Class: PackageManager

Inherits:
Object
  • Object
show all
Defined in:
lib/JRubyR/package.rb

Defined Under Namespace

Classes: ParseXML

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PackageManager 



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# File 'lib/JRubyR/package.rb', line 135

def initialize
  @properties = Hash.new
  super
end

Instance Method Details

#http_download_uri(uri, filename) ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 214

def http_download_uri(uri, filename)
  puts "Starting HTTP download for: " + uri.to_s
  http_object = Net::HTTP.new(uri.host, uri.port)
  http_object.use_ssl = true if uri.scheme == 'https'
  begin
    http_object.start do |http|
      request = Net::HTTP::Get.new uri.request_uri
      http.read_timeout = 500
      http.request request do |response|
        open filename, 'wb' do |io|
          response.read_body do |chunk|
            io.write chunk
          end
        end
      end
    end
  rescue Exception => e
    puts "=> Exception: '#{e}'. Skipping download."
    return
  end
  puts "Stored download as " + filename + "."
end

#load_package(name) ⇒ Object

Installs a new package



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# File 'lib/JRubyR/package.rb', line 241

def load_package(name)

  # create the cran_dir if it does not already exists
  Dir.mkdir(SciCom.cran_dir) if !Dir.exists?(SciCom.cran_dir)

  # download address for Renjin packages
  renjin_cran = 'http://nexus.bedatadriven.com/content/groups/public/org/renjin/cran/'

  package = renjin_cran + name
  spec = package + "/" + "maven-metadata.xml"
  # read the maven-metadata specification
  uri = URI(spec)

  # parse the maven-metadata file
  parse = ParseXML.new(Net::HTTP.get(uri))
  parse.add_observer(self)
  parse.start

  download_dir = package + '/' + @properties['latest']
  spec2 = download_dir + '/' + "maven-metadata.xml"

  # parse the second maven-metadata file
  uri = URI(spec2)
  # download the spec file, so we know what version is actually installed
  http_download_uri(uri, SciCom.cran_dir + "/#{name}.xml")

  # need to clear the properties.  If the file has multiple properties with the same
  # name, then only the last one will be kept.  This might be a problem, but for 
  # now this does not seem to matter... We are only interested in the 'value'
  # property that seems to always be the same for the 'pom' and 'jar' files.
  @properties.clear
  parse = ParseXML.new(Net::HTTP.get(uri))
  parse.add_observer(self)
  parse.start
  
  filename = '/' + name + '-' + @properties['value'] + ".jar"

  download_file = download_dir + filename
  target_file = SciCom.cran_dir + '/' + name + ".jar"

  uri = URI.parse(download_file)
  http_download_uri(uri, target_file)

end

#new_text(text) ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 187

def new_text(text)
  @text = text
end

#set_value ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 162

def set_value
  @properties[@name] = @text
end

#tag_end(name) ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 179

def tag_end(name)
  value_read
end

#tag_start(name, value) ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 170

def tag_start(name, value)
  @name = name
  read_value
end

#update(type, name, attrs) ⇒ Object 



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# File 'lib/JRubyR/package.rb', line 195

def update(type, name, attrs)
  
  case type
  when :tag_start
    tag_start(name, attrs)
  when :tag_end
    tag_end(name)
  when :new_text
    new_text(name)
  else
    raise "Unknown type #{type}"
  end

end