Package org.apache.hadoop.hbase.replication

Class ChainWALEmptyEntryFilter

java.lang.Object

org.apache.hadoop.hbase.replication.ChainWALEntryFilter

org.apache.hadoop.hbase.replication.ChainWALEmptyEntryFilter

All Implemented Interfaces:

WALEntryFilter

@LimitedPrivate("Replication")
public class ChainWALEmptyEntryFilter
extends ChainWALEntryFilter

A ChainWALEntryFilter for providing more flexible options

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	filterEmptyEntry

Constructor Summary

Constructors

Constructor	Description
ChainWALEmptyEntryFilter(List<WALEntryFilter> filters)
ChainWALEmptyEntryFilter(WALEntryFilter... filters)

Method Summary

Modifier and Type	Method	Description
WAL.Entry	filter(WAL.Entry entry)	Applies the filter, possibly returning a different Entry instance.
void	setFilterEmptyEntry(boolean filterEmptyEntry)	To allow the empty entries to get filtered, we want to set this optional flag to decide if we want to filter the entries which have no cells or all cells got filtered though WALCellFilter.

Methods inherited from class org.apache.hadoop.hbase.replication.ChainWALEntryFilter

filterCells, filterEntry, initCellFilters

Methods inherited from class java.lang.Object

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

Field Details

filterEmptyEntry

private boolean filterEmptyEntry

Constructor Details

ChainWALEmptyEntryFilter

public ChainWALEmptyEntryFilter(WALEntryFilter... filters)

ChainWALEmptyEntryFilter

public ChainWALEmptyEntryFilter(List<WALEntryFilter> filters)

Method Details

filter

public WAL.Entry filter(WAL.Entry entry)

Description copied from interface: WALEntryFilter

Applies the filter, possibly returning a different Entry instance. If null is returned, the entry will be skipped.

Notice that you are free to modify the cell list of the give entry, but do not change the content of the cell, it may be used by others at the same time(and usually you can not modify a cell unless you cast it to the implementation class, which is not a good idea).

Specified by:

filter in interface WALEntryFilter

Overrides:

filter in class ChainWALEntryFilter

Parameters:

entry - Entry to filter

Returns:

a (possibly modified) Entry to use. Returning null or an entry with no cells will cause the entry to be skipped for replication.

setFilterEmptyEntry

@Private
public void setFilterEmptyEntry(boolean filterEmptyEntry)

To allow the empty entries to get filtered, we want to set this optional flag to decide if we want to filter the entries which have no cells or all cells got filtered though WALCellFilter.

Parameters:

filterEmptyEntry - flag