Class: Assimilate::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/assimilate/command.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Command

Returns a new instance of Command.



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# File 'lib/assimilate/command.rb', line 6

def initialize
  @options = {}
  @parser = OptionParser.new do |opts|
    opts.banner = "Usage: assimilate [command] [options]"

    opts.on("--config FILENAME", String, "Catalog database configuration file") do |f|
      @options[:config] = f
    end

    opts.on("--id FIELDNAME", String, "Field name to be used for record identifier") do |f|
      @options[:idfield] = f
    end

    opts.on("--commit", "Commit changes to database") do
      @options[:commit] = true
    end

    opts.on("--key FIELDNAME", String, "(*extend* only; optional) Hash key to store extended attributes under") do |f|
      @options[:key] = f
    end

    opts.on("--datestamp DATESTRING", String, "(*load* only) Datestamp to record for file batch operation") do |s|
      @options[:datestamp] = s
    end

    opts.on("--domain STRING", String, "Domain value to apply to each record") do |s|
      @options[:domain] = s
    end

    opts.on("--compare FIELDNAME", String, "(*extend* only) Optional field to check whether an update is current (e.g. timestamp)") do |f|
      @options[:compare] = f
    end
  end
end

Instance Attribute Details

#command ⇒ Object (readonly)

Returns the value of attribute command.



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# File 'lib/assimilate/command.rb', line 4

def command
  @command
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/assimilate/command.rb', line 4

def options
  @options
end

Instance Method Details

#execute(command, options, filenames = nil) ⇒ Object 



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# File 'lib/assimilate/command.rb', line 54

def execute(command, options, filenames = nil)
  filename = filenames.first

  case command
  when 'load'
    raise OptionParser::MissingArgument, "missing datestamp" unless options[:datestamp]

    results = Assimilate.load(filename, options)
    logmessage(command, options, results)

  when 'extend'
    # keyfield is an *optional* parameter

    results = Assimilate.extend_data(filename, options)
    logmessage(command, options, results)


  else
    raise "unknown command #{command}"
  end
end

#idsummary(ids) ⇒ Object 



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# File 'lib/assimilate/command.rb', line 76

def idsummary(ids)
  if ids.any?
    "(#{ids.take(10).join(',')})"
  end
end

#logmessage(command, options, results) ⇒ Object 



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# File 'lib/assimilate/command.rb', line 82

def logmessage(command, options, results)
  $stderr.puts <<-EOT
assimilate #{command} for #{options[:domain]} using #{options[:idfield]}
EOT

  case command
  when 'load'
    $stderr.puts <<-EOT
  Original record count: #{results[:baseline_count]}
     Final record count: #{results[:final_count]}
      Unchanged records: #{results[:unchanged_count]}
            New records: #{results[:adds_count]} #{idsummary(results[:new_ids])}
                Deletes: #{results[:deletes_count]} #{idsummary(results[:deleted_ids])}
                Updates: #{results[:updates_count]} #{idsummary(results[:updated_ids])}
EOT
    if results[:updated_fields].any?
      $stderr.puts <<-EOT
          Counts by field:
EOT
      results[:updated_fields].each do |k,v|
        $stderr.puts <<-EOT
                      #{k}: #{v}
EOT
      end
    end
  when 'extend'
    $stderr.puts <<-EOT
  Original record count: #{results[:baseline_count]}
     Final record count: #{results[:final_count]}
        New identifiers: #{results[:adds_count]} #{options[:idfield]} (#{results[:new_ids].take(10).join(',')})
           Distinct ids: #{results[:distinct_ids]}
      Unchanged records: #{results[:unchanged_count]}
                Updates: #{results[:updates_count]}
EOT
    if results[:updated_fields].any?
      results[:updated_fields].each do |k,v|
        $stderr.puts <<-EOT
                      #{options[:key] && options[:key] + '.'}#{k}: #{v}
EOT
      end
    end
  else
    $stderr.puts results.inspect
  end
end

#parse(argv = ARGV) ⇒ Object

Raises:

  • (OptionParser::MissingArgument) 


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# File 'lib/assimilate/command.rb', line 41

def parse(argv = ARGV)
  @command = argv.shift
  filenames = @parser.parse(argv)

  raise OptionParser::MissingArgument, "missing config" unless options[:config]
  raise OptionParser::MissingArgument, "missing idfield" unless options[:idfield]
  raise OptionParser::MissingArgument, "missing domain" unless options[:domain]
  raise "missing filename" unless filenames.any?

  # argv remnants are filenames
  [@command, @options, filenames]
end