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Make ComponentFactory thread-safe

This commit is contained in:
Steve Sanderson 2018-02-22 23:03:04 +00:00
parent c408045e31
commit 8ff4cee323
1 changed files with 7 additions and 2 deletions
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9
src/Microsoft.AspNetCore.Blazor/Components/ComponentFactory.cs
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@ -2,6 +2,7 @@
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
@ -10,11 +11,12 @@ namespace Microsoft.AspNetCore.Blazor.Components
{
internal class ComponentFactory
{
private readonly IServiceProvider _serviceProvider;
private readonly static BindingFlags _injectablePropertyBindingFlags
= BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
private readonly IServiceProvider _serviceProvider;
private readonly IDictionary<Type, Action<IComponent>> _cachedInitializers
= new Dictionary<Type, Action<IComponent>>();
= new ConcurrentDictionary<Type, Action<IComponent>>();
public ComponentFactory(IServiceProvider serviceProvider)
{
@ -37,6 +39,9 @@ namespace Microsoft.AspNetCore.Blazor.Components
private void PerformPropertyInjection(IComponent instance)
{
// This is thread-safe because _cachedInitializers is a ConcurrentDictionary.
// We might generate the initializer more than once for a given type, but would
// still produce the correct result.
var instanceType = instance.GetType();
if (!_cachedInitializers.TryGetValue(instanceType, out var initializer))
{