org.apache.hadoop.hbase.client

Class ConnectionUtils

java.lang.Object

org.apache.hadoop.hbase.client.ConnectionUtils

@InterfaceAudience.Private
public final class ConnectionUtils
extends Object

Utility used by client connections.

Field Summary

Fields

Modifier and Type	Field and Description
static String	HBASE_CLIENT_CONNECTION_IMPL Key for configuration in Configuration whose value is the class we implement making a new Connection instance.
static long	SLEEP_DELTA_NS

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.hbase.client.ScanResultCache	createScanResultCache(Scan scan)
static long	getPauseTime(long pause, int tries) Calculate pause time.
static void	setServerSideHConnectionRetriesConfig(org.apache.hadoop.conf.Configuration c, String sn, org.slf4j.Logger log) Changes the configuration to set the number of retries needed when using Connection internally, e.g.

Methods inherited from class java.lang.Object

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

Field Detail

HBASE_CLIENT_CONNECTION_IMPL

public static final String HBASE_CLIENT_CONNECTION_IMPL

Key for configuration in Configuration whose value is the class we implement making a new Connection instance.

See Also:

Constant Field Values

SLEEP_DELTA_NS

public static final long SLEEP_DELTA_NS

Method Detail

getPauseTime

public static long getPauseTime(long pause,
                                int tries)

Calculate pause time. Built on HConstants.RETRY_BACKOFF.

Parameters:

pause - time to pause

tries - amount of tries

Returns:

How long to wait after tries retries

setServerSideHConnectionRetriesConfig

public static void setServerSideHConnectionRetriesConfig(org.apache.hadoop.conf.Configuration c,
                                                         String sn,
                                                         org.slf4j.Logger log)

Changes the configuration to set the number of retries needed when using Connection internally, e.g. for updating catalog tables, etc. Call this method before we create any Connections.

Parameters:

c - The Configuration instance to set the retries into.

log - Used to log what we set in here.

createScanResultCache

public static org.apache.hadoop.hbase.client.ScanResultCache createScanResultCache(Scan scan)