def test_count(self):
"""Test that the count of records is correct."""
n_records = 500
for i, data in enumerate(mock_data(n_records, self.channel_count)):
buffer_server.append(self.pid,
Record(data=data, timestamp=i, rownum=None))
self.assertEqual(buffer_server.count(self.pid), n_records)
def test_count(self):
n = 500
for i in range(n):
d = self._new_data()
buffer_server.append(self.pid,
Record(data=d, timestamp=i, rownum=None))
self.assertEqual(buffer_server.count(self.pid), n)
def test_get_all_data(self):
n = 150
data = [self._new_data() for x in range(n)]
for i, d in enumerate(data):
buffer_server.append(self.pid,
Record(data=d, timestamp=i, rownum=None))
result = buffer_server.get_data(self.pid)
self.assertEqual([r.data for r in result], data, "Should return all \
data")
def test_get_all_data(self):
"""Test method to get all data from buffer."""
data = list(mock_data(n_records=150, n_cols=self.channel_count))
for record_index, record in enumerate(data):
buffer_server.append(
self.pid,
Record(data=record, timestamp=record_index, rownum=None))
result = buffer_server.get_data(self.pid)
self.assertEqual([r.data for r in result], data, "Should return all \
data")
def test_get_data_slice(self):
n = 150
data = [self._new_data() for x in range(n)]
for i, d in enumerate(data):
buffer_server.append(self.pid,
Record(data=d, timestamp=i, rownum=None))
start = 10
end = 20
result = buffer_server.get_data(self.pid,
start,
end,
field='timestamp')
self.assertEqual([r.data for r in result], data[start:end], "Should \
return the slice of data requested.")
def test_query_data(self):
n = 150
data = [self._new_data() for x in range(n)]
last_channel = self.channels[-1]
for i, d in enumerate(data):
d[-1] = 1.0 if i >= 100 else 0.0
buffer_server.append(self.pid,
Record(data=d, timestamp=i, rownum=None))
result = buffer_server.query(self.pid,
filters=[(last_channel, ">", 0)],
ordering=("timestamp", "asc"),
max_results=1)
self.assertEqual(len(result), 1)
self.assertEqual(result[0].data[-1], 1.0)
self.assertEqual(result[0].timestamp, 100.0)
def test_get_data_slice(self):
"""Test querying for a slice of data."""
data = list(mock_data(n_records=150, n_cols=self.channel_count))
for i, record in enumerate(data):
buffer_server.append(self.pid,
Record(data=record, timestamp=i, rownum=None))
start = 10
end = 20
result = buffer_server.get_data(self.pid,
start,
end,
field='timestamp')
self.assertEqual([r.data for r in result], data[start:end], "Should \
return the slice of data requested.")
def run(self):
"""Process startup. Connects to the device and start reading data.
Since this is done in a separate process from the main thread, any
errors encountered will be written to the msg_queue.
"""
try:
log.debug("Connecting to device")
self._connector.connect()
self._connector.acquisition_init()
except Exception as error:
self.msg_queue.put((MSG_ERROR, str(error)))
raise error
# Send updated device info to the main thread; this also signals that
# initialization is complete.
self.msg_queue.put((MSG_DEVICE_INFO, self._connector.device_info))
# Wait for db server start
self.msg_queue.get()
self.msg_queue = None
log.debug("Starting Acquisition read data loop")
sample = 0
data = self._connector.read_data()
# begin continuous acquisition process as long as data received
while self.running() and data:
sample += 1
if DEBUG and sample % DEBUG_FREQ == 0:
log.debug("Read sample: %s", str(sample))
buffer_server.append(self._buf,
Record(data, self._clock.getTime(), sample))
try:
# Read data again
data = self._connector.read_data()
# pylint: disable=broad-except
except Exception as error:
log.error("Error reading data from device: %s", str(error))
data = None
break
log.debug("Total samples read: %s", str(sample))
self._connector.disconnect()
def run(self):
"""Reads from the queue of data and performs processing an item at a
time. Also writes data to buffer."""
logging.debug("Starting Data Processing loop.")
count = 0
with self._processor as p:
while self.running():
try:
record = self._data_queue.get(True, self._wait)
count += 1
if DEBUG and count % DEBUG_FREQ == 0:
logging.debug("Processed sample: " + str(count))
buffer_server.append(self._buf, record)
p.process(record.data, record.timestamp)
self._data_queue.task_done()
except Empty:
pass
logging.debug("Total samples processed: " + str(count))
def test_multiple_servers(self):
"""Test multiple concurrent servers."""
pid2 = buffer_server.start(self.channels, self._next_buf_name())
n_records = 200
for count, data in enumerate(mock_data(n_records, self.channel_count)):
if count % 2 == 0:
buffer_server.append(self.pid, Record(data, count, None))
else:
buffer_server.append(pid2, Record(data, count, None))
self.assertEqual(buffer_server.count(self.pid), n_records / 2)
self.assertEqual(buffer_server.count(pid2), n_records / 2)
server1_data = buffer_server.get_data(self.pid, 0, 5)
server2_data = buffer_server.get_data(pid2, 0, 5)
self.assertNotEqual(server1_data, server2_data)
buffer_server.stop(pid2)
def test_query_data(self):
"""Test query_data method"""
data = list(mock_data(n_records=150, n_cols=self.channel_count))
last_channel = self.channels[-1]
for record_index, record in enumerate(data):
record[-1] = 1.0 if record_index >= 100 else 0.0
buffer_server.append(
self.pid,
Record(data=record, timestamp=record_index, rownum=None))
result = buffer_server.query(self.pid,
filters=[(last_channel, ">", 0)],
ordering=("timestamp", "asc"),
max_results=1)
self.assertEqual(len(result), 1)
self.assertEqual(result[0].data[-1], 1.0)
self.assertEqual(result[0].timestamp, 100.0)
def run(self):
"""Reads from the queue of data and performs processing an item at a
time. Also writes data to buffer."""
log.debug("Starting Data Processing loop.")
count = 0
with self._processor as processor:
# Signal that initialization is complete.
self._msg_queue.put((MSG_PROCESSOR_INITIALIZED, True))
while self.running():
try:
record = self._data_queue.get(True, self._wait)
count += 1
if DEBUG and count % DEBUG_FREQ == 0:
log.debug("Processed sample: %s", str(count))
buffer_server.append(self._buf, record)
processor.process(record.data, record.timestamp)
self._data_queue.task_done()
except Empty:
pass
log.debug("Total samples processed: %s", str(count))
def test_multiple_servers(self):
pid2 = buffer_server.start(self.channels, self._next_buf_name())
n = 200
for i in range(n):
d = [
np.random.uniform(-1000, 1000)
for cc in range(self.channel_count)
]
if i % 2 == 0:
buffer_server.append(self.pid, Record(d, i, None))
else:
buffer_server.append(pid2, Record(d, i, None))
self.assertEqual(buffer_server.count(self.pid), n / 2)
self.assertEqual(buffer_server.count(pid2), n / 2)
server1_data = buffer_server.get_data(self.pid, 0, 5)
server2_data = buffer_server.get_data(pid2, 0, 5)
self.assertNotEqual(server1_data, server2_data)
buffer_server.stop(pid2)