Package org.apache.hadoop.hbase.replication

Class SystemTableWALEntryFilter

java.lang.Object

org.apache.hadoop.hbase.replication.SystemTableWALEntryFilter

All Implemented Interfaces:

WALEntryFilter

@Private
public class SystemTableWALEntryFilter
extends Object
implements WALEntryFilter

Skips WAL edits for all System tables including hbase:meta except hbase:acl. As of now, only 2 tables can be allowed for replication - hbase:acl and hbase:labels. Other tables which not be replicated are 1. hbase:meta - not to be replicated 2. hbase:canary - for current cluster 3. hbase:namespace - Deprecated and moved to meta 4. hbase:quota - related to namespace, quota for the current cluster usage 5. hbase:rsgroup - contains hostnames

Constructor Summary

Constructors

Constructor	Description
SystemTableWALEntryFilter()

Method Summary

Modifier and Type	Method	Description
WAL.Entry	filter(WAL.Entry entry)	Applies the filter, possibly returning a different Entry instance.

Methods inherited from class java.lang.Object

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

Constructor Details

SystemTableWALEntryFilter

public SystemTableWALEntryFilter()

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

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.