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.io.IOException;
  import java.nio.channels.FileChannel;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.io.sstable.Component;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.streaming.ProgressInfo;
  import org.apache.cassandra.streaming.StreamManager;
  import org.apache.cassandra.streaming.StreamSession;
  import org.apache.cassandra.streaming.StreamingDataOutputPlus;
  
  import static org.apache.cassandra.streaming.StreamManager.StreamRateLimiter;
  import static org.apache.cassandra.utils.FBUtilities.prettyPrintMemory;
  
  /**
   * CassandraEntireSSTableStreamWriter streams the entire SSTable to given channel.
   */
  public class CassandraEntireSSTableStreamWriter
  {
      private static final Logger logger = LoggerFactory.getLogger(CassandraEntireSSTableStreamWriter.class);
  
      private final SSTableReader sstable;
      private final ComponentContext context;
      private final ComponentManifest manifest;
      private final StreamSession session;
      private final StreamRateLimiter limiter;
  
      public CassandraEntireSSTableStreamWriter(SSTableReader sstable, StreamSession session, ComponentContext context)
      {
          this.session = session;
          this.sstable = sstable;
          this.context = context;
          this.manifest = context.manifest();
          this.limiter = StreamManager.getEntireSSTableRateLimiter(session.peer);
      }
  
      /**
       * Stream the entire file to given channel.
       * <p>
       * TODO: this currently requires a companion thread, but could be performed entirely asynchronously
       * @param out where this writes data to
       * @throws IOException on any I/O error
       */
      public void write(StreamingDataOutputPlus out) throws IOException
      {
          long totalSize = manifest.totalSize();
          logger.debug("[Stream #{}] Start streaming sstable {} to {}, repairedAt = {}, totalSize = {}",
                       session.planId(),
                       sstable.getFilename(),
                       session.peer,
                       sstable.getSSTableMetadata().repairedAt,
                       prettyPrintMemory(totalSize));
  
          long progress = 0L;
  
          for (Component component : manifest.components())
          {
              // Total Length to transmit for this file
              long length = manifest.sizeOf(component);
  
              // tracks write progress
              logger.debug("[Stream #{}] Streaming {}.{} gen {} component {} size {}", session.planId(),
                           sstable.getKeyspaceName(),
                           sstable.getColumnFamilyName(),
                           sstable.descriptor.id,
                           component,
                           prettyPrintMemory(length));
  
              FileChannel channel = context.channel(sstable.descriptor, component, length);
              long bytesWritten = out.writeFileToChannel(channel, limiter);
              progress += bytesWritten;
  
              session.progress(sstable.descriptor.fileFor(component).toString(), ProgressInfo.Direction.OUT, bytesWritten, bytesWritten, length);
  
              logger.debug("[Stream #{}] Finished streaming {}.{} gen {} component {} to {}, xfered = {}, length = {}, totalSize = {}",
                           session.planId(),
                           sstable.getKeyspaceName(),
                           sstable.getColumnFamilyName(),
                           sstable.descriptor.id,
                           component,
                           session.peer,
                           prettyPrintMemory(bytesWritten),
                           prettyPrintMemory(length),
                           prettyPrintMemory(totalSize));
          }
  
          out.flush();
  
          logger.debug("[Stream #{}] Finished streaming sstable {} to {}, xfered = {}, totalSize = {}",
                       session.planId(),
                       sstable.getFilename(),
                       session.peer,
                       prettyPrintMemory(progress),
                       prettyPrintMemory(totalSize));
  
      }
  }
  