SourceContext altered by calling .ForContext<T>() (or another overload) and using the object that fluent syntax yields to do the logging. i.e. var log = Log.ForContext<A>(); log.ForContext<B>().Information("Test") will have SourceContext=Test
serilog tag there. (I have never used text config or wanted a thread name in my log but there shoiuld be a plugin somewhere to Enrich.WithThreadContext if you google)
ILogSink and then .WriteTo.Sink(new MySink()) - best to start from an example; I bet searching up MessageBox Sink Serilog will yield something, or look at a simple sink like one that writes to Trace or Debug to get started
protected override void OnShutdown()
{
base.OnShutdown();
log.Information("Shutdown");
// EventLog.WriteEntry(DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss:fff") + " " + "Shutdown");
}
Console.WriteLine() directly for this kind of output - it's not really "logging" in this case, but if you want to pipe it through the sink you can filter it out from the file using WriteTo.Conditional() for the file, where the condition would need some way to exclude the animation events (perhaps according to their SourceContext property)
Hi
I'm using Serilog and am trying to use MariaDB sink. I have MySqlConnector package version 1.2.1 installed but get the following error from Selflog during startup:
Could not load type 'MySql.Data.MySqlClient.MySqlConnection' from assembly 'MySqlConnector, Version=1.0.0.0, Culture=natural, PublicKeyToken=d33d3e53aa5f8c92'
at Serilog.Sinks.MariaDB.SqlTableCreator.CreateTable()
What am I doing wrong? Can anyone help me? Serilog looks very very good so i very much would like to use it.
I'm using serilog and trying writeto.File(), reading configuration from appsettings.json file.. But the problem here is I need two log files based on the application name, since I will be using the serilog project as a utility based on the Assembly from which the application is running I should create respective files. I tried adding filters in json file for writeto tag there is no luck. Please help me in this.
{
"Serilog": {
"Using": [ "Serilog.Sinks.File" ],
"FilterSwitches": {
"$filterSwitch": "Application = 'GE.Opc.Ua.Client.Adaptor.Service'"},
"MinimumLevel": {
"Default": "Debug"
},
"WriteTo": [
{
"Name": "Logger",
"Args": {
"configureLogger": {
"Filter": [
{
"Name": "ByIncludingOnly",
"Args": {
"inclusionPredicate": {
"logEvent": {
"Properties": {
"Application": "GE.Opc.Ua.Client.Adaptor.Service"
}
}
}
}
}
],
"Enrich": [
"FromLogContext",
"WithMachineName",
{
"Name": "When",
"Args": {
"expression": "Application = 'GE.Opc.Ua.Client.Adaptor.Service'"
},
"configureEnricher": [ "WithMachineName", "FromLogContext", "WithThreadId" ]
}
],
"WriteTo": [
{
"Name": "File",
"Args": {
"path": "%TEMP%/Logs/AdaptorConfig2.txt",
"outputTemplate": "[{Timestamp:HH:mm:ss}] {SourceContext} [{Level}] {Message}{NewLine}{Exception}"
}
}
]
}
}
},
{
"Name": "Logger",
"Args": {
"configureLogger": {
"Filter": [
{
"Name": "ByIncludingOnly",
"Args": {
"inclusionPredicate": {
"logEvent": {
"Properties": {
"Application": "GE.Opc.Ua.Client.TestApp.Service"
}
}
}
}
}
],
"Enrich": [
"FromLogContext",
"WithMachineName",
{
"Name": "When",
"Args": {
"expression": "Application = 'GE.Opc.Ua.Client.TestApp.Service'"
},
"configureEnricher": [ "WithMachineName", "FromLogContext", "WithThreadId" ]
}
],
"WriteTo": [
{
"Name": "File",
"Args": {
"path": "%TEMP%/Logs/TestAppConfig2.txt",
"outputTemplate": "[{Timestamp:HH:mm:ss}] {SourceContext} [{Level}] {Message}{NewLine}{Exception}"
}
}
]
}
}
}
]
}
}
2 replies
LoggerConfiguration.ReadFrom.KeyValuePairs() use?is it like AppSettings(https://github.com/serilog/serilog/wiki/AppSettings)?
Hi,
Can you please advise, if there is a good way to change log file parameters, like size and retainedfilecount in runtime without re-creating the logger?
Something similar to the MinimumLevel.ControlledBy(LoggingLevelSwitch)?
I've posted question on stackoverflow - https://stackoverflow.com/questions/66598428/is-there-an-option-in-serilog-to-change-log-file-parameters-in-runtime-the-same
If it's not possible/feasible, can you elaborate as well?
Thanks,
Nick
I have a question - not sure where to ask:
I use Serilog to push logs to Elasticsearch and it seems there are two "kinds" of logs. Request logs produced by "UseSerilogRequestLogging(...)" and logs from the developers (when the explicitly want to log something). Is there a way to use different indexes (IndexFormat = "...") for each case?
Thank you!
@erotavlas best to ask on stackoverflow for max traffic - anyone that reads and answers here watches the serilog tag there too, plus a few million others ;) I'd suggest you still do that (it may even be answered; the closest thing I've seen I can think of is this answer [by me] https://stackoverflow.com/questions/50712720/pattern-to-use-serilog-pass-ilogger-vs-using-static-serilog-log)
In general, in a library, you can go one of two ways: require an ILogger to be passed, or assume the static one is initialized. For a truly generic library, you'll want to go the first way. However if you're coupling strongly to Serilog system wide anyway, it won't buy you much (in some testing scenarios, it can be valuable to be able to hook log outputs). That leaves what way you want to wire it between the host app and the library...
In general, you want the host startup to rig things; it's responsible for providing the environment that app code and lib can assume is present.
Using a container/DI to propagate the logger is not a panacea - its simply another way of flowing things around when you are passing ILogger explicitly (you can use it to wire in the SourceContext via a .ForContext per class, but that's about it)