First structures for rabbitmq event consumer

Squidex.sln

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26228.4
+VisualStudioVersion = 15.0.26228.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Squidex", "src\Squidex\Squidex.csproj", "{61F6BBCE-A080-4400-B194-70E2F5D2096E}"
 EndProject
@@ -36,6 +36,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tools", "tools", "{1667F3B4
 EndProject
 Project("{13B669BE-BB05-4DDF-9536-439F39A36129}") = "GenerateLanguages", "tools\GenerateLanguages\GenerateLanguages.csproj", "{927E1F1C-95F0-4991-B33F-603977204B02}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Squidex.Infrastructure.RabbitMq", "src\Squidex.Infrastructure.RabbitMq\Squidex.Infrastructure.RabbitMq.csproj", "{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -162,6 +164,18 @@ Global
 		{927E1F1C-95F0-4991-B33F-603977204B02}.Release|x64.Build.0 = Release|Any CPU
 		{927E1F1C-95F0-4991-B33F-603977204B02}.Release|x86.ActiveCfg = Release|Any CPU
 		{927E1F1C-95F0-4991-B33F-603977204B02}.Release|x86.Build.0 = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|x64.Build.0 = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Debug|x86.Build.0 = Debug|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|x64.ActiveCfg = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|x64.Build.0 = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|x86.ActiveCfg = Release|Any CPU
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -180,5 +194,6 @@ Global
 		{8B074219-F69A-4E41-83C6-12EE1E647779} = {4C6B06C2-6D77-4E0E-AE32-D7050236433A}
 		{D7166C56-178A-4457-B56A-C615C7450DEE} = {8CF53B92-5EB1-461D-98F8-70DA9B603FBF}
 		{927E1F1C-95F0-4991-B33F-603977204B02} = {1667F3B4-31E6-45B2-90FB-97B1ECFE9874}
+		{C1E5BBB6-6B6A-4DE5-B19D-0538304DE343} = {8CF53B92-5EB1-461D-98F8-70DA9B603FBF}
 	EndGlobalSection
 EndGlobal

src/Squidex.Infrastructure.RabbitMq/RabbitMqEventConsumer.cs

@@ -0,0 +1,95 @@
+// ==========================================================================
+//  RabbitMqEventConsumer.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System;
+using System.Text;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using RabbitMQ.Client;
+using Squidex.Infrastructure.CQRS.Events;
+using Squidex.Infrastructure.Tasks;
+
+// ReSharper disable InvertIf
+
+namespace Squidex.Infrastructure.RabbitMq
+{
+    public sealed class RabbitMqEventConsumer : DisposableObjectBase, IExternalSystem, IEventConsumer
+    {
+        private readonly string exchange;
+        private readonly string streamFilter;
+        private readonly ConnectionFactory connectionFactory;
+        private readonly Lazy<IConnection> connection;
+        private readonly Lazy<IModel> channel;
+
+        public string Name
+        {
+            get { return GetType().Name; }
+        }
+
+        public string StreamFilter
+        {
+            get { return streamFilter; }
+        }
+
+        public RabbitMqEventConsumer(string uri, string exchange, string streamFilter)
+        {
+            Guard.NotNullOrEmpty(uri, nameof(uri));
+            Guard.NotNullOrEmpty(exchange, nameof(exchange));
+
+            connectionFactory = new ConnectionFactory { Uri = uri };
+
+            connection = new Lazy<IConnection>(connectionFactory.CreateConnection);
+            channel = new Lazy<IModel>(() => connection.Value.CreateModel());
+
+            this.exchange = exchange;
+
+            this.streamFilter = streamFilter;
+        }
+
+        protected override void DisposeObject(bool disposing)
+        {
+            if (connection.IsValueCreated)
+            {
+                connection.Value.Close();
+                connection.Value.Dispose();
+            }
+        }
+
+        public void Connect()
+        {
+            try
+            {
+                var currentConnection = connection.Value;
+
+                if (!currentConnection.IsOpen)
+                {
+                    throw new ConfigurationException($"RabbitMq event bus failed to connect to {connectionFactory.Endpoint}");
+                }
+            }
+            catch (Exception e)
+            {
+                throw new ConfigurationException($"RabbitMq event bus failed to connect to {connectionFactory.Endpoint}", e);
+            }
+        }
+
+        public Task ClearAsync()
+        {
+            return TaskHelper.Done;
+        }
+
+        public Task On(Envelope<IEvent> @event)
+        {
+            var jsonString = JsonConvert.SerializeObject(@event);
+            var jsonBytes = Encoding.UTF8.GetBytes(jsonString);
+
+            channel.Value.BasicPublish(exchange, string.Empty, null, jsonBytes);
+
+            return TaskHelper.Done;
+        }
+    }
+}

src/Squidex.Infrastructure.RabbitMq/RabbitMqOptions.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Squidex.Infrastructure.RabbitMq
+{
+    class RabbitMqOptions
+    {
+    }
+}

src/Squidex.Infrastructure.RabbitMq/Squidex.Infrastructure.RabbitMq.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netstandard1.6</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <DebugType>full</DebugType>
+    <DebugSymbols>True</DebugSymbols>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="4.1.3" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\src\Squidex.Infrastructure\Squidex.Infrastructure.csproj" />
+  </ItemGroup>
+</Project>

src/Squidex.Infrastructure/CQRS/Events/EventReceiver.cs

@@ -66,6 +66,8 @@ namespace Squidex.Infrastructure.CQRS.Events
 
         public void Next()
         {
+            ThrowIfDisposed();
+
             timer?.Trigger();
         }
 
@@ -73,6 +75,8 @@ namespace Squidex.Infrastructure.CQRS.Events
         {
             Guard.NotNull(eventConsumer, nameof(eventConsumer));
 
+            ThrowIfDisposed();
+
             if (timer != null)
             {
                 return;

src/Squidex/Config/Domain/RabbitMqModule.cs

@@ -0,0 +1,47 @@
+// ==========================================================================
+//  RabbitMqModule.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using Autofac;
+using Microsoft.Extensions.Configuration;
+using Squidex.Infrastructure;
+using Squidex.Infrastructure.CQRS.Events;
+using Squidex.Infrastructure.RabbitMq;
+
+// ReSharper disable InvertIf
+
+namespace Squidex.Config.Domain
+{
+    public sealed class RabbitMqModule : Module
+    {
+        private IConfiguration Configuration { get; }
+
+        public RabbitMqModule(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        protected override void Load(ContainerBuilder builder)
+        {
+            var connectionString = Configuration.GetValue<string>("squidex:eventPublishers:rabbitMq:connectionString");
+            var exchange = Configuration.GetValue<string>("squidex:eventPublishers:rabbitMq:exchange");
+            var enabled = Configuration.GetValue<bool>("squidex:eventPublishers:rabbitMq:enabled");
+
+            if (!string.IsNullOrWhiteSpace(connectionString) &&
+                !string.IsNullOrWhiteSpace(exchange) &&
+                enabled)
+            {
+                var streamFilter = Configuration.GetValue<string>("squidex:eventPublishers:rabbitMq:streamFilter");
+
+                builder.Register(c => new RabbitMqEventConsumer(connectionString, exchange, streamFilter))
+                    .As<IEventConsumer>()
+                    .As<IExternalSystem>()
+                    .SingleInstance();
+            }
+        }
+    }
+}

src/Squidex/Squidex.csproj

@@ -25,6 +25,7 @@
     <ProjectReference Include="..\Squidex.Events\Squidex.Events.csproj" />
     <ProjectReference Include="..\Squidex.Infrastructure\Squidex.Infrastructure.csproj" />
     <ProjectReference Include="..\Squidex.Infrastructure.MongoDb\Squidex.Infrastructure.MongoDb.csproj" />
+    <ProjectReference Include="..\Squidex.Infrastructure.RabbitMq\Squidex.Infrastructure.RabbitMq.csproj" />
     <ProjectReference Include="..\Squidex.Infrastructure.Redis\Squidex.Infrastructure.Redis.csproj" />
     <ProjectReference Include="..\Squidex.Read\Squidex.Read.csproj" />
     <ProjectReference Include="..\Squidex.Read.MongoDb\Squidex.Read.MongoDb.csproj" />

src/Squidex/Startup.cs

@@ -80,6 +80,7 @@ namespace Squidex
             builder.RegisterModule(new ClusterModule(Configuration));
             builder.RegisterModule(new EventStoreModule(Configuration));
             builder.RegisterModule(new InfrastructureModule(Configuration));
+            builder.RegisterModule(new RabbitMqModule(Configuration));
             builder.RegisterModule(new ReadModule(Configuration));
             builder.RegisterModule(new StoreModule(Configuration));
             builder.RegisterModule(new WebModule(Configuration));

src/Squidex/appsettings.json

@@ -19,6 +19,14 @@
         "databaseName": "Squidex"
       }
     },
+    "eventPublishers": {
+      "rabbitMq": {
+        "connectionString": "amqp://guest:guest@localhost/",
+        "exchange": "Squidex",
+        "enabled": false,
+        "streamFilter": "*"
+      } 
+    }, 
     "stores": {
       "type": "mongoDb",
       "mongoDb": {