class StreamingContextTests(PySparkStreamingTestCase):
duration = 0.1
setupCalled = False
def _add_input_stream(self):
inputs = [range(1, x) for x in range(101)]
stream = self.ssc.queueStream(inputs)
self._collect(stream, 1, block=False)
def test_stop_only_streaming_context(self):
self._add_input_stream()
self.ssc.start()
self.ssc.stop(False)
self.assertEqual(len(self.sc.parallelize(range(5), 5).glom().collect()), 5)
def test_stop_multiple_times(self):
self._add_input_stream()
self.ssc.start()
self.ssc.stop(False)
self.ssc.stop(False)
def test_queue_stream(self):
input = [list(range(i + 1)) for i in range(3)]
dstream = self.ssc.queueStream(input)
result = self._collect(dstream, 3)
self.assertEqual(input, result)
def test_text_file_stream(self):
d = tempfile.mkdtemp()
self.ssc = StreamingContext(self.sc, self.duration)
dstream2 = self.ssc.textFileStream(d).map(int)
result = self._collect(dstream2, 2, block=False)
self.ssc.start()
for name in ('a', 'b'):
time.sleep(1)
with open(os.path.join(d, name), "w") as f:
f.writelines(["%d\n" % i for i in range(10)])
self.wait_for(result, 2)
self.assertEqual([list(range(10)), list(range(10))], result)
def test_binary_records_stream(self):
d = tempfile.mkdtemp()
self.ssc = StreamingContext(self.sc, self.duration)
dstream = self.ssc.binaryRecordsStream(d, 10).map(
lambda v: struct.unpack("10b", bytes(v)))
result = self._collect(dstream, 2, block=False)
self.ssc.start()
for name in ('a', 'b'):
time.sleep(1)
with open(os.path.join(d, name), "wb") as f:
f.write(bytearray(range(10)))
self.wait_for(result, 2)
self.assertEqual([list(range(10)), list(range(10))], [list(v[0]) for v in result])
def test_union(self):
input = [list(range(i + 1)) for i in range(3)]
dstream = self.ssc.queueStream(input)
dstream2 = self.ssc.queueStream(input)
dstream3 = self.ssc.union(dstream, dstream2)
result = self._collect(dstream3, 3)
expected = [i * 2 for i in input]
self.assertEqual(expected, result)
def test_transform(self):
dstream1 = self.ssc.queueStream([[1]])
dstream2 = self.ssc.queueStream([[2]])
dstream3 = self.ssc.queueStream([[3]])
def func(rdds):
rdd1, rdd2, rdd3 = rdds
return rdd2.union(rdd3).union(rdd1)
dstream = self.ssc.transform([dstream1, dstream2, dstream3], func)
self.assertEqual([2, 3, 1], self._take(dstream, 3))
def test_transform_pairrdd(self):
# This regression test case is for SPARK-17756.
dstream = self.ssc.queueStream(
[[1], [2], [3]]).transform(lambda rdd: rdd.cartesian(rdd))
self.assertEqual([(1, 1), (2, 2), (3, 3)], self._take(dstream, 3))
def test_get_active(self):
self.assertEqual(StreamingContext.getActive(), None)
# Verify that getActive() returns the active context
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
# Verify that getActive() returns None
self.ssc.stop(False)
self.assertEqual(StreamingContext.getActive(), None)
# Verify that if the Java context is stopped, then getActive() returns None
self.ssc = StreamingContext(self.sc, self.duration)
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
self.ssc._jssc.stop(False)
self.assertEqual(StreamingContext.getActive(), None)
def test_get_active_or_create(self):
# Test StreamingContext.getActiveOrCreate() without checkpoint data
# See CheckpointTests for tests with checkpoint data
self.ssc = None
self.assertEqual(StreamingContext.getActive(), None)
def setupFunc():
ssc = StreamingContext(self.sc, self.duration)
ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.setupCalled = True
return ssc
# Verify that getActiveOrCreate() (w/o checkpoint) calls setupFunc when no context is active
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
# Verify that getActiveOrCreate() returns active context and does not call the setupFunc
self.ssc.start()
self.setupCalled = False
self.assertEqual(StreamingContext.getActiveOrCreate(None, setupFunc), self.ssc)
self.assertFalse(self.setupCalled)
# Verify that getActiveOrCreate() calls setupFunc after active context is stopped
self.ssc.stop(False)
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
# Verify that if the Java context is stopped, then getActive() returns None
self.ssc = StreamingContext(self.sc, self.duration)
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
self.ssc._jssc.stop(False)
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
def test_await_termination_or_timeout(self):
self._add_input_stream()
self.ssc.start()
self.assertFalse(self.ssc.awaitTerminationOrTimeout(0.001))
self.ssc.stop(False)
self.assertTrue(self.ssc.awaitTerminationOrTimeout(0.001))
class StreamingContextTests(PySparkStreamingTestCase):
duration = 0.1
setupCalled = False
def _add_input_stream(self):
inputs = [range(1, x) for x in range(101)]
stream = self.ssc.queueStream(inputs)
self._collect(stream, 1, block=False)
def test_stop_only_streaming_context(self):
self._add_input_stream()
self.ssc.start()
self.ssc.stop(False)
self.assertEqual(len(self.sc.parallelize(range(5), 5).glom().collect()), 5)
def test_stop_multiple_times(self):
self._add_input_stream()
self.ssc.start()
self.ssc.stop(False)
self.ssc.stop(False)
def test_queue_stream(self):
input = [list(range(i + 1)) for i in range(3)]
dstream = self.ssc.queueStream(input)
result = self._collect(dstream, 3)
self.assertEqual(input, result)
def test_text_file_stream(self):
d = tempfile.mkdtemp()
self.ssc = StreamingContext(self.sc, self.duration)
dstream2 = self.ssc.textFileStream(d).map(int)
result = self._collect(dstream2, 2, block=False)
self.ssc.start()
for name in ('a', 'b'):
time.sleep(1)
with open(os.path.join(d, name), "w") as f:
f.writelines(["%d\n" % i for i in range(10)])
self.wait_for(result, 2)
self.assertEqual([list(range(10)), list(range(10))], result)
def test_binary_records_stream(self):
d = tempfile.mkdtemp()
self.ssc = StreamingContext(self.sc, self.duration)
dstream = self.ssc.binaryRecordsStream(d, 10).map(
lambda v: struct.unpack("10b", bytes(v)))
result = self._collect(dstream, 2, block=False)
self.ssc.start()
for name in ('a', 'b'):
time.sleep(1)
with open(os.path.join(d, name), "wb") as f:
f.write(bytearray(range(10)))
self.wait_for(result, 2)
self.assertEqual([list(range(10)), list(range(10))], [list(v[0]) for v in result])
def test_union(self):
input = [list(range(i + 1)) for i in range(3)]
dstream = self.ssc.queueStream(input)
dstream2 = self.ssc.queueStream(input)
dstream3 = self.ssc.union(dstream, dstream2)
result = self._collect(dstream3, 3)
expected = [i * 2 for i in input]
self.assertEqual(expected, result)
def test_transform(self):
dstream1 = self.ssc.queueStream([[1]])
dstream2 = self.ssc.queueStream([[2]])
dstream3 = self.ssc.queueStream([[3]])
def func(rdds):
rdd1, rdd2, rdd3 = rdds
return rdd2.union(rdd3).union(rdd1)
dstream = self.ssc.transform([dstream1, dstream2, dstream3], func)
self.assertEqual([2, 3, 1], self._take(dstream, 3))
def test_transform_pairrdd(self):
# This regression test case is for SPARK-17756.
dstream = self.ssc.queueStream(
[[1], [2], [3]]).transform(lambda rdd: rdd.cartesian(rdd))
self.assertEqual([(1, 1), (2, 2), (3, 3)], self._take(dstream, 3))
def test_get_active(self):
self.assertEqual(StreamingContext.getActive(), None)
# Verify that getActive() returns the active context
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
# Verify that getActive() returns None
self.ssc.stop(False)
self.assertEqual(StreamingContext.getActive(), None)
# Verify that if the Java context is stopped, then getActive() returns None
self.ssc = StreamingContext(self.sc, self.duration)
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
self.ssc._jssc.stop(False)
self.assertEqual(StreamingContext.getActive(), None)
def test_get_active_or_create(self):
# Test StreamingContext.getActiveOrCreate() without checkpoint data
# See CheckpointTests for tests with checkpoint data
self.ssc = None
self.assertEqual(StreamingContext.getActive(), None)
def setupFunc():
ssc = StreamingContext(self.sc, self.duration)
ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.setupCalled = True
return ssc
# Verify that getActiveOrCreate() (w/o checkpoint) calls setupFunc when no context is active
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
# Verify that getActiveOrCreate() returns active context and does not call the setupFunc
self.ssc.start()
self.setupCalled = False
self.assertEqual(StreamingContext.getActiveOrCreate(None, setupFunc), self.ssc)
self.assertFalse(self.setupCalled)
# Verify that getActiveOrCreate() calls setupFunc after active context is stopped
self.ssc.stop(False)
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
# Verify that if the Java context is stopped, then getActive() returns None
self.ssc = StreamingContext(self.sc, self.duration)
self.ssc.queueStream([[1]]).foreachRDD(lambda rdd: rdd.count())
self.ssc.start()
self.assertEqual(StreamingContext.getActive(), self.ssc)
self.ssc._jssc.stop(False)
self.setupCalled = False
self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
self.assertTrue(self.setupCalled)
def test_await_termination_or_timeout(self):
self._add_input_stream()
self.ssc.start()
self.assertFalse(self.ssc.awaitTerminationOrTimeout(0.001))
self.ssc.stop(False)
self.assertTrue(self.ssc.awaitTerminationOrTimeout(0.001))
