private void Work()
{
var txoIn = TxoPack.Create();
var txoOut = TxoPack.Create();
// local array for capturing outpoints from inbox then sorting
var outpoints = new Outpoint[Constants.MaxOutpointsCount];
// array of inbox messages headers
var messageHeaders = new byte[Constants.MaxOutpointsCount][];
// array of inbox messages payloads
// var payloads = new byte[MaxTxoCount][]; // not used in read request
// provide index array for argsort
var argsort = new int[Constants.MaxOutpointsCount];
int txoCount = 0;
while (!_source.Token.IsCancellationRequested)
{
var message = _inbox.Peek();
if (message.Length > 0)
{
// parse current message and add txo to txopack
var outpoint =
Outpoint.CreateNaked(
message.Slice(ClientServerMessage.PayloadStart, Outpoint.KeySizeInBytes));
outpoints[txoCount] = outpoint;
messageHeaders[txoCount] = message.Slice(0, ClientServerMessage.PayloadStart).ToArray();
// payloads[messageCount] = message.Slice(ClientServerMessage.PayloadStart).ToArray();
// not used in read request
argsort[txoCount] = txoCount;
++txoCount;
Debug.Assert(txoCount <= Constants.MaxOutpointsCount,
"MaxTxoCount reached when looping inbox messages.");
_inbox.Next(message.Length);
}
else
{
// current round of inbox message picking is over
Array.Sort(outpoints, argsort, 0, txoCount);
// sort txopack
ref var writer = ref txoIn.GetResetWriter();
// identify identical outpoint, and write querying txopack
ref var previous = ref outpoints[argsort[0]];
writer.Write(in previous, ReadOnlySpan <byte> .Empty);
for (ushort index = 1; index < txoCount; ++index)
{
ref var current = ref outpoints[argsort[index]];
if (previous != current)
{
previous = current;
writer.Write(in previous, ReadOnlySpan <byte> .Empty);
}
}
public void TestIsAncestor()
{
Setup();
var messageAllocation = new Span <byte>(new byte[IsAncestor.SizeInBytes]);
var isAncestorReq = new IsAncestor(1, 5, _3, _1);
// Serialize message to put it into the inbox
MessageSerializers.ClientSerializeIsAncestor(isAncestorReq, messageAllocation);
_inbox.TryWrite(messageAllocation);
_controller.DoWork();
var result = _outbox.Peek();
Assert.Equal(MessageType.AncestorResponse, ClientServerMessage.GetMessageType(result));
Assert.True(ClientServerMessage.TryGetLength(result, out int responseSize));
Assert.Equal(AncestorResponse.SizeInBytes, responseSize);
var response = MessageSerializers.ClientDeserializeAncestorResponse(result);
Assert.Equal(1U, response.RequestId);
Assert.Equal(5U, response.ClientId);
Assert.True(response.Answer);
// get a wrong ancestor
isAncestorReq = new IsAncestor(1, 5, _3, _5);
// Serialize message to put it into the inbox
MessageSerializers.ClientSerializeIsAncestor(isAncestorReq, messageAllocation);
_inbox.TryWrite(messageAllocation);
_controller.DoWork();
_outbox.Next();
result = _outbox.Peek();
var response2 = MessageSerializers.ClientDeserializeAncestorResponse(result);
Assert.Equal(1U, response2.RequestId);
Assert.Equal(5U, response2.ClientId);
Assert.Equal(MessageType.AncestorResponse, response2.ResponseType);
Assert.False(response2.Answer);
}
/// <summary>
/// Return 'true' if at least one request has been processed, 'false' otherwise.
/// </summary>
public bool HandleRequest()
{
if (!_inbox.CanPeek)
{
return(false);
}
var next = _inbox.Peek().Span;
try
{
var message = new Message(next);
var kind = message.Header.MessageKind;
var mask = message.Header.ClientId.Mask;
Span <byte> response;
switch (kind)
{
case MessageKind.OpenBlock:
response = OpenBlock(new OpenBlockRequest(message.Span, mask)).Span;
break;
case MessageKind.GetBlockHandle:
response = GetBlockHandle(new GetBlockHandleRequest(message.Span, mask)).Span;
break;
case MessageKind.CommitBlock:
response = CommitBlock(new CommitBlockRequest(message.Span, mask)).Span;
break;
case MessageKind.GetBlockInfo:
response = GetBlockInfo(new GetBlockInfoRequest(message.Span, mask));
break;
default:
throw new NotSupportedException();
}
while (!_outbox.TryWrite(response))
{
_log?.Log(LogSeverity.Warning, $"ChainController can't write the response to {kind}.");
// Pathological situation, we don't want to overflow the logger.
Thread.Sleep(1000);
}
}
finally
{
_pool.Reset();
_inbox.Next();
}
return(true);
}
private void ReadingMessageFromInbox()
{
// only works if inbox was filled with _bytes first and then _bytesRandom1
PrepareBytesRandom();
_inbox.TryWrite(_bytesRandom1);
Assert.Equal(_bytes, _inbox.Peek().ToArray());
_inbox.Next();
Assert.Equal(_bytesRandom1, _inbox.Peek().ToArray());
}
public void SendResponses()
{
var toSend = _outbox.Peek();
while (toSend.Length != 0)
{
if (_activeConnections.TryGetValue(ClientServerMessage.GetClientId(toSend), out var client))
{
client.TryWrite(toSend);
}
_outbox.Next();
toSend = _outbox.Peek();
}
}
public bool HandleRequest()
{
if (!_inbox.CanPeek)
{
return(false);
}
var next = _inbox.Peek().Span;
try
{
var message = new Message(next);
var mask = message.Header.ClientId.Mask;
var kind = message.Header.MessageKind;
var requestId = message.Header.RequestId;
var clientId = message.Header.ClientId;
if (!_connections.TryGetValue(clientId, out var connection))
{
// Outdated message, drop and move on.
return(true);
}
if (!connection.Connected || kind == MessageKind.CloseConnection)
{
// Client disconnected, drop message and remove connection.
_connections.Remove(clientId);
return(true);
}
if (kind.IsResponse())
{
// Forward responses to their respective 'ConnectionController'.
connection.Send(next);
return(true);
}
if (kind.IsForCoinController())
{
// Multiple coin controllers
Outpoint outpoint;
switch (kind)
{
case MessageKind.GetCoin:
outpoint = new GetCoinRequest(next, mask).Outpoint;
break;
case MessageKind.ProduceCoin:
outpoint = new ProduceCoinRequest(next, mask).Outpoint;
break;
case MessageKind.ConsumeCoin:
outpoint = new ConsumeCoinRequest(next, mask).Outpoint;
break;
case MessageKind.RemoveCoin:
outpoint = new RemoveCoinRequest(next, mask).Outpoint;
break;
default:
throw new NotSupportedException();
}
// Sharding based on the outpoint hash
// Beware: the factor 'BigPrime' is used to avoid accidental factor collision
// between the sharding performed at the dispatch controller level, and the
// sharding performed within the Sozu table.
// PERF: hashing the outpoint is repeated in the CoinController itself
const ulong BigPrime = 1_000_000_007;
var controllerIndex = (int)((_hash.Hash(ref outpoint) % BigPrime)
% (ulong)_coinControllerBoxes.Length);
var written = _coinControllerBoxes[controllerIndex].TryWrite(next);
if (written)
{
OnCoinMessageDispatched[controllerIndex]();
}
else
{
// Coin controller is saturated.
Span <byte> buffer = stackalloc byte[ProtocolErrorResponse.SizeInBytes];
var errorMessage = new ProtocolErrorResponse(
buffer, requestId, clientId, ProtocolErrorStatus.ServerBusy);
connection.Send(errorMessage.Span);
}
return(true);
}
{
// Block controller
var written = _chainControllerBox.TryWrite(next);
if (written)
{
OnBlockMessageDispatched();
}
else
{
// Block controller is saturated.
Span <byte> buffer = stackalloc byte[ProtocolErrorResponse.SizeInBytes];
var errorMessage = new ProtocolErrorResponse(
buffer, requestId, clientId, ProtocolErrorStatus.ServerBusy);
connection.Send(errorMessage.Span);
}
}
}
finally
{
_inbox.Next();
}
return(true);
}
public void DoWork()
// TODO: [vermorel] method should return 'true' if any work has been done
{
var nextMessage = _inbox.Peek();
if (nextMessage.Length != 0)
{
// get message type and deserialize accordingly
var reqType = ClientServerMessage.GetMessageType(nextMessage);
switch (reqType)
{
// TODO: [vermorel] I don't like to too much the code below, it's highly repetitive, factorization is needed.
case MessageType.OpenBlock:
var openBlock = MessageSerializers.DeserializeOpenBlock(nextMessage);
UncommittedBlock block;
if (openBlock.ParentHandle == BlockAlias.GenesisParent && _chain.BlockchainLength == 0)
{
block = _chain.OpenFirstBlock();
}
else
{
block = _chain.OpenBlock(openBlock.ParentHandle);
}
var blockHandle =
new OpenedBlock(openBlock.RequestId, openBlock.ClientId, block.BlockId, block.Alias);
MessageSerializers.SerializeOpenedBlock(blockHandle, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, OpenedBlock.SizeInBytes));
break;
case MessageType.GetBlockHandle:
var getBlockHandle = MessageSerializers.DeserializeGetBlockHandle(nextMessage);
var retrievedHandle = _chain.RetrieveAlias(getBlockHandle.BlockId);
var returnMessage = new BlockHandleResponse(getBlockHandle.RequestId, getBlockHandle.ClientId,
retrievedHandle);
MessageSerializers.SerializeBlockHandleResponse(returnMessage, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, BlockHandleResponse.SizeInBytes));
break;
case MessageType.GetUncommittedBlockHandle:
var getUBlockHandle = MessageSerializers.DeserializeGetUncommittedBlockHandle(nextMessage);
var retrievedUHandle = _chain.RetrieveAlias(getUBlockHandle.UncommittedBlockId);
var returnMes = new BlockHandleResponse(getUBlockHandle.RequestId, getUBlockHandle.ClientId,
retrievedUHandle);
MessageSerializers.SerializeBlockHandleResponse(returnMes, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, BlockHandleResponse.SizeInBytes));
break;
case MessageType.CommitBlock:
var commitBlock = MessageSerializers.DeserializeCommitBlock(nextMessage);
_chain.CommitBlock(commitBlock.BlockHandle, commitBlock.BlockId);
var committedMessage =
new EverythingOkResponse(commitBlock.RequestId, commitBlock.ClientId);
MessageSerializers.SerializeEverythingOk(committedMessage, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, EverythingOkResponse.SizeInBytes));
break;
case MessageType.IsAncestor:
var isAncestor = MessageSerializers.DeserializeIsAncestor(nextMessage);
var res = _opti.IsAncestor(isAncestor.BlockHandle, isAncestor.MaybeAncestorHandle);
var isAncestorMessage = new AncestorResponse(isAncestor.RequestId, isAncestor.ClientId, res);
MessageSerializers.SerializeAncestorResponse(isAncestorMessage, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, AncestorResponse.SizeInBytes));
break;
case MessageType.IsPruneable:
var isPruneable = MessageSerializers.DeserializeIsPruneable(nextMessage);
var result = _opti.IsPruneable(isPruneable.BlockHandle);
var isPruneableMessage = new PruneableResponse(isPruneable.RequestId, isPruneable.ClientId, result);
MessageSerializers.SerializePruneableResponse(isPruneableMessage, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, PruneableResponse.SizeInBytes));
break;
case MessageType.GetBlockInfo:
var blockInfoReq = MessageSerializers.DeserializeGetBlockInfo(nextMessage);
// TODO: [vermorel] clarify the purpose of this test, unclear
if (_chain.RetrieveCommittedBlock(blockInfoReq.BlockHandle, out var blockInfoC))
{
var blockInfo =
new CommittedBlockInformation(blockInfoReq.RequestId, blockInfoReq.ClientId,
blockInfoC.BlockId, blockInfoC.Alias, blockInfoC.BlockHeight, blockInfoC.Parent);
MessageSerializers.SerializeCommittedBlockInfo(blockInfo, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, CommittedBlockInformation.SizeInBytes));
break;
}
else
{
_chain.RetrieveUncommittedBlock(blockInfoReq.BlockHandle, out var blockInfoU);
var blockInfo =
new UncommittedBlockInformation(blockInfoReq.RequestId, blockInfoReq.ClientId,
blockInfoU.BlockId, blockInfoU.Alias, blockInfoU.BlockHeight, blockInfoU.Parent);
MessageSerializers.SerializeUncommittedBlockInfo(blockInfo, _responseBuffer);
_outbox.TryWrite(new Span <byte>(_responseBuffer, 0, UncommittedBlockInformation.SizeInBytes));
break;
}
// TODO: [vermorel] the 'default:' case should be covered with an NotSupportedException.
}
_inbox.Next();
// TODO: errors are not yet handled.
}
}
public bool HandleResponse()
{
if (!_outbox.CanPeek)
{
return(false);
}
var next = _outbox.Peek().Span;
try
{
var message = new Message(next);
var kind = message.Header.MessageKind;
// Remove client ID from message
message.Header.ClientId = default;
if (_requestsInProgress >= ResponseBatchSize || _responseCountInPool > 0)
{
var nextResponse = _responsePool.GetSpan(next.Length);
next.CopyTo(nextResponse);
_responseCountInPool++;
if (_responseCountInPool >= ResponseBatchSize)
{
_socket.Send(_responsePool.Allocated());
_responsePool.Reset();
_responseCountInPool = 0;
}
}
else
{
_socket.Send(next);
}
Interlocked.Decrement(ref _requestsInProgress);
// Some responses trigger the termination of the controller.
if (kind == MessageKind.CloseConnectionResponse ||
kind == MessageKind.ProtocolErrorResponse)
{
if (kind == MessageKind.ProtocolErrorResponse)
{
var protocolResponse = new ProtocolErrorResponse(next);
_log?.Log(LogSeverity.Info, $"ConnectionController({ClientId}) on protocol error {protocolResponse.Status}.");
}
if (_responseCountInPool > 0)
{
_socket.Send(_responsePool.Allocated());
_responsePool.Reset();
_responseCountInPool = 0;
}
_tokenSource.Cancel();
}
}
finally
{
_outbox.Next();
}
return(true);
}