Examples of org.apache.hadoop.fs.FsServerDefaults

org.apache.hadoop.fs.FsServerDefaults
Provides server default configuration values to clients.

                     .numDataNodes(DFSConfigKeys.DFS_REPLICATION_DEFAULT + 1)
                     .build();
    cluster.waitActive();
    FileSystem fs = cluster.getFileSystem();
    try {
      FsServerDefaults serverDefaults = fs.getServerDefaults();
      assertEquals(DFS_BLOCK_SIZE_DEFAULT, serverDefaults.getBlockSize());
      assertEquals(DFS_BYTES_PER_CHECKSUM_DEFAULT, serverDefaults.getBytesPerChecksum());
      assertEquals(DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT, serverDefaults.getWritePacketSize());
      assertEquals(DFS_REPLICATION_DEFAULT + 1, serverDefaults.getReplication());
      assertEquals(IO_FILE_BUFFER_SIZE_DEFAULT, serverDefaults.getFileBufferSize());
    } finally {
      fs.close();
      cluster.shutdown();
    }
  }

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      } catch (IllegalArgumentException iae) {
         throw new IOException("Invalid checksum type in "
            + DFS_CHECKSUM_TYPE_KEY + ": " + checksumTypeStr);
      }


      this.serverDefaults = new FsServerDefaults(
          conf.getLongBytes(DFS_BLOCK_SIZE_KEY, DFS_BLOCK_SIZE_DEFAULT),
          conf.getInt(DFS_BYTES_PER_CHECKSUM_KEY, DFS_BYTES_PER_CHECKSUM_DEFAULT),
          conf.getInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY, DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT),
          (short) conf.getInt(DFS_REPLICATION_KEY, DFS_REPLICATION_DEFAULT),
          conf.getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT),

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      } catch (IllegalArgumentException iae) {
         throw new IOException("Invalid checksum type in "
            + DFS_CHECKSUM_TYPE_KEY + ": " + checksumTypeStr);
      }


      this.serverDefaults = new FsServerDefaults(
          conf.getLongBytes(DFS_BLOCK_SIZE_KEY, DFS_BLOCK_SIZE_DEFAULT),
          conf.getInt(DFS_BYTES_PER_CHECKSUM_KEY, DFS_BYTES_PER_CHECKSUM_DEFAULT),
          conf.getInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY, DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT),
          (short) conf.getInt(DFS_REPLICATION_KEY, DFS_REPLICATION_DEFAULT),
          conf.getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT),

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   * @return true if data sent between this client and DNs should be encrypted,
   *         false otherwise.
   * @throws IOException in the event of error communicating with the NN
   */
  boolean shouldEncryptData() throws IOException {
    FsServerDefaults d = getServerDefaults();
    return d == null ? false : d.getEncryptDataTransfer();
  }

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    return b.build();
  }
  
  public static FsServerDefaults convert(FsServerDefaultsProto fs) {
    if (fs == null) return null;
    return new FsServerDefaults(
        fs.getBlockSize(), fs.getBytesPerChecksum(), 
        fs.getWritePacketSize(), (short) fs.getReplication(),
        fs.getFileBufferSize(),
        fs.getEncryptDataTransfer(),
        fs.getTrashInterval(),

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      } catch (IllegalArgumentException iae) {
         throw new IOException("Invalid checksum type in "
            + DFS_CHECKSUM_TYPE_KEY + ": " + checksumTypeStr);
      }


      this.serverDefaults = new FsServerDefaults(
          conf.getLongBytes(DFS_BLOCK_SIZE_KEY, DFS_BLOCK_SIZE_DEFAULT),
          conf.getInt(DFS_BYTES_PER_CHECKSUM_KEY, DFS_BYTES_PER_CHECKSUM_DEFAULT),
          conf.getInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY, DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT),
          (short) conf.getInt(DFS_REPLICATION_KEY, DFS_REPLICATION_DEFAULT),
          conf.getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT),

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    return b.build();
  }
  
  public static FsServerDefaults convert(FsServerDefaultsProto fs) {
    if (fs == null) return null;
    return new FsServerDefaults(
        fs.getBlockSize(), fs.getBytesPerChecksum(), 
        fs.getWritePacketSize(), (short) fs.getReplication(),
        fs.getFileBufferSize(),
        fs.getEncryptDataTransfer(),
        fs.getTrashInterval(),

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  @Override
  public GetServerDefaultsResponseProto getServerDefaults(
      RpcController controller, GetServerDefaultsRequestProto req)
      throws ServiceException {
    try {
      FsServerDefaults result = server.getServerDefaults();
      return GetServerDefaultsResponseProto.newBuilder()
          .setServerDefaults(PBHelper.convert(result))
          .build();
    } catch (IOException e) {
      throw new ServiceException(e);

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   * @return true if data sent between this client and DNs should be encrypted,
   *         false otherwise.
   * @throws IOException in the event of error communicating with the NN
   */
  boolean shouldEncryptData() throws IOException {
    FsServerDefaults d = getServerDefaults();
    return d == null ? false : d.getEncryptDataTransfer();
  }

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  @Override
  public GetServerDefaultsResponseProto getServerDefaults(
      RpcController controller, GetServerDefaultsRequestProto req)
      throws ServiceException {
    try {
      FsServerDefaults result = server.getServerDefaults();
      return GetServerDefaultsResponseProto.newBuilder()
          .setServerDefaults(PBHelper.convert(result))
          .build();
    } catch (IOException e) {
      throw new ServiceException(e);

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