org.apache.hadoop.hbase.io

Class HLogLink

java.lang.Object

org.apache.hadoop.hbase.io.FileLink

org.apache.hadoop.hbase.io.HLogLink

@InterfaceAudience.Private
public class HLogLink
extends FileLink

HLogLink describes a link to a WAL. An hlog can be in /hbase/.logs// or it can be in /hbase/.oldlogs/ The link checks first in the original path, if it is not present it fallbacks to the archived path.

Field Summary

Fields inherited from class org.apache.hadoop.hbase.io.FileLink

BACK_REFERENCES_DIRECTORY_PREFIX

Constructor Summary

Constructors

Constructor and Description
HLogLink(org.apache.hadoop.conf.Configuration conf, String serverName, String logName)
HLogLink(org.apache.hadoop.fs.Path originPath, org.apache.hadoop.fs.Path archivePath)
HLogLink(org.apache.hadoop.fs.Path rootDir, String serverName, String logName)

Method Summary

Methods inherited from class org.apache.hadoop.hbase.io.FileLink

getAvailablePath, getBackReferenceFileName, getBackReferencesDir, getFileStatus, getLocations, isBackReferencesDir, open, open, setLocations, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

HLogLink

public HLogLink(org.apache.hadoop.conf.Configuration conf,
        String serverName,
        String logName)
         throws IOException

Parameters:

conf - Configuration from which to extract specific archive locations

serverName - Region Server owner of the log

logName - WAL file name

Throws:

IOException - on unexpected error.

HLogLink

public HLogLink(org.apache.hadoop.fs.Path rootDir,
        String serverName,
        String logName)

Parameters:

rootDir - Path to the root directory where hbase files are stored

serverName - Region Server owner of the log

logName - WAL file name

HLogLink

public HLogLink(org.apache.hadoop.fs.Path originPath,
        org.apache.hadoop.fs.Path archivePath)

Parameters:

originPath - Path to the wal in the log directory

archivePath - Path to the wal in the archived log directory