public void TestNoData()
{
var buffer = new PagedLogBuffer(1024, 10, Core.Columns.RawContent);
buffer.ResizeTo(12);
var destination = new LogBufferArray(12, PageBufferedLogSource.RetrievalState, Core.Columns.RawContent);
destination[0].RawContent = "Foo";
destination[1].RawContent = "Bar";
destination[10].RawContent = "Big Smoke";
destination[11].RawContent = "Sup";
buffer.TryGetEntries(new LogSourceSection(0, 10), destination, 1).Should().BeFalse("because the cache is completely empty and thus no data should have been retrieved");
destination[0].RawContent.Should()
.Be("Foo",
"because only the data from the specified offset onward may have been overwritten");
for (int i = 1; i < 11; ++i)
{
destination[i].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotCached);
destination[i].RawContent.Should().Be(Core.Columns.RawContent.DefaultValue,
"because when the region couldn't be read from the cache, then it should have been defaulted");
}
destination[11].RawContent.Should().Be("Sup");
}
public void TestRequestPartiallyCached_Segmented_ReadFromTwoPages()
{
var buffer = new PagedLogBuffer(1024, 10, Core.Columns.RawContent);
buffer.ResizeTo(12);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent)
{
new LogEntry(),
new LogEntry {
RawContent = "Dina",
},
new LogEntry {
RawContent = "Jesse"
}
};
buffer.TryAdd(new LogSourceSection(7, 2), data, 1);
var destination = new LogBufferArray(11, Core.Columns.Index, Core.Columns.RawContent);
buffer.TryGetEntries(new LogSourceSection(4, 5), destination, 6).Should().BeFalse("because we managed to only retrieve the data partially");
for (int i = 6; i < 9; ++i)
{
destination[i].Index.Should().Be(Core.Columns.Index.DefaultValue);
destination[i].RawContent.Should().Be(Core.Columns.RawContent.DefaultValue);
}
destination[9].Index.Should().Be(7);
destination[9].RawContent.Should().Be("Dina");
destination[10].Index.Should().Be(8);
destination[10].RawContent.Should().Be("Jesse");
}
public void TestCopyFromUnknownColumn()
{
var buffer = new LogBufferArray(2, Core.Columns.Timestamp);
new Action(() => buffer.CopyFrom(Core.Columns.RawContent, 0, new string[0], 0, 0))
.Should().Throw <NoSuchColumnException>();
}
public void TestTryGetEntries_DestinationTooSmall()
{
var buffer = new PagedLogBuffer(4, 2, Core.Columns.RawContent);
buffer.ResizeTo(4);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent)
{
new LogEntry {
RawContent = "A"
},
new LogEntry {
RawContent = "B"
},
new LogEntry {
RawContent = "C"
},
new LogEntry {
RawContent = "D"
}
};
buffer.TryAdd(new LogSourceSection(0, 8), data, 0);
var destination = new LogBufferArray(2, Core.Columns.Index, Core.Columns.RawContent);
destination[0].RawContent = "1";
destination[1].RawContent = "2";
new Action(() => buffer.TryGetEntries(new LogSourceSection(0, 2), destination, 1))
.Should().Throw <ArgumentException>("because the destination is too small");
destination[0].RawContent.Should().Be("1", "because the original data may not have been overwritten");
destination[1].RawContent.Should().Be("2", "because the original data may not have been overwritten");
}
public void Export(IProgress <Percentage> progressReporter = null)
{
const int bufferSize = 1000;
var buffer = new LogBufferArray(bufferSize, Columns.Index, Columns.RawContent);
var count = _logSource.GetProperty(Properties.LogEntryCount);
var index = 0;
using (var writer = new StreamWriter(_stream, Encoding.UTF8, 1024, true))
{
while (index < count)
{
var remaining = count - index;
if (remaining > bufferSize)
{
remaining = bufferSize;
}
if (!ExportPortion(writer, buffer, index, remaining))
{
break;
}
index += remaining;
var progress = Percentage.Of(index, count);
progressReporter?.Report(progress);
}
}
}
private bool ExportPortion(StreamWriter writer, LogBufferArray array, int index, int count)
{
try
{
_logSource.GetEntries(new LogSourceSection(index, count), array);
for (var i = 0; i < count; ++i)
{
if (_written)
{
writer.WriteLine();
}
var logLine = array[i];
if (logLine.Index == LogLineIndex.Invalid) //< EOF
{
break;
}
writer.Write(logLine.RawContent);
_written = true;
}
return(true);
}
catch (IndexOutOfRangeException)
{
// The file has been invalidated and reduced in size already.
// That's okay and we can end this export....
return(false);
}
}
public void TestCopyFromNullColumn()
{
var buffer = new LogBufferArray(2, Core.Columns.Timestamp);
new Action(() => buffer.CopyFrom(null, 0, new string[0], 0, 0))
.Should().Throw <ArgumentNullException>();
}
public PresentationLogSource(ITaskScheduler scheduler, ILogSource source, TimeSpan maximumWaitTime, TextSettings textSettings)
: base(scheduler)
{
if (scheduler == null)
{
throw new ArgumentNullException(nameof(scheduler));
}
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
_maximumWaitTime = maximumWaitTime;
_textSettings = textSettings;
_source = source;
_indices = new LogBufferList(IndexedColumns);
_array = new LogBufferArray(MaximumLineCount, Core.Columns.RawContent);
_pendingModifications = new ConcurrentQueue <PendingModification>();
_syncRoot = new object();
_source.AddListener(this, _maximumWaitTime, MaximumLineCount);
StartTask();
}
public LogSourceSearch(ITaskScheduler taskScheduler, ILogSource logSource, string searchTerm, TimeSpan maximumWaitTime)
{
if (taskScheduler == null)
{
throw new ArgumentNullException(nameof(taskScheduler));
}
if (logSource == null)
{
throw new ArgumentNullException(nameof(logSource));
}
if (string.IsNullOrEmpty(searchTerm))
{
throw new ArgumentException("searchTerm may not be empty");
}
_logSource = logSource;
_filter = new SubstringFilter(searchTerm, true);
_matches = new List <LogMatch>();
_syncRoot = new object();
_listeners = new LogFileSearchListenerCollection(this);
_pendingModifications = new ConcurrentQueue <LogSourceModification>();
_scheduler = taskScheduler;
const int maximumLineCount = 1000;
_maximumWaitTime = maximumWaitTime;
_logLinesArray = new LogBufferArray(maximumLineCount, Columns.Index, Columns.RawContent);
_matchesBuffer = new List <LogLineMatch>();
_logSource.AddListener(this, _maximumWaitTime, maximumLineCount);
_task = _scheduler.StartPeriodic(FilterAllPending,
TimeSpan.FromMilliseconds(100),
string.Format("Search {0}", logSource));
}
protected override IReadOnlyLogEntry CreateEmpty()
{
// TODO: Swap
var buffer = new LogBufferArray(1);
return(buffer[0]);
}
protected override IReadOnlyLogEntry CreateDefault()
{
// TODO: Swap
var buffer = new LogBufferArray(1, Core.Columns.Minimum);
return(buffer[0]);
}
public void TestPrefetchAsyncBatch()
{
var pageSize = 100;
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero, pageSize: pageSize);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromCache | LogSourceQueryMode.FetchForLater);
buffer.OnLogFileModified(_source.Object, LogSourceModification.Appended(0, 10));
var section1ToQuery = new LogSourceSection(2, 4);
buffer.GetEntries(section1ToQuery, destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "Because we didn't allow data to be retrieved on the calling thread");
var section2ToQuery = new LogSourceSection(7, 3);
buffer.GetEntries(section2ToQuery, destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "Because we didn't allow data to be retrieved on the calling thread");
_taskScheduler.RunOnce();
_source.Verify(x => x.GetEntries(new LogSourceSection(0, pageSize), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Once, "Because the buffer should avoid reading the same data for the same page multiple times in a row");
}
public void TestRequestFullyCached_Contiguous_ReadFromMultiplePages()
{
var buffer = new PagedLogBuffer(1024, 10, Core.Columns.RawContent);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent);
for (int i = 0; i < 5 * 1024; ++i)
{
data.Add(new LogEntry {
Index = i, RawContent = i.ToString()
});
}
buffer.ResizeTo(data.Count);
buffer.TryAdd(new LogSourceSection(0, data.Count), data, 0);
var destination = new LogBufferArray(2048, Core.Columns.Index, Core.Columns.RawContent);
var readOffset = 1024;
buffer.TryGetEntries(new LogSourceSection(readOffset, destination.Count), destination, 0).Should().BeTrue("because all requested data is part of the cache");
for (int i = 0; i < destination.Count; ++i)
{
var logEntry = destination[i];
logEntry.Index.Should().Be(readOffset + i);
logEntry.RawContent.Should().Be((readOffset + i).ToString());
}
}
public void TestRetrieveFromPartiallyFilledPage_CreatedBeforeResize()
{
var buffer = new PagedLogBuffer(10, 1, Core.Columns.RawContent);
buffer.ResizeTo(2);
var data = new LogBufferList(Core.Columns.RawContent)
{
new LogEntry {
RawContent = "A"
},
new LogEntry {
RawContent = "B"
}
};
buffer.TryAdd(new LogSourceSection(0, 2), data, 0);
buffer.ResizeTo(4);
var destination = new LogBufferArray(6, PageBufferedLogSource.RetrievalState, Core.Columns.RawContent);
buffer.TryGetEntries(new LogSourceSection(0, 6), destination, 0).Should().BeFalse("because the cache is only partially filled");
destination[0].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.Retrieved);
destination[1].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.Retrieved);
destination[2].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotCached);
destination[3].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotCached);
destination[4].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotInSource);
destination[5].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotInSource);
}
public void TestConstruction2([Values(1, 2, 5, 10, 42, 100, 9001)] int count)
{
var buffer = new LogBufferArray(count);
buffer.Columns.Should().BeEmpty();
buffer.Count.Should().Be(count);
buffer.Should().HaveCount(count);
}
public void TestCopyFrom()
{
var buffer = new LogBufferArray(1, Core.Columns.Timestamp);
var timestamp = new DateTime(2017, 12, 11, 21, 41, 0);
buffer.CopyFrom(Core.Columns.Timestamp, new DateTime?[] { timestamp });
buffer[0].Timestamp.Should().Be(timestamp, "Because we've just copied this timestamp to the buffer");
}
public void TestGetEntryByIndex1([Values(-1, 0, 1)] int invalidIndex)
{
var buffer = new LogBufferArray(0);
new Action(() =>
{
var unused = buffer[invalidIndex];
}).Should().Throw <IndexOutOfRangeException>();
}
public void TestIgnoreDataOutOfBounds()
{
var buffer = new PagedLogBuffer(4, 2, Core.Columns.RawContent);
buffer.ResizeTo(4);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent)
{
new LogEntry {
RawContent = "A"
},
new LogEntry {
RawContent = "B"
},
new LogEntry {
RawContent = "C"
},
new LogEntry {
RawContent = "D"
},
new LogEntry {
RawContent = "E"
},
new LogEntry {
RawContent = "F"
},
new LogEntry {
RawContent = "G"
},
new LogEntry {
RawContent = "H"
},
};
buffer.TryAdd(new LogSourceSection(0, 8), data, 0);
var destination = new LogBufferArray(8, Core.Columns.Index, PageBufferedLogSource.RetrievalState, Core.Columns.RawContent);
buffer.TryGetEntries(new LogSourceSection(0, 8), destination, 0).Should().BeFalse("because even though we've tried to add 8 elements to the buffer, only the first 4 are part of the entire log file section and thus the others should have been ignored");
destination[0].RawContent.Should().Be("A");
destination[1].RawContent.Should().Be("B");
destination[2].RawContent.Should().Be("C");
destination[3].RawContent.Should().Be("D");
for (int i = 0; i < 4; ++i)
{
destination[i].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.Retrieved);
}
for (int i = 4; i < 8; ++i)
{
destination[i].RawContent.Should().Be(Core.Columns.RawContent.DefaultValue);
destination[i].GetValue(PageBufferedLogSource.RetrievalState).Should().Be(RetrievalState.NotInSource);
}
}
public void TestCopyFromPartial3()
{
var buffer = new LogBufferArray(2, Core.Columns.Timestamp);
var timestamp = new DateTime(2017, 12, 11, 21, 41, 0);
buffer.CopyFrom(Core.Columns.Timestamp, 1, new DateTime?[] { timestamp }, 0, 1);
buffer[0].Timestamp.Should().BeNull("because we didn't copy any data for this timestamp");
buffer[1].Timestamp.Should().Be(timestamp, "Because we've just copied this timestamp to the buffer");
}
public void TestSkipSourceIfNotAllowed()
{
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromCache);
buffer.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "because we didn't allow the data to be retrieved from the source under any circumstances");
}
public void TestConstruction3([Values(1, 2, 5, 10, 42, 100, 9001)] int count)
{
var buffer = new LogBufferArray(count, new List <IColumnDescriptor> {
Core.Columns.RawContent, Core.Columns.DeltaTime
});
buffer.Columns.Should().Equal(new object[] { Core.Columns.RawContent, Core.Columns.DeltaTime });
buffer.Count.Should().Be(count);
buffer.Should().HaveCount(count);
}
public void TestFetchFromSourceWhenNotAllowedFromCache()
{
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromSource);
buffer.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions),
Times.Once);
}
public void TestCopyFromManyRows()
{
const int count = 1000;
var buffer = new LogBufferArray(count, Core.Columns.OriginalIndex);
buffer.CopyFrom(Core.Columns.OriginalIndex, Enumerable.Range(0, count).Select(i => (LogLineIndex)i).ToArray());
for (int i = 0; i < count; ++i)
{
buffer[i].OriginalIndex.Should().Be(i);
}
}
public void TestCopyFromOverwrite()
{
var buffer = new LogBufferArray(2, Core.Columns.RawContent);
buffer[0].RawContent.Should().BeNull();
buffer[1].RawContent.Should().BeNull();
buffer.CopyFrom(Core.Columns.RawContent, new [] { "foo", "bar" });
buffer[0].RawContent.Should().Be("foo");
buffer[1].RawContent.Should().Be("bar");
}
public void TestContainsColumn()
{
var buffer = new LogBufferArray(42, new IColumnDescriptor[] { Core.Columns.LogLevel, Core.Columns.Index, Core.Columns.RawContent });
buffer.Contains(Core.Columns.LogLevel).Should().BeTrue();
buffer.Contains(Core.Columns.Index).Should().BeTrue();
buffer.Contains(Core.Columns.RawContent).Should().BeTrue();
buffer.Contains(Core.Columns.Message).Should().BeFalse();
buffer.Contains(Core.Columns.OriginalLineNumber).Should().BeFalse();
buffer.Contains(Core.Columns.DeltaTime).Should().BeFalse();
}
public void TestAccessUnavailableColumn()
{
var buffer = new LogBufferArray(1);
new Action(() => { var unused = buffer[0].RawContent; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].Index; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].OriginalIndex; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].LineNumber; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].OriginalLineNumber; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].Timestamp; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].ElapsedTime; }).Should().Throw <ColumnNotRetrievedException>();
new Action(() => { var unused = buffer[0].DeltaTime; }).Should().Throw <ColumnNotRetrievedException>();
}
public void TestFillInvalidLength()
{
var buffer = new LogBufferArray(10, Core.Columns.LineNumber);
buffer.Fill(Core.Columns.LineNumber, 42, 0, 10);
new Action(() => buffer.Fill(Core.Columns.LineNumber, 9001, 0, 11))
.Should().Throw <ArgumentException>();
for (int i = 0; i < 10; ++i)
{
buffer[i].LineNumber.Should().Be(42, "because nothing may have been overwritten");
}
}
public void TestReadPreviouslyInvalidatedButNowAvailableRegions_PartialPageEviction()
{
var buffer = new PagedLogBuffer(4, 2, Core.Columns.RawContent);
buffer.ResizeTo(16);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent)
{
new LogEntry {
RawContent = "A"
},
new LogEntry {
RawContent = "B"
},
new LogEntry {
RawContent = "C"
},
new LogEntry {
RawContent = "D"
},
new LogEntry {
RawContent = "E"
},
new LogEntry {
RawContent = "F"
},
new LogEntry {
RawContent = "G"
},
new LogEntry {
RawContent = "H"
},
};
buffer.TryAdd(new LogSourceSection(0, 8), data, 0);
buffer.ResizeTo(6);
buffer.ResizeTo(8);
var destination = new LogBufferArray(8, Core.Columns.Index, Core.Columns.RawContent);
buffer.TryGetEntries(new LogSourceSection(0, 8), destination, 0).Should().BeFalse("because the data has been partially invalidated");
destination[0].RawContent.Should().Be("A");
destination[1].RawContent.Should().Be("B");
destination[2].RawContent.Should().Be("C");
destination[3].RawContent.Should().Be("D");
destination[4].RawContent.Should().Be("E");
destination[5].RawContent.Should().Be("F");
destination[6].RawContent.Should().Be(Core.Columns.RawContent.DefaultValue, "because this row has been invalidated when the log source was downsized");
destination[7].RawContent.Should().Be(Core.Columns.RawContent.DefaultValue, "because this row has been invalidated when the log source was downsized");
}
public void TestRequestFullyCached_Contiguous()
{
var buffer = new PagedLogBuffer(1024, 10, Core.Columns.RawContent);
buffer.ResizeTo(12);
var data = new LogBufferList(Core.Columns.Index, Core.Columns.RawContent)
{
new LogEntry {
Index = 2, RawContent = "Scrambled Data",
},
new LogEntry {
Index = 3, RawContent = "This is awesome"
},
new LogEntry {
Index = 4, RawContent = "Yup"
},
new LogEntry {
Index = 5, RawContent = "Twist!"
},
new LogEntry {
Index = 10, RawContent = "I shouldn't be cached"
}
};
buffer.TryAdd(new LogSourceSection(3, 3), data, 1);
var destination = new LogBufferArray(5, Core.Columns.Index, Core.Columns.RawContent);
destination[0].Index = 32;
destination[0].RawContent = "Foo";
destination[1].Index = 42;
destination[1].RawContent = "Bar";
destination[4].Index = 9001;
destination[4].RawContent = "His power level is over 9000!";
buffer.TryGetEntries(new LogSourceSection(3, 2), destination, 2).Should().BeTrue();
destination[0].Index.Should().Be(32, "because we specified an offset and the data before it should not have been overwritten");
destination[0].RawContent.Should().Be("Foo", "because we specified an offset and the data before it should not have been overwritten");
destination[1].Index.Should().Be(42, "because we specified an offset and the data before it should not have been overwritten");
destination[1].RawContent.Should().Be("Bar", "because we specified an offset and the data before it should not have been overwritten");
destination[2].Index.Should().Be(data[1].Index);
destination[2].RawContent.Should().Be(data[1].RawContent);
destination[3].Index.Should().Be(data[2].Index);
destination[3].RawContent.Should().Be(data[2].RawContent);
destination[4].Index.Should().Be(9001, "because the data after the requested region shouldn't have been overwritten");
destination[4].RawContent.Should().Be("His power level is over 9000!", "because the data after the requested region shouldn't have been overwritten");
}
public void TestCopyFromMultipleColumns()
{
var buffer = new LogBufferArray(2,
Core.Columns.Index,
Core.Columns.Timestamp);
buffer.CopyFrom(Core.Columns.Index, new LogLineIndex[] { 1, 42 });
buffer.CopyFrom(Core.Columns.Timestamp, new DateTime?[] { DateTime.MinValue, DateTime.MaxValue });
buffer[0].Index.Should().Be(1);
buffer[0].Timestamp.Should().Be(DateTime.MinValue);
buffer[1].Index.Should().Be(42);
buffer[1].Timestamp.Should().Be(DateTime.MaxValue);
}
