From 8f2fbf7a99c5f67daf2a1589fa12b1287a076bed Mon Sep 17 00:00:00 2001
From: Gary Wilber <Spacetech326@gmail.com>
Date: Thu, 1 Oct 2020 16:24:35 -0700
Subject: Switch to TPL dataflow for subfolder scan

---
 MediaBrowser.Controller/Library/TaskMethods.cs | 133 -------------------------
 1 file changed, 133 deletions(-)
 delete mode 100644 MediaBrowser.Controller/Library/TaskMethods.cs

(limited to 'MediaBrowser.Controller/Library/TaskMethods.cs')

diff --git a/MediaBrowser.Controller/Library/TaskMethods.cs b/MediaBrowser.Controller/Library/TaskMethods.cs
deleted file mode 100644
index 66bfbe0d9..000000000
--- a/MediaBrowser.Controller/Library/TaskMethods.cs
+++ /dev/null
@@ -1,133 +0,0 @@
-using System;
-using System.Collections.Concurrent;
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
-using MediaBrowser.Controller.Configuration;
-
-namespace MediaBrowser.Controller.Library
-{
-    /// <summary>
-    /// Helper methods for running tasks concurrently.
-    /// </summary>
-    public static class TaskMethods
-    {
-        private static readonly int _processorCount = Environment.ProcessorCount;
-
-        private static readonly ConcurrentDictionary<SharedThrottleId, SemaphoreSlim> _sharedThrottlers = new ConcurrentDictionary<SharedThrottleId, SemaphoreSlim>();
-
-        /// <summary>
-        /// Throttle id for sharing a concurrency limit.
-        /// </summary>
-        public enum SharedThrottleId
-        {
-            /// <summary>
-            /// Library scan fan out
-            /// </summary>
-            ScanFanout,
-
-            /// <summary>
-            /// Refresh metadata
-            /// </summary>
-            RefreshMetadata,
-        }
-
-        /// <summary>
-        /// Gets or sets the configuration manager.
-        /// </summary>
-        public static IServerConfigurationManager ConfigurationManager { get; set; }
-
-        /// <summary>
-        /// Similiar to Task.WhenAll but only allows running a certain amount of tasks at the same time.
-        /// </summary>
-        /// <param name="throttleId">The throttle id. Multiple calls to this method with the same throttle id will share a concurrency limit.</param>
-        /// <param name="actions">List of actions to run.</param>
-        /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>A <see cref="Task"/> representing the result of the asynchronous operation.</returns>
-        public static async Task WhenAllThrottled(SharedThrottleId throttleId, IEnumerable<Func<Task>> actions, CancellationToken cancellationToken)
-        {
-            var taskThrottler = throttleId == SharedThrottleId.ScanFanout ?
-                new SemaphoreSlim(GetConcurrencyLimit(throttleId)) :
-                _sharedThrottlers.GetOrAdd(throttleId, id => new SemaphoreSlim(GetConcurrencyLimit(id)));
-
-            try
-            {
-                var tasks = new List<Task>();
-
-                foreach (var action in actions)
-                {
-                    await taskThrottler.WaitAsync(cancellationToken).ConfigureAwait(false);
-
-                    tasks.Add(Task.Run(async () =>
-                    {
-                        try
-                        {
-                            await action().ConfigureAwait(false);
-                        }
-                        finally
-                        {
-                            taskThrottler.Release();
-                        }
-                    }));
-                }
-
-                await Task.WhenAll(tasks).ConfigureAwait(false);
-            }
-            finally
-            {
-                if (throttleId == SharedThrottleId.ScanFanout)
-                {
-                    taskThrottler.Dispose();
-                }
-            }
-        }
-
-        /// <summary>
-        /// Runs a task within a given throttler.
-        /// </summary>
-        /// <param name="throttleId">The throttle id. Multiple calls to this method with the same throttle id will share a concurrency limit.</param>
-        /// <param name="action">The action to run.</param>
-        /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>A <see cref="Task"/> representing the result of the asynchronous operation.</returns>
-        public static async Task RunThrottled(SharedThrottleId throttleId, Func<Task> action, CancellationToken cancellationToken)
-        {
-            if (throttleId == SharedThrottleId.ScanFanout)
-            {
-                // just await the task instead
-                throw new InvalidOperationException("Invalid throttle id");
-            }
-
-            var taskThrottler = _sharedThrottlers.GetOrAdd(throttleId, id => new SemaphoreSlim(GetConcurrencyLimit(id)));
-
-            await taskThrottler.WaitAsync(cancellationToken).ConfigureAwait(false);
-
-            try
-            {
-                await action().ConfigureAwait(false);
-            }
-            finally
-            {
-                taskThrottler.Release();
-            }
-        }
-
-        /// <summary>
-        /// Get the concurrency limit for the given throttle id.
-        /// </summary>
-        /// <param name="throttleId">The throttle id.</param>
-        /// <returns>The concurrency limit.</returns>
-        private static int GetConcurrencyLimit(SharedThrottleId throttleId)
-        {
-            var concurrency = throttleId == SharedThrottleId.RefreshMetadata ?
-                ConfigurationManager.Configuration.LibraryMetadataRefreshConcurrency :
-                ConfigurationManager.Configuration.LibraryScanFanoutConcurrency;
-
-            if (concurrency <= 0)
-            {
-                concurrency = _processorCount;
-            }
-
-            return concurrency;
-        }
-    }
-}
-- 
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