Resolve #1503 Reuse Contract Resolver, improve performance.

framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/AuditingContractResolver.cs

@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Reflection;
 using Newtonsoft.Json;
@@ -35,5 +36,13 @@ namespace Volo.Abp.Auditing
 
             return property;
         }
+
+        private static readonly ConcurrentDictionary<List<Type>, AuditingContractResolver> AuditingContractResolverdDictionary = new ConcurrentDictionary<List<Type>, AuditingContractResolver>();
+
+        public static AuditingContractResolver GetSharedAuditingContractResolver(List<Type> ignoredTypes)
+        {
+            return AuditingContractResolverdDictionary.GetOrAdd(ignoredTypes,
+                x => new AuditingContractResolver(ignoredTypes));
+        }
     }
 }

framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/JsonNetAuditSerializer.cs

@@ -18,7 +18,7 @@ namespace Volo.Abp.Auditing
         {
             var options = new JsonSerializerSettings
             {
-                ContractResolver = new AuditingContractResolver(Options.IgnoredTypes)
+                ContractResolver = AuditingContractResolver.GetSharedAuditingContractResolver(Options.IgnoredTypes)
             };
 
             return JsonConvert.SerializeObject(obj, options);

framework/src/Volo.Abp.Http.Client/Volo/Abp/Http/Client/DynamicProxying/ApiDescriptionFinder.cs

@@ -18,6 +18,9 @@ namespace Volo.Abp.Http.Client.DynamicProxying
 
         protected IApiDescriptionCache Cache { get; }
 
+        private static readonly CamelCasePropertyNamesContractResolver SharedCamelCasePropertyNamesContractResolver =
+            new CamelCasePropertyNamesContractResolver();
+
         public ApiDescriptionFinder(
             IApiDescriptionCache cache, 
             IDynamicProxyHttpClientFactory httpClientFactory)
@@ -97,7 +100,7 @@ namespace Volo.Abp.Http.Client.DynamicProxying
                     typeof(ApplicationApiDescriptionModel),
                     new JsonSerializerSettings
                     {
-                        ContractResolver = new CamelCasePropertyNamesContractResolver()
+                        ContractResolver = SharedCamelCasePropertyNamesContractResolver
                     });
 
                 return (ApplicationApiDescriptionModel)result;

framework/src/Volo.Abp.Json/Volo/Abp/Json/Newtonsoft/NewtonsoftJsonSerializer.cs

@@ -9,6 +9,9 @@ namespace Volo.Abp.Json.Newtonsoft
     {
         private readonly AbpJsonIsoDateTimeConverter _dateTimeConverter;
 
+        private static readonly CamelCaseExceptDictionaryKeysResolver SharedCamelCaseExceptDictionaryKeysResolver =
+            new CamelCaseExceptDictionaryKeysResolver();
+
         public NewtonsoftJsonSerializer(AbpJsonIsoDateTimeConverter dateTimeConverter)
         {
             _dateTimeConverter = dateTimeConverter;
@@ -37,7 +40,7 @@ namespace Volo.Abp.Json.Newtonsoft
             
             if (camelCase)
             {
-                settings.ContractResolver = new CamelCaseExceptDictionaryKeysResolver();
+                settings.ContractResolver = SharedCamelCaseExceptDictionaryKeysResolver;
             }
 
             if (indented)

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/Json/JsonLocalizationDictionaryBuilder.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using Microsoft.Extensions.Localization;
@@ -9,6 +9,9 @@ namespace Volo.Abp.Localization.Json
 {
     public static class JsonLocalizationDictionaryBuilder
     {
+        private static readonly CamelCasePropertyNamesContractResolver SharedCamelCasePropertyNamesContractResolver =
+            new CamelCasePropertyNamesContractResolver();
+
         /// <summary>
         ///     Builds an <see cref="JsonLocalizationDictionaryBuilder" /> from given file.
         /// </summary>
@@ -38,7 +41,7 @@ namespace Volo.Abp.Localization.Json
                     jsonString,
                     new JsonSerializerSettings
                     {
-                        ContractResolver = new CamelCasePropertyNamesContractResolver()
+                        ContractResolver = SharedCamelCasePropertyNamesContractResolver
                     });
             }
             catch (JsonException ex)

framework/test/Volo.Abp.AspNetCore.Tests/Volo/Abp/AspNetCore/AbpAspNetCoreTestBase.cs

@@ -11,12 +11,15 @@ namespace Volo.Abp.AspNetCore
     public abstract class AbpAspNetCoreTestBase<TStartup> : AbpAspNetCoreIntegratedTestBase<TStartup>
         where TStartup : class
     {
+        private static readonly CamelCasePropertyNamesContractResolver SharedCamelCasePropertyNamesContractResolver =
+            new CamelCasePropertyNamesContractResolver();
+
         protected virtual async Task<T> GetResponseAsObjectAsync<T>(string url, HttpStatusCode expectedStatusCode = HttpStatusCode.OK)
         {
             var strResponse = await GetResponseAsStringAsync(url, expectedStatusCode);
             return JsonConvert.DeserializeObject<T>(strResponse, new JsonSerializerSettings
             {
-                ContractResolver = new CamelCasePropertyNamesContractResolver()
+                ContractResolver = SharedCamelCasePropertyNamesContractResolver
             });
         }