heronpy/streamlet/resources.py

#!/usr/bin/env python
# -*- encoding: utf-8 -*-

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'''resources.py: module for defining resources'''

class Resources(object):
  """Resources needed by the topology are encapsulated in this class.
     Currently we deal with CPU and RAM. Others can be added later.
  """
  def __init__(self):
    self._cpu = 0.0
    self._ram = 0

  def set_cpu(self, cpu):
    self._cpu = float(cpu)
    return self

  def set_ram(self, ram):
    self._ram = int(ram)
    return self

  def get_cpu(self):
    return self._cpu

  def get_ram(self):
    return self._ram

  def set_ram_in_mb(self, ram):
    return self.set_ram(ram * 1024 * 1024)

  def set_ram_in_gb(self, ram):
    return self.set_ram_in_mb(ram * 1024)

  def __repr__(self):
    return 'Resource {cpu: %f, ram: %d}' % (self._cpu, self._ram)