(strategy.Select(currentPeer, peers, nodeStatsManager, blockTree));
}
public Task <SyncPeerAllocation> BorrowAsync(IPeerSelectionStrategy peerSelectionStrategy, string description = "", int timeoutMilliseconds = 0)
{
SyncPeerAllocation allocation = new SyncPeerAllocation(peerSelectionStrategy);
allocation.AllocateBestPeer(UsefulPeers.Where(p => !p.IsAllocated), new NodeStatsManager(new StatsConfig(), LimboLogs.Instance), SyncPeerTree, description);
return(Task.FromResult(allocation));
}
public async Task <SyncPeerAllocation> BorrowAsync(IPeerSelectionStrategy peerSelectionStrategy, string description = "", int timeoutMilliseconds = 0)
{
int tryCount = 1;
DateTime startTime = DateTime.UtcNow;
SyncPeerAllocation allocation = new SyncPeerAllocation(peerSelectionStrategy);
while (true)
{
lock (_isAllocatedChecks)
{
allocation.AllocateBestPeer(UsefulPeers.Where(p => !p.IsAllocated), _stats, _blockTree, "INIT");
if (allocation.HasPeer)
{
if (peerSelectionStrategy.CanBeReplaced)
{
_replaceableAllocations.TryAdd(allocation, null);
}
return(allocation);
}
}
bool timeoutReached = timeoutMilliseconds == 0 ||
(DateTime.UtcNow - startTime).TotalMilliseconds > timeoutMilliseconds;
if (timeoutReached)
{
return(SyncPeerAllocation.FailedAllocation);
}
int waitTime = 10 * tryCount++;
await _signals.WaitOneAsync(waitTime, CancellationToken.None);
_signals.Reset(); // without this we have no delay
}
}
public SyncPeerAllocation(IPeerSelectionStrategy peerSelectionStrategy)
{
_peerSelectionStrategy = peerSelectionStrategy;
}
public TotalDiffFilter(IPeerSelectionStrategy strategy, UInt256 requiredDifficulty)
{
_strategy = strategy ?? throw new ArgumentNullException(nameof(strategy));
_requiredDifficulty = requiredDifficulty;
}
