Created
September 29, 2020 16:43
-
-
Save bent-rasmussen/e793912137bbfccbdc5dd6a97d5fd40b to your computer and use it in GitHub Desktop.
An logger experiment for C# using the dynamic language feature.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <Query Kind="Program"> | |
| <NuGetReference>Serilog</NuGetReference> | |
| <NuGetReference>Serilog.Sinks.LINQPad</NuGetReference> | |
| <Namespace>System.Dynamic</Namespace> | |
| <Namespace>Serilog</Namespace> | |
| </Query> | |
| // Just an experiment; you should probably never use this. :-) | |
| // Would be nicer with compile-time function creation but not possible atm afaik. | |
| void Main() | |
| { | |
| var lplogger = | |
| new LoggerConfiguration() | |
| .WriteTo.LINQPad() | |
| .CreateLogger(); | |
| dynamic logger = new DynamicLogger(lplogger); | |
| logger.StartedOperation1("Foo", "Bar", "Baz"); | |
| // Note: in linqpad you won't see the method names - but you should using other sinks. | |
| logger.StartedOperation2(hoo: "Foo", hey: "Bar", hum: "Baz"); | |
| } | |
| public class DynamicLogger : DynamicObject | |
| { | |
| public DynamicLogger(ILogger logger) | |
| { | |
| _logger = logger; | |
| } | |
| private readonly ILogger _logger; | |
| public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result) | |
| { | |
| //var str = $"{{method:l}}({String.Join(", ", binder.CallInfo.ArgumentNames.Select(argName => $"{{{argName}}}"))})"; | |
| var sb = new System.Text.StringBuilder(); | |
| sb.Append("{method:l}"); | |
| sb.Append("("); | |
| var first = true; | |
| var parameters = new object[args.Length + 1]; | |
| parameters[0] = binder.Name; | |
| var hasAllNames = binder.CallInfo.ArgumentNames.Count == binder.CallInfo.ArgumentCount; | |
| for (var i = 0; i < binder.CallInfo.ArgumentCount; i++) | |
| { | |
| var argName = hasAllNames ? binder.CallInfo.ArgumentNames[i] : $"arg{i}"; | |
| var arg = args[i]; | |
| if (first) | |
| first = false; | |
| else | |
| sb.Append(", "); | |
| sb.Append("{"); | |
| sb.Append(argName); | |
| sb.Append("}"); | |
| parameters[i + 1] = arg; | |
| } | |
| sb.Append(")"); | |
| _logger.Information(sb.ToString(), parameters); | |
| result = (object)null; | |
| return true; | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment