Package org.apache.hadoop.hbase.replication.regionserver

Enum Class WALEntryStream.HasNext

java.lang.Object
java.lang.Enum<WALEntryStream.HasNext>
org.apache.hadoop.hbase.replication.regionserver.WALEntryStream.HasNext
All Implemented Interfaces:
Serializable, Comparable<WALEntryStream.HasNext>, Constable
Enclosing class:
WALEntryStream
public static enum WALEntryStream.HasNext extends Enum<WALEntryStream.HasNext>

  • Nested Class Summary

    Nested classes/interfaces inherited from class java.lang.Enum

    Enum.EnumDesc<E extends Enum<E>>

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    Description
    NO
    means there is no new entry and stream is end, the upper layer should close this stream and release other resources as well
    RETRY
    means there are something wrong or we have reached EOF of the current file but it is not closed yet and there is no new file in the replication queue yet, you should sleep a while and try to call hasNext again
    RETRY_IMMEDIATELY
    Usually this means we have finished reading a WAL file, and for simplify the implementation of this class, we just let the upper layer issue a new hasNext call again to open the next WAL file.
    YES
    means there is a new entry and you could use peek or next to get current entry

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    HasNext()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static WALEntryStream.HasNext
    valueOf(String name)
    Returns the enum constant of this class with the specified name.
    static WALEntryStream.HasNext[]
    values()
    Returns an array containing the constants of this enum class, in the order they are declared.

    Methods inherited from class java.lang.Enum

    clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • YES

      public static final WALEntryStream.HasNext YES
      means there is a new entry and you could use peek or next to get current entry

    • RETRY

      public static final WALEntryStream.HasNext RETRY
      means there are something wrong or we have reached EOF of the current file but it is not closed yet and there is no new file in the replication queue yet, you should sleep a while and try to call hasNext again

    • RETRY_IMMEDIATELY

      public static final WALEntryStream.HasNext RETRY_IMMEDIATELY
      Usually this means we have finished reading a WAL file, and for simplify the implementation of this class, we just let the upper layer issue a new hasNext call again to open the next WAL file.

    • NO

      public static final WALEntryStream.HasNext NO
      means there is no new entry and stream is end, the upper layer should close this stream and release other resources as well

  • Constructor Details

  • Method Details

    • values

      public static WALEntryStream.HasNext[] 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 WALEntryStream.HasNext 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