Skip to content

Instantly share code, notes, and snippets.

@pierre3
Created November 14, 2015 02:36
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save pierre3/ab9952f609949bc2c988 to your computer and use it in GitHub Desktop.
using Microsoft.Diagnostics.Tracing;
using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.Management.Automation;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using System.Threading;
namespace EtwStream.PowerShell
{
[Cmdlet(VerbsCommon.Get, "TraceEventStream", DefaultParameterSetName = "nameOrGuid")]
public class GetTraceEvent : PSCmdlet
{
private CompositeDisposable disposable = new CompositeDisposable();
[ValidateSet(
nameof(WellKnownEventSources.AspNetEventSource),
nameof(WellKnownEventSources.ConcurrentCollectionsEventSource),
nameof(WellKnownEventSources.FrameworkEventSource),
nameof(WellKnownEventSources.PinnableBufferCacheEventSource),
nameof(WellKnownEventSources.PlinqEventSource),
nameof(WellKnownEventSources.SqlEventSource),
nameof(WellKnownEventSources.SynchronizationEventSource),
nameof(WellKnownEventSources.TplEventSource))]
[Parameter(Position = 0, ParameterSetName = "wellKnown", Mandatory = true)]
public string WellKnownEventSource { get; set; }
[Parameter(Position = 0, ParameterSetName = "nameOrGuid", Mandatory = true)]
public string NameOrGuid { get; set; }
[Parameter]
public SwitchParameter DumpWithColor { get; set; }
[Parameter]
public TraceEventLevel TraceLevel { get; set; } = TraceEventLevel.Verbose;
protected override void ProcessRecord()
{
IObservable<TraceEvent> listener = (ParameterSetName == "wellKnown")
? GetWellKnownEventListener(WellKnownEventSource)
: ObservableEventListener.FromTraceEvent(NameOrGuid);
var q = new BlockingCollection<Action>();
Exception exception = null;
var d = listener
.Where(x=> Process.GetCurrentProcess().Id != x.ProcessID)
.Where(x=>x.Level <= TraceLevel)
.Subscribe(
x =>
{
q.Add(() =>
{
var item = new PSTraceEvent(x, Host.UI);
if (DumpWithColor.IsPresent)
{
item.DumpWithColor();
}
else
{
WriteObject(item);
}
WriteVerbose(item.DumpPayloadOrMessage());
});
},
e =>
{
exception = e;
q.CompleteAdding();
}, q.CompleteAdding);
disposable.Add(d);
var cts = new CancellationTokenSource();
disposable.Add(new CancellationDisposable(cts));
foreach (var act in q.GetConsumingEnumerable(cts.Token))
{
act();
}
if (exception != null)
{
ThrowTerminatingError(new ErrorRecord(exception, "1", ErrorCategory.OperationStopped, null));
}
}
protected override void StopProcessing()
{
disposable.Dispose();
}
private IObservable<TraceEvent> GetWellKnownEventListener(string wellKnownEventSource)
{
switch (wellKnownEventSource)
{
case nameof(WellKnownEventSources.AspNetEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.AspNetEventSource);
case nameof(WellKnownEventSources.ConcurrentCollectionsEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.ConcurrentCollectionsEventSource);
case nameof(WellKnownEventSources.FrameworkEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.FrameworkEventSource);
case nameof(WellKnownEventSources.PinnableBufferCacheEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.PinnableBufferCacheEventSource);
case nameof(WellKnownEventSources.PlinqEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.PlinqEventSource);
case nameof(WellKnownEventSources.SqlEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.SqlEventSource);
case nameof(WellKnownEventSources.SynchronizationEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.SynchronizationEventSource);
case nameof(WellKnownEventSources.TplEventSource):
return ObservableEventListener.FromTraceEvent(WellKnownEventSources.TplEventSource);
default:
return Observable.Empty<TraceEvent>();
}
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment