Package org.apache.accumulo.test.functional

Class YieldingIterator

java.lang.Object

org.apache.accumulo.core.iterators.WrappingIterator

org.apache.accumulo.test.functional.YieldingIterator

All Implemented Interfaces:

SortedKeyValueIterator<Key,Value>, YieldingKeyValueIterator<Key,Value>

public class YieldingIterator
extends WrappingIterator

This iterator which implements yielding will yield after every other next and every other seek call.

Constructor Summary

Constructors

Constructor	Description
YieldingIterator()

Method Summary

Modifier and Type	Method	Description
SortedKeyValueIterator<Key,Value>	deepCopy(IteratorEnvironment env)
void	enableYielding(YieldCallback<Key> yield)
Value	getTopValue()	The top value will encode the current state of the yields, seeks, and rebuilds for use by the YieldScannersIT tests.
boolean	hasTop()
void	next()
protected void	resetCounters()
void	seek(Range range, Collection<ByteSequence> columnFamilies, boolean inclusive)

Methods inherited from class org.apache.accumulo.core.iterators.WrappingIterator

getSource, getTopKey, init, setSource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

YieldingIterator

public YieldingIterator()

Method Detail

deepCopy

public SortedKeyValueIterator<Key,Value> deepCopy(IteratorEnvironment env)

Specified by:

deepCopy in interface SortedKeyValueIterator<Key,Value>

Overrides:

deepCopy in class WrappingIterator

hasTop

public boolean hasTop()

Specified by:

hasTop in interface SortedKeyValueIterator<Key,Value>

Overrides:

hasTop in class WrappingIterator

next

public void next()
          throws IOException

Specified by:

next in interface SortedKeyValueIterator<Key,Value>

Overrides:

next in class WrappingIterator

Throws:

IOException

getTopValue

public Value getTopValue()

The top value will encode the current state of the yields, seeks, and rebuilds for use by the YieldScannersIT tests.

Specified by:

getTopValue in interface SortedKeyValueIterator<Key,Value>

Overrides:

getTopValue in class WrappingIterator

Returns:

a top value of the form {yieldNexts},{yieldSeeks},{rebuilds}

seek

public void seek(Range range,
                 Collection<ByteSequence> columnFamilies,
                 boolean inclusive)
          throws IOException

Specified by:

seek in interface SortedKeyValueIterator<Key,Value>

Overrides:

seek in class WrappingIterator

Throws:

IOException

enableYielding

public void enableYielding(YieldCallback<Key> yield)

resetCounters

protected void resetCounters()