/// <summary>
/// The CreateMessage method creates a new instance of
/// a specific FIX message in accordance with the message
/// definition in the dictionaries associated with the
/// specified FIX application layer version. The message
/// that is created by this implementation of the method
/// will also include a populated header and trailer that
/// conforms to the header and trailer definition found in
/// the specified session layer FIX version.
/// </summary>
/// <param name="sxVersion">
/// The session layer version of the FIX protocol that will
/// be used to locate message definitions for the message that
/// is to be created.
/// </param>
/// <param name="axVersion">
/// The application layer version of the FIX protocol that
/// will be used to locate the message definition for the
/// message that is to be created.
/// </param>
/// <param name="msgType">
/// The FIX message type of the message to create.
/// </param>
/// <returns>
/// The resulting instance of a FIX message.
/// </returns>
public FixMessage CreateMessage(string sxVersion, string axVersion, string msgType)
{
FixMessage result = new FixMessage();
// REC: Determine if the MsgType field has already
// been defined and maintain a reference so that it
// can be restored after this is done:
FixField fldMsgType = GetField(35);
// REC: Assign the specified MsgType to the internal
// field map so that it gets substituted:
SetField(new FixField(35, msgType));
PopulateHdrElements(sxVersion, result);
PopulateMsgElements(axVersion, msgType, result);
PopulateTrlElements(sxVersion, result);
// REC: Restore the previous value for the
// message type, if one was present:
if (fldMsgType != null)
{
SetField(fldMsgType);
}
else
{
// REC: The MsgType field was not present before
// this call was made, so remove it:
RemoveField(35);
}
return(result);
}
/// <summary>
/// The HandleSession_TestRequest method is invoked to
/// handle a test request that has been received from the
/// peer that the session is interacting with.
/// </summary>
/// <param name="msg">
/// The FIX test request received from the peer.
/// </param>
private void HandleSession_TestRequest(FixMessage msg)
{
if (_currentState == SessionStates.Session_Opened)
{
// REC: Dispatch the administrative message to the
// session's callback handler:
_handler.OnSessionRxAdmMessage(this, msg);
// REC: Construct a response message to the test
// request and dispatch it to the peer:
FixMessage msgResponse = _fixAssembler.CreateMessage(_sxVersion, _axVersion, "0");
if (msgResponse != null)
{
// REC: Retrieve the test request token from
// the incoming request and assign it to the
// outbound response message:
FixField fldTestReqID = msg.GetField(112);
if (fldTestReqID != null)
{
if (!string.IsNullOrEmpty(fldTestReqID.Content))
{
msgResponse.AddField(new FixField(112, fldTestReqID.Content));
}
}
Dispatch_AdmMessage(msgResponse);
}
}
else
{
}
}
public void OnSessionLogout(IVfxFixAppSession session, FixMessage msg)
{
FixField fixSCID = msg.Header.GetField(49);
FixField fixTCID = msg.Header.GetField(56);
Console.WriteLine(string.Format("FIX SERVER: {0} - LOGOUT.", fixSCID.Content));
}
public void OnSessionLogon(IVfxFixAppSession session, FixMessage msg)
{
FixField fixSCID = msg.Header.GetField(49);
FixField fixTCID = msg.Header.GetField(56);
Console.WriteLine(string.Format("FIX CLIENT: {0} - LOGON", fixSCID.Content));
System.Threading.ThreadPool.QueueUserWorkItem(HandleWork_SendMessages, session);
}
/// <summary>
/// The GetField method retrieves an instance of a field that
/// has been configured in the assembler instance.
/// </summary>
/// <param name="tag">
/// The FIX tag of the field to retrieve.
/// </param>
/// <returns>
/// The instance of the FIX field that corresponds to the
/// supplied tag, or null if there is no match.
/// </returns>
public FixField GetField(int tag)
{
FixField result = null;
if (_mapFields.ContainsKey(tag))
{
result = _mapFields[tag];
}
return(result);
}
// REC: The PopulateQueue method is a recursive function
// that loads all of the elements in a FixCollection into
// an instance of a SrcField queue so that the validator
// can then process all the elements sequentially:
private void PopulateQueue(Queue <SrcField> queue, FixCollection elements)
{
foreach (IFixElement element in elements)
{
if (element is FixField)
{
FixField msgField = element as FixField;
if (msgField != null)
{
// REC: Attempt to resolve the field's name
// by retrieving it using it's tag:
string fieldName = ResolveFieldName(msgField.Tag.ToString());
if (fieldName == null)
{
fieldName = "Unresolved";
}
// REC: Create a new instance of SrcField that
// represents the contents of this field:
SrcField srcField = new SrcField();
srcField.Tag = msgField.Tag.ToString();
srcField.Name = fieldName;
srcField.Value = msgField.Content;
queue.Enqueue(srcField);
}
}
else if (element is FixGroup)
{
FixGroup msgGroup = element as FixGroup;
if (msgGroup != null)
{
string groupName = ResolveFieldName(msgGroup.Tag.ToString());
if (groupName == null)
{
groupName = "Unresolved";
}
// REC: Create a new instance of SrcField that
// represents the contents of the group:
SrcField srcField = new SrcField();
srcField.Tag = msgGroup.Tag.ToString();
srcField.Name = groupName;
srcField.Value = msgGroup.Content;
queue.Enqueue(srcField);
foreach (FixCollection instance in msgGroup.Instances)
{
PopulateQueue(queue, instance);
}
}
}
}
}
/// <summary>
/// The SetField method registers an instance of a field with
/// the assembler. The assembler will use this field whenever
/// it constructs a message that contains the field's tag.
/// </summary>
/// <param name="field">
/// The FIX field to register with the assembler.
/// </param>
public void SetField(FixField field)
{
if (!_mapFields.ContainsKey(field.Tag))
{
_mapFields.Add(field.Tag, field);
}
else
{
_mapFields[field.Tag] = field;
}
}
/// <summary>
/// Updates the FIX value within the input FIX fields for the currently selected strategy.
/// </summary>
/// <param name="fixTag">FIX tag whose value is to be updated.</param>
/// <param name="value">New value for the FIX tag being updated.</param>
/// <remarks>This method is used to update FIX tag values that are used within StrategyEdits using the FIX_
/// mechanism. Controls that are initialized using the FIX_ mechanism and parameter values within strategies
/// are unaffected when invoking this method.</remarks>
public void UpdateFixValue(FixField fixTag, string value)
{
if (InputFixValues == null)
{
return;
}
InputFixValues[fixTag] = value;
if (ViewModel != null)
{
ViewModel.EvaluateAffectedStrategyEdits(this, fixTag);
}
}
/// <summary>
/// Evaluates all the underlying <see cref="StrategyEdit_t"/>s and notifies any interested parties of change
/// of state.
/// </summary>
/// <param name="inputValueProvider">Provider that providers access to any additional FIX field values that may
/// be required in the Edit evaluation.</param>
/// <returns>Summary state of all StrategyEdits after the evaluation.</returns>
public bool EvaluateAffected(FixFieldValueProvider inputValueProvider, FixField fixField)
{
bool overallState = true;
foreach (StrategyEditViewModel strategyEdit in this)
{
if (strategyEdit.Sources.Contains(Enum.GetName(typeof(FixField), fixField)))
{
overallState &= strategyEdit.Evaluate(inputValueProvider);
}
}
return(overallState);
}
/// <summary>
/// The HandleSession_Logon method is invoked to handle
/// a logon message that has been received from the peer
/// session that this session is communicating with.
/// </summary>
/// <param name="msg">
/// The FIX logon message received from the peer.
/// </param>
private void HandleSession_Logon(FixMessage msg)
{
// REC: Ensure that we're in the appropriate state
// to handle a logon message:
if (_currentState == SessionStates.Session_Pending || _currentState == SessionStates.Session_Closed)
{
// REC: Retrieve the FIX SenderCompID of the peer
// from the logon message:
FixField fldSenderCompID = msg.Header.GetField(49);
if (fldSenderCompID != null)
{
string rxSenderCompID = fldSenderCompID.Content;
if (string.IsNullOrEmpty(rxSenderCompID))
{
// HELP: Should the session send a reject message
// in this case, given that the peer didn't send
// its FIX SenderCompID, or should this throw an
// argument exception?
}
// REC: Transition to the opened state:
_currentState = SessionStates.Session_Opened;
// REC: Notify the session's owner that the session
// has received the logon response from the server:
_handler.OnSessionLogon(this, msg);
}
else
{
// REC: Throw an exception since the session has not
// yet been established and there will be no handler
// at the application level that can deal with this:
throw new ArgumentException("Logon message missing required field - SenderCompID.");
}
}
else
{
// REC: Notify the session handler that an
// administrative message has been received
// from the peer session:
_handler.OnSessionRxAdmMessage(this, msg);
// REC: Throw an exception that indicates the
// session is not in the appropriate state to
// handle the received message:
throw new InvalidOperationException("Session state invalid for received message.");
}
}
/// <summary>
/// The AddMessage_Entrypoint method is the asynchronous
/// entrypoint for processing add message requests that have
/// been enqueued to the .NET thread pool through the instance
/// of the sequencer that is associated with the database.
/// </summary>
/// <param name="state">
/// The instance of TaskDetails_Add that is associated with
/// the asynchronous add message request being processed.
/// </param>
private void AddMessage_Entrypoint(object state)
{
TaskDetails_Add taskDetails = state as TaskDetails_Add;
if (taskDetails != null)
{
FixField fldSequence = taskDetails.SessionMsg.Header.GetField(34);
if (fldSequence != null)
{
// REC: Retrieve the message's text so that its
// length can be assigned to its index entry:
string msgText = taskDetails.SessionMsg.ToString();
// REC: Create an entry for the message in the
// index file associated with the session:
if (_mapSessions.ContainsKey(taskDetails.SessionId))
{
SessionDetails details = _mapSessions[taskDetails.SessionId];
IndexEntry idxEntry = new IndexEntry();
idxEntry.msgOffset = details.MsgWriter.BaseStream.Position;
idxEntry.msgLength = msgText.Length;
idxEntry.msgSequence = int.Parse(fldSequence.Content);
details.Index.Add(idxEntry);
details.MsgWriter.Write(msgText.ToCharArray());
details.MsgWriter.Flush();
string idxLine = string.Format("{0}:{1}:{2}", idxEntry.msgSequence, idxEntry.msgOffset, idxEntry.msgLength);
details.IdxWriter.WriteLine(idxLine.ToCharArray());
details.IdxWriter.Flush();
}
}
}
}
/// <summary>
/// Evaluates all strategy edits within the currently selected strategy.
/// </summary>
/// <param name="inputValueProvider">Provider that providers access to any additional FIX field values that may
/// be required in the Edit evaluation.</param>
/// <returns>Summary state of all StrategyEdits after the evaluation.</returns>
public bool EvaluateAffectedStrategyEdits(IInitialFixValueProvider inputValueProvider, FixField updatedField)
{
FixFieldValueProvider additionalValues = inputValueProvider == null ?
FixFieldValueProvider.Empty : new FixFieldValueProvider(inputValueProvider, _underlyingStrategy.Parameters);
bool result = StrategyEdits.EvaluateAffected(additionalValues, updatedField);
foreach (ControlViewModel control in Controls)
{
control.OnValueChangeCompleted();
}
return(result);
}
/// <summary>
/// The HandleRxMessage method is invoked by the owner of an
/// instance of a session to inform it that data has arrived
/// from the peer system.
/// </summary>
/// <param name="mb">
/// The message block that contains the data received from
/// the peer system the session is communicating with.
/// </param>
public void HandleRxMessage(VfxEngine.Ipc.VfxMsgBlock mb)
{
string content = Encoding.ASCII.GetString(mb.Buffer, 0, mb.Length());
VfxFixParserResult fpr = _fixParser.Parse(content, null, null, null);
while (fpr.Status == VfxFixParserStatus.MsgComplete)
{
// REC: Adjust the read index in the message block
// to compensate for the number of bytes parsed from
// the incoming data stream:
mb.RdIndex += fpr.Consumed;
// REC: Crunch the message block to remove the data
// that has already been parsed:
mb.Crunch();
// REC: Reset the timestamp that is used to determine
// when the last message was received from the peer:
this._lastRxTicks = DateTime.Now.Ticks;
// REC: Determine if the message is a session layer
// message and process it accordingly:
FixField fldMsgType = fpr.Message.Header.GetField(35);
if (fldMsgType != null)
{
string strMsgType = fldMsgType.Content;
if (!string.IsNullOrEmpty(strMsgType))
{
switch (strMsgType)
{
case "A":
// Received a FIX logon message:
HandleSession_Logon(fpr.Message);
break;
case "0":
// Received a FIX heartbeat message:
HandleSession_Heartbeat(fpr.Message);
break;
case "1":
// Received a FIX test request:
HandleSession_TestRequest(fpr.Message);
break;
case "2":
// Received a FIX resend request:
HandleSession_Resend(fpr.Message);
break;
case "5":
// Received a FIX logout message:
HandleSession_Logout(fpr.Message);
break;
default:
// Received a message that should be
// routed to the session's owner:
HandleSession_Message(fpr.Message);
break;
}
}
else
{
// REC: If the session's identity hasn't been
// established yet, just throw an exception and
// let the session's owner shut it down:
if (_currentState == SessionStates.Session_Pending)
{
throw new ArgumentException("Initial message missing required field - FIX MsgType.");
}
else
{
// REC: The session has been established, so the
// session can send a reject message:
}
}
}
else
{
}
// REC: Attempt to parse another message from
// the buffer of data that has been received:
content = Encoding.ASCII.GetString(mb.Buffer, 0, mb.Length());
fpr = _fixParser.Parse(content, null, null, null);
}
// REC: If the parser couldn't extract a complete message
// from the supplied buffer, determine what to do next:
if (fpr.Status != VfxFixParserStatus.MsgComplete)
{
}
}
/// <summary>
/// The HandleSession_Logon method is invoked to handle
/// a logon message that has been received from the peer
/// session that this session is communicating with.
/// </summary>
/// <param name="msg">
/// The FIX logon message received from the peer.
/// </param>
private void HandleSession_Logon(FixMessage msg)
{
// REC: Ensure that we're in the appropriate state
// to handle a logon message:
if (_currentState == SessionStates.Session_Pending || _currentState == SessionStates.Session_Closed)
{
// REC: Retrieve the FIX SenderCompID of the peer
// from the logon message:
FixField fldSenderCompID = msg.Header.GetField(49);
if (fldSenderCompID != null)
{
// REC: The SenderCompID from the peer becomes the
// session's TargetCompID for outgoing messages:
_fixTargetCompID = fldSenderCompID.Content;
// REC: Now that the FIX SenderCompID of the peer
// session is known, it is used to construct the
// identifier for the session - used to retrieve
// the session's details from the database:
_sessionId = string.Format("{0}-{1}", _fixSenderCompID, _fixTargetCompID);
// REC: Attempt to retrieve the session details
// from the session database:
if (_fixDatabase != null)
{
// REC: Note that once a session record is acquired
// from the database, it must be released when it is
// no longer needed by the session instance...
_sessionRecord = _fixDatabase.AcquireSession(_sessionId);
if (this._resetSequence == true)
{
_sessionRecord.RxSequence = 1;
_sessionRecord.TxSequence = 1;
}
}
// REC: Register the peer session's SenderCompID as
// the TargetCompID for outgoing messages:
_fixAssembler.SetField(new FixField(56, _fixTargetCompID));
// REC: Assemble the response message:
FixMessage response = _fixAssembler.CreateMessage(_sxVersion, _axVersion, "A");
// REC: Handle the sequence number reset flag
// if it is present in the logon message:
FixField fieldReset = msg.GetField(141);
if (fieldReset != null)
{
response.AddField(new FixField(141, "Y"));
}
// REC: Transition to the opened state:
_currentState = SessionStates.Session_Opened;
// REC: Notify the session's owner that the peer
// session has sent the logon request:
_handler.OnSessionLogon(this, msg);
// REC: Dispatch the administrative message out
// to the session's owner:
Dispatch_AdmMessage(response);
}
else
{
// REC: Throw an exception since the session has not
// yet been established and there will be no handler
// at the application level that can deal with this:
throw new ArgumentException("Logon message missing required field - SenderCompID.");
}
}
else
{
// REC: Notify the session handler that an
// administrative message has been received
// from the peer session:
_handler.OnSessionRxAdmMessage(this, msg);
// REC: Throw an exception that indicates the
// session is not in the appropriate state to
// handle the received message:
//throw new InvalidOperationException("Session state invalid for received message.");
}
}
// REC: Validate an instance of the FixMessage class against
// the header/message/trailer definition in the dictionaries:
public List <FixValidationResult> Validate(FixMessage msg)
{
List <FixValidationResult> result = new List <FixValidationResult>();
// REC: Build a queue of all of the FIX elements that
// are contained in the message:
Queue <SrcField> srcFields = new Queue <SrcField>();
// REC: Add the elements that are in the message's
// header to the queue of source fields:
PopulateQueue(srcFields, msg.Header);
// REC: Add the elements that are in the message's
// body to the queue of source fields:
PopulateQueue(srcFields, msg.Content);
// REC: Add the elements that are in the message's
// trailer to the queue of source fields:
PopulateQueue(srcFields, msg.Trailer);
// REC: Create the MsgLayout structure that defines
// the layout of a message as it is defined in the
// configured FIX dictionaries:
MsgLayout msgLayout = new MsgLayout();
// REC: The message layout's header entries are
// copied from the cached list of entries that is
// created when the validator is configured:
foreach (FixValidationResult hdrEntry in _cachedHeader)
{
msgLayout.Header.Add(hdrEntry.Clone() as FixValidationResult);
}
// REC: The message layout's content entries are
// only configured if the corresponding message
// type can be found in the dictionaries:
FixField fldMsgType = msg.Header.GetField(35);
if (fldMsgType != null)
{
string strMsgType = fldMsgType.Content;
foreach (FixDictionary dx in _settings.Dictionaries)
{
FixDxMessage dxMessage = dx.GetMessageByType(strMsgType);
if (dxMessage != null)
{
// REC: Expand the list of elements contained
// in the message's definition and populate the
// message layout element list with them:
FixDxCollection msgElements = dx.Resolve(dxMessage.Elements);
foreach (IFixDxElement msgElement in msgElements)
{
msgLayout.Message.Add(CreateResult(msgElement));
}
break;
}
}
}
// REC: the message layout's trailer entries are
// copied from the cached list of entries that is
// created when the validator is configured:
foreach (FixValidationResult trlEntry in _cachedTrailer)
{
msgLayout.Trailer.Add(trlEntry.Clone() as FixValidationResult);
}
// REC: After the message layout has been defined
// the validator can compare the content of the
// source message to the layout definition:
return(ProcessElements(srcFields, msgLayout));
}
public void OnSessionRxAppMessage(IVfxFixAppSession session, FixMessage msg)
{
FixField fixSCID = msg.Header.GetField(49);
Console.WriteLine(string.Format("FIX SERVER: {0} SENT: {1}", fixSCID.Content, msg.ToString()));
}
