File Channel

.dockerignore

@@ -20,3 +20,5 @@
 
 # Scripts (should be copied from node_modules on build)
 **/wwwroot/scripts/**/*.*
+
+**/src/Squidex/appsettings.Development.json

.gitignore

@@ -18,3 +18,5 @@ node_modules/
 
 # Scripts (should be copied from node_modules on build)
 **/wwwroot/scripts/**/*.*
+
+/src/Squidex/appsettings.Development.json

src/Squidex.Infrastructure/Log/ApplicationInfoLogAppender.cs

@@ -17,20 +17,26 @@ namespace Squidex.Infrastructure.Log
         private readonly string applicationVersion;
         private readonly string applicationSessionId;
 
-        public ApplicationInfoLogAppender(Assembly assembly)
+        public ApplicationInfoLogAppender(Type type, Guid applicationSession)
+            : this(type?.GetTypeInfo().Assembly, applicationSession)
+        {
+        }
+
+        public ApplicationInfoLogAppender(Assembly assembly, Guid applicationSession)
         {
             Guard.NotNull(assembly, nameof(assembly));
 
             applicationName = assembly.GetName().Name;
             applicationVersion = assembly.GetName().Version.ToString();
-            applicationSessionId = Guid.NewGuid().ToString();
+            applicationSessionId = applicationSession.ToString();
         }
 
         public void Append(IObjectWriter writer)
         {
-            writer.WriteProperty("appName", applicationName);
-            writer.WriteProperty("appVersion", applicationVersion);
-            writer.WriteProperty("appSessionId", applicationSessionId);
+            writer.WriteObject("app", w => w
+                .WriteProperty("name", applicationName)
+                .WriteProperty("version", applicationVersion)
+                .WriteProperty("sessionId", applicationSessionId));
         }
     }
 }

src/Squidex.Infrastructure/Log/FileChannel.cs

@@ -0,0 +1,34 @@
+// ==========================================================================
+//  FileChannel.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using Squidex.Infrastructure.Log.Internal;
+
+namespace Squidex.Infrastructure.Log
+{
+    public sealed class FileChannel : ILogChannel, IExternalSystem
+    {
+        private readonly FileLogProcessor processor;
+
+        public FileChannel(string path)
+        {
+            Guard.NotNullOrEmpty(path, nameof(path));
+
+            processor = new FileLogProcessor(path);
+        }
+
+        public void Log(SemanticLogLevel logLevel, string message)
+        {
+            processor.EnqueueMessage(new LogMessageEntry { Message = message, Level = logLevel });
+        }
+
+        public void Connect()
+        {
+            processor.Connect();
+        }
+    }
+}

src/Squidex.Infrastructure/Log/Internal/FileLogChannel.cs

@@ -0,0 +1,95 @@
+// ==========================================================================
+//  FileLogChannel.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System;
+using System.Collections.Concurrent;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Squidex.Infrastructure.Log.Internal
+{
+    public class FileLogProcessor : IDisposable
+    {
+        private const int MaxQueuedMessages = 1024;
+        private const int Retries = 10;
+        private readonly BlockingCollection<LogMessageEntry> messageQueue = new BlockingCollection<LogMessageEntry>(MaxQueuedMessages);
+        private readonly Task outputTask;
+        private readonly string path;
+
+        public FileLogProcessor(string path)
+        {
+            this.path = path;
+
+            outputTask = Task.Factory.StartNew(ProcessLogQueue, this, TaskCreationOptions.LongRunning);
+        }
+
+        public void Connect()
+        {
+            var fileInfo = new FileInfo(path);
+
+            if (!fileInfo.Directory.Exists)
+            {
+                throw new ConfigurationException($"Log directory '{fileInfo.Directory.FullName}' does not exist.");
+            }
+        }
+
+        public void EnqueueMessage(LogMessageEntry message)
+        {
+            messageQueue.Add(message);
+        }
+
+        private async Task ProcessLogQueue()
+        {
+            foreach (var entry in messageQueue.GetConsumingEnumerable())
+            {
+                for (var i = 1; i <= Retries; i++)
+                {
+                    try
+                    {
+                        File.AppendAllText(path, entry.Message + Environment.NewLine, Encoding.UTF8);
+
+                        break;
+                    }
+                    catch (Exception ex)
+                    {
+                        await Task.Delay(i * 10);
+
+                        if (i == Retries)
+                        {
+                            Console.WriteLine("Failed to write to log file '{0}': {1}", path, ex);
+                        }
+                    }
+                }
+            }
+        }
+
+        private static Task ProcessLogQueue(object state)
+        {
+            var processor = (FileLogProcessor)state;
+
+            return processor.ProcessLogQueue();
+        }
+
+        public void Dispose()
+        {
+            messageQueue.CompleteAdding();
+
+            try
+            {
+                outputTask.Wait(1500);
+            }
+            catch (TaskCanceledException)
+            {
+            }
+            catch (AggregateException ex) when (ex.InnerExceptions.Count == 1 && ex.InnerExceptions[0] is TaskCanceledException)
+            {
+            }
+        }
+    }
+}

src/Squidex.Infrastructure/Log/TimestampLogAppender.cs

@@ -12,14 +12,14 @@ namespace Squidex.Infrastructure.Log
 {
     public sealed class TimestampLogAppender : ILogAppender
     {
-        private readonly Func<long> timestamp;
+        private readonly Func<DateTime> timestamp;
 
         public TimestampLogAppender()
-            : this(() => DateTimeOffset.UtcNow.ToUnixTimeSeconds())
+            : this(() => DateTime.UtcNow)
         {
         }
 
-        public TimestampLogAppender(Func<long> timestamp)
+        public TimestampLogAppender(Func<DateTime> timestamp)
         {
             Guard.NotNull(timestamp, nameof(timestamp));
 

src/Squidex/Config/Domain/InfrastructureModule.cs

@@ -23,7 +23,6 @@ using Squidex.Infrastructure.CQRS.Commands;
 using Squidex.Infrastructure.CQRS.Events;
 using Squidex.Infrastructure.Log;
 using Squidex.Pipeline;
-using IntrospectionExtensions = System.Reflection.IntrospectionExtensions;
 
 // ReSharper disable UnusedAutoPropertyAccessor.Local
 
@@ -53,7 +52,17 @@ namespace Squidex.Config.Domain
                     .SingleInstance();
             }
 
-            builder.Register(c => new ApplicationInfoLogAppender(IntrospectionExtensions.GetTypeInfo(typeof(InfrastructureModule)).Assembly))
+            var logFile = Configuration.GetValue<string>("squidex:logging:file");
+
+            if (!string.IsNullOrWhiteSpace(logFile))
+            {
+                builder.RegisterInstance(new FileChannel(logFile))
+                    .As<ILogChannel>()
+                    .As<IExternalSystem>()
+                    .SingleInstance();
+            }
+
+            builder.Register(c => new ApplicationInfoLogAppender(GetType(), Guid.NewGuid()))
                 .As<ILogAppender>()
                 .SingleInstance();
 

src/Squidex/appsettings.json

@@ -4,7 +4,7 @@
       "baseUrl": "http://localhost:5000"
     },
     "logging": {
-      "human": true 
+      "human": false 
     },
     "clusterer": {
       "type": "none",

tests/Squidex.Infrastructure.Tests/Log/SemanticLogTests.cs

@@ -45,14 +45,16 @@ namespace Squidex.Infrastructure.Log
         [Fact]
         public void Should_log_timestamp()
         {
-            appenders.Add(new TimestampLogAppender(() => 1500));
+            var now = DateTime.UtcNow;
+
+            appenders.Add(new TimestampLogAppender(() => now));
 
             Log.LogFatal(w => {});
 
             var expected = 
                 MakeTestCall(w => w
                     .WriteProperty("logLevel", "Fatal")
-                    .WriteProperty("timestamp", 1500));
+                    .WriteProperty("timestamp", now));
 
             Assert.Equal(expected, output);
         }
@@ -75,15 +77,19 @@ namespace Squidex.Infrastructure.Log
         [Fact]
         public void Should_log_application_info()
         {
-            appenders.Add(new ApplicationInfoLogAppender(GetType().GetTypeInfo().Assembly));
+            var sessionId = Guid.NewGuid();
+
+            appenders.Add(new ApplicationInfoLogAppender(GetType(), sessionId));
 
             Log.LogFatal(m => { });
 
             var expected =
                 MakeTestCall(w => w
                     .WriteProperty("logLevel", "Fatal")
-                    .WriteProperty("applicationName", "Squidex.Infrastructure.Tests")
-                    .WriteProperty("applicationVersion", "1.0.0.0"));
+                    .WriteObject("app", a => a
+                        .WriteProperty("name", "Squidex.Infrastructure.Tests")
+                        .WriteProperty("version", "1.0.0.0")
+                        .WriteProperty("sessionId", sessionId.ToString())));
 
             Assert.Equal(expected, output);
         }