Jrb::Hdfs

Jrb::Hdfs is a self-contained native HDFS client which only supports Jruby.

Add this line to your application's Gemfile:

gem 'jrb-hdfs'

And then execute:

$ bundle

Or install it yourself as:

$ gem install jrb-hdfs

require 'jrb/hdfs'

# To create hdfs client, get hadoop config file from your hadoop cluster
client = Jrb::Hdfs::Client.new("hdfs://localhost", "#{ENV['HADOOP_HOME']}/etc/hadoop/")

# list an hdfs entry
client.list('/')

# copy hdfs file to local
client.copy_to_local(src, dst)

# check hdfs file exists
client.exists?(path)

# remove file in hdfs
client.rm(path)

# put file into hdfs
client.put(src, dst)

# mkdir in hdfs
client.mkdir(path) # equals to client.mkdir_p(path)

client = Jrb::Hdfs::Client.new(
  "hdfs://localhost",
  "ENV['HADOOP_HOME']/etc/hadoop/",
  use_kerberos: true,
  kerberos_username: "no-reply@EXAMPLE.COM",
  kerberos_keytab_path: 'your-kerberos-keytab.keytab')

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/myl2821/jrb-hdfs. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.