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import os
class SparkFiles(object):
"""
Resolves paths to files added through
L{SparkContext.addFile()<pyspark.context.SparkContext.addFile>}.
SparkFiles contains only classmethods; users should not create SparkFiles
instances.
"""
_root_directory = None
_is_running_on_worker = False
_sc = None
def __init__(self):
raise NotImplementedError("Do not construct SparkFiles objects")
@classmethod
def get(cls, filename):
"""
Get the absolute path of a file added through C{SparkContext.addFile()}.
"""
path = os.path.join(SparkFiles.getRootDirectory(), filename)
return os.path.abspath(path)
@classmethod
def getRootDirectory(cls):
"""
Get the root directory that contains files added through
C{SparkContext.addFile()}.
"""
if cls._is_running_on_worker:
return cls._root_directory
else:
# This will have to change if we support multiple SparkContexts:
return cls._sc._jvm.spark.SparkFiles.getRootDirectory()
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