static void Main(string[] args)
{
FileTarget target = new FileTarget();
target.Layout = "${longdate} ${logger} ${message}";
target.FileName = "${basedir}/logs/logfile.txt";
target.KeepFileOpen = false;
target.Encoding = "iso-8859-2";
AsyncTargetWrapper wrapper = new AsyncTargetWrapper();
wrapper.WrappedTarget = target;
wrapper.QueueLimit = 5000;
wrapper.OverflowAction = AsyncTargetWrapperOverflowAction.Discard;
NLog.Config.SimpleConfigurator.ConfigureForTargetLogging(wrapper, LogLevel.Debug);
Logger logger = LogManager.GetLogger("Example");
logger.Debug("log message");
wrapper.Flush();
}
public void FlushingMultipleTimesSimultaneous()
{
var asyncTarget = new AsyncTargetWrapper
{
TimeToSleepBetweenBatches = 2000,
WrappedTarget = new DebugTarget(),
};
asyncTarget.Initialize(null);
asyncTarget.WriteAsyncLogEvent(LogEventInfo.CreateNullEvent().WithContinuation(ex => { }));
var firstContinuationCalled = false;
var secondContinuationCalled = false;
var firstContinuationResetEvent = new ManualResetEvent(false);
var secondContinuationResetEvent = new ManualResetEvent(false);
asyncTarget.Flush(ex =>
{
firstContinuationCalled = true;
firstContinuationResetEvent.Set();
});
asyncTarget.Flush(ex =>
{
secondContinuationCalled = true;
secondContinuationResetEvent.Set();
});
firstContinuationResetEvent.WaitOne();
secondContinuationResetEvent.WaitOne();
Assert.True(firstContinuationCalled);
Assert.True(secondContinuationCalled);
}
public void AsyncTargetWrapperFlushTest()
{
var myTarget = new MyAsyncTarget
{
ThrowExceptions = true,
};
var targetWrapper = new AsyncTargetWrapper(myTarget)
{
OverflowAction = AsyncTargetWrapperOverflowAction.Grow,
};
targetWrapper.Initialize(null);
myTarget.Initialize(null);
List<Exception> exceptions = new List<Exception>();
int eventCount = 5000;
for (int i = 0; i < eventCount; ++i)
{
targetWrapper.WriteAsyncLogEvent(LogEventInfo.CreateNullEvent().WithContinuation(
ex =>
{
lock (exceptions)
{
exceptions.Add(ex);
}
}));
}
Exception lastException = null;
ManualResetEvent mre = new ManualResetEvent(false);
string internalLog = RunAndCaptureInternalLog(
() =>
{
targetWrapper.Flush(
cont =>
{
try
{
// by this time all continuations should be completed
Assert.Equal(eventCount, exceptions.Count);
// with just 1 flush of the target
Assert.Equal(1, myTarget.FlushCount);
// and all writes should be accounted for
Assert.Equal(eventCount, myTarget.WriteCount);
}
catch (Exception ex)
{
lastException = ex;
}
finally
{
mre.Set();
}
});
Assert.True(mre.WaitOne());
},
LogLevel.Trace);
if (lastException != null)
{
Assert.True(false, lastException.ToString() + "\r\n" + internalLog);
}
}
public void AsyncTargetWrapperSyncTest_WhenTimeToSleepBetweenBatchesIsEqualToZero()
{
LogManager.ThrowConfigExceptions = true;
var myTarget = new MyTarget();
var targetWrapper = new AsyncTargetWrapper() {
WrappedTarget = myTarget,
TimeToSleepBetweenBatches = 0,
BatchSize = 4,
QueueLimit = 2, // Will make it "sleep" between every second write
OverflowAction = AsyncTargetWrapperOverflowAction.Block
};
targetWrapper.Initialize(null);
myTarget.Initialize(null);
try
{
int flushCounter = 0;
AsyncContinuation flushHandler = (ex) => { ++flushCounter; };
List<KeyValuePair<LogEventInfo, AsyncContinuation>> itemPrepareList = new List<KeyValuePair<LogEventInfo, AsyncContinuation>>(2500);
List<int> itemWrittenList = new List<int>(itemPrepareList.Capacity);
for (int i = 0; i< itemPrepareList.Capacity; ++i)
{
var logEvent = new LogEventInfo();
int sequenceID = logEvent.SequenceID;
itemPrepareList.Add(new KeyValuePair<LogEventInfo, AsyncContinuation>(logEvent, (ex) => itemWrittenList.Add(sequenceID)));
}
long startTicks = Environment.TickCount;
for (int i = 0; i < itemPrepareList.Count; ++i)
{
var logEvent = itemPrepareList[i].Key;
targetWrapper.WriteAsyncLogEvent(logEvent.WithContinuation(itemPrepareList[i].Value));
}
targetWrapper.Flush(flushHandler);
for (int i = 0; i < itemPrepareList.Count * 2 && itemWrittenList.Count != itemPrepareList.Count; ++i)
System.Threading.Thread.Sleep(1);
long elapsedMilliseconds = Environment.TickCount - startTicks;
Assert.Equal(itemPrepareList.Count, itemWrittenList.Count);
int prevSequenceID = 0;
for (int i = 0; i < itemWrittenList.Count; ++i)
{
Assert.True(prevSequenceID < itemWrittenList[i]);
prevSequenceID = itemWrittenList[i];
}
#if MONO || NET3_5
Assert.True(elapsedMilliseconds < 2500); // Skip timing test when running within OpenCover.Console.exe
#endif
targetWrapper.Flush(flushHandler);
for (int i = 0; i < 2000 && flushCounter != 2; ++i)
System.Threading.Thread.Sleep(1);
Assert.Equal(2, flushCounter);
}
finally
{
myTarget.Close();
targetWrapper.Close();
}
}