Module: Priam::Command::Delete

Defined in:
lib/priam/command/delete.rb

Class Method Summary collapse

Class Method Details

.run(argv, input_stream = $stdin, output_stream = $stdout) ⇒ Object



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# File 'lib/priam/command/delete.rb', line 3

def self.run(argv, input_stream=$stdin, output_stream=$stdout)
  params = Priam::Core::Common.parse_opts(argv)
  host = params[:host]
  port = params[:port]
  keyspace = params[:keyspace]
  column_family = params[:column_family]
  super_column = params[:super_column]
  raise_exception_flag = params[:raise_exception_flag]
  check_exist_flag = params[:check_exist_flag]
  output_keys_flag = params[:output_keys_flag]

  client = Cassandra.new(keyspace, "#{host}:#{port}")
  
  Priam.logger.debug "Cluster Name: #{client.cluster_name}"
  Priam.logger.debug "Key Space   : #{keyspace}"
  
  count = 0
  
  while line = input_stream.gets do
    line.chomp!
    key = line
    begin
      if super_column then
        if check_exist_flag && !client.exists?(column_family, super_column, key) then
          Priam.logger.info " column '#{key}' does not exist"
        else
          client.remove(column_family, super_column, key)
          Priam.logger.info " removed column '#{key}'" if output_keys
          count +=1
        end
      elsif column_family then
        if check_exist_flag && !client.exists?(column_family, key) then
          Priam.logger.info " column '#{key}' does not exist"
        else
          client.remove(column_family, key)
          Priam.logger.info " removed column '#{key}'"
          count +=1
        end
      end
    rescue Exception=>e
      if raise_exception_flag then
        raise e
      else
        backtrace = e.backtrace.map{|s| "  #{s}"}.join("\n")
        Priam.logger.warn(" #{e.message}(#{e.class.name}): #{backtrace}")
        next
      end
    end
  end
  
  uri = "cassandra://#{host}:#{port}/#{keyspace}/#{column_family}"
  uri += "/#{super_column}" if super_column
  Priam.logger.info " removed #{count} columns from #{uri}"
end