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.db.streaming;
  
  import java.util.Objects;
  
  import com.google.common.base.Preconditions;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.io.sstable.SSTableMultiWriter;
  import org.apache.cassandra.io.sstable.SSTableTxnSingleStreamWriter;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.schema.TableId;
  import org.apache.cassandra.streaming.IncomingStream;
  import org.apache.cassandra.streaming.StreamSession;
  import org.apache.cassandra.streaming.messages.StreamMessageHeader;
  
  /**
   * used to receive the part(or whole) of a SSTable data file.
   *
   * This class deserializes the data stream into partitions and rows, and writes that out as an sstable
   */
  public class CassandraIncomingFile implements IncomingStream
  {
      private final ColumnFamilyStore cfs;
      private final StreamSession session;
      private final StreamMessageHeader header;
  
      private volatile SSTableTxnSingleStreamWriter sstable;
      private volatile long size = -1;
      private volatile int numFiles = 1;
  
      private volatile boolean isEntireSSTable = false;
  
      private static final Logger logger = LoggerFactory.getLogger(CassandraIncomingFile.class);
  
      public CassandraIncomingFile(ColumnFamilyStore cfs, StreamSession session, StreamMessageHeader header)
      {
          this.cfs = cfs;
          this.session = session;
          this.header = header;
      }
  
      @Override
      public StreamSession session()
      {
          return session;
      }
  
      @Override
      public synchronized void read(DataInputPlus in, int version) throws Throwable
      {
          CassandraStreamHeader streamHeader = CassandraStreamHeader.serializer.deserialize(in, version);
          logger.debug("Incoming stream entireSSTable={} components={}", streamHeader.isEntireSSTable, streamHeader.componentManifest);
          session.countStreamedIn(streamHeader.isEntireSSTable);
  
          IStreamReader reader;
          if (streamHeader.isEntireSSTable)
          {
              isEntireSSTable = true;
              reader = new CassandraEntireSSTableStreamReader(header, streamHeader, session);
              numFiles = streamHeader.componentManifest.components().size();
          }
          else if (streamHeader.isCompressed())
              reader = new CassandraCompressedStreamReader(header, streamHeader, session);
          else
              reader = new CassandraStreamReader(header, streamHeader, session);
  
          size = streamHeader.size();
          sstable = (SSTableTxnSingleStreamWriter)reader.read(in);
      }
  
      public synchronized Throwable abort(Throwable t)
      {
          if (sstable != null)
              t = sstable.abort(t);
          return t;
      }
  
      @Override
      public synchronized String getName()
      {
          return sstable == null ? "null" : sstable.getFilename();
      }
  
      @Override
      public synchronized long getSize()
      {
          Preconditions.checkState(size != -1, "Stream hasn't been read yet");
          return size;
      }
  
      @Override
      public int getNumFiles()
      {
          return numFiles;
      }
  
      public boolean isEntireSSTable()
      {
          return isEntireSSTable;
      }
      
      @Override
      public TableId getTableId()
      {
          Preconditions.checkState(sstable != null, "Stream hasn't been read yet");
          return sstable.getTableId();
      }
  
      @Override
      public String toString()
      {
          SSTableMultiWriter sst = sstable;
          return "CassandraIncomingFile{" +
                 "sstable=" + (sst == null ? "null" : sst.getFilename()) +
                 '}';
      }
  
      public SSTableMultiWriter getSSTable()
      {
          Preconditions.checkState(sstable != null, "Stream hasn't been read yet");
          return sstable;
      }
  
      public boolean equals(Object o)
      {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          CassandraIncomingFile that = (CassandraIncomingFile) o;
          return Objects.equals(cfs, that.cfs) &&
                 Objects.equals(session, that.session) &&
                 Objects.equals(header, that.header) &&
                 Objects.equals(sstable, that.sstable);
      }
  
      public int hashCode()
      {
  
          return Objects.hash(cfs, session, header, sstable);
      }
  }
  