org.apache.hadoop.hbase.client

Class ClientIdGenerator

java.lang.Object

org.apache.hadoop.hbase.client.ClientIdGenerator

@InterfaceAudience.Private
final class ClientIdGenerator
extends Object

The class that is able to determine some unique strings for the client, such as an IP address, PID, and composite deterministic ID.

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ClientIdGenerator()

Method Summary

Modifier and Type	Method and Description
static byte[]	generateClientId()
static byte[]	getIpAddressBytes()
static Long	getPid()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

Constructor Detail

ClientIdGenerator

private ClientIdGenerator()

Method Detail

generateClientId

public static byte[] generateClientId()

Returns:

a unique ID incorporating IP address, PID, TID and timer. Might be an overkill... Note though that new UUID in java by default is just a random number.

getPid

public static Long getPid()

Returns:

PID of the current process, if it can be extracted from JVM name, or null.

getIpAddressBytes

public static byte[] getIpAddressBytes()

Returns:

Some IPv4/IPv6 address available on the current machine that is up, not virtual and not a loopback address. Empty array if none can be found or error occurred.