/// <summary>
/// Prevents a default instance of the <see cref="ServiceFactory<TContract>"/> class from being created.
/// </summary>
/// <param name="channelId">The channel id.</param>
/// <param name="implementationType">Type of the implementation.</param>
private ServiceFactory(String channelId, Type implementationType)
{
if (string.IsNullOrEmpty(channelId))
{
ThrowHelper.ThrowArgumentNullException("channelId");
}
if (implementationType == null)
{
ThrowHelper.ThrowArgumentNullException("implementationType");
}
if (!ServiceContract.IsAssignableFrom(implementationType))
{
throw new ArgumentException("Provided implementation does not implements the contract interface.", "implementationType");
}
ContractValidator.ValidateContractIntegrity(ServiceContract);
ImplementationValidator.ValidateImplementationIntegrity(implementationType);
this.mChannel = ChannelServices.GetChannelById(channelId);
if (this.mChannel == null)
{
throw new ChannelNotFoundException(channelId);
}
this.mImplementationType = implementationType;
// adatstruktúra adminisztrációja
// egy factory csak azt adhatja hozzá, ami nincs és csak azt veheti el, ami még nem volt.
ContractServiceSideDescriptor descriptor = null;
Dictionary <Type, ContractServiceSideDescriptor> contractDescriptors = ServiceBaseServices.ContractDescriptors;
lock (contractDescriptors)
{
if (contractDescriptors.ContainsKey(ServiceContract))
{
// ismert contract
descriptor = contractDescriptors[ServiceContract];
}
else
{
// ilyen contract még nincs
mControlServiceContract = true;
mControlChannel = true;
}
}
if (descriptor != null)
{
lock (descriptor)
{
if (!descriptor.ImplementationPerChannel.ContainsKey(channelId))
{
mControlChannel = true;
}
else
{
if (descriptor.ImplementationPerChannel.ContainsKey(channelId))
{
// ehhez a csatornához és contracthoz már egy másik implementáció van rendelve
Type currentImplType = descriptor.ImplementationPerChannel[channelId];
if (!currentImplType.Equals(implementationType))
{
throw new ArgumentException(String.Format("Unable to register provided implementation type: '{0}'. An other implementation type '{1}' has already definied for channel '{2}' and contract '{3}'.", implementationType.FullName, currentImplType.FullName, channelId, ServiceContract.FullName));
}
}
}
}
}
ChannelServices.UnregisterChannelEvent += new EventHandler <ChannelRegistrationEventArgs>(ChannelUnregisteredEventHandler);
}
