private void BuildAnnotatedMessageHandlers()
{
// create a handler for every method which has MessageHandlerAttribute
var methods = _type.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
foreach (var method in methods)
{
var attr = method.GetCustomAttribute <MessageHandlerAttribute>();
if (attr == null)
{
continue;
}
var messageType = attr.Type ?? method.GetParameters()[0].ParameterType;
var isAsyncMethod = (method.ReturnType.Name.StartsWith("Task"));
var filterChain = _filterHandlerBuilder.Build(method, FilterChainKind.Message);
var isSyncHandler = isAsyncMethod == false && filterChain.AsyncFilterExists == false;
var isReentrant = isSyncHandler == false && HandlerBuilderHelpers.IsReentrantMethod(method);
if (isAsyncMethod == false && method.GetCustomAttribute <AsyncStateMachineAttribute>() != null)
{
throw new InvalidOperationException($"Async void handler is not supported. ({_type.FullName}.{method.Name})");
}
AddHandler(method, messageType, filterChain, isSyncHandler, isReentrant);
}
}
private static Type[] GetInterfacePayloadTypeTable(Type interfaceType)
{
var payloadTypes = (Type[])HandlerBuilderHelpers.GetInterfacePayloadTypeTable(interfaceType, PayloadTableKind.Notification);
if (payloadTypes == null || payloadTypes.GetLength(0) != interfaceType.GetMethods().Length)
{
throw new InvalidOperationException(
$"Mismatched a payload table for {interfaceType.FullName}");
}
return(payloadTypes);
}
private void BuildRegularInterfaceHandlers()
{
foreach (var ifs in _type.GetInterfaces())
{
if (ifs.GetInterfaces().All(t => t != typeof(IInterfacedObserver) && t != typeof(IInterfacedObserverSync)))
{
continue;
}
var primaryInterface = ifs;
var alternativeInterfaceAttribute = ifs.GetCustomAttribute <AlternativeInterfaceAttribute>();
if (alternativeInterfaceAttribute != null)
{
primaryInterface = alternativeInterfaceAttribute.Type.IsGenericType
? alternativeInterfaceAttribute.Type.MakeGenericType(ifs.GetGenericArguments())
: alternativeInterfaceAttribute.Type;
}
var interfaceMap = _type.GetInterfaceMap(ifs);
var methodItems = interfaceMap.InterfaceMethods.Zip(interfaceMap.TargetMethods, Tuple.Create)
.OrderBy(p => p.Item1, new MethodInfoComparer())
.ToArray();
var payloadTypeTable = GetInterfacePayloadTypeTable(primaryInterface);
// build a decorated handler for each method.
for (var i = 0; i < methodItems.Length; i++)
{
var targetMethod = methodItems[i].Item2;
var invokePayloadType = payloadTypeTable[i];
var filterChain = _filterHandlerBuilder.Build(targetMethod, FilterChainKind.Notification);
var isSyncHandler = alternativeInterfaceAttribute == null && filterChain.AsyncFilterExists == false;
var isReentrant = isSyncHandler == false && HandlerBuilderHelpers.IsReentrantMethod(targetMethod);
AddHandler(ifs, targetMethod, invokePayloadType, filterChain, isSyncHandler, isReentrant);
}
}
}
private void BuildExtendedInterfaceHandlers()
{
var targetMethods =
_type.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)
.Where(m => m.GetCustomAttribute <ExtendedHandlerAttribute>() != null)
.Select(m => Tuple.Create(m, m.GetCustomAttribute <ExtendedHandlerAttribute>()))
.ToList();
var extendedInterfaces =
_type.GetInterfaces()
.Where(t => t.FullName.StartsWith("Akka.Interfaced.IExtendedInterface"))
.SelectMany(t => t.GenericTypeArguments)
.Where(t => t.GetInterfaces().Any(i => i == typeof(IInterfacedObserver)));
// includes base interfaces
var extendedAllInterfaces = extendedInterfaces
.Concat(extendedInterfaces.SelectMany(t => t.GetInterfaces().Where(u => u != typeof(IInterfacedObserver))))
.Distinct().ToArray();
foreach (var ifs in extendedAllInterfaces)
{
var payloadTypeTable = GetInterfacePayloadTypeTable(ifs);
var interfaceMethods = ifs.GetMethods().OrderBy(m => m, new MethodInfoComparer()).ToArray();
// build a decorated handler for each method.
for (var i = 0; i < interfaceMethods.Length; i++)
{
var interfaceMethod = interfaceMethods[i];
var invokePayloadType = payloadTypeTable[i];
var name = interfaceMethod.Name;
var parameters = interfaceMethod.GetParameters();
// find a method which can handle this invoke payload
MethodInfo targetMethod = null;
foreach (var method in targetMethods)
{
if (method.Item2.Type != null || method.Item2.Method != null)
{
// check tagged method
if (method.Item2.Type != null && method.Item2.Type != ifs)
{
continue;
}
if (method.Item2.Method != null && method.Item2.Method != name)
{
continue;
}
}
else if (method.Item1.Name != name)
{
// check method
continue;
}
if (HandlerBuilderHelpers.AreParameterTypesEqual(method.Item1.GetParameters(), parameters))
{
if (targetMethod != null)
{
throw new InvalidOperationException(
$"Ambiguous handlers for {ifs.FullName}.{interfaceMethod.Name} method.\n" +
$" {targetMethod.Name}\n {method.Item1.Name}\n");
}
targetMethod = method.Item1;
}
}
if (targetMethod == null)
{
throw new InvalidOperationException(
$"Cannot find handler for {ifs.FullName}.{interfaceMethod.Name}");
}
targetMethods.RemoveAll(x => x.Item1 == targetMethod);
// build handler
var isAsyncMethod = targetMethod.ReturnType.Name.StartsWith("Task");
var filterChain = _filterHandlerBuilder.Build(targetMethod, FilterChainKind.Notification);
var isSyncHandler = isAsyncMethod == false && filterChain.AsyncFilterExists == false;
var isReentrant = isSyncHandler == false && HandlerBuilderHelpers.IsReentrantMethod(targetMethod);
if (isAsyncMethod == false && targetMethod.GetCustomAttribute <AsyncStateMachineAttribute>() != null)
{
throw new InvalidOperationException($"Async void handler is not supported. ({_type.FullName}.{targetMethod.Name})");
}
AddHandler(ifs, targetMethod, invokePayloadType, filterChain, isSyncHandler, isReentrant);
}
}
}