Observable logs (refactor some code)

src/WireMock.Net/Util/NamedReaderWriterLocker.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace WireMock.Util
+{
+    /// <summary>
+    /// http://johnculviner.com/achieving-named-lock-locker-functionality-in-c-4-0/
+    /// </summary>
+    internal class NamedReaderWriterLocker
+    {
+        private readonly ConcurrentDictionary<string, ReaderWriterLockSlim> _lockDict = new ConcurrentDictionary<string, ReaderWriterLockSlim>();
+
+        public ReaderWriterLockSlim GetLock(string name)
+        {
+            return _lockDict.GetOrAdd(name, s => new ReaderWriterLockSlim());
+        }
+
+        public TResult RunWithReadLock<TResult>(string name, Func<TResult> body)
+        {
+            var rwLock = GetLock(name);
+            try
+            {
+                rwLock.EnterReadLock();
+                return body();
+            }
+            finally
+            {
+                rwLock.ExitReadLock();
+            }
+        }
+
+        public void RunWithReadLock(string name, Action body)
+        {
+            var rwLock = GetLock(name);
+            try
+            {
+                rwLock.EnterReadLock();
+                body();
+            }
+            finally
+            {
+                rwLock.ExitReadLock();
+            }
+        }
+
+        public TResult RunWithWriteLock<TResult>(string name, Func<TResult> body)
+        {
+            var rwLock = GetLock(name);
+            try
+            {
+                rwLock.EnterWriteLock();
+                return body();
+            }
+            finally
+            {
+                rwLock.ExitWriteLock();
+            }
+        }
+
+        public void RunWithWriteLock(string name, Action body)
+        {
+            var rwLock = GetLock(name);
+            try
+            {
+                rwLock.EnterWriteLock();
+                body();
+            }
+            finally
+            {
+                rwLock.ExitWriteLock();
+            }
+        }
+
+        public void RemoveLock(string name)
+        {
+            ReaderWriterLockSlim o;
+            _lockDict.TryRemove(name, out o);
+        }
+    }
+}