public void FilteredEventSourceTest()
{
const int _bufferSize = 10;
List <EventEntry> _lastEvent = new List <EventEntry>();
ObservableEventListener _listener = new ObservableEventListener();
IDisposable _subscription =
_listener.
FlushOnTrigger(entry => entry.Schema.Level <= EventLevel.Error, bufferSize: _bufferSize).
Subscribe(x => _lastEvent.Add(x));
using (SinkSubscription <ObservableEventListener> _sink = new SinkSubscription <ObservableEventListener>(_subscription, _listener))
{
_sink.Sink.EnableEvents(SemanticEventSource.Log, EventLevel.LogAlways, Keywords.All);
SemanticEventUser _logUser = new SemanticEventUser();
_logUser.LongDataProcessing();
Assert.AreEqual <int>(_bufferSize + 1, _lastEvent.Count);
}
}
static void UsingRxFiltering()
{
// Configure the observable listener.
var listener = new ObservableEventListener();
listener.EnableEvents(MyCompanyEventSource.Log, EventLevel.LogAlways, Keywords.All);
// Use the custom filter extension method (see the ObservableHelper class).
// If an message of level Error is received, send it and the two previous
// information messages to the console.
listener
.FlushOnTrigger(entry => entry.Schema.Level <= EventLevel.Error, bufferSize: 2)
.LogToConsole();
Console.WriteLine("Sending 20 informational messages and one error message.");
for (int i = 0; i < 20; i++)
{
MyCompanyEventSource.Log.DBQueryStart("select... (query #" + i);
}
MyCompanyEventSource.Log.DBQueryError(231);
Console.WriteLine("Only the last two information messages and the error message get sent to the console sink.");
listener.Dispose();
}
static void UsingRxFiltering()
{
// Configure the observable listener.
var listener = new ObservableEventListener();
listener.EnableEvents(MyCompanyEventSource.Log, EventLevel.LogAlways, Keywords.All);
// Use the custom filter extension method (see the ObservableHelper class).
// If an message of level Error is received, send it and the two previous
// information messages to the console.
listener
.FlushOnTrigger(entry => entry.Schema.Level <= EventLevel.Error, bufferSize: 2)
.LogToConsole();
Console.WriteLine("Sending 20 informational messages and one error message.");
for (int i = 0; i < 20; i++)
{
MyCompanyEventSource.Log.DBQueryStart("select... (query #" + i);
}
MyCompanyEventSource.Log.DBQueryError(231);
Console.WriteLine("Only the last two information messages and the error message get sent to the console sink.");
listener.Dispose();
}