Support configure code-only configuration for StackExchange.Redis bus (#453)

* feat: support configure code-only configuration for StackExchange.Redis bus

* fix: remove ConfigurationOptions to string

Author: Memoyu

bus/EasyCaching.Bus.Redis/Configurations/RedisBusOptions.cs

@@ -1,6 +1,7 @@
 namespace EasyCaching.Bus.Redis
 {
     using EasyCaching.Core.Configurations;
+    using StackExchange.Redis;
 
     /// <summary>
     /// Redis bus options.
@@ -17,5 +18,10 @@ public class RedisBusOptions : BaseRedisOptions
         /// Gets or sets the serializer name that should be use in this bus.
         /// </summary>
         public string SerializerName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Redis database ConfigurationOptions will use.
+        /// </summary>
+        public ConfigurationOptions ConfigurationOptions { get; set; }
     }
 }

bus/EasyCaching.Bus.Redis/Configurations/RedisSubscriberProvider.cs

@@ -48,6 +48,9 @@ public ISubscriber GetSubscriber()
         /// <returns>The connection multiplexer.</returns>
         private ConnectionMultiplexer CreateConnectionMultiplexer()
         {
+            if (_options.ConfigurationOptions != null)
+                return ConnectionMultiplexer.Connect(_options.ConfigurationOptions);
+
             if (string.IsNullOrWhiteSpace(_options.Configuration))
             {
                 var configurationOptions = new ConfigurationOptions
@@ -67,7 +70,7 @@ private ConnectionMultiplexer CreateConnectionMultiplexer()
                     configurationOptions.EndPoints.Add(endpoint.Host, endpoint.Port);
                 }
 
-                return ConnectionMultiplexer.Connect(configurationOptions.ToString());
+                return ConnectionMultiplexer.Connect(configurationOptions);
             }
             else
             {

test/EasyCaching.UnitTests/CachingTests/HybridCachingTest.cs

@@ -1,11 +1,14 @@
 namespace EasyCaching.UnitTests
 {
+    using EasyCaching.Bus.Redis;
     using EasyCaching.Core;
     using EasyCaching.Core.Bus;
     using EasyCaching.HybridCache;
     using FakeItEasy;
     using Microsoft.Extensions.DependencyInjection;
     using Microsoft.Extensions.Options;
+    using Microsoft.VisualBasic.FileIO;
+    using StackExchange.Redis;
     using System;
     using System.Threading;
     using System.Threading.Tasks;
@@ -148,6 +151,30 @@ public void Second_Client_Set_Same_Key_Should_Get_New_Value()
             Assert.Equal("value", res.Value);
         }
 
+        [Fact]
+        public void WithRedisBus_Use_Configuration_Options_Should_Succeed()
+        {
+            IServiceCollection services = new ServiceCollection();
+
+            var redisConfig = ConfigurationOptions.Parse("127.0.0.1:6379");
+            redisConfig.DefaultDatabase = 6;
+            services.AddEasyCaching(option =>
+            {
+                option.WithRedisBus(config =>
+                {
+                    config.ConfigurationOptions = redisConfig;
+                    config.SerializerName = "myredis";
+                });
+            });
+            IServiceProvider serviceProvider = services.BuildServiceProvider();
+            var dbProvider = serviceProvider.GetService<IRedisSubscriberProvider>();
+            Assert.NotNull(dbProvider);
+            var mul = dbProvider.GetSubscriber().Multiplexer;
+
+            Assert.Equal(6,  mul.GetDatabase().Database);
+        }
+
+
         [Fact]
         public void Send_Msg_Throw_Exception_Should_Not_Break()
         {