adding quickfix library

quickfix/null_log.go

@@ -0,0 +1,37 @@
+// Copyright (c) quickfixengine.org  All rights reserved.
+//
+// This file may be distributed under the terms of the quickfixengine.org
+// license as defined by quickfixengine.org and appearing in the file
+// LICENSE included in the packaging of this file.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
+// THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// See http://www.quickfixengine.org/LICENSE for licensing information.
+//
+// Contact ask@quickfixengine.org if any conditions of this licensing
+// are not clear to you.
+
+package quickfix
+
+type nullLog struct{}
+
+func (l nullLog) OnIncoming([]byte)                   {}
+func (l nullLog) OnOutgoing([]byte)                   {}
+func (l nullLog) OnEvent(string)                      {}
+func (l nullLog) OnEventf(_ string, _ ...interface{}) {}
+
+type nullLogFactory struct{}
+
+func (nullLogFactory) Create() (Log, error) {
+	return nullLog{}, nil
+}
+func (nullLogFactory) CreateSessionLog(_ SessionID) (Log, error) {
+	return nullLog{}, nil
+}
+
+// NewNullLogFactory creates an instance of LogFactory that returns no-op loggers.
+func NewNullLogFactory() LogFactory {
+	return nullLogFactory{}
+}