org.apache.hadoop.hbase.backup.example

Class HFileArchiveManager

java.lang.Object

org.apache.hadoop.hbase.backup.example.HFileArchiveManager

@InterfaceAudience.Private
class HFileArchiveManager
extends Object

Client-side manager for which table's hfiles should be preserved for long-term archive.

See Also:

ZKTableArchiveClient, HFileArchiveTableMonitor, LongTermArchivingHFileCleaner

Field Summary

Fields

Modifier and Type	Field and Description
private String	archiveZnode
private static org.slf4j.Logger	LOG
private boolean	stopped
private ZKWatcher	zooKeeper

Constructor Summary

Constructors

Constructor and Description
HFileArchiveManager(Connection connection, org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method and Description
private void	disable(ZKWatcher zooKeeper, byte[] table) Disable all archiving of files for a given table
HFileArchiveManager	disableHFileBackup() Disable long-term archival of all hfiles for all tables in the cluster.
HFileArchiveManager	disableHFileBackup(byte[] table) Stop retaining HFiles for the given table in the archive.
private void	enable(ZKWatcher zooKeeper, byte[] table) Perform a best effort enable of hfile retention, which relies on zookeeper communicating the // * change back to the hfile cleaner.
HFileArchiveManager	enableHFileBackup(byte[] table) Turn on auto-backups of HFiles on the specified table.
private String	getTableNode(byte[] table) Get the zookeeper node associated with archiving the given table
boolean	isArchivingEnabled(byte[] table) Check to see if the table is currently marked for archiving
void	stop()

Methods inherited from class java.lang.Object

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

Field Detail

archiveZnode

private final String archiveZnode

LOG

private static final org.slf4j.Logger LOG

zooKeeper

private final ZKWatcher zooKeeper

stopped

private volatile boolean stopped

Constructor Detail

HFileArchiveManager

public HFileArchiveManager(Connection connection,
                           org.apache.hadoop.conf.Configuration conf)
                    throws ZooKeeperConnectionException,
                           IOException

Throws:

ZooKeeperConnectionException

IOException

Method Detail

enableHFileBackup

public HFileArchiveManager enableHFileBackup(byte[] table)
                                      throws org.apache.zookeeper.KeeperException

Turn on auto-backups of HFiles on the specified table.

When HFiles would be deleted from the hfile archive, they are instead preserved.

Parameters:

table - name of the table for which to preserve hfiles.

Returns:

this for chaining.

Throws:

org.apache.zookeeper.KeeperException - if we can't reach zookeeper to update the hfile cleaner.

disableHFileBackup

public HFileArchiveManager disableHFileBackup(byte[] table)
                                       throws org.apache.zookeeper.KeeperException

Stop retaining HFiles for the given table in the archive. HFiles will be cleaned up on the next pass of the HFileCleaner, if the HFiles are retained by another cleaner.

Parameters:

table - name of the table for which to disable hfile retention.

Returns:

this for chaining.

Throws:

org.apache.zookeeper.KeeperException - if if we can't reach zookeeper to update the hfile cleaner.

disableHFileBackup

public HFileArchiveManager disableHFileBackup()
                                       throws IOException

Disable long-term archival of all hfiles for all tables in the cluster.

Returns:

this for chaining.

Throws:

IOException - if the number of attempts is exceeded

enable

private void enable(ZKWatcher zooKeeper,
                    byte[] table)
             throws org.apache.zookeeper.KeeperException

Perform a best effort enable of hfile retention, which relies on zookeeper communicating the // * change back to the hfile cleaner.

No attempt is made to make sure that backups are successfully created - it is inherently an asynchronous operation.

Parameters:

zooKeeper - watcher connection to zk cluster

table - table name on which to enable archiving

Throws:

org.apache.zookeeper.KeeperException

disable

private void disable(ZKWatcher zooKeeper,
                     byte[] table)
              throws org.apache.zookeeper.KeeperException

Disable all archiving of files for a given table

Inherently an asynchronous operation.

Parameters:

zooKeeper - watcher for the ZK cluster

table - name of the table to disable

Throws:

org.apache.zookeeper.KeeperException - if an unexpected ZK connection issues occurs

stop

public void stop()

isArchivingEnabled

public boolean isArchivingEnabled(byte[] table)
                           throws org.apache.zookeeper.KeeperException

Check to see if the table is currently marked for archiving

Parameters:

table - name of the table to check

Returns:

true if the archive znode for that table exists, false if not

Throws:

org.apache.zookeeper.KeeperException - if an unexpected zookeeper error occurs

getTableNode

private String getTableNode(byte[] table)

Get the zookeeper node associated with archiving the given table

Parameters:

table - name of the table to check

Returns:

znode for the table's archive status