Class: ODisk::Planner

Inherits:
Opee::Collector
  • Object
show all
Defined in:
lib/odisk/planner.rb

Overview

The Planner collects input in the form of Digests from a Digester and a Fetcher and then determines what actions are necessary to synchronize a directory. The Planner then asks Copiers and Crypters to perform the synchronization operations.

Defined Under Namespace

Classes: Step

Class Method Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (Planner) initialize(options = {})

Returns a new instance of Planner



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# File 'lib/odisk/planner.rb', line 11

def initialize(options={})
  super(options)
end

Class Method Details

+ (Object) sync_steps(pd, ld, rd, master = nil)

master can be Step::LOCAL or Step::REMOTE and forces direction



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# File 'lib/odisk/planner.rb', line 25

def self.sync_steps(pd, ld, rd, master=nil)
  steps = {}
  lh = {}
  rh = {}
  ph = {}
  ld.entries.each { |e| lh[e.name] = e }
  rd.entries.each { |e| rh[e.name] = e }
  pd.entries.each { |e| ph[e.name] = e } unless pd.nil?
  keys = lh.keys | rh.keys
  keys.each do |name|
    le = lh[name]
    re = rh[name]
    if re.nil?
      if Step::REMOTE == master
        steps[name] = Step.new(name, Step::LOCAL, Step::REMOVE)
      elsif le.is_a?(::ODisk::File)
        steps[name] = Step.new(name, Step::LOCAL, Step::COPY)
      elsif le.is_a?(::ODisk::Dir)
        steps[name] = Step.new(name, Step::LOCAL, Step::DIGEST)
      end
    elsif le.nil?
      if Step::LOCAL == master
        steps[name] = Step.new(name, Step::REMOTE, Step::REMOVE)
      elsif re.is_a?(::ODisk::File)
        steps[name] = Step.new(name, Step::REMOTE, Step::COPY)
      elsif re.is_a?(::ODisk::Dir)
        steps[name] = Step.new(name, Step::REMOTE, Step::DIGEST)
      end
    elsif le != re # both exist but are different
      if le.class != re.class
        ::Opee::Env.error("Conflict syncing #{ld.top_path}/#{name}. Local and remote types do not match.")
        steps[name] = Step.new(name, Step::LOCAL, Step::ERROR)
      elsif le.removed
        ::Opee::Env.error("Unexpected digest entry for #{ld.top_path}/#{name}. The removed flag is sent in the local digest.")
      elsif re.removed
        steps[name] = Step.new(name, Step::LOCAL, Step::REMOVE)
      elsif le.is_a?(::ODisk::File) || le.is_a?(::ODisk::Link)
        op = le.is_a?(::ODisk::File) ? Step::COPY : Step::LINK
        if Step::LOCAL == master
          steps[name] = Step.new(name, Step::LOCAL, op) if le.is_a?(::ODisk::File)
        elsif Step::REMOTE == master
          steps[name] = Step.new(name, Step::REMOTE, op) if re.is_a?(::ODisk::File)
        elsif le.mtime > re.mtime
          pe = ph[name]
          if pe.nil? || pe.mtime == re.mtime
            # Don't know if the content or the stats changed so copy it.
            steps[name] = Step.new(name, Step::LOCAL, op) if le.is_a?(::ODisk::File)
          else
            ::Opee::Env.error("Conflict syncing #{ld.top_path}/#{name}. Both local and remote have changed.")
            steps[name] = Step.new(name, Step::LOCAL, Step::ERROR)
          end
        elsif le.mtime < re.mtime
          # Don't know if the content or the stats changed so copy it.
          steps[name] = Step.new(name, Step::REMOTE, op) if re.is_a?(::ODisk::File)
        else # same times but different can't be good
          ::Opee::Env.error("Conflict syncing #{ld.top_path}/#{name}. Both local and remote have changed.")
          steps[name] = Step.new(name, Step::LOCAL, Step::ERROR)
        end
      end
    end
  end
  steps.empty? ? nil : steps
end

Instance Method Details

- (Object) set_options(options)



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# File 'lib/odisk/planner.rb', line 15

def set_options(options)
  super(options)
  @dir_queue = options[:dir_queue]
  @copy_queue = options[:copy_queue]
  @crypt_queue = options[:crypt_queue]
  @inputs = options[:inputs]
  @fixer = options[:fixer]
end