Implemented most basic setting manager to get a setting's value.

src/Volo.Abp.Settings.Domain/Volo.Abp.Settings.Domain.csproj

@@ -15,7 +15,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Volo.Abp.Ddd\Volo.Abp.Ddd.csproj" />
-    <ProjectReference Include="..\Volo.Abp.MultiTenancy.Abstractions\Volo.Abp.MultiTenancy.Abstractions.csproj" />
     <ProjectReference Include="..\Volo.Abp.Settings\Volo.Abp.Settings.csproj" />
   </ItemGroup>
 

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/AbpSettingsDomainModule.cs

@@ -1,12 +1,10 @@
 using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp.Modularity;
-using Volo.Abp.MultiTenancy;
 
 namespace Volo.Abp.Settings
 {
     [DependsOn(typeof(AbpSettingsModule))]
     [DependsOn(typeof(AbpDddModule))]
-    [DependsOn(typeof(AbpMultiTenancyAbstractionsModule))]
     public class AbpSettingsDomainModule : AbpModule
     {
         public override void ConfigureServices(IServiceCollection services)

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/Setting.cs

@@ -1,14 +1,11 @@
 using System;
 using JetBrains.Annotations;
 using Volo.Abp.Domain.Entities;
-using Volo.Abp.MultiTenancy;
 
 namespace Volo.Abp.Settings
 {
-    public class Setting : Entity<Guid>, IMultiTenant
+    public class Setting : Entity<Guid>
     {
-        public virtual Guid? TenantId { get; protected set; }
-
         [NotNull]
         public virtual string Name { get; protected set; }
 
@@ -31,8 +28,7 @@ namespace Volo.Abp.Settings
             [NotNull] string name, 
             [NotNull] string value, 
             [CanBeNull] string entityType = null, 
-            [CanBeNull] string entityId = null, 
-            Guid? tenantId = null)
+            [CanBeNull] string entityId = null)
         {
             Check.NotNull(name, nameof(name));
             Check.NotNull(value, nameof(value));
@@ -42,7 +38,6 @@ namespace Volo.Abp.Settings
             Value = value;
             EntityType = entityType;
             EntityId = entityId;
-            TenantId = tenantId;
         }
     }
 }

src/Volo.Abp.Settings.Domain/Volo/Abp/Settings/SettingStore.cs

@@ -25,7 +25,7 @@ namespace Volo.Abp.Settings
             var setting = await _settingRepository.FindAsync(name, entityType, entityId);
             if (setting == null)
             {
-                setting = new Setting(GuidGenerator.Create(), name, value, entityType, entityId, CurrentTenant.Id);
+                setting = new Setting(GuidGenerator.Create(), name, value, entityType, entityId);
                 await _settingRepository.InsertAsync(setting);
             }
 

src/Volo.Abp.Settings/Volo/Abp/Settings/CurrentTenantSettingContributor.cs

@@ -1,21 +0,0 @@
-using System.Threading.Tasks;
-
-namespace Volo.Abp.Settings
-{
-    public class CurrentTenantSettingContributor : ISettingContributor
-    {
-        private readonly ISettingStore _settingStore;
-
-        public CurrentTenantSettingContributor(ISettingStore settingStore)
-        {
-            _settingStore = settingStore;
-        }
-
-        public async Task<string> GetOrNull(string name)
-        {
-            //Optimization: Get all Tenant-42 settings and cache it!
-            var tenantId = 42; //Get from current tenant
-            return await _settingStore.GetOrNullAsync(name, "Tenant", tenantId.ToString());
-        }
-    }
-}

src/Volo.Abp.Settings/Volo/Abp/Settings/DefaultSettingContributor.cs

@@ -1,8 +1,9 @@
 using System.Threading.Tasks;
+using Volo.Abp.DependencyInjection;
 
 namespace Volo.Abp.Settings
 {
-    public class DefaultSettingContributor : ISettingContributor
+    public class DefaultSettingContributor : ISettingContributor, ISingletonDependency
     {
         private readonly ISettingStore _settingStore;
 
@@ -10,10 +11,10 @@ namespace Volo.Abp.Settings
         {
             _settingStore = settingStore;
         }
-
-        public async Task<string> GetOrNull(string name)
+        
+        public async Task<string> GetOrNull(string name, string entityType, string entityId, bool fallback = true)
         {
-            //Optimization: Get all settings and cache it!
+            //TODO: Optimization: Get all settings and cache it!
             return await _settingStore.GetOrNullAsync(name, null, null);
         }
     }

src/Volo.Abp.Settings/Volo/Abp/Settings/ISettingContributor.cs

@@ -4,6 +4,6 @@ namespace Volo.Abp.Settings
 {
     public interface ISettingContributor
     {
-        Task<string> GetOrNull(string name);
+        Task<string> GetOrNull(string name, string entityType, string entityId, bool fallback = true);
     }
 }

src/Volo.Abp.Settings/Volo/Abp/Settings/SettingManager.cs

@@ -1,11 +1,32 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
 using Volo.Abp.DependencyInjection;
 
 namespace Volo.Abp.Settings
 {
-    public class SettingManager : ISettingManager, ITransientDependency
+    public class SettingManager : ISettingManager, ISingletonDependency
     {
+        protected Lazy<List<ISettingContributor>> Contributors { get; }
+
+        protected SettingOptions Options { get; }
+
+        public SettingManager(IOptions<SettingOptions> options, IServiceProvider serviceProvider)
+        {
+            Options = options.Value;
+
+            Contributors = new Lazy<List<ISettingContributor>>(
+                () => Options
+                    .Contributors
+                    .Select(c => serviceProvider.GetRequiredService(c) as ISettingContributor)
+                    .ToList(),
+                true
+            );
+        }
+
         public Task<string> GetOrNullAsync(string name)
         {
             return GetOrNullAsync(name, null, null);
@@ -13,11 +34,9 @@ namespace Volo.Abp.Settings
 
         public Task<string> GetOrNullAsync(string name, string entityType, string entityId, bool fallback = true)
         {
-            var contributors = new List<ISettingContributor>();
-
-            foreach (var contributor in contributors)
+            foreach (var contributor in Contributors.Value)
             {
-                var value = contributor.GetOrNull(name);
+                var value = contributor.GetOrNull(name, entityType, entityId, fallback);
                 if (value != null)
                 {
                     return value;

src/Volo.Abp.Settings/Volo/Abp/Settings/SettingOptions.cs

@@ -0,0 +1,17 @@
+using Volo.Abp.Collections;
+
+namespace Volo.Abp.Settings
+{
+    public class SettingOptions
+    {
+        public ITypeList<ISettingContributor> Contributors { get; }
+
+        public SettingOptions()
+        {
+            Contributors = new TypeList<ISettingContributor>
+            {
+                typeof(DefaultSettingContributor)
+            };
+        }
+    }
+}

test/Volo.Abp.Settings.Tests/Volo/Abp/Settings/AbpIdentityTestDataBuilder.cs

@@ -17,7 +17,6 @@ namespace Volo.Abp.Settings
         public void Build()
         {
             _settingRepository.InsertAsync(new Setting(_guidGenerator.Create(), "MySetting1", "42"));
-            _settingRepository.InsertAsync(new Setting(_guidGenerator.Create(), "MySetting2", "55"));
         }
     }
 }

test/Volo.Abp.Settings.Tests/Volo/Abp/Settings/SettingManager_Tests.cs

@@ -1,4 +1,6 @@
-using Xunit;
+using System.Threading.Tasks;
+using Shouldly;
+using Xunit;
 
 namespace Volo.Abp.Settings
 {
@@ -12,9 +14,10 @@ namespace Volo.Abp.Settings
         }
 
         [Fact]
-        public void Test1()
+        public async Task Test1()
         {
-            
+            var value = await _settingManager.GetOrNullAsync("MySetting1");
+            value.ShouldBe("42");
         }
     }
 }