Module: ZK::Client::Unixisms

Included in:
Base
Defined in:
lib/z_k/client/unixisms.rb

Instance Method Summary collapse

Instance Method Details

#find(*paths, &block) ⇒ Object

see ZK::Find for explanation



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# File 'lib/z_k/client/unixisms.rb', line 51

def find(*paths, &block)
  ZK::Find.find(self, *paths, &block)
end

#mkdir_p(path) ⇒ Object

Creates all parent paths and ‘path’ in zookeeper as persistent nodes with zero data.

Arguments

  • path: An absolute znode path to create

Examples

zk.exists?('/path')
# => false

zk.mkdir_p('/path/to/blah')
# => "/path/to/blah"

– TODO: write a non-recursive version of this. ruby doesn’t have TCO, so this could get expensive w/ psychotically long paths



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# File 'lib/z_k/client/unixisms.rb', line 21

def mkdir_p(path)
  create(path, '', :mode => :persistent)
rescue Exceptions::NodeExists
  return
rescue Exceptions::NoNode
  if File.dirname(path) == '/'
    # ok, we're screwed, blow up
    raise KeeperException, "could not create '/', something is wrong", caller
  end

  mkdir_p(File.dirname(path))
  retry
end

#rm_rf(paths) ⇒ Object

recursively remove all children of path then remove path itself



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# File 'lib/z_k/client/unixisms.rb', line 36

def rm_rf(paths)
  Array(paths).flatten.each do |path|
    begin
      children(path).each do |child|
        rm_rf(File.join(path, child))
      end

      delete(path)
      nil
    rescue Exceptions::NoNode
    end
  end
end