heron/tools/cli/src/python/execute.py
def heron_tar(class_name, topology_tar, arguments, tmpdir_root, java_defines):
  '''
  :param class_name:
  :param topology_tar:
  :param arguments:
  :param tmpdir_root:
  :param java_defines:
  :return:
  '''
  # Extract tar to a tmp folder.
  tmpdir = tempfile.mkdtemp(dir=tmpdir_root, prefix='tmp')

  with contextlib.closing(tarfile.open(topology_tar)) as tar:
    tar.extractall(path=tmpdir)

  # A tar generated by pants has all dependency jars under libs/
  # in addition to the topology jar at top level. Pants keeps
  # filename for jar and tar the same except for extension.

  topology_jar = os.path.basename(topology_tar).replace(".tar.gz", "").replace(".tar", "") + ".jar"

  extra_jars = [
      os.path.join(tmpdir, topology_jar),
      os.path.join(tmpdir, "*"),
      os.path.join(tmpdir, "libs/*")
  ]

  lib_jars = config.get_heron_libs(jars.topology_jars())

  # Now execute the class
  return heron_class(class_name, lib_jars, extra_jars, arguments, java_defines)
def heron_tar(class_name, topology_tar, arguments, tmpdir_root, java_defines):
  '''
  :param class_name:
  :param topology_tar:
  :param arguments:
  :param tmpdir_root:
  :param java_defines:
  :return:
  '''
  # Extract tar to a tmp folder.
  tmpdir = tempfile.mkdtemp(dir=tmpdir_root, prefix='tmp')

  with contextlib.closing(tarfile.open(topology_tar)) as tar:
    tar.extractall(path=tmpdir)

  # A tar generated by pants has all dependency jars under libs/
  # in addition to the topology jar at top level. Pants keeps
  # filename for jar and tar the same except for extension.

  topology_jar = os.path.basename(topology_tar).replace(".tar.gz", "").replace(".tar", "") + ".jar"

  extra_jars = [
      os.path.join(tmpdir, topology_jar),
      os.path.join(tmpdir, "*"),
      os.path.join(tmpdir, "libs/*")
  ]

  lib_jars = config.get_heron_libs(jars.topology_jars())

  # Now execute the class
  return heron_class(class_name, lib_jars, extra_jars, arguments, java_defines)
:param class_name:
  :param topology_tar:
  :param arguments:
  :param tmpdir_root:
  :param java_defines:
  :return: