Package org.apache.hadoop.hdfs.protocol.datatransfer

Enum Class Op

java.lang.Object
java.lang.Enum<Op>
org.apache.hadoop.hdfs.protocol.datatransfer.Op
All Implemented Interfaces:
Serializable, Comparable<Op>, Constable
@Private @Evolving public enum Op extends Enum<Op>
Operation

  • Enum Constant Details

    • WRITE_BLOCK

      public static final Op WRITE_BLOCK

    • READ_BLOCK

      public static final Op READ_BLOCK

    • READ_METADATA

      public static final Op READ_METADATA

    • REPLACE_BLOCK

      public static final Op REPLACE_BLOCK

    • COPY_BLOCK

      public static final Op COPY_BLOCK

    • BLOCK_CHECKSUM

      public static final Op BLOCK_CHECKSUM

    • TRANSFER_BLOCK

      public static final Op TRANSFER_BLOCK

    • REQUEST_SHORT_CIRCUIT_FDS

      public static final Op REQUEST_SHORT_CIRCUIT_FDS

    • RELEASE_SHORT_CIRCUIT_FDS

      public static final Op RELEASE_SHORT_CIRCUIT_FDS

    • REQUEST_SHORT_CIRCUIT_SHM

      public static final Op REQUEST_SHORT_CIRCUIT_SHM

    • BLOCK_GROUP_CHECKSUM

      public static final Op BLOCK_GROUP_CHECKSUM

    • CUSTOM

      public static final Op CUSTOM

  • Field Details

    • code

      public final byte code
      The code for this operation.

  • Method Details

    • values

      public static Op[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static Op valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null

    • read

      public static Op read(DataInput in) throws IOException
      Read from in
      Throws:
      IOException

    • write

      public void write(DataOutput out) throws IOException
      Write to out
      Throws:
      IOException