simplify log singleton management

src/StardewModdingAPI/Framework/LogWriter.cs

@@ -6,64 +6,44 @@ using System.Linq;
 namespace StardewModdingAPI.Framework
 {
     /// <summary>A log writer which queues messages for output, and periodically flushes them to the console and log file.</summary>
+    /// <remarks>Only one instance should be created.</remarks>
     internal class LogWriter
     {
         /*********
         ** Properties
         *********/
-        /// <summary>The singleton instance.</summary>
-        private static LogWriter _instance;
-
         /// <summary>The queued messages to flush.</summary>
-        private static ConcurrentQueue<LogInfo> Queue;
+        private readonly ConcurrentQueue<LogInfo> Queue;
 
         /// <summary>The underlying file stream.</summary>
-        private static StreamWriter FileStream;
-
-
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The singleton instance.</summary>
-        internal static LogWriter Instance
-        {
-            get
-            {
-                if (LogWriter._instance == null)
-                {
-                    LogWriter._instance = new LogWriter();
-                    // Field cannot be used by anything else regardless, do not surround with lock { }
-                    // ReSharper disable once InconsistentlySynchronizedField
-                    LogWriter.Queue = new ConcurrentQueue<LogInfo>();
-                    Console.WriteLine(Constants.LogPath);
-
-                    // If the ErrorLogs dir doesn't exist StreamWriter will throw an exception.
-                    if (!Directory.Exists(Constants.LogDir))
-                    {
-                        Directory.CreateDirectory(Constants.LogDir);
-                    }
-
-                    LogWriter.FileStream = new StreamWriter(Constants.LogPath, false);
-                    Console.WriteLine("Created log instance");
-                }
-                return LogWriter._instance;
-            }
-        }
+        private readonly StreamWriter FileStream;
 
 
         /*********
         ** Public methods
         *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="path">The log path to write.</param>
+        public LogWriter(string path)
+        {
+            // create log directory (required for stream writer)
+            Directory.CreateDirectory(Path.GetDirectoryName(path));
+
+            // initialise
+            this.Queue = new ConcurrentQueue<LogInfo>();
+            this.FileStream = new StreamWriter(Constants.LogPath, false);
+        }
+
         /// <summary>Queue a message for output.</summary>
         /// <param name="message">The message to log.</param>
         public void WriteToLog(string message)
         {
-            lock (LogWriter.Queue)
+            lock (this.Queue)
             {
                 var logEntry = new LogInfo(message);
-                LogWriter.Queue.Enqueue(logEntry);
+                this.Queue.Enqueue(logEntry);
 
-                if (LogWriter.Queue.Any())
+                if (this.Queue.Any())
                     this.FlushLog();
             }
         }
@@ -72,10 +52,10 @@ namespace StardewModdingAPI.Framework
         /// <param name="message">The message to log.</param>
         public void WriteToLog(LogInfo message)
         {
-            lock (LogWriter.Queue)
+            lock (this.Queue)
             {
-                LogWriter.Queue.Enqueue(message);
-                if (LogWriter.Queue.Any())
+                this.Queue.Enqueue(message);
+                if (this.Queue.Any())
                     this.FlushLog();
             }
         }
@@ -84,26 +64,23 @@ namespace StardewModdingAPI.Framework
         /*********
         ** Private methods
         *********/
-        /// <summary>Construct an instance.</summary>
-        private LogWriter() { }
-
         /// <summary>Flush the underlying queue to the console and file.</summary>
         private void FlushLog()
         {
-            lock (LogWriter.FileStream)
+            lock (this.FileStream)
             {
                 LogInfo entry;
-                while (LogWriter.Queue.TryDequeue(out entry))
+                while (this.Queue.TryDequeue(out entry))
                 {
-                    string m = $"[{entry.LogTime}] {entry.Message}";
+                    string message = $"[{entry.LogTime}] {entry.Message}";
 
                     Console.ForegroundColor = entry.Colour;
-                    Console.WriteLine(m);
+                    Console.WriteLine(message);
                     Console.ForegroundColor = ConsoleColor.Gray;
 
-                    LogWriter.FileStream.WriteLine(m);
+                    this.FileStream.WriteLine(message);
                 }
-                LogWriter.FileStream.Flush();
+                this.FileStream.Flush();
             }
         }
     }

src/StardewModdingAPI/Log.cs

@@ -16,7 +16,7 @@ namespace StardewModdingAPI
         private static readonly Random Random = new Random();
 
         /// <summary>The underlying log writer.</summary>
-        private static readonly LogWriter Writer = LogWriter.Instance;
+        private static readonly LogWriter Writer = new LogWriter(Constants.LogPath);
 
 
         /*********