Package org.apache.hadoop.hbase.procedure2.store

Interface ProcedureStore.ProcedureIterator

All Known Implementing Classes:
InMemoryProcedureIterator
Enclosing interface:
ProcedureStore
public static interface ProcedureStore.ProcedureIterator
An Iterator over a collection of Procedure

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    hasNext()
    Returns true if the iterator has more elements.
    boolean
    isNextFinished()
    Calling this method does not need to convert the protobuf message to the Procedure class, so if it returns true we can call skipNext() to skip the procedure without deserializing.
    Procedure
    next()
    Returns the next procedure in the iteration.
    void
    reset()
    Reset the Iterator by seeking to the beginning of the list.
    void
    skipNext()
    Skip the next procedure

  • Method Details

    • reset

      void reset()
      Reset the Iterator by seeking to the beginning of the list.

    • hasNext

      boolean hasNext()
      Returns true if the iterator has more elements. (In other words, returns true if next() would return a Procedure rather than throwing an exception.)
      Returns:
      true if the iterator has more procedures

    • isNextFinished

      boolean isNextFinished()
      Calling this method does not need to convert the protobuf message to the Procedure class, so if it returns true we can call skipNext() to skip the procedure without deserializing. This could increase the performance.
      Returns:
      true if the iterator next element is a completed procedure.

    • skipNext

      void skipNext()
      Skip the next procedure

      This method is used to skip the deserializing of the procedure to increase performance, as when calling next we need to convert the protobuf message to the Procedure class.

    • next

      Procedure next() throws IOException
      Returns the next procedure in the iteration.
      Returns:
      the next procedure in the iteration.
      Throws:
      IOException - if there was an error fetching/deserializing the procedure