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

		public /*protected internal*/ void  Flush(bool triggerMerge, bool flushDocStores, bool flushDeletes)
		{
			// We can be called during close, when closing==true, so we must pass false to ensureOpen:
			EnsureOpen(false);
			if (DoFlush(flushDocStores, flushDeletes) && triggerMerge)
				MaybeMerge();
		}
		

        /// <summary> Tests creating a segment, then check to insure the segment can be seen via
        /// IW.getReader
        /// </summary>
        public virtual void  DoTestIndexWriterReopenSegment(bool optimize)
        {
            Directory   dir1   = new MockRAMDirectory();
            IndexWriter writer = new IndexWriter(dir1, new WhitespaceAnalyzer(), IndexWriter.MaxFieldLength.LIMITED);

            writer.SetInfoStream(infoStream);
            IndexReader r1 = writer.GetReader();

            Assert.AreEqual(0, r1.MaxDoc());
            CreateIndexNoClose(false, "index1", writer);
            writer.Flush(!optimize, true, true);

            IndexReader iwr1 = writer.GetReader();

            Assert.AreEqual(100, iwr1.MaxDoc());

            IndexReader r2 = writer.GetReader();

            Assert.AreEqual(r2.MaxDoc(), 100);
            // add 100 documents
            for (int x = 10000; x < 10000 + 100; x++)
            {
                Document d = CreateDocument(x, "index1", 5);
                writer.AddDocument(d);
            }
            writer.Flush(false, true, true);
            // verify the reader was reopened internally
            IndexReader iwr2 = writer.GetReader();

            Assert.IsTrue(iwr2 != r1);
            Assert.AreEqual(200, iwr2.MaxDoc());
            // should have flushed out a segment
            IndexReader r3 = writer.GetReader();

            Assert.IsTrue(r2 != r3);
            Assert.AreEqual(200, r3.MaxDoc());

            // dec ref the readers rather than close them because
            // closing flushes changes to the writer
            r1.Close();
            iwr1.Close();
            r2.Close();
            r3.Close();
            iwr2.Close();
            writer.Close();

            // test whether the changes made it to the directory
            writer = new IndexWriter(dir1, new WhitespaceAnalyzer(), IndexWriter.MaxFieldLength.LIMITED);
            IndexReader w2r1 = writer.GetReader();

            // insure the deletes were actually flushed to the directory
            Assert.AreEqual(200, w2r1.MaxDoc());
            w2r1.Close();
            writer.Close();

            dir1.Close();
        }