# NAME

Net::Hadoop::WebHDFS - Client library for Hadoop WebHDFS and HttpFs

# SYNOPSIS

    use Net::Hadoop::WebHDFS;
    my $client = Net::Hadoop::WebHDFS->new( host => 'hostname.local', port => 50070 );

    my $statusArrayRef = $client->list('/');

    my $contentData = $client->read('/data.txt');

    $client->create('/foo/bar/data.bin', $bindata);

# DESCRIPTION

This module supports WebHDFS v1 on Hadoop 1.x (and CDH4.0.0 or later), and HttpFs on Hadoop 2.x (and CDH4 or later).
WebHDFS/HttpFs has two authentication methods: pseudo authentication and Kerberos, but this module supports pseudo authentication only.

# METHODS

Net::Hadoop::WebHDFS class method and instance methods.

## CLASS METHODS

### `Net::Hadoop::WebHDFS->new( %args ) :Net::Hadoop::WebHDFS`

Creates and returns a new client instance with _%args_.
If you are using HttpFs, set _httpfs\_mode =_ 1> and _port =_ 14000>.



_%args_ might be:

- host :Str = "namenode.local"
- port :Int = 50070
- username :Str = "hadoop"
- doas :Str = "hdfs"
- httpfs\_mode :Bool = 0/1

## INSTANCE METHODS

### `$client->create($path, $body, %options) :Bool`

Creates file on HDFS with _$body_ data. If you want to create blank file, pass blank string.

_%options_ might be:

- overwrite :Str = "true" or "false"
- blocksize :Int
- replication :Int
- permission :Str = "0600"
- buffersize :Int

### `$client->append($path, $body, %options) :Bool`

Append _$body_ data to _$path_ file.

_%options_ might be:

- buffersize :Int

### `$client->read($path, %options) :Str`

Open file of _$path_ and returns its content. Alias: __open__.

_%options_ might be:

- offset :Int
- length :Int
- buffersize :Int

### `$client->mkdir($path, [permission => '0644']) :Bool`

Make directory _$path_ on HDFS. Alias: __mkdirs__.

### `$client->rename($path, $dest) :Bool`

Rename file or directory as _$dest_.

### `$client->delete($path, [recursive => 0/1]) :Bool`

Delete file _$path_ from HDFS. With optional _recursive =_ 1>, files and directories are removed recursively (default false).

### `$client->stat($path) :HashRef`

Get and returns file status object for _$path_. Alias: __getfilestatus__.

### `$client->list($path) :ArrayRef`

Get list of files in directory _$path_, and returns these status objects arrayref. Alias: __liststatus__.

### `$client->content_summary($path) :HashRef`

Get 'content summary' object and returns it. Alias: __getcontentsummary__.

### `$client->checksum($path) :HashRef`

Get checksum information object for _$path_. Alias: __getfilechecksum__.

### `$client->homedir() :Str`

Get accessing user's home directory path. Alias: __gethomedirectory__.

### `$client->chmod($path, $mode) :Bool`

Set permission of _$path_ as octal _$mode_. Alias: __setpermission__.

### `$client->chown($path, [owner => 'username', group => 'groupname']) :Bool`

Set owner or group of _$path_. One of owner/group must be specified. Alias: __setowner__.

### `$client->replication($path, $replnum) :Bool`

Set replica number for _$path_. Alias: __setreplication__.

### `$client->touch($path, [modificationtime => $mtime, accesstime => $atime]) :Bool`

Set mtime/atime of _$path_. Alias: __settimes__.

# AUTHOR

TAGOMORI Satoshi <tagomoris {at} gmail.com>

# LICENSE

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
