/// <summary>
/// Raises the RemoteErrorOccurred event
/// </summary>
/// <param name="err"></param>
protected virtual void onRemoteErrorOccurred(RemoteError err)
{
if (this.RemoteErrorOccurred != null)
{
this.RemoteErrorOccurred(this, err);
}
}
public void TestRemoteErrorSerialization_MissingErrorCodeElement()
{
var error = new RemoteError();
error.ComponentName = "component";
var xml = error.Serialize();
xml.Element(XName.Get("ErrorCode", xml.Name.NamespaceName)).Remove();
var roundtrip = new RemoteError();
Assert.IsFalse(roundtrip.Validate(xml));
}
public void TestRemoteErrorSerialization_NoCallId()
{
var error = new RemoteError();
error.ComponentName = "component";
var xml = error.Serialize();
var roundtrip = new RemoteError();
Assert.IsTrue(roundtrip.Validate(xml));
roundtrip.Deserialize(xml);
Assert.IsNotNull(roundtrip);
Assert.AreEqual<Guid>(error.CallId, roundtrip.CallId);
Assert.AreEqual<string>(error.ComponentName, roundtrip.ComponentName);
Assert.AreEqual<RemoteErrorCode>(error.ErrorCode, roundtrip.ErrorCode);
}
/// <summary>
/// Processes an RemoteError
/// </summary>
/// <param name="error">The RemoteError that is to be processed</param>
protected virtual void processRemoteError(RemoteError error)
{
//if error was caused by synchronous method call, treat it as method response (thread will be blocked indefinitely otherwise)
if (error.CallId != null && error.CallId != Guid.Empty && synchronousCalls_WaitHandles.ContainsKey(error.CallId))
{
synchonousCalls_ValueCache.Add(error.CallId, error);
synchronousCalls_WaitHandles[error.CallId].Set();
//remove original call from unreplied calls, if it exists
if (unrepliedCalls.ContainsKey(error.CallId))
{
//if response for the call was expected, decrease the number of expected responses to prevent the connection from timing out
if (unrepliedCalls[error.CallId].ResponseExpected)
{
expectedResponseCount--;
}
unrepliedCalls.Remove(error.CallId);
}
}
//raise the RemoteErrorOccurred event
onRemoteErrorOccurred(error);
}
/// <summary>
/// Initializes a new instance of RemoteErrorException with the specified RemoteError
/// </summary>
/// <param name="error">The RemoteError that has occured</param>
public RemoteErrorException(RemoteError error)
{
this.Error = error;
}
/// <summary>
/// Processes an incoming message (using the MessageProcessor for deserialization)
/// </summary>
/// <param name="message">The message to be processed</param>
private void processMessage(ParsingResult message)
{
//parse the message
XElement xmlMessage;
RpcMessage msg = null;
var body = message.Payload.ToStringUTF8();
try
{
//try to parse it as XML
xmlMessage = XElement.Parse(body);
switch (xmlMessage.Name.LocalName.ToLower())
{
case "remotemethodcall":
msg = new RemoteMethodCall();
break;
case "remotemethodresponse":
msg = new RemoteMethodResponse();
break;
case "remoteerror":
msg = new RemoteError();
break;
}
if (!msg.Validate(xmlMessage))
{
logger.Error("Message from {0} could not be validated", this.Target);
var error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
msg.Deserialize(xmlMessage);
}
//Catch XmlException and wrap it into a format exception (makes catching errors in the caller easier)
catch (XmlException)
{
logger.Error("Could not parse message received from {0}", this.Target);
RemoteError error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
//encryption is mandatory if TrustLevel is 2 or higher
//if message was not encrypted it will result in a RemoteError and the connection will be reset
if (this.TrustLevel >= 2 && !message.WasEncrypted && !(msg is RemoteMethodCall && (msg as RemoteMethodCall).MethodName == CoreMethods.SendResetNotice))
{
RemoteError error = new RemoteError(RemoteErrorCode.EncryptionError);
if (msg.CallId != Guid.Empty)
{
error.CallId = msg.CallId;
}
error.ComponentName = "Authentication";
//The RemoteError will not be encrypted
WtlpClient.EncryptMessages = false;
sendMessage(error);
ResetConnection();
return;
}
if (msg is RemoteMethodCall)
{
//get the component responsible for handling the message
string componentName = (msg as RpcMessage).ComponentName;
var component = GetServerComponent(componentName);
if (component == null)
{
//no component to handle the request was found => send a RemoteError as response and return
RemoteError error = new RemoteError(RemoteErrorCode.ComponentNotFoundError);
error.CallId = (msg as RemoteMethodCall).CallId;
sendMessage(error);
return;
}
var processingTask = new Task(delegate
{
processRemoteMethodCall(msg as RemoteMethodCall, component);
});
processingTask.Start();
var heartBeatTask = new Task(delegate
{
var coreComponent = new CoreClientComponent();
coreComponent.ClientConnection = this;
while (!processingTask.IsCompleted)
{
Thread.Sleep(25000);
if (!processingTask.IsCompleted)
{
coreComponent.HeartbeatAsync();
}
}
});
heartBeatTask.Start();
}
else if (msg is RemoteMethodResponse)
{
processRemoteMethodResponse(msg as RemoteMethodResponse);
}
else if (msg is RemoteError)
{
processRemoteError(msg as RemoteError);
}
else
{
logger.Error("ProcessMessage() encoutered an unknown type of Message");
sendMessage(new RemoteError(RemoteErrorCode.UnknownMessage));
}
}
/// <summary>
/// Processes an incoming message (using the MessageProcessor for deserialization)
/// </summary>
/// <param name="message">The message to be processed</param>
private void processMessage(ParsingResult message)
{
//parse the message
XElement xmlMessage;
RpcMessage msg = null;
var body = message.Payload.ToStringUTF8();
try
{
//try to parse it as XML
xmlMessage = XElement.Parse(body);
switch (xmlMessage.Name.LocalName.ToLower())
{
case "remotemethodcall":
msg = new RemoteMethodCall();
break;
case "remotemethodresponse":
msg = new RemoteMethodResponse();
break;
case "remoteerror":
msg = new RemoteError();
break;
}
if (!msg.Validate(xmlMessage))
{
logger.Error("Message from {0} could not be validated", this.Target);
var error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
msg.Deserialize(xmlMessage);
}
//Catch XmlException and wrap it into a format exception (makes catching errors in the caller easier)
catch (XmlException)
{
logger.Error("Could not parse message received from {0}", this.Target);
RemoteError error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
//encryption is mandatory if TrustLevel is 2 or higher
//if message was not encrypted it will result in a RemoteError and the connection will be reset
if (this.TrustLevel >= 2 && !message.WasEncrypted && !(msg is RemoteMethodCall && (msg as RemoteMethodCall).MethodName == CoreMethods.SendResetNotice))
{
RemoteError error = new RemoteError(RemoteErrorCode.EncryptionError);
if (msg.CallId != Guid.Empty)
error.CallId = msg.CallId;
error.ComponentName = "Authentication";
//The RemoteError will not be encrypted
WtlpClient.EncryptMessages = false;
sendMessage(error);
ResetConnection();
return;
}
if (msg is RemoteMethodCall)
{
//get the component responsible for handling the message
string componentName = (msg as RpcMessage).ComponentName;
var component = GetServerComponent(componentName);
if (component == null)
{
//no component to handle the request was found => send a RemoteError as response and return
RemoteError error = new RemoteError(RemoteErrorCode.ComponentNotFoundError);
error.CallId = (msg as RemoteMethodCall).CallId;
sendMessage(error);
return;
}
var processingTask = new Task(delegate
{
processRemoteMethodCall(msg as RemoteMethodCall, component);
});
processingTask.Start();
var heartBeatTask = new Task(delegate
{
var coreComponent = new CoreClientComponent();
coreComponent.ClientConnection = this;
while (!processingTask.IsCompleted)
{
Thread.Sleep(25000);
if (!processingTask.IsCompleted)
coreComponent.HeartbeatAsync();
}
});
heartBeatTask.Start();
}
else if (msg is RemoteMethodResponse)
{
processRemoteMethodResponse(msg as RemoteMethodResponse);
}
else if (msg is RemoteError)
{
processRemoteError(msg as RemoteError);
}
else
{
logger.Error("ProcessMessage() encoutered an unknown type of Message");
sendMessage(new RemoteError(RemoteErrorCode.UnknownMessage));
}
}
/// <summary>
/// Processes an RemoteError
/// </summary>
/// <param name="error">The RemoteError that is to be processed</param>
protected virtual void processRemoteError(RemoteError error)
{
//if error was caused by synchronous method call, treat it as method response (thread will be blocked indefinitely otherwise)
if (error.CallId != null && error.CallId != Guid.Empty && synchronousCalls_WaitHandles.ContainsKey(error.CallId))
{
synchonousCalls_ValueCache.Add(error.CallId, error);
synchronousCalls_WaitHandles[error.CallId].Set();
//remove original call from unreplied calls, if it exists
if (unrepliedCalls.ContainsKey(error.CallId))
{
//if response for the call was expected, decrease the number of expected responses to prevent the connection from timing out
if(unrepliedCalls[error.CallId].ResponseExpected)
expectedResponseCount--;
unrepliedCalls.Remove(error.CallId);
}
}
//raise the RemoteErrorOccurred event
onRemoteErrorOccurred(error);
}
/// <summary>
/// Raises the RemoteErrorOccurred event
/// </summary>
/// <param name="err"></param>
protected virtual void onRemoteErrorOccurred(RemoteError err)
{
if (this.RemoteErrorOccurred != null)
this.RemoteErrorOccurred(this, err);
}
/// <summary>
/// Initializes a new instance of RemoteErrorException with the specified RemoteError
/// </summary>
/// <param name="error">The RemoteError that has occured</param>
public RemoteErrorException(RemoteError error)
{
this.Error = error;
}
/// <summary>
/// Initializes a new instance of RemoteErrorException
/// </summary>
public RemoteErrorException()
{
Error = null;
}
