public void InvocationDetailsObtainPublicMethodInfo()
{
var foo = new InvocationDetails
{
Type = typeof(Service),
InterfaceType = typeof(IService),
MethodName = "Foo",
ParamTypes = new Type[0],
GenericArguments = new Type[0]
};
Assert.IsTrue(foo.FindMethodInfo());
Assert.IsNotNull(foo.MethodInfo);
Assert.AreEqual(foo.MethodName, foo.MethodInfo.Name);
}
public void InvocationDetailsObtainPrivateMethodInfo()
{
var bar = new InvocationDetails
{
Type = typeof(Service),
InterfaceType = typeof(IService),
MethodName = "Bar",
ParamTypes = new Type[0],
GenericArguments = new Type[0]
};
Assert.IsTrue(bar.FindMethodInfo());
Assert.IsNotNull(bar.MethodInfo);
Assert.AreNotEqual(bar.MethodName, bar.MethodInfo.Name);
}
/// <summary>
/// Sets the session for the current worker thread.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_SetSession(InvocationDetails details)
{
// validate session
var sessionID = details.CallContextData.Store.ContainsKey("sessionid") ? (Guid)details.CallContextData.Store["sessionid"] : Guid.Empty;
if (!_host.SessionManager.ExistSession(sessionID))
{
throw new InvalidSessionException(string.Format(LanguageResource.InvalidSessionException_SessionIDInvalid, sessionID));
}
// double-check to avoid race condition
var session = _host.SessionManager.GetSessionBySessionID(sessionID);
if (session == null)
{
throw new InvalidSessionException(string.Format(LanguageResource.InvalidSessionException_SessionIDInvalid, sessionID));
}
// set current session
details.Session = session;
details.Session.Timestamp = DateTime.Now;
details.Session.ClientAddress = GetCallingClientIPAddress();
_host.SessionManager.SetCurrentSession(details.Session);
}
/// <summary>
/// Fires the InvokeRejected event.
/// </summary>
/// <param name="details">Invocation details</param>
/// <param name="ex">Exception</param>
private void Invoke_FireInvokeRejectedEvent(InvocationDetails details, Exception ex)
{
details.ExceptionThrown = true;
var args = new InvokeCanceledEventArgs
{
TrackingID = details.TrackingID,
CancelException = ex
};
_host.OnInvokeRejected(args);
throw args.CancelException.PreserveStackTrace() ?? new InvokeCanceledException();
}
/// <summary>
/// Converts method arguments, if needed.
/// <remarks>
/// Conversion is needed when Types configured for custom serialization or arguments are delegates.
/// </remarks>
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_ConvertMethodArguments(InvocationDetails details)
{
details.DelegateParamIndexes = new Dictionary<int, DelegateInterceptor>();
for (int i = 0; i < details.ParamTypes.Length; i++)
{
var delegateParamInterceptor = details.Args[i] as DelegateInterceptor;
if (delegateParamInterceptor != null)
{
details.DelegateParamIndexes.Add(i, delegateParamInterceptor);
continue;
}
var container = details.Args[i] as CustomSerializationContainer;
if (container != null)
{
var serializationHandler = _host.SerializationHandling[container.HandledType];
if (serializationHandler == null)
{
var ex = new KeyNotFoundException(string.Format(LanguageResource.KeyNotFoundException_SerializationHandlerNotFound, container.HandledType.FullName));
_host.OnInvokeCanceled(new InvokeCanceledEventArgs() { TrackingID = details.TrackingID, CancelException = ex });
throw ex;
}
details.Args[i] = serializationHandler.Deserialize(container.DataType, container.Data);
}
}
}
/// <summary>
/// Sets the remote subscription counter.
/// </summary>
/// <param name="details">The details.</param>
private void Invoke_SetRemoteSubscriptionCounter(InvocationDetails details)
{
if (details.CallContextData.Store != null && ServerSession.CurrentSession != null)
{
details.CallContextData.Store["subscriptions"] = ServerSession.CurrentSession.RemoteSubscriptionCounter;
}
}
/// <summary>
/// Adds a handler to an event of a server component.
/// </summary>
/// <param name="interfaceName">Name of the server component interface</param>
/// <param name="correlation">Correlation information</param>
/// <param name="uniqueName">Unique name of the server component instance (May left empty, if component isn´t registered with a unique name)</param>
/// <param name="callContext">Call context data</param>
public void AddEventHandler(string interfaceName, DelegateCorrelationInfo correlation, string uniqueName, LogicalCallContextData callContext)
{
if (string.IsNullOrEmpty(interfaceName))
throw new ArgumentException(LanguageResource.ArgumentException_InterfaceNameMissing, "interfaceName");
if (string.IsNullOrEmpty(uniqueName))
uniqueName = interfaceName;
if (!_host.ComponentRegistry.ContainsKey(uniqueName))
throw new KeyNotFoundException(string.Format(LanguageResource.KeyNotFoundException_CannotFindComponentForInterface, interfaceName));
var details = new InvocationDetails()
{
InterfaceName = interfaceName,
Registration = _host.ComponentRegistry[uniqueName],
CallContextData = callContext
};
Invoke_LoadCallContextData(details);
Invoke_SetSession(details);
Invoke_ResolveComponentInstance(details);
var correlationSet = new List<DelegateCorrelationInfo>
{
correlation
};
CreateClientServerWires(details.Type, details.Registration.EventStub, correlationSet, details.Registration.EventWirings);
}
/// <summary>
/// Processes AfterInvoke event subscriptions (if there any).
/// </summary>
/// <param name="details">Invocation details</param>
private void ProcessAfterInvoke(InvocationDetails details)
{
if (_host.HasAfterInvokeSubscriptions())
{
AfterInvokeEventArgs afterInvokeArgs = new AfterInvokeEventArgs()
{
TrackingID = details.TrackingID,
InterfaceName = details.InterfaceName,
DelegateCorrelationSet = details.DelegateCorrelationSet,
MethodName = details.MethodName,
Arguments = details.Args,
ReturnValue = details.ReturnValue
};
_host.OnAfterInvoke(afterInvokeArgs);
}
}
/// <summary>
/// Sets the session for the current worker thread.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_SetSession(InvocationDetails details)
{
// validate session
var sessionID = details.CallContextData.Store.ContainsKey("sessionid") ? (Guid)details.CallContextData.Store["sessionid"] : Guid.Empty;
if (!_host.SessionManager.ExistSession(sessionID))
{
throw new InvalidSessionException(string.Format(LanguageResource.InvalidSessionException_SessionIDInvalid, sessionID.ToString()));
}
// set current session
details.Session = _host.SessionManager.GetSessionBySessionID(sessionID);
details.Session.Timestamp = DateTime.Now;
ServerSession.CurrentSession = details.Session;
PutClientAddressToCurrentSession();
}
/// <summary>
/// Obtains metadata of the invoked method via reflection.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_ObtainMethodMetadata(InvocationDetails details)
{
details.MethodInfo = details.Type.GetMethod(details.MethodName, details.GenericArguments, details.ParamTypes);
if (details.MethodInfo == null)
{
var methodSignature = MessageHelpers.GetMethodSignature(details.Type, details.MethodName, details.ParamTypes);
var exceptionMessage = String.Format(LanguageResource.MissingMethodException_MethodNotFound, methodSignature);
throw new MissingMethodException(exceptionMessage);
}
}
/// <summary>
/// Processes remote method invocation.
/// </summary>
/// <param name="trackingID">Key for call tracking</param>
/// <param name="interfaceName">Name of the component interface</param>
/// <param name="delegateCorrelationSet">Correlation set for dynamic event and delegate wiring</param>
/// <param name="methodName">Name of the invoked method</param>
/// <param name="genericArguments">Generic arguments of the invoked method</param>
/// <param name="paramTypes">Parameter types</param>
/// <param name="callContext">Call context data</param>
/// <param name="args">Parameter values</param>
/// <returns>Return value</returns>
public object Invoke(Guid trackingID, string interfaceName, List<DelegateCorrelationInfo> delegateCorrelationSet, string methodName, Type[] genericArguments, Type[] paramTypes, LogicalCallContextData callContext, params object[] args)
{
if (string.IsNullOrEmpty(interfaceName))
throw new ArgumentException(LanguageResource.ArgumentException_InterfaceNameMissing, "interfaceName");
if (string.IsNullOrEmpty(methodName))
throw new ArgumentException(LanguageResource.ArgumentException_MethodNameMissing, "methodName");
// Reset session variable (May point to wrong session, if threadpool thread is reused)
ServerSession.CurrentSession = null;
var details = new InvocationDetails()
{
TrackingID = trackingID,
InterfaceName = interfaceName,
DelegateCorrelationSet = delegateCorrelationSet,
MethodName = methodName,
GenericArguments = genericArguments,
ParamTypes = paramTypes,
Args = args,
CallContextData = callContext
};
var beforeInvokeOccured = false;
try
{
//Invoke_LoadCallContextData(details);
Invoke_SetSession(details);
Invoke_SetTransaction(details);
beforeInvokeOccured = true;
ProcessBeforeInvoke(details);
Invoke_CheckInterfaceName(details);
Invoke_ConvertMethodArguments(details);
Invoke_ResolveComponentInstance(details);
Invoke_ObtainMethodMetadata(details);
Invoke_InterceptDelegateParams(details);
details.ReturnValue = details.MethodInfo.Invoke(details.Instance, details.Args, details.MethodInfo.IsOneWay());
Invoke_ApplyCustomSerializationOnReturnValue(details);
}
catch (Exception ex)
{
if (beforeInvokeOccured)
Invoke_FireInvokeCanceledEvent(details, ex);
else
Invoke_FireInvokeRejectedEvent(details, ex);
}
finally
{
Invoke_CompleteTransactionScope(details);
Invoke_CleanUp(details);
}
ProcessAfterInvoke(details);
return details.ReturnValue;
}
public void InvocationDetailsUnknownMethod()
{
var baz = new InvocationDetails
{
Type = typeof(Service),
InterfaceType = typeof(IService),
MethodName = "Baz",
ParamTypes = new Type[0],
GenericArguments = new Type[0]
};
Assert.IsFalse(baz.FindMethodInfo());
Assert.IsNull(baz.MethodInfo);
}
/// <summary>
/// Adds remote handlers to events of a server component.
/// </summary>
/// <param name="interfaceName">Name of the server component interface.</param>
/// <param name="correlationSet">Correlation information.</param>
/// <param name="uniqueName">Unique name of the server component instance (may be left empty, if component isn't registered with a unique name).</param>
public void AddEventHandlers(string interfaceName, IEnumerable<DelegateCorrelationInfo> correlationSet, string uniqueName)
{
if (string.IsNullOrEmpty(interfaceName))
throw new ArgumentException(LanguageResource.ArgumentException_InterfaceNameMissing, "interfaceName");
if (string.IsNullOrEmpty(uniqueName))
uniqueName = interfaceName;
if (!_host.ComponentCatalog.IsRegistered(uniqueName))
throw new KeyNotFoundException(string.Format(LanguageResource.KeyNotFoundException_CannotFindComponentForInterface, interfaceName));
var details = new InvocationDetails()
{
InterfaceName = interfaceName,
Registration = _host.ComponentCatalog.GetRegistration(uniqueName)
};
Invoke_LoadCallContextData(details);
Invoke_SetSession(details);
Invoke_ResolveComponentInstance(details);
CreateClientServerWires(details.Type, details.Registration.EventStub, correlationSet, details.Registration.EventWirings);
Invoke_CleanUp(details);
}
/// <summary>
/// Intercepts delegate parameters.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_InterceptDelegateParams(InvocationDetails details)
{
var serverMethodParamDefs = details.MethodInfo.GetParameters();
foreach (int index in details.DelegateParamIndexes.Keys)
{
var delegateParamInterceptor = details.DelegateParamIndexes[index];
var serverMethodParamDef = serverMethodParamDefs[index];
var dynamicWire = DynamicWireFactory.CreateDynamicWire(details.Type, serverMethodParamDef.ParameterType);
dynamicWire.Interceptor = delegateParamInterceptor;
details.Args[index] = dynamicWire.InDelegate;
}
}
/// <summary>
/// Called from client to send a heartbeat signal.
/// </summary>
/// <param name="sessionID">Client´s session key</param>
/// <param name="callContext">Call context data</param>
public void ReceiveClientHeartbeat(Guid sessionID, LogicalCallContextData callContext)
{
// validate server session
var details = new InvocationDetails();
details.CallContextData = callContext;
//Invoke_LoadCallContextData(details);
Invoke_SetSession(details);
// fire the heartbeat event
OnClientHeartbeatReceived(new ClientHeartbeatEventArgs(DateTime.Now, sessionID));
}
/// <summary>
/// Loads data from the logical call context.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_LoadCallContextData(InvocationDetails details)
{
// check for logical context data
details.CallContextData = CallContext.GetData("__ZyanContextData_" + _host.Name) as LogicalCallContextData;
if (details.CallContextData == null)
{
throw new SecurityException(LanguageResource.SecurityException_ContextInfoMissing);
}
}
/// <summary>
/// Applies custom serialization on return value (if configured).
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_ApplyCustomSerializationOnReturnValue(InvocationDetails details)
{
if (details.ReturnValue != null)
{
Type returnValueType = details.ReturnValue.GetType();
Type handledType;
ISerializationHandler handler;
_host.SerializationHandling.FindMatchingSerializationHandler(returnValueType, out handledType, out handler);
if (handler != null)
{
byte[] raw = handler.Serialize(details.ReturnValue);
details.ReturnValue = new CustomSerializationContainer(handledType, returnValueType, raw);
}
}
}
/// <summary>
/// Resolves the component instance to be invoked.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_ResolveComponentInstance(InvocationDetails details)
{
// Skip resolving registration, if already done
if (details.Registration == null)
details.Registration = _host.ComponentRegistry[details.InterfaceName];
// get component instance
details.Instance = _host.GetComponentInstance(details.Registration);
details.Type = details.Instance.GetType();
}
/// <summary>
/// Checks if the provided interface name belongs to a registered component.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_CheckInterfaceName(InvocationDetails details)
{
// look up the component registration info
if (!_host.ComponentRegistry.ContainsKey(details.InterfaceName))
throw new KeyNotFoundException(string.Format(LanguageResource.KeyNotFoundException_CannotFindComponentForInterface, details.InterfaceName));
}
/// <summary>
/// Sets a transaction for the current worker thread, if provided.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_SetTransaction(InvocationDetails details)
{
// transfer implicit transaction
var transaction = details.CallContextData.Store.ContainsKey("transaction") ? (Transaction)details.CallContextData.Store["transaction"] : null;
if (transaction != null)
details.Scope = new TransactionScope(transaction);
}
/// <summary>
/// Cleans up event handlers and component instance (if needed).
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_CleanUp(InvocationDetails details)
{
if (details.Instance != null && details.Registration != null &&
details.Registration.ActivationType == ActivationType.SingleCall)
{
_host.ComponentCatalog.CleanUpComponentInstance(details.Registration, details.Instance);
}
}
/// <summary>
/// Processes BeforeInvoke event subscriptions (if there any).
/// </summary>
/// <param name="details">Invocation details</param>
private void ProcessBeforeInvoke(InvocationDetails details)
{
if (_host.HasBeforeInvokeSubscriptions())
{
BeforeInvokeEventArgs cancelArgs = new BeforeInvokeEventArgs()
{
TrackingID = details.TrackingID,
InterfaceName = details.InterfaceName,
DelegateCorrelationSet = details.DelegateCorrelationSet,
MethodName = details.MethodName,
Arguments = details.Args,
Cancel = false
};
_host.OnBeforeInvoke(cancelArgs);
if (cancelArgs.Cancel)
{
if (cancelArgs.CancelException == null)
cancelArgs.CancelException = new InvokeCanceledException();
throw cancelArgs.CancelException.PreserveStackTrace();
}
details.InterfaceName = cancelArgs.InterfaceName;
details.DelegateCorrelationSet = cancelArgs.DelegateCorrelationSet;
details.MethodName = cancelArgs.MethodName;
details.Args = cancelArgs.Arguments;
}
}
/// <summary>
/// Completes the transaction scope, if no exception occured.
/// </summary>
/// <param name="details">Invocation details</param>
private void Invoke_CompleteTransactionScope(InvocationDetails details)
{
if (details.Scope != null)
{
if (!details.ExceptionThrown)
details.Scope.Complete();
details.Scope.Dispose();
}
}
/// <summary>
/// Processes remote method invocation.
/// </summary>
/// <param name="trackingID">Key for call tracking</param>
/// <param name="interfaceName">Name of the component interface</param>
/// <param name="delegateCorrelationSet">Correlation set for dynamic event and delegate wiring</param>
/// <param name="methodName">Name of the invoked method</param>
/// <param name="genericArguments">Generic arguments of the invoked method</param>
/// <param name="paramTypes">Parameter types</param>
/// <param name="args">Parameter values</param>
/// <returns>Return value</returns>
public object Invoke(Guid trackingID, string interfaceName, List <DelegateCorrelationInfo> delegateCorrelationSet, string methodName, Type[] genericArguments, Type[] paramTypes, params object[] args)
{
if (string.IsNullOrEmpty(interfaceName))
{
throw new ArgumentException(LanguageResource.ArgumentException_InterfaceNameMissing, "interfaceName");
}
if (string.IsNullOrEmpty(methodName))
{
throw new ArgumentException(LanguageResource.ArgumentException_MethodNameMissing, "methodName");
}
// Reset session variable (May point to wrong session, if threadpool thread is reused)
_host.SessionManager.SetCurrentSession(null);
var details = new InvocationDetails()
{
TrackingID = trackingID,
InterfaceName = interfaceName,
DelegateCorrelationSet = delegateCorrelationSet,
MethodName = methodName,
GenericArguments = genericArguments,
ParamTypes = paramTypes,
Args = args
};
var beforeInvokeOccured = false;
try
{
Invoke_LoadCallContextData(details);
Invoke_SetSession(details);
Invoke_SetTransaction(details);
beforeInvokeOccured = true;
ProcessBeforeInvoke(details);
Invoke_CheckInterfaceName(details);
Invoke_ConvertMethodArguments(details);
Invoke_ResolveComponentInstance(details);
Invoke_ObtainMethodMetadata(details);
Invoke_InterceptDelegateParams(details);
details.ReturnValue = details.MethodInfo.Invoke(details.Instance, details.Args, details.MethodInfo.IsOneWay());
Invoke_ApplyCustomSerializationOnReturnValue(details);
}
catch (Exception ex)
{
if (beforeInvokeOccured)
{
Invoke_FireInvokeCanceledEvent(details, ex);
}
else
{
Invoke_FireInvokeRejectedEvent(details, ex);
}
}
finally
{
Invoke_CompleteTransactionScope(details);
Invoke_SetRemoteSubscriptionCounter(details);
Invoke_CleanUp(details);
}
ProcessAfterInvoke(details);
return(details.ReturnValue);
}
/// <summary>
/// Fires the InvokeRejected event.
/// </summary>
/// <param name="details">Invocation details</param>
/// <param name="ex">Exception</param>
private void Invoke_FireInvokeRejectedEvent(InvocationDetails details, Exception ex)
{
details.ExceptionThrown = true;
var args = new InvokeCanceledEventArgs
{
TrackingID = details.TrackingID,
InterfaceName = details.InterfaceName,
DelegateCorrelationSet = details.DelegateCorrelationSet,
MethodName = details.MethodName,
Arguments = details.Args,
CancelException = ex
};
_host.OnInvokeRejected(args);
throw args.CancelException.PreserveStackTrace() ?? new InvokeCanceledException();
}
