public object GetInstance(Type channel)
{
if (_existingChannels.ContainsKey(channel))
{
MethodInfo initContext = channel.BaseType.GetProperty("Context").GetSetMethod(true);
IChannelMethodContext context = _contextProvider.GetDefaultContext();
object[] mparam = new object[] { context };
initContext.Invoke(_existingChannels[channel], mparam);
return(_existingChannels[channel]);
}
ConstructorInfo ctor = channel.GetConstructor(new Type[0]);
string methodName = $"{channel.Name}Ctor";
DynamicMethod dynamicMtd = new DynamicMethod(methodName, channel, new Type[0]);
ILGenerator iLGenerator = dynamicMtd.GetILGenerator();
iLGenerator.Emit(OpCodes.Newobj, ctor);
iLGenerator.Emit(OpCodes.Ret);
ChannelObject channelObject = (ChannelObject)dynamicMtd.CreateDelegate(typeof(ChannelObject));
object channelInstace = channelObject();
PropertyInfo[] properties = channel.GetProperties();
foreach (PropertyInfo property in properties)
{
if (property.GetCustomAttribute <ImportedServiceAttribute>() != null)
{
object service = _importResolver.GetImportedService(property.PropertyType);
property.SetValue(channelInstace, service);
}
}
_existingChannels.Add(channel, channelInstace);
return(channelInstace);
}
public object GetInstance(Type channel)
{
//If channel is already instantiated its important to change old Context to current request Context
if (_existingChannels.ContainsKey(channel))
{
MethodInfo initContext = channel.BaseType.GetProperty("Context").GetSetMethod(true);
IChannelMethodContext context = _contextProvider.GetDefaultContext();
object[] mparam = new object[] { context };
initContext.Invoke(_existingChannels[channel], mparam);
return(_existingChannels[channel]);
}
//From the performance perspective its much much faster to generate instance with IL than with Activator
ConstructorInfo ctor = channel.GetConstructor(new Type[0]);
string methodName = $"{channel.Name}Ctor";
DynamicMethod dynamicMtd = new DynamicMethod(methodName, channel, new Type[0]);
ILGenerator iLGenerator = dynamicMtd.GetILGenerator();
iLGenerator.Emit(OpCodes.Newobj, ctor);
iLGenerator.Emit(OpCodes.Ret);
ChannelObject channelObject = (ChannelObject)dynamicMtd.CreateDelegate(typeof(ChannelObject));
object channelInstace = channelObject();
//Since channels can have services that have ImportedService attribute its crucial to find them
//so that channels dont break when trying to invoke requested service
PropertyInfo[] properties = channel.GetProperties();
foreach (PropertyInfo property in properties)
{
if (property.GetCustomAttribute <ImportedServiceAttribute>() != null)
{
object service = _importResolver.GetImportedService(property.PropertyType);
property.SetValue(channelInstace, service);
}
}
_existingChannels.Add(channel, channelInstace);
return(channelInstace);
}
public void SetChannelMethodContext(IChannelEndpoint endpoint, IChannelMethodContext context)
{
_contexts.Add(endpoint, context);
}
