Added RollingFileLogFactory to support logging in separate files, all…

QuickFIXn/Logger/FileLog.cs

@@ -25,7 +25,14 @@ public class FileLog : ILog
     /// path separator (i.e. "/" will become "\" on windows, else "\" will become "/" on all other platforms)
     /// </param>
     /// <param name="sessionId"></param>
-    public FileLog(string fileLogPath, SessionID sessionId)
+    public FileLog(string fileLogPath, SessionID sessionId) : this(fileLogPath, sessionId, false)
+    {
+    }
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="createDailyLogFile"></param>
+    public FileLog(string fileLogPath, SessionID sessionId, bool createDailyLogFile)
     {
         string prefix = Prefix(sessionId);
 
@@ -34,8 +41,17 @@ public FileLog(string fileLogPath, SessionID sessionId)
         if (!System.IO.Directory.Exists(normalizedPath))
             System.IO.Directory.CreateDirectory(normalizedPath);
 
-        _messageLogFileName = System.IO.Path.Combine(normalizedPath, prefix + ".messages.current.log");
-        _eventLogFileName = System.IO.Path.Combine(normalizedPath, prefix + ".event.current.log");
+        if (createDailyLogFile)
+        {
+            string currentDate = DateTime.UtcNow.ToString("yyyyMMdd");
+            _messageLogFileName = System.IO.Path.Combine(fileLogPath, $"{currentDate}.{prefix}.messages.log");
+            _eventLogFileName = System.IO.Path.Combine(fileLogPath, $"{currentDate}.{prefix}.event.log");
+        }
+        else
+        {
+            _messageLogFileName = System.IO.Path.Combine(normalizedPath, prefix + ".messages.current.log");
+            _eventLogFileName = System.IO.Path.Combine(normalizedPath, prefix + ".event.current.log");
+        }    
 
         _messageLog = new System.IO.StreamWriter(_messageLogFileName, true);
         _eventLog = new System.IO.StreamWriter(_eventLogFileName, true);

QuickFIXn/Logger/RollingFileLogFactory.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QuickFix.Logger
+{
+    /// <summary>
+    /// Creates a message store that stores messages in a file separated by date
+    /// </summary>
+    public class RollingFileLogFactory : ILogFactory
+    {
+        private readonly SessionSettings _settings;
+
+        #region LogFactory Members
+
+        public RollingFileLogFactory(SessionSettings settings)
+        {
+            _settings = settings;
+        }
+
+        /// <summary>
+        /// Creates a file-based message store separated by date
+        /// </summary>
+        /// <param name="sessionId">session ID for the message store</param>
+        /// <returns></returns>
+        public ILog Create(SessionID sessionId)
+        {
+            return new FileLog(_settings.Get(sessionId).GetString(SessionSettings.FILE_LOG_PATH), sessionId,true);
+        }
+
+        #endregion
+    }
+}