content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.cassandra.streaming;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.channels.WritableByteChannel;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  
  import javax.annotation.Nullable;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.Unpooled;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelOutboundHandlerAdapter;
  import io.netty.channel.ChannelPromise;
  import io.netty.channel.embedded.EmbeddedChannel;
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.Util;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  import org.apache.cassandra.db.RowUpdateBuilder;
  import org.apache.cassandra.db.compaction.CompactionManager;
  import org.apache.cassandra.db.streaming.CassandraOutgoingFile;
  import org.apache.cassandra.db.streaming.ComponentManifest;
  import org.apache.cassandra.dht.ByteOrderedPartitioner;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.io.sstable.Descriptor;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.RangesAtEndpoint;
  import org.apache.cassandra.net.AsyncStreamingOutputPlus;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.net.SharedDefaultFileRegion;
  import org.apache.cassandra.schema.CompactionParams;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.streaming.async.NettyStreamingConnectionFactory;
  import org.apache.cassandra.utils.ByteBufferUtil;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static org.apache.cassandra.service.ActiveRepairService.NO_PENDING_REPAIR;
  import static org.apache.cassandra.utils.TimeUUID.Generator.nextTimeUUID;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  public class EntireSSTableStreamingCorrectFilesCountTest
  {
      public static final String KEYSPACE = "EntireSSTableStreamingCorrectFilesCountTest";
      public static final String CF_STANDARD = "Standard1";
  
      private static SSTableReader sstable;
      private static ColumnFamilyStore store;
      private static RangesAtEndpoint rangesAtEndpoint;
  
      @BeforeClass
      public static void defineSchemaAndPrepareSSTable()
      {
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE,
                                      KeyspaceParams.simple(1),
                                      SchemaLoader.standardCFMD(KEYSPACE, CF_STANDARD)
                                                  // LeveledCompactionStrategy is important here,
                                                  // streaming of entire SSTables works currently only with this strategy
                                                  .compaction(CompactionParams.lcs(Collections.emptyMap()))
                                                  .partitioner(ByteOrderedPartitioner.instance));
  
          Keyspace keyspace = Keyspace.open(KEYSPACE);
          store = keyspace.getColumnFamilyStore(CF_STANDARD);
  
          // insert data and compact to a single sstable
          CompactionManager.instance.disableAutoCompaction();
  
          for (int j = 0; j < 10; j++)
          {
              new RowUpdateBuilder(store.metadata(), j, String.valueOf(j))
              .clustering("0")
              .add("val", ByteBufferUtil.EMPTY_BYTE_BUFFER)
              .build()
              .applyUnsafe();
          }
  
          Util.flush(store);
          CompactionManager.instance.performMaximal(store);
  
          sstable = store.getLiveSSTables().iterator().next();
  
          Token start = ByteOrderedPartitioner.instance.getTokenFactory().fromString(Long.toHexString(0));
          Token end = ByteOrderedPartitioner.instance.getTokenFactory().fromString(Long.toHexString(100));
  
          rangesAtEndpoint = RangesAtEndpoint.toDummyList(Collections.singleton(new Range<>(start, end)));
      }
  
      @Test
      public void test() throws Exception
      {
          FileCountingStreamEventHandler streamEventHandler = new FileCountingStreamEventHandler();
          StreamSession session = setupStreamingSessionForTest(streamEventHandler);
          Collection<OutgoingStream> outgoingStreams = store.getStreamManager().createOutgoingStreams(session,
                                                                                                      rangesAtEndpoint,
                                                                                                      NO_PENDING_REPAIR,
                                                                                                      PreviewKind.NONE);
  
          session.addTransferStreams(outgoingStreams);
          AsyncStreamingOutputPlus out = constructDataOutputStream();
  
          for (OutgoingStream outgoingStream : outgoingStreams)
          {
              outgoingStream.write(session, out, MessagingService.VERSION_40);
              // verify hardlinks are removed after streaming
              Descriptor descriptor = ((CassandraOutgoingFile) outgoingStream).getRef().get().descriptor;
              assertTrue(descriptor.getTemporaryFiles().isEmpty());
          }
  
          int totalNumberOfFiles = session.transfers.get(store.metadata.id).getTotalNumberOfFiles();
  
          assertEquals(ComponentManifest.create(sstable).components().size(), totalNumberOfFiles);
          assertEquals(streamEventHandler.fileNames.size(), totalNumberOfFiles);
      }
  
      private AsyncStreamingOutputPlus constructDataOutputStream()
      {
          // This is needed as Netty releases the ByteBuffers as soon as the channel is flushed
          ByteBuf serializedFile = Unpooled.buffer(8192);
          EmbeddedChannel channel = createMockNettyChannel(serializedFile);
          return new AsyncStreamingOutputPlus(channel)
          {
              public void flush() throws IOException
              {
                  // NO-OP
              }
          };
      }
  
      private EmbeddedChannel createMockNettyChannel(ByteBuf serializedFile)
      {
          WritableByteChannel wbc = new WritableByteChannel()
          {
              private boolean isOpen = true;
  
              public int write(ByteBuffer src)
              {
                  int size = src.limit();
                  serializedFile.writeBytes(src);
                  return size;
              }
  
              public boolean isOpen()
              {
                  return isOpen;
              }
  
              public void close()
              {
                  isOpen = false;
              }
          };
  
          return new EmbeddedChannel(new ChannelOutboundHandlerAdapter()
          {
              @Override
              public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception
              {
                  ((SharedDefaultFileRegion) msg).transferTo(wbc, 0);
                  super.write(ctx, msg, promise);
              }
          });
      }
  
  
      private StreamSession setupStreamingSessionForTest(StreamEventHandler streamEventHandler)
      {
          StreamCoordinator streamCoordinator = new StreamCoordinator(StreamOperation.BOOTSTRAP,
                                                                      1,
                                                                      new NettyStreamingConnectionFactory(),
                                                                      false,
                                                                      false,
                                                                      null,
                                                                      PreviewKind.NONE);
  
          StreamResultFuture future = StreamResultFuture.createInitiator(nextTimeUUID(),
                                                                         StreamOperation.BOOTSTRAP,
                                                                         Collections.singleton(streamEventHandler),
                                                                         streamCoordinator);
  
          InetAddressAndPort peer = FBUtilities.getBroadcastAddressAndPort();
          streamCoordinator.addSessionInfo(new SessionInfo(peer,
                                                           0,
                                                           peer,
                                                           Collections.emptyList(),
                                                           Collections.emptyList(),
                                                           StreamSession.State.INITIALIZED,
                                                           null));
  
          StreamSession session = streamCoordinator.getOrCreateOutboundSession(peer);
          session.init(future);
  
          return session;
      }
  
      private static final class FileCountingStreamEventHandler implements StreamEventHandler
      {
          final Collection<String> fileNames = new ArrayList<>();
  
          public void handleStreamEvent(StreamEvent event)
          {
              if (event.eventType == StreamEvent.Type.FILE_PROGRESS && event instanceof StreamEvent.ProgressEvent)
              {
                  StreamEvent.ProgressEvent progressEvent = ((StreamEvent.ProgressEvent) event);
                  fileNames.add(progressEvent.progress.fileName);
              }
          }
  
          public void onSuccess(@Nullable StreamState streamState)
          {
              assert streamState != null;
              assertFalse(streamState.hasFailedSession());
          }
  
          public void onFailure(Throwable throwable)
          {
              fail();
          }
      }
  }
  