protected virtual Page <T> AddPage()
{
using (_pageHeaders.EnterWriteScope()) {
Page <T> newPage;
if (!_pageHeaders.Any())
{
newPage = Page <T> .First;
}
else
{
var lastPage = _pageHeaders.Last();
newPage = new Page <T>(lastPage.PageNumber + 1, lastPage.EndIndex + 1);
}
_pageHeaders.Add(newPage);
return(newPage);
}
}
public void Run(Stream input, Stream output)
{
if (_blockingStreams == null)
{
throw new ObjectDisposedException(GetType().Name);
}
if (input == null)
{
throw new ArgumentNullException("input");
}
if (!input.CanRead)
{
throw new ArgumentException("input");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (!output.CanWrite)
{
throw new ArgumentException("output");
}
var errors = new SynchronizedList <Exception>();
ThreadStart lastStage = null;
for (var i = 0; i < _filters.Length; i++)
{
var stageInput = i == 0 ? input : _blockingStreams[i - 1];
var stageOutput =
i == _filters.Length - 1 ? output : _blockingStreams[i];
var filter = _filters[i];
ThreadStart stage = delegate {
try {
filter(stageInput, stageOutput);
var blockingStream = stageOutput as BlockingStream;
if (blockingStream != null)
{
blockingStream.SetEndOfStream();
}
} catch (Exception error) {
errors.Add(error);
var blockingStream = stageOutput as BlockingStream;
if (blockingStream != null)
{
blockingStream.SetEndOfStreamDueToFailure();
}
}
};
if (i < _filters.Length - 1)
{
var t = new Thread(stage)
{
IsBackground = true
};
t.Start();
}
else
{
lastStage = stage;
}
}
if (!errors.Any())
{
try {
lastStage();
} catch (Exception error) {
errors.Add(error);
}
}
if (errors.Any())
{
throw new AggregateException(errors);
}
}
