public ShardPacketRouter(TcpSession session, IGrainFactory grainFactory, string shardName) : base(session)
{
GrainFactory = grainFactory;
ShardSession = GrainFactory.GetGrain <IShardSession>(Session.Id);
twoZeroBytes = new byte[] { 0, 0 };
packetCipher = new ShardPacketCipher();
packetReader = new ShardPacketReader(packetCipher, typeof(ClientPacketAttribute).GetTypeInfo().Assembly);
authenticationFailed = false;
this.shardName = shardName;
// populate the packet handler map
var handlerMapBuilder = ImmutableDictionary.CreateBuilder <Type, MethodInfo>();
var typeInfo = GetType().GetTypeInfo();
foreach (var method in typeInfo.DeclaredMethods)
{
foreach (var handlerAttribute in method.GetCustomAttributes <HandlerAttribute>(false))
{
if (method.ReturnType != typeof(Task))
{
throw new DramaException($"packet handler method {method.Name} must return {nameof(Task)}");
}
handlerMapBuilder.Add(handlerAttribute.PacketType, method);
}
}
PacketHandlers = handlerMapBuilder.ToImmutable();
}
public ShardPacketReader(ShardPacketCipher packetCipher, Assembly packetDefinitionAssembly)
{
this.packetCipher = packetCipher;
var annotatedTypes =
from type in packetDefinitionAssembly.GetExportedTypes()
where type.GetTypeInfo().GetCustomAttributes <ClientPacketAttribute>().Any()
select type;
packetMap = ImmutableDictionary.CreateRange(
annotatedTypes.SelectMany(
annotatedType => annotatedType.GetTypeInfo().GetCustomAttributes <ClientPacketAttribute>().Select(
attribute => new KeyValuePair <ShardClientOpcode, Type>(attribute.Opcode, annotatedType)
)
)
);
}