def _make_update_task(self, uda_class, cols, prior_state=None):
# Overall layout here:
# - task name
# - serialized agg class
# - prior state flag 1/0
# - (optional) serialized prior state
# - serialized table fragment
payload = BytesIO()
msg_writer = wire.PackedMessageWriter(payload)
msg_writer.string('agg-update')
msg_writer.string(pickle_dump(uda_class))
if prior_state is not None:
msg_writer.uint8(1)
msg_writer.string(pickle_dump(prior_state))
else:
msg_writer.uint8(0)
writer = IbisTableWriter(cols)
# Create memory map of the appropriate size
path = 'task_%s' % guid()
size = writer.total_size() + payload.tell()
offset = 0
mm = SharedMmap(path, size, create=True)
self.paths_to_delete.append(path)
mm.write(payload.getvalue())
writer.write(mm)
task = IbisTaskMessage(self.lock.semaphore_id, path, offset, size)
return task, mm
def _make_update_task(self, uda_class, cols, prior_state=None):
# Overall layout here:
# - task name
# - serialized agg class
# - prior state flag 1/0
# - (optional) serialized prior state
# - serialized table fragment
payload = BytesIO()
msg_writer = wire.PackedMessageWriter(payload)
msg_writer.string('agg-update')
msg_writer.string(compat.pickle_dump(uda_class))
if prior_state is not None:
msg_writer.uint8(1)
msg_writer.string(compat.pickle_dump(prior_state))
else:
msg_writer.uint8(0)
writer = IbisTableWriter(cols)
# Create memory map of the appropriate size
path = 'task_%s' % guid()
size = writer.total_size() + payload.tell()
offset = 0
mm = SharedMmap(path, size, create=True)
self.paths_to_delete.append(path)
mm.write(payload.getvalue())
writer.write(mm)
task = IbisTaskMessage(self.lock.semaphore_id, path, offset, size)
return task, mm
def test_file_interface(self):
path = guid()
self.to_nuke.append(path)
data = guid()
mm = SharedMmap(path, len(data), create=True)
assert mm.tell() == 0
mm.write(data)
assert mm.tell() == len(data)
mm.seek(0)
assert mm.tell() == 0
result = mm.read(16)
assert len(result) == 16
assert result == data[:16]
assert mm.tell() == 16
def test_file_interface(self):
path = guid()
self.to_nuke.append(path)
data = guid()
mm = SharedMmap(path, len(data), create=True)
assert mm.tell() == 0
mm.write(data)
assert mm.tell() == len(data)
mm.seek(0)
assert mm.tell() == 0
result = mm.read(16)
assert len(result) == 16
assert result == data[:16]
assert mm.tell() == 16
def _make_finalize_task(self, pickled):
payload = BytesIO()
msg_writer = wire.PackedMessageWriter(payload)
msg_writer.string('agg-finalize')
msg_writer.string(pickled)
# Create memory map of the appropriate size
path = 'task_%s' % guid()
size = payload.tell()
offset = 0
mm = SharedMmap(path, size, create=True)
self.paths_to_delete.append(path)
mm.write(payload.getvalue())
task = IbisTaskMessage(self.lock.semaphore_id, path, offset, size)
return task, mm
def _make_finalize_task(self, pickled):
payload = BytesIO()
msg_writer = wire.PackedMessageWriter(payload)
msg_writer.string('agg-finalize')
msg_writer.string(pickled)
# Create memory map of the appropriate size
path = 'task_%s' % guid()
size = payload.tell()
offset = 0
mm = SharedMmap(path, size, create=True)
self.paths_to_delete.append(path)
mm.write(payload.getvalue())
task = IbisTaskMessage(self.lock.semaphore_id, path, offset, size)
return task, mm
def test_multiple_mmaps(self):
path = guid()
path2 = guid()
data = guid()
self.to_nuke.extend([path, path2])
mm1 = SharedMmap(path, len(data), create=True)
mm1.write(data)
mm2 = SharedMmap(path, len(data))
result = mm2.read()
self.assertEqual(result, data)
# Open both maps first, see if data synchronizes
mm1 = SharedMmap(path2, len(data), create=True)
mm2 = SharedMmap(path2, len(data))
mm1.write(data)
result = mm2.read()
self.assertEqual(result, data)
def test_multiple_mmaps(self):
path = guid()
path2 = guid()
data = guid()
self.to_nuke.extend([path, path2])
mm1 = SharedMmap(path, len(data), create=True)
mm1.write(data)
mm2 = SharedMmap(path, len(data))
result = mm2.read()
self.assertEqual(result, data)
# Open both maps first, see if data synchronizes
mm1 = SharedMmap(path2, len(data), create=True)
mm2 = SharedMmap(path2, len(data))
mm1.write(data)
result = mm2.read()
self.assertEqual(result, data)
