Lucene.Net.Index.IndexWriter.FlushDocStores C# (CSharp) Method

		private bool FlushDocStores()
		{
			lock (this)
			{
                if (infoStream != null)
                {
                    Message("flushDocStores segment=" + docWriter.DocStoreSegment);
                }

				bool useCompoundDocStore = false;
                if (infoStream != null)
                {
                    Message("closeDocStores segment=" + docWriter.DocStoreSegment);
                }

				System.String docStoreSegment;
				
				bool success = false;
				try
				{
					docStoreSegment = docWriter.CloseDocStore();
					success = true;
				}
				finally
				{
					if (!success && infoStream != null)
					{
						Message("hit exception closing doc store segment");
					}
				}

                if (infoStream != null)
                {
                    Message("flushDocStores files=" + docWriter.ClosedFiles());
                }

				useCompoundDocStore = mergePolicy.UseCompoundDocStore(segmentInfos);
				
				if (useCompoundDocStore && docStoreSegment != null && docWriter.ClosedFiles().Count != 0)
				{
					// Now build compound doc store file
					
					if (infoStream != null)
					{
						Message("create compound file " + docStoreSegment + "." + IndexFileNames.COMPOUND_FILE_STORE_EXTENSION);
					}
					
					success = false;
					
					int numSegments = segmentInfos.Count;
					System.String compoundFileName = docStoreSegment + "." + IndexFileNames.COMPOUND_FILE_STORE_EXTENSION;
					
					try
					{
						CompoundFileWriter cfsWriter = new CompoundFileWriter(directory, compoundFileName);
						foreach(string file in docWriter.closedFiles)
						{
							cfsWriter.AddFile(file);
						}
						
						// Perform the merge
						cfsWriter.Close();
						success = true;
					}
					finally
					{
						if (!success)
						{
							if (infoStream != null)
								Message("hit exception building compound file doc store for segment " + docStoreSegment);
							deleter.DeleteFile(compoundFileName);
                            docWriter.Abort();
						}
					}
					
					for (int i = 0; i < numSegments; i++)
					{
						SegmentInfo si = segmentInfos.Info(i);
						if (si.DocStoreOffset != - 1 && si.DocStoreSegment.Equals(docStoreSegment))
							si.DocStoreIsCompoundFile = true;
					}
					
					Checkpoint();
					
					// In case the files we just merged into a CFS were
					// not previously checkpointed:
					deleter.DeleteNewFiles(docWriter.ClosedFiles());
				}
				
				return useCompoundDocStore;
			}
		}