org.calrissian.accumulorecipes.lastn.iterator

Class IndexEntryFilteringIterator

java.lang.Object

org.apache.accumulo.core.iterators.WrappingIterator

org.apache.accumulo.core.iterators.Filter

org.calrissian.accumulorecipes.lastn.iterator.IndexEntryFilteringIterator

All Implemented Interfaces:

org.apache.accumulo.core.iterators.OptionDescriber, org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

public class IndexEntryFilteringIterator
extends org.apache.accumulo.core.iterators.Filter

A cleanup filtering iterator to get rid of getTuples that should not exist after the versioning iterator evicts an index. NOTE: This iterator needs to run after the versioning iterator and should run on all scopes (majc,minc,scan).

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.accumulo.core.iterators.OptionDescriber

org.apache.accumulo.core.iterators.OptionDescriber.IteratorOptions

Field Summary

Fields

Modifier and Type	Field and Description
protected String	currentIndex
protected String	previousEvent
protected HashSet<String>	uuidSet

Fields inherited from class org.apache.accumulo.core.iterators.Filter

NEGATE

Constructor Summary

Constructors

Constructor and Description
IndexEntryFilteringIterator()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept(org.apache.accumulo.core.data.Key key, org.apache.accumulo.core.data.Value value) Makes sure only those rows with an index row are kept around.
org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>	deepCopy(org.apache.accumulo.core.iterators.IteratorEnvironment env)
void	init(org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> source, Map<String,String> options, org.apache.accumulo.core.iterators.IteratorEnvironment env)

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

describeOptions, findTop, next, seek, setNegate, validateOptions

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

getSource, getTopKey, getTopValue, hasTop, setSource

Methods inherited from class java.lang.Object

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

Field Detail

uuidSet

protected HashSet<String> uuidSet

currentIndex

protected String currentIndex

previousEvent

protected String previousEvent

Constructor Detail

IndexEntryFilteringIterator

public IndexEntryFilteringIterator()

Method Detail

init

public void init(org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> source,
        Map<String,String> options,
        org.apache.accumulo.core.iterators.IteratorEnvironment env)
          throws IOException

Specified by:

init in interface org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

Overrides:

init in class org.apache.accumulo.core.iterators.Filter

Throws:

IOException

deepCopy

public org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value> deepCopy(org.apache.accumulo.core.iterators.IteratorEnvironment env)

Specified by:

deepCopy in interface org.apache.accumulo.core.iterators.SortedKeyValueIterator<org.apache.accumulo.core.data.Key,org.apache.accumulo.core.data.Value>

Overrides:

deepCopy in class org.apache.accumulo.core.iterators.Filter

accept

public boolean accept(org.apache.accumulo.core.data.Key key,
             org.apache.accumulo.core.data.Value value)

Makes sure only those rows with an index row are kept around. The versioning iterator should have run already and evicted older index rows.

Specified by:

accept in class org.apache.accumulo.core.iterators.Filter

Parameters:

key -

value -

Returns: