org.apache.hadoop.hbase.backup.example

Class TableHFileArchiveTracker

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKListener

org.apache.hadoop.hbase.backup.example.TableHFileArchiveTracker

@InterfaceAudience.Private
public class TableHFileArchiveTracker
extends ZKListener

Track HFile archiving state changes in ZooKeeper. Keeps track of the tables whose HFiles should be kept in the archive.

start() needs to be called to start monitoring for tables to archive.

Field Summary

Fields

Modifier and Type	Field and Description
static String	HFILE_ARCHIVE_ZNODE_PARENT

Fields inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

watcher

Method Summary

Modifier and Type	Method and Description
static TableHFileArchiveTracker	create(org.apache.hadoop.conf.Configuration conf) Create an archive tracker for the passed in server
HFileArchiveTableMonitor	getMonitor()
ZKWatcher	getZooKeeperWatcher()
boolean	keepHFiles(String tableName) Determine if the given table should or should not allow its hfiles to be deleted
void	nodeChildrenChanged(String path) Called when an existing node has a child node added or removed.
void	nodeCreated(String path) Called when a new node has been created.
void	nodeDeleted(String path) Called when a node has been deleted
void	start() Start monitoring for archive updates
void	stop() Stop this tracker and the passed zookeeper

Methods inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

getWatcher, nodeDataChanged

Methods inherited from class java.lang.Object

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

Field Detail

HFILE_ARCHIVE_ZNODE_PARENT

public static final String HFILE_ARCHIVE_ZNODE_PARENT

See Also:

Constant Field Values

Method Detail

start

public void start()
           throws org.apache.zookeeper.KeeperException

Start monitoring for archive updates

Throws:

org.apache.zookeeper.KeeperException - on failure to find/create nodes

nodeCreated

public void nodeCreated(String path)

Description copied from class: ZKListener

Called when a new node has been created.

Overrides:

nodeCreated in class ZKListener

Parameters:

path - full path of the new node

nodeChildrenChanged

public void nodeChildrenChanged(String path)

Description copied from class: ZKListener

Called when an existing node has a child node added or removed.

Overrides:

nodeChildrenChanged in class ZKListener

Parameters:

path - full path of the node whose children have changed

nodeDeleted

public void nodeDeleted(String path)

Description copied from class: ZKListener

Called when a node has been deleted

Overrides:

nodeDeleted in class ZKListener

Parameters:

path - full path of the deleted node

keepHFiles

public boolean keepHFiles(String tableName)

Determine if the given table should or should not allow its hfiles to be deleted

Parameters:

tableName - name of the table to check

Returns:

true if its store files should be retained, false otherwise

getMonitor

public final HFileArchiveTableMonitor getMonitor()

Returns:

the tracker for which tables should be archived.

create

public static TableHFileArchiveTracker create(org.apache.hadoop.conf.Configuration conf)
                                       throws ZooKeeperConnectionException,
                                              IOException

Create an archive tracker for the passed in server

Parameters:

conf - to read for zookeeper connection information

Returns:

ZooKeeper tracker to monitor for this server if this server should archive hfiles for a given table

Throws:

IOException - If a unexpected exception occurs

ZooKeeperConnectionException - if we can't reach zookeeper

getZooKeeperWatcher

public ZKWatcher getZooKeeperWatcher()

stop

public void stop()

Stop this tracker and the passed zookeeper