Class: RR::UninstallRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/rubyrep/uninstall_runner.rb

Overview

This class implements the functionality of the ‘uninstall’ command.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#options ⇒ Object

Provided options. Possible values:

  • :config_file: path to config file



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# File 'lib/rubyrep/uninstall_runner.rb', line 16

def options
  @options
end

Class Method Details

.run(args) ⇒ Object

Entry points for executing a processing run. args: the array of command line options that were provided by the user.



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# File 'lib/rubyrep/uninstall_runner.rb', line 80

def self.run(args)
  runner = new

  status = runner.process_options(args)
  if runner.options
    runner.execute
  end
  status
end

Instance Method Details

#execute ⇒ Object

Removes all rubyrep created database objects.



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# File 'lib/rubyrep/uninstall_runner.rb', line 71

def execute
  initializer = ReplicationInitializer.new session
  initializer.restore_unconfigured_tables([])
  initializer.drop_infrastructure
  puts "Uninstall completed: rubyrep tables and triggers removed!"
end

#process_options(args) ⇒ Object

Parses the given command line parameter array. Returns the status (as per UNIX conventions: 1 if parameters were invalid, 0 otherwise)



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# File 'lib/rubyrep/uninstall_runner.rb', line 21

def process_options(args)
  status = 0
  self.options = {}

  parser = OptionParser.new do |opts|
    opts.banner = <<EOS
Usage: #{$0} uninstall [options]

  Removes all rubyrep tables, triggers, etc. from "left" and "right" database.
EOS
    opts.separator ""
    opts.separator "  Specific options:"

    opts.on("-c", "--config", "=CONFIG_FILE",
      "Mandatory. Path to configuration file.") do |arg|
      options[:config_file] = arg
    end

    opts.on_tail("--help", "Show this message") do
      $stderr.puts opts
      self.options = nil
    end
  end

  begin
    parser.parse!(args)
    if options # this will be +nil+ if the --help option is specified
      raise("Please specify configuration file") unless options.include?(:config_file)
    end
  rescue Exception => e
    $stderr.puts "Command line parsing failed: #{e}"
    $stderr.puts parser.help
    self.options = nil
    status = 1
  end

  return status
end

#session ⇒ Object

Returns the active Session. Loads config file and creates session if necessary.



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# File 'lib/rubyrep/uninstall_runner.rb', line 62

def session
  unless @session
    load options[:config_file]
    @session = Session.new Initializer.configuration
  end
  @session
end