Package org.apache.hadoop.fs.viewfs

Class HCFSMountTableConfigLoader

java.lang.Object

org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader

All Implemented Interfaces:

MountTableConfigLoader

public class HCFSMountTableConfigLoader
extends java.lang.Object
implements MountTableConfigLoader

An implementation for Apache Hadoop compatible file system based mount-table file loading.

Constructor Summary

Constructors

Constructor	Description
HCFSMountTableConfigLoader()

Method Summary

Modifier and Type	Method	Description
void	load(java.lang.String mountTableConfigPath, Configuration conf)	Loads the mount-table configuration from hadoop compatible file system and add the configuration items to given configuration.

Methods inherited from class java.lang.Object

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

Constructor Detail

HCFSMountTableConfigLoader

public HCFSMountTableConfigLoader()

Method Detail

load

public void load(java.lang.String mountTableConfigPath,
                 Configuration conf)
          throws java.io.IOException

Loads the mount-table configuration from hadoop compatible file system and add the configuration items to given configuration. Mount-table configuration format should be suffixed with version number. Format: mount-table.<versionNumber>.xml Example: mount-table.1.xml When user wants to update mount-table, the expectation is to upload new mount-table configuration file with monotonically increasing integer as version number. This API loads the highest version number file. We can also configure single file path directly.

Specified by:

load in interface MountTableConfigLoader

Parameters:

mountTableConfigPath - : A directory path where mount-table files stored or a mount-table file path. We recommend to configure directory with the mount-table version files.

conf - : to add the mount table as resource.

Throws:

java.io.IOException - raised on errors performing I/O.