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.asterix.replication.sync;
  
  import java.io.IOException;
  import java.io.RandomAccessFile;
  import java.nio.channels.FileChannel;
  
  import org.apache.asterix.common.api.INcApplicationContext;
  import org.apache.asterix.common.exceptions.ReplicationException;
  import org.apache.asterix.replication.api.PartitionReplica;
  import org.apache.asterix.replication.management.NetworkingUtil;
  import org.apache.asterix.replication.messaging.DeleteFileTask;
  import org.apache.asterix.replication.messaging.ReplicateFileTask;
  import org.apache.asterix.replication.messaging.ReplicationProtocol;
  import org.apache.hyracks.api.io.FileReference;
  import org.apache.hyracks.api.io.IIOManager;
  import org.apache.hyracks.api.network.ISocketChannel;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  public class FileSynchronizer {
  
      private static final Logger LOGGER = LogManager.getLogger();
      private final INcApplicationContext appCtx;
      private final PartitionReplica replica;
  
      public FileSynchronizer(INcApplicationContext appCtx, PartitionReplica replica) {
          this.appCtx = appCtx;
          this.replica = replica;
      }
  
      public void replicate(String file) {
          replicate(file, false);
      }
  
      public void replicate(String file, boolean metadata) {
          try {
              final IIOManager ioManager = appCtx.getIoManager();
              final ISocketChannel channel = replica.getChannel();
              final FileReference filePath = ioManager.resolve(file);
              String masterNode = appCtx.getReplicaManager().isPartitionOrigin(replica.getIdentifier().getPartition())
                      ? appCtx.getServiceContext().getNodeId() : null;
              ReplicateFileTask task = new ReplicateFileTask(file, filePath.getFile().length(), metadata, masterNode);
              LOGGER.trace("attempting {} to replica {}", task, replica);
              ReplicationProtocol.sendTo(replica, task);
              // send the file itself
              try (RandomAccessFile fromFile = new RandomAccessFile(filePath.getFile(), "r");
                      FileChannel fileChannel = fromFile.getChannel()) {
                  NetworkingUtil.sendFile(fileChannel, channel);
              }
              ReplicationProtocol.waitForAck(replica);
              LOGGER.debug("completed {} to replica {}", task, replica);
          } catch (IOException e) {
              throw new ReplicationException(e);
          }
      }
  
      public void delete(String file) {
          try {
              final DeleteFileTask task = new DeleteFileTask(file);
              LOGGER.trace("attempting {} from replica {}", task, replica);
              ReplicationProtocol.sendTo(replica, task);
              ReplicationProtocol.waitForAck(replica);
              LOGGER.debug("completed {} from replica {}", task, replica);
          } catch (IOException e) {
              throw new ReplicationException(e);
          }
      }
  }
  