static Cache()
{
HanlderTypes = MessageBusOptions.Assemblies.SelectMany(x => x.GetTypes()).Where(x =>
x.IsClass &&
!x.IsAbstract &&
x.GetInterfaces().Any(y =>
y.IsGenericType && y.GetGenericTypeDefinition() == typeof(IMessageHandler <>))
).ToList();
MessageTypes = HanlderTypes
.SelectMany(x => x.GetInterfaces())
.Where(x => x.IsGenericType && x.GetGenericTypeDefinition() == typeof(IMessageHandler <>))
.Select(x => x.GetGenericArguments()[0])
.Distinct()
.ToList();
MessageTypes.ForEach(aMessageType =>
{
var interfaceType = typeof(IMessageHandler <>).MakeGenericType(aMessageType);
var handlers = HanlderTypes.Where(x => interfaceType.IsAssignableFrom(x))
.ToArray();
if (handlers.Length > 1)
{
throw new Exception($"消息{aMessageType.Name}有多个订阅者:{string.Join(",", handlers.Select(x => x.Name))}");
}
Message2Handler.Add(aMessageType, handlers[0]);
});
}