ab9128fb7e
This PR enable auto_convert in JavaGateway, then we could register a converter for a given types, for example, date and datetime. There are two bugs related to auto_convert, see [1] and [2], we workaround it in this PR. [1] https://github.com/bartdag/py4j/issues/160 [2] https://github.com/bartdag/py4j/issues/161 cc rxin JoshRosen Author: Davies Liu <davies@databricks.com> Closes #5570 from davies/py4j_date and squashes the following commits: eb4fa53 [Davies Liu] fix tests in python 3 d17d634 [Davies Liu] rollback changes in mllib 2e7566d [Davies Liu] convert tuple into ArrayList ceb3779 [Davies Liu] Update rdd.py 3c373f3 [Davies Liu] support date and datetime by auto_convert cb094ff [Davies Liu] enable auto convert
599 lines
21 KiB
Python
599 lines
21 KiB
Python
#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import os
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from itertools import chain
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import time
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import operator
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import unittest
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import tempfile
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import struct
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from functools import reduce
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from pyspark.context import SparkConf, SparkContext, RDD
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from pyspark.streaming.context import StreamingContext
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from pyspark.streaming.kafka import KafkaUtils
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class PySparkStreamingTestCase(unittest.TestCase):
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timeout = 20 # seconds
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duration = 1
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def setUp(self):
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class_name = self.__class__.__name__
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conf = SparkConf().set("spark.default.parallelism", 1)
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self.sc = SparkContext(appName=class_name, conf=conf)
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self.sc.setCheckpointDir("/tmp")
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# TODO: decrease duration to speed up tests
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self.ssc = StreamingContext(self.sc, self.duration)
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def tearDown(self):
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self.ssc.stop()
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def wait_for(self, result, n):
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start_time = time.time()
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while len(result) < n and time.time() - start_time < self.timeout:
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time.sleep(0.01)
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if len(result) < n:
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print("timeout after", self.timeout)
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def _take(self, dstream, n):
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"""
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Return the first `n` elements in the stream (will start and stop).
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"""
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results = []
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def take(_, rdd):
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if rdd and len(results) < n:
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results.extend(rdd.take(n - len(results)))
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dstream.foreachRDD(take)
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self.ssc.start()
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self.wait_for(results, n)
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return results
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def _collect(self, dstream, n, block=True):
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"""
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Collect each RDDs into the returned list.
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:return: list, which will have the collected items.
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"""
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result = []
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def get_output(_, rdd):
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if rdd and len(result) < n:
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r = rdd.collect()
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if r:
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result.append(r)
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dstream.foreachRDD(get_output)
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if not block:
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return result
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self.ssc.start()
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self.wait_for(result, n)
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return result
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def _test_func(self, input, func, expected, sort=False, input2=None):
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"""
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@param input: dataset for the test. This should be list of lists.
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@param func: wrapped function. This function should return PythonDStream object.
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@param expected: expected output for this testcase.
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"""
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if not isinstance(input[0], RDD):
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input = [self.sc.parallelize(d, 1) for d in input]
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input_stream = self.ssc.queueStream(input)
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if input2 and not isinstance(input2[0], RDD):
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input2 = [self.sc.parallelize(d, 1) for d in input2]
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input_stream2 = self.ssc.queueStream(input2) if input2 is not None else None
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# Apply test function to stream.
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if input2:
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stream = func(input_stream, input_stream2)
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else:
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stream = func(input_stream)
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result = self._collect(stream, len(expected))
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if sort:
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self._sort_result_based_on_key(result)
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self._sort_result_based_on_key(expected)
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self.assertEqual(expected, result)
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def _sort_result_based_on_key(self, outputs):
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"""Sort the list based on first value."""
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for output in outputs:
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output.sort(key=lambda x: x[0])
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class BasicOperationTests(PySparkStreamingTestCase):
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def test_map(self):
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"""Basic operation test for DStream.map."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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def func(dstream):
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return dstream.map(str)
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expected = [list(map(str, x)) for x in input]
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self._test_func(input, func, expected)
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def test_flatMap(self):
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"""Basic operation test for DStream.faltMap."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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def func(dstream):
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return dstream.flatMap(lambda x: (x, x * 2))
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expected = [list(chain.from_iterable((map(lambda y: [y, y * 2], x))))
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for x in input]
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self._test_func(input, func, expected)
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def test_filter(self):
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"""Basic operation test for DStream.filter."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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def func(dstream):
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return dstream.filter(lambda x: x % 2 == 0)
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expected = [[y for y in x if y % 2 == 0] for x in input]
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self._test_func(input, func, expected)
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def test_count(self):
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"""Basic operation test for DStream.count."""
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input = [range(5), range(10), range(20)]
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def func(dstream):
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return dstream.count()
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expected = [[len(x)] for x in input]
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self._test_func(input, func, expected)
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def test_reduce(self):
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"""Basic operation test for DStream.reduce."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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def func(dstream):
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return dstream.reduce(operator.add)
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expected = [[reduce(operator.add, x)] for x in input]
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self._test_func(input, func, expected)
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def test_reduceByKey(self):
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"""Basic operation test for DStream.reduceByKey."""
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input = [[("a", 1), ("a", 1), ("b", 1), ("b", 1)],
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[("", 1), ("", 1), ("", 1), ("", 1)],
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[(1, 1), (1, 1), (2, 1), (2, 1), (3, 1)]]
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def func(dstream):
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return dstream.reduceByKey(operator.add)
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expected = [[("a", 2), ("b", 2)], [("", 4)], [(1, 2), (2, 2), (3, 1)]]
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self._test_func(input, func, expected, sort=True)
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def test_mapValues(self):
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"""Basic operation test for DStream.mapValues."""
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input = [[("a", 2), ("b", 2), ("c", 1), ("d", 1)],
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[(0, 4), (1, 1), (2, 2), (3, 3)],
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[(1, 1), (2, 1), (3, 1), (4, 1)]]
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def func(dstream):
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return dstream.mapValues(lambda x: x + 10)
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expected = [[("a", 12), ("b", 12), ("c", 11), ("d", 11)],
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[(0, 14), (1, 11), (2, 12), (3, 13)],
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[(1, 11), (2, 11), (3, 11), (4, 11)]]
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self._test_func(input, func, expected, sort=True)
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def test_flatMapValues(self):
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"""Basic operation test for DStream.flatMapValues."""
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input = [[("a", 2), ("b", 2), ("c", 1), ("d", 1)],
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[(0, 4), (1, 1), (2, 1), (3, 1)],
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[(1, 1), (2, 1), (3, 1), (4, 1)]]
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def func(dstream):
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return dstream.flatMapValues(lambda x: (x, x + 10))
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expected = [[("a", 2), ("a", 12), ("b", 2), ("b", 12),
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("c", 1), ("c", 11), ("d", 1), ("d", 11)],
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[(0, 4), (0, 14), (1, 1), (1, 11), (2, 1), (2, 11), (3, 1), (3, 11)],
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[(1, 1), (1, 11), (2, 1), (2, 11), (3, 1), (3, 11), (4, 1), (4, 11)]]
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self._test_func(input, func, expected)
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def test_glom(self):
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"""Basic operation test for DStream.glom."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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rdds = [self.sc.parallelize(r, 2) for r in input]
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def func(dstream):
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return dstream.glom()
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expected = [[[1, 2], [3, 4]], [[5, 6], [7, 8]], [[9, 10], [11, 12]]]
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self._test_func(rdds, func, expected)
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def test_mapPartitions(self):
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"""Basic operation test for DStream.mapPartitions."""
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input = [range(1, 5), range(5, 9), range(9, 13)]
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rdds = [self.sc.parallelize(r, 2) for r in input]
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def func(dstream):
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def f(iterator):
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yield sum(iterator)
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return dstream.mapPartitions(f)
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expected = [[3, 7], [11, 15], [19, 23]]
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self._test_func(rdds, func, expected)
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def test_countByValue(self):
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"""Basic operation test for DStream.countByValue."""
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input = [list(range(1, 5)) * 2, list(range(5, 7)) + list(range(5, 9)), ["a", "a", "b", ""]]
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def func(dstream):
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return dstream.countByValue()
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expected = [[4], [4], [3]]
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self._test_func(input, func, expected)
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def test_groupByKey(self):
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"""Basic operation test for DStream.groupByKey."""
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input = [[(1, 1), (2, 1), (3, 1), (4, 1)],
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[(1, 1), (1, 1), (1, 1), (2, 1), (2, 1), (3, 1)],
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[("a", 1), ("a", 1), ("b", 1), ("", 1), ("", 1), ("", 1)]]
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def func(dstream):
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return dstream.groupByKey().mapValues(list)
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expected = [[(1, [1]), (2, [1]), (3, [1]), (4, [1])],
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[(1, [1, 1, 1]), (2, [1, 1]), (3, [1])],
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[("a", [1, 1]), ("b", [1]), ("", [1, 1, 1])]]
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self._test_func(input, func, expected, sort=True)
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def test_combineByKey(self):
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"""Basic operation test for DStream.combineByKey."""
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input = [[(1, 1), (2, 1), (3, 1), (4, 1)],
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[(1, 1), (1, 1), (1, 1), (2, 1), (2, 1), (3, 1)],
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[("a", 1), ("a", 1), ("b", 1), ("", 1), ("", 1), ("", 1)]]
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def func(dstream):
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def add(a, b):
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return a + str(b)
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return dstream.combineByKey(str, add, add)
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expected = [[(1, "1"), (2, "1"), (3, "1"), (4, "1")],
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[(1, "111"), (2, "11"), (3, "1")],
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[("a", "11"), ("b", "1"), ("", "111")]]
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self._test_func(input, func, expected, sort=True)
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def test_repartition(self):
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input = [range(1, 5), range(5, 9)]
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rdds = [self.sc.parallelize(r, 2) for r in input]
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def func(dstream):
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return dstream.repartition(1).glom()
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expected = [[[1, 2, 3, 4]], [[5, 6, 7, 8]]]
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self._test_func(rdds, func, expected)
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def test_union(self):
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input1 = [range(3), range(5), range(6)]
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input2 = [range(3, 6), range(5, 6)]
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def func(d1, d2):
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return d1.union(d2)
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expected = [list(range(6)), list(range(6)), list(range(6))]
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self._test_func(input1, func, expected, input2=input2)
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def test_cogroup(self):
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input = [[(1, 1), (2, 1), (3, 1)],
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[(1, 1), (1, 1), (1, 1), (2, 1)],
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[("a", 1), ("a", 1), ("b", 1), ("", 1), ("", 1)]]
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input2 = [[(1, 2)],
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[(4, 1)],
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[("a", 1), ("a", 1), ("b", 1), ("", 1), ("", 2)]]
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def func(d1, d2):
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return d1.cogroup(d2).mapValues(lambda vs: tuple(map(list, vs)))
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expected = [[(1, ([1], [2])), (2, ([1], [])), (3, ([1], []))],
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[(1, ([1, 1, 1], [])), (2, ([1], [])), (4, ([], [1]))],
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[("a", ([1, 1], [1, 1])), ("b", ([1], [1])), ("", ([1, 1], [1, 2]))]]
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self._test_func(input, func, expected, sort=True, input2=input2)
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def test_join(self):
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input = [[('a', 1), ('b', 2)]]
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input2 = [[('b', 3), ('c', 4)]]
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def func(a, b):
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return a.join(b)
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expected = [[('b', (2, 3))]]
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self._test_func(input, func, expected, True, input2)
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def test_left_outer_join(self):
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input = [[('a', 1), ('b', 2)]]
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input2 = [[('b', 3), ('c', 4)]]
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def func(a, b):
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return a.leftOuterJoin(b)
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expected = [[('a', (1, None)), ('b', (2, 3))]]
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self._test_func(input, func, expected, True, input2)
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def test_right_outer_join(self):
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input = [[('a', 1), ('b', 2)]]
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input2 = [[('b', 3), ('c', 4)]]
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def func(a, b):
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return a.rightOuterJoin(b)
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expected = [[('b', (2, 3)), ('c', (None, 4))]]
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self._test_func(input, func, expected, True, input2)
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def test_full_outer_join(self):
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input = [[('a', 1), ('b', 2)]]
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input2 = [[('b', 3), ('c', 4)]]
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def func(a, b):
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return a.fullOuterJoin(b)
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expected = [[('a', (1, None)), ('b', (2, 3)), ('c', (None, 4))]]
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self._test_func(input, func, expected, True, input2)
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def test_update_state_by_key(self):
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def updater(vs, s):
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if not s:
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s = []
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s.extend(vs)
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return s
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input = [[('k', i)] for i in range(5)]
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def func(dstream):
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return dstream.updateStateByKey(updater)
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expected = [[0], [0, 1], [0, 1, 2], [0, 1, 2, 3], [0, 1, 2, 3, 4]]
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expected = [[('k', v)] for v in expected]
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self._test_func(input, func, expected)
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class WindowFunctionTests(PySparkStreamingTestCase):
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timeout = 20
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def test_window(self):
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input = [range(1), range(2), range(3), range(4), range(5)]
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def func(dstream):
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return dstream.window(3, 1).count()
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expected = [[1], [3], [6], [9], [12], [9], [5]]
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self._test_func(input, func, expected)
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def test_count_by_window(self):
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input = [range(1), range(2), range(3), range(4), range(5)]
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def func(dstream):
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return dstream.countByWindow(3, 1)
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expected = [[1], [3], [6], [9], [12], [9], [5]]
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self._test_func(input, func, expected)
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def test_count_by_window_large(self):
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input = [range(1), range(2), range(3), range(4), range(5), range(6)]
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def func(dstream):
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return dstream.countByWindow(5, 1)
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expected = [[1], [3], [6], [10], [15], [20], [18], [15], [11], [6]]
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self._test_func(input, func, expected)
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def test_count_by_value_and_window(self):
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input = [range(1), range(2), range(3), range(4), range(5), range(6)]
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def func(dstream):
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return dstream.countByValueAndWindow(5, 1)
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expected = [[1], [2], [3], [4], [5], [6], [6], [6], [6], [6]]
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self._test_func(input, func, expected)
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def test_group_by_key_and_window(self):
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input = [[('a', i)] for i in range(5)]
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def func(dstream):
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return dstream.groupByKeyAndWindow(3, 1).mapValues(list)
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expected = [[('a', [0])], [('a', [0, 1])], [('a', [0, 1, 2])], [('a', [1, 2, 3])],
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[('a', [2, 3, 4])], [('a', [3, 4])], [('a', [4])]]
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self._test_func(input, func, expected)
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def test_reduce_by_invalid_window(self):
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input1 = [range(3), range(5), range(1), range(6)]
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d1 = self.ssc.queueStream(input1)
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self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 0.1, 0.1))
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self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 1, 0.1))
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class StreamingContextTests(PySparkStreamingTestCase):
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duration = 0.1
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def _add_input_stream(self):
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inputs = [range(1, x) for x in range(101)]
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stream = self.ssc.queueStream(inputs)
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self._collect(stream, 1, block=False)
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def test_stop_only_streaming_context(self):
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self._add_input_stream()
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self.ssc.start()
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self.ssc.stop(False)
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self.assertEqual(len(self.sc.parallelize(range(5), 5).glom().collect()), 5)
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def test_stop_multiple_times(self):
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self._add_input_stream()
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self.ssc.start()
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self.ssc.stop()
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self.ssc.stop()
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def test_queue_stream(self):
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input = [list(range(i + 1)) for i in range(3)]
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dstream = self.ssc.queueStream(input)
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result = self._collect(dstream, 3)
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self.assertEqual(input, result)
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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))
|
|
|
|
|
|
class CheckpointTests(PySparkStreamingTestCase):
|
|
|
|
def setUp(self):
|
|
pass
|
|
|
|
def test_get_or_create(self):
|
|
inputd = tempfile.mkdtemp()
|
|
outputd = tempfile.mkdtemp() + "/"
|
|
|
|
def updater(vs, s):
|
|
return sum(vs, s or 0)
|
|
|
|
def setup():
|
|
conf = SparkConf().set("spark.default.parallelism", 1)
|
|
sc = SparkContext(conf=conf)
|
|
ssc = StreamingContext(sc, 0.5)
|
|
dstream = ssc.textFileStream(inputd).map(lambda x: (x, 1))
|
|
wc = dstream.updateStateByKey(updater)
|
|
wc.map(lambda x: "%s,%d" % x).saveAsTextFiles(outputd + "test")
|
|
wc.checkpoint(.5)
|
|
return ssc
|
|
|
|
cpd = tempfile.mkdtemp("test_streaming_cps")
|
|
self.ssc = ssc = StreamingContext.getOrCreate(cpd, setup)
|
|
ssc.start()
|
|
|
|
def check_output(n):
|
|
while not os.listdir(outputd):
|
|
time.sleep(0.1)
|
|
time.sleep(1) # make sure mtime is larger than the previous one
|
|
with open(os.path.join(inputd, str(n)), 'w') as f:
|
|
f.writelines(["%d\n" % i for i in range(10)])
|
|
|
|
while True:
|
|
p = os.path.join(outputd, max(os.listdir(outputd)))
|
|
if '_SUCCESS' not in os.listdir(p):
|
|
# not finished
|
|
time.sleep(0.01)
|
|
continue
|
|
ordd = ssc.sparkContext.textFile(p).map(lambda line: line.split(","))
|
|
d = ordd.values().map(int).collect()
|
|
if not d:
|
|
time.sleep(0.01)
|
|
continue
|
|
self.assertEqual(10, len(d))
|
|
s = set(d)
|
|
self.assertEqual(1, len(s))
|
|
m = s.pop()
|
|
if n > m:
|
|
continue
|
|
self.assertEqual(n, m)
|
|
break
|
|
|
|
check_output(1)
|
|
check_output(2)
|
|
ssc.stop(True, True)
|
|
|
|
time.sleep(1)
|
|
self.ssc = ssc = StreamingContext.getOrCreate(cpd, setup)
|
|
ssc.start()
|
|
check_output(3)
|
|
|
|
|
|
class KafkaStreamTests(PySparkStreamingTestCase):
|
|
|
|
def setUp(self):
|
|
super(KafkaStreamTests, self).setUp()
|
|
|
|
kafkaTestUtilsClz = self.ssc._jvm.java.lang.Thread.currentThread().getContextClassLoader()\
|
|
.loadClass("org.apache.spark.streaming.kafka.KafkaTestUtils")
|
|
self._kafkaTestUtils = kafkaTestUtilsClz.newInstance()
|
|
self._kafkaTestUtils.setup()
|
|
|
|
def tearDown(self):
|
|
if self._kafkaTestUtils is not None:
|
|
self._kafkaTestUtils.teardown()
|
|
self._kafkaTestUtils = None
|
|
|
|
super(KafkaStreamTests, self).tearDown()
|
|
|
|
def test_kafka_stream(self):
|
|
"""Test the Python Kafka stream API."""
|
|
topic = "topic1"
|
|
sendData = {"a": 3, "b": 5, "c": 10}
|
|
|
|
self._kafkaTestUtils.createTopic(topic)
|
|
self._kafkaTestUtils.sendMessages(topic, sendData)
|
|
|
|
stream = KafkaUtils.createStream(self.ssc, self._kafkaTestUtils.zkAddress(),
|
|
"test-streaming-consumer", {topic: 1},
|
|
{"auto.offset.reset": "smallest"})
|
|
|
|
result = {}
|
|
for i in chain.from_iterable(self._collect(stream.map(lambda x: x[1]),
|
|
sum(sendData.values()))):
|
|
result[i] = result.get(i, 0) + 1
|
|
|
|
self.assertEqual(sendData, result)
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|