/// <exception cref="System.IO.IOException"/>
private void DoTestReceiveAndMirror(PacketReceiver pr, int dataLen, int checksumsLen
)
{
byte[] Data = AppendTestUtil.InitBuffer(dataLen);
byte[] Checksums = AppendTestUtil.InitBuffer(checksumsLen);
byte[] packet = PrepareFakePacket(Data, Checksums);
ByteArrayInputStream @in = new ByteArrayInputStream(packet);
pr.ReceiveNextPacket(@in);
ByteBuffer parsedData = pr.GetDataSlice();
Assert.AssertArrayEquals(Data, RemainingAsArray(parsedData));
ByteBuffer parsedChecksums = pr.GetChecksumSlice();
Assert.AssertArrayEquals(Checksums, RemainingAsArray(parsedChecksums));
PacketHeader header = pr.GetHeader();
NUnit.Framework.Assert.AreEqual(Seqno, header.GetSeqno());
NUnit.Framework.Assert.AreEqual(OffsetInBlock, header.GetOffsetInBlock());
NUnit.Framework.Assert.AreEqual(dataLen + checksumsLen + Ints.Bytes, header.GetPacketLen
());
// Mirror the packet to an output stream and make sure it matches
// the packet we sent.
ByteArrayOutputStream mirrored = new ByteArrayOutputStream();
mirrored = Org.Mockito.Mockito.Spy(mirrored);
pr.MirrorPacketTo(new DataOutputStream(mirrored));
// The write should be done in a single call. Otherwise we may hit
// nasty interactions with nagling (eg HDFS-4049).
Org.Mockito.Mockito.Verify(mirrored, Org.Mockito.Mockito.Times(1)).Write(Org.Mockito.Mockito
.Any <byte[]>(), Org.Mockito.Mockito.AnyInt(), Org.Mockito.Mockito.Eq(packet.Length
));
Org.Mockito.Mockito.VerifyNoMoreInteractions(mirrored);
Assert.AssertArrayEquals(packet, mirrored.ToByteArray());
}
public virtual void TestHSyncBlockBoundary()
{
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).Build();
FileSystem fs = cluster.GetFileSystem();
Path p = new Path("/testHSyncBlockBoundary/foo");
int len = 1 << 16;
byte[] fileContents = AppendTestUtil.InitBuffer(len);
FSDataOutputStream @out = fs.Create(p, FsPermission.GetDefault(), EnumSet.Of(CreateFlag
.Create, CreateFlag.Overwrite, CreateFlag.SyncBlock), 4096, (short)1, len, null);
// fill exactly one block (tests the SYNC_BLOCK case) and flush
@out.Write(fileContents, 0, len);
@out.Hflush();
// the full block should have caused a sync
CheckSyncMetric(cluster, 1);
@out.Hsync();
// first on block again
CheckSyncMetric(cluster, 1);
// write one more byte and sync again
@out.Write(1);
@out.Hsync();
CheckSyncMetric(cluster, 2);
@out.Close();
CheckSyncMetric(cluster, 3);
cluster.Shutdown();
}