org.apache.hadoop.hbase.util

Class MetaUtils

java.lang.Object

org.apache.hadoop.hbase.util.MetaUtils

@InterfaceAudience.Private
public class MetaUtils
extends Object

Contains utility methods for manipulating HBase meta tables. Be sure to call shutdown() when done with this class so it closes resources opened during meta processing (ROOT, META, etc.). Be careful how you use this class. If used during migrations, be careful when using this class to check whether migration is needed.

Constructor Summary

Constructors

Constructor and Description
MetaUtils() Default constructor
MetaUtils(Configuration conf)

Method Summary

Modifier and Type	Method and Description
WAL	getLog(HRegionInfo info)
HRegion	getMetaRegion()
void	shutdown() Closes catalog regions if open.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaUtils

public MetaUtils()
          throws IOException

Default constructor

Throws:

IOException - e

MetaUtils

public MetaUtils(Configuration conf)
          throws IOException

Parameters:

conf - Configuration

Throws:

IOException - e

Method Detail

getLog

public WAL getLog(HRegionInfo info)
           throws IOException

Returns:

the WAL associated with the given region

Throws:

IOException - e

getMetaRegion

public HRegion getMetaRegion()
                      throws IOException

Returns:

HRegion for meta region

Throws:

IOException - e

shutdown

public void shutdown()

Closes catalog regions if open. Also closes and deletes the WAL. You must call this method if you want to persist changes made during a MetaUtils edit session.