If you need to add fields to the logon message when you initiate a session, do it in the toAdmin callback of the Applicationinterface. For example, a counterparty may ask to have a user identifier placed in the SenderSubID field and a password put into the RawData field.
In the toAdmin callback, if the message is a logon message (being sent to the counterparty) then add your fields. The sent message will include whatever changes you make to the Logon message in the callback.
private String userID;
private String password;
public void toAdmin(Message message, SessionID sessionId) {
if (isMessageOfType(message, MsgType.LOGON)) {
addLogonField(message);
}
super.toAdmin(message, sessionId);
}
private void addLogonField(Message message) {
message.getHeader().setField(new SenderSubID(userID));
message.getHeader().setField(new RawDataLength(password.length()));
message.getHeader().setField(new RawData(password));
}
private boolean isMessageOfType(Message message, String type) {
try {
return type.equals(message.getHeader().getField(new MsgType()).getValue());
} catch (FieldNotFound e) {
logErrorToSessionLog(message, e);
return false;
}
}
private void logErrorToSessionLog(Message message, FieldNotFound e) {
LogUtil.logThrowable(MessageUtils.getSessionID(message), e.getMessage(), e);
}
1 Comment
Henry Chan
Is QF/J able to accept custom Logon messages created above? Say, how can it be configured to accept a logon with SenderSubID or TargetSubID?