/// <summary>
/// This method extends GrainFactory by adding a new GetGrain method
/// to it that can get the runtime type of the grain interface along
/// with its primary key, and return the grain casted to an interface
/// that the given grainInterfaceType extends it.
///
/// The main use-case is when you want to get a grain that its type
/// is unknown at compile time, and also SuperOutputGrainInterfaceType
/// is non-generic, while outputGrainInterfaceType is a generic type.
/// </summary>
/// <typeparam name="SuperOutputGrainInterfaceType">The output type of
/// the grain</typeparam>
/// <param name="gf">the grainFactory instance that this method
/// is extending its functionality</param>
/// <param name="grainID">the primary key of the grain</param>
/// <param name="grainInterfaceType">the runtime type of the grain
/// interface</param>
/// <param name="outputGrainInterfaceType">the type of grain interface
/// that should be returned</param>
/// <returns></returns>
public static IGrain GetGrain(this IGrainFactory gf, string grainID, Type grainInterfaceType, Type outputGrainInterfaceType)
{
Type interfaceType = grainInterfaceType;
GrainClassData implementation;
var grainTypeResolver = RuntimeClient.Current.GrainTypeResolver;
grainTypeResolver.TryGetGrainClassData(interfaceType, out implementation, "");
var grainId = TypeCodeMapper.ComposeGrainId(implementation, grainID, interfaceType);
return((IGrain)((GrainFactory)gf).Cast(((GrainFactory)gf).MakeGrainReferenceFromType(interfaceType, grainId), outputGrainInterfaceType));
}
/// <summary>
/// This method extends GrainFactory by adding a new GetGrain method
/// to it that can get the runtime type of the grain interface along
/// with its primary key, and return the grain casted to an interface
/// that the given grainInterfaceType extends it.
///
/// The main use-case is when you want to get a grain that its type
/// is unknown at compile time.
/// </summary>
/// <typeparam name="OutputGrainInterfaceType">The output type of
/// the grain</typeparam>
/// <param name="gf">the grainFactory instance that this method
/// is extending its functionality</param>
/// <param name="grainID">the primary key of the grain</param>
/// <param name="grainInterfaceType">the runtime type of the grain
/// interface</param>
/// <returns>the requested grain with the given grainID and grainInterfaceType</returns>
public static OutputGrainInterfaceType GetGrain <OutputGrainInterfaceType>(this IGrainFactory gf, Guid grainID, Type grainInterfaceType) where OutputGrainInterfaceType : IGrain
{
Type interfaceType = grainInterfaceType;
GrainClassData implementation;
var grainTypeResolver = RuntimeClient.Current.GrainTypeResolver;
grainTypeResolver.TryGetGrainClassData(interfaceType, out implementation, "");
var grainId = TypeCodeMapper.ComposeGrainId(implementation, grainID, interfaceType);
return(((GrainFactory)gf).Cast <OutputGrainInterfaceType>(((GrainFactory)gf).MakeGrainReferenceFromType(interfaceType, grainId)));
}
