def test_basics(self):
v = ('a' * 10, 'b' * 90)
pickler = coders.PickleCoder()
self.assertEquals(v, pickler.decode(pickler.encode(v)))
pickler = coders.Base64PickleCoder()
self.assertEquals(v, pickler.decode(pickler.encode(v)))
self.assertEquals(coders.Base64PickleCoder().encode(v),
base64.b64encode(coders.PickleCoder().encode(v)))
def test_create_do_avro_write(self):
output_path = self.create_temp_file('n/a')
elements = ['abc', 'def', 'ghi']
work_item = workitem.BatchWorkItem(None)
work_item.map_task = make_map_task([
maptask.WorkerRead(
inmemory.InMemorySource(
elements=[pickler.dumps(e) for e in elements],
start_index=2, # Start at the last element.
end_index=3),
output_coders=[self.OUTPUT_CODER]),
maptask.WorkerDoFn(serialized_fn=pickle_with_side_inputs(
ptransform.CallableWrapperDoFn(lambda x: ['XYZ: %s' % x])),
output_tags=['out'],
input=(0, 0),
side_inputs=None,
output_coders=[self.OUTPUT_CODER]),
make_text_sink(output_path,
input=(1, 0),
coder=coders.Base64PickleCoder())
])
executor.MapTaskExecutor(work_item.map_task).execute()
with open(output_path) as f:
self.assertEqual('XYZ: ghi', pickler.loads(f.read().strip()))
def _parse_avro_sink(specs, unused_codec_specs, unused_context):
# Note that the worker does not really implement AVRO yet.It takes
# advantage that both reading and writing is done through the worker to
# choose a supported format (text files with one pickled object per line).
if specs['@type'] == 'AvroSink':
return io.TextFileSink(specs['filename']['value'],
append_trailing_newlines=True,
coder=coders.Base64PickleCoder())
def test_create_do_with_side_avro_file_write(self):
input_path1 = self.create_temp_file('%s\n' % pickler.dumps('x'))
input_path2 = self.create_temp_file('%s\n' % pickler.dumps('y'))
elements = ['aa', 'bb']
output_buffer = []
executor.MapTaskExecutor().execute(
make_map_task([
maptask.WorkerRead(inmemory.InMemorySource(
elements=[pickler.dumps(e) for e in elements],
start_index=0,
end_index=2),
output_coders=[self.OUTPUT_CODER]),
maptask.WorkerDoFn(
serialized_fn=pickle_with_side_inputs(
ptransform.CallableWrapperDoFn(
lambda x, side: ['%s:%s' % (x, s) for s in side]),
tag_and_type=('sometag',
pvalue.IterablePCollectionView, ())),
output_tags=['out'],
input=(0, 0),
# Note that the two side inputs have the same tag. This is quite
# common for intermediary PCollections used as side inputs that
# are saved as AVRO files. The files will contain the sharded
# PCollection.
side_inputs=[
maptask.WorkerSideInputSource(fileio.TextFileSource(
file_path=input_path1,
coder=coders.Base64PickleCoder()),
tag='sometag'),
maptask.WorkerSideInputSource(fileio.TextFileSource(
file_path=input_path2,
coder=coders.Base64PickleCoder()),
tag='sometag')
],
output_coders=[self.OUTPUT_CODER]),
maptask.WorkerInMemoryWrite(
output_buffer=output_buffer,
input=(1, 0),
output_coders=(self.OUTPUT_CODER, ))
]))
# The side source was specified as collection therefore we should see
# all three elements of the side source.
self.assertEqual([u'aa:x', u'aa:y', u'bb:x', u'bb:y'],
sorted(output_buffer))
def _parse_avro_source(specs, unused_codec_specs, unused_context):
if specs['@type'] == 'AvroSource':
# Note that the worker does not really implement AVRO yet.It takes
# advantage that both reading and writing is done through the worker to
# choose a supported format (text files with one pickled object per line).
start_offset = None
if 'start_offset' in specs:
start_offset = int(specs['start_offset']['value'])
end_offset = None
if 'end_offset' in specs:
end_offset = int(specs['end_offset']['value'])
return io.TextFileSource(file_path=specs['filename']['value'],
start_offset=start_offset,
end_offset=end_offset,
strip_trailing_newlines=True,
coder=coders.Base64PickleCoder())
def __init__(self,
elements,
coder=coders.Base64PickleCoder(),
start_index=None,
end_index=None):
self.elements = elements
self.coder = coder
if start_index is None:
self.start_index = 0
else:
self.start_index = start_index
if end_index is None:
self.end_index = len(elements)
else:
self.end_index = end_index
def test_equality(self):
self.assertEquals(coders.PickleCoder(), coders.PickleCoder())
self.assertEquals(coders.Base64PickleCoder(),
coders.Base64PickleCoder())
self.assertNotEquals(coders.Base64PickleCoder(), coders.PickleCoder())
self.assertNotEquals(coders.Base64PickleCoder(), object())
