org.apache.hadoop.hbase.procedure2.store

Interface ProcedureStore.ProcedureIterator

All Known Implementing Classes:

WALProcedureTree.Iter

Enclosing interface:

ProcedureStore

public static interface ProcedureStore.ProcedureIterator

An Iterator over a collection of Procedure

Method Summary

Modifier and Type	Method and 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 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.

Method Detail

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