/// <summary>
/// Processa os elementos que devem ser removidos do pesquisador.
/// </summary>
public void ProcessRemovedElements()
{
if (!_initialized)
{
Initialize();
}
lock (_processElementsLock)
{
Exception exception = null;
var startDate = DateTime.Now;
if (_repositoryLoader.CheckClearAllElements())
{
using (var writerAccess = CreateIndexWriter())
writerAccess.Writer.DeleteAll();
_repositoryLoader.ConfirmClearAllElements();
_dataRepository.Clear();
_newElementsCutoffDate = DateTime.MinValue;
}
else
{
IndexWriterAccess writerAccess = null;
try
{
foreach (var uid in _repositoryLoader.GetRemoved(_removedElementsCutoffDate))
{
try
{
if (writerAccess == null)
{
writerAccess = CreateIndexWriter();
}
writerAccess.Writer.DeleteDocuments(new Term("Uid", uid.ToString()));
_dataRepository.Remove(uid);
}
catch (Exception ex)
{
exception = ex;
}
}
}
finally
{
if (writerAccess != null)
{
writerAccess.Dispose();
}
}
}
if (exception != null)
{
throw exception;
}
_removedElementsCutoffDate = startDate;
}
}
/// <summary>
/// Cria o escritor para o indice.
/// </summary>
/// <returns></returns>
private IndexWriterAccess CreateIndexWriter()
{
_createWriterResetEvent.WaitOne();
_createWriterResetEvent.Reset();
var access = new IndexWriterAccess(new IndexWriter(IndexDirectory, new StandardAnalyzer(Version.LUCENE_29), !_writerCreated, IndexWriter.MaxFieldLength.LIMITED), _createWriterResetEvent);
_writerCreated = true;
access.Disposing += (sender, e) => {
if (_reader != null)
{
_reader.Close();
}
_reader = IndexReader.Open(IndexDirectory, false);
};
return(access);
}
/// <summary>
/// Processa os novos elementos que devem ser carregados para o pesquisador.
/// </summary>
public void ProcessNewElements()
{
if (!_initialized)
{
Initialize();
}
lock (_processElementsLock)
{
var startDate = DateTime.Now;
IndexWriterAccess writerAccess = null;
var analyzer = new StandardAnalyzer(Version.LUCENE_29, Stopwords.PORTUGUESE_SET);
var exceptionQueue = new Queue <Exception>();
IEnumerator <Element> elementsEnumerator = null;
try
{
try
{
elementsEnumerator = _repositoryLoader.GetElements(_newElementsCutoffDate).GetEnumerator();
}
catch (Exception ex)
{
throw new Exception(string.Format("Fail on get enumerator for elements from repository loader using date '{0}'", _newElementsCutoffDate.ToString()), ex);
}
while (true)
{
try
{
if (!elementsEnumerator.MoveNext())
{
break;
}
}
catch (Exception ex)
{
throw new Exception("Fail on get next elemento from elementsEnumerator", ex);
}
var element = elementsEnumerator.Current;
try
{
if (writerAccess == null)
{
writerAccess = CreateIndexWriter();
}
writerAccess.Writer.DeleteDocuments(new Term("Uid", element.Uid.ToString()));
AddElement(writerAccess.Writer, analyzer, element);
}
catch (Exception ex)
{
exceptionQueue.Enqueue(ex);
}
}
}
finally
{
if (elementsEnumerator != null)
{
elementsEnumerator.Dispose();
}
if (writerAccess != null)
{
writerAccess.Dispose();
}
}
if (exceptionQueue.Count > 0)
{
throw new SearchEngineAggregateException(string.Format("there were {0} exceptions, the first '{1}'", exceptionQueue.Count, exceptionQueue.Peek().Message), exceptionQueue);
}
_newElementsCutoffDate = startDate;
}
}
