private void ReceivedS7PlcBlockInfoAckDatagram(Memory <byte> buffer)
{
var data = S7PlcBlockInfoAckDatagram.TranslateFromMemory(buffer);
if (_blockInfoHandler.TryGetValue(data.UserData.Header.ProtocolDataUnitReference, out var cbh))
{
if (data.UserData.Parameter.ParamErrorCode != (int)ErrorParameter.AtLeatOneOfTheGivenBlocksNotFound)
{
if (data.UserData.Parameter.ParamErrorCode != 0)
{
_logger?.LogError("Error while reading blockdata for reference {0}. ParamErrorCode: {1}", data.UserData.Header.ProtocolDataUnitReference, data.UserData.Parameter.ParamErrorCode);
cbh.Exception = new Dacs7ParameterException(data.UserData.Parameter.ParamErrorCode);
cbh.Event.Set(null);
}
if (data.UserData.Data == null)
{
_logger?.LogWarning("No data from blockinfo ack received for reference {0}", data.UserData.Header.ProtocolDataUnitReference);
}
}
cbh.Event.Set(data);
}
else
{
_logger?.LogWarning("No block info handler found for received read ack reference {0}", data.UserData.Header.ProtocolDataUnitReference);
}
}
public async Task <S7PlcBlockInfoAckDatagram> ReadBlockInfoAsync(PlcBlockType type, int blocknumber)
{
if (ConnectionState != ConnectionState.Opened)
{
ThrowHelper.ThrowNotConnectedException();
}
var id = GetNextReferenceId();
using (var dg = S7UserDataDatagram.TranslateToMemory(S7UserDataDatagram.BuildBlockInfoRequest(_s7Context, id, type, blocknumber), out var memoryLength))
{
using (var sendData = _transport.Build(dg.Memory.Slice(0, memoryLength), out var sendLength))
{
try
{
CallbackHandler <S7PlcBlockInfoAckDatagram> cbh;
S7PlcBlockInfoAckDatagram blockinfoResult = null;
using (await SemaphoreGuard.Async(_concurrentJobs).ConfigureAwait(false))
{
cbh = new CallbackHandler <S7PlcBlockInfoAckDatagram>(id);
_blockInfoHandler.TryAdd(cbh.Id, cbh);
try
{
if (await _transport.Client.SendAsync(sendData.Memory.Slice(0, sendLength)).ConfigureAwait(false) != SocketError.Success)
{
return(null);
}
blockinfoResult = await cbh.Event.WaitAsync(_s7Context.Timeout).ConfigureAwait(false);
}
finally
{
_blockInfoHandler.TryRemove(cbh.Id, out _);
}
}
HandlerErrorResult(id, cbh, blockinfoResult);
return(blockinfoResult);
}
catch (TaskCanceledException)
{
ThrowHelper.ThrowTimeoutException();
}
}
}
return(null);
}
private void HandlerErrorResult(ushort id, CallbackHandler <S7PlcBlockInfoAckDatagram> cbh, S7PlcBlockInfoAckDatagram blockinfoResult)
{
if (blockinfoResult == null)
{
if (_closeCalled)
{
ThrowHelper.ThrowNotConnectedException();
}
else
{
if (cbh.Exception != null)
{
ThrowHelper.ThrowException(cbh.Exception);
}
ThrowHelper.ThrowWriteTimeoutException(id);
}
}
}
public async Task <S7PlcBlockInfoAckDatagram> ReadBlockInfoAsync(PlcBlockType type, int blocknumber)
{
if (_closeCalled || ConnectionState != ConnectionState.Opened)
{
ThrowHelper.ThrowNotConnectedException();
}
var id = GetNextReferenceId();
using (var dg = S7UserDataDatagram.TranslateToMemory(S7UserDataDatagram.BuildBlockInfoRequest(_s7Context, id, type, blocknumber), out var memoryLength))
{
using (var sendData = _transport.Build(dg.Memory.Slice(0, memoryLength), out var sendLength))
{
try
{
CallbackHandler <S7PlcBlockInfoAckDatagram> cbh = null;
S7PlcBlockInfoAckDatagram blockinfoResult = null;
try
{
if (_concurrentJobs == null)
{
return(null);
}
using (await SemaphoreGuard.Async(_concurrentJobs).ConfigureAwait(false))
{
cbh = new CallbackHandler <S7PlcBlockInfoAckDatagram>(id);
if (_blockInfoHandler.TryAdd(id, cbh))
{
_logger?.LogTrace("Metadata read handler with id {id} was added.", id);
try
{
if (await _transport.Connection.SendAsync(sendData.Memory.Slice(0, sendLength)).ConfigureAwait(false) != SocketError.Success)
{
// we return false, because if one send faild we expect also all other ones failed.
_logger?.LogWarning("Could not send metadata read package with reference <{id}>.", id);
return(null);
}
blockinfoResult = await cbh.Event.WaitAsync(_s7Context.Timeout).ConfigureAwait(false);
}
finally
{
_blockInfoHandler.TryRemove(id, out _);
_logger?.LogTrace("Metadata read handler with id {id} was removed.", id);
}
}
else
{
_logger?.LogWarning("Could not add metadata read handler with reference <{id}>.", id);
}
}
}
catch (ObjectDisposedException)
{
if (cbh == null)
{
return(null);
}
}
HandlerErrorResult(id, cbh, blockinfoResult);
return(blockinfoResult);
}
catch (TaskCanceledException)
{
ThrowHelper.ThrowTimeoutException();
}
}
}
return(null);
}
