def word_count():
tmp_dir = tempfile.gettempdir()
source_path = tmp_dir + '/streaming.csv'
if os.path.isfile(source_path):
os.remove(source_path)
content = "line Licensed to the Apache Software Foundation ASF under one " \
"line or more contributor license agreements See the NOTICE file " \
"line distributed with this work for additional information " \
"line regarding copyright ownership The ASF licenses this file " \
"to you under the Apache License Version the " \
"License you may not use this file except in compliance " \
"with the License"
with open(source_path, 'w') as f:
for word in content.split(" "):
f.write(",".join([word, "1"]))
f.write("\n")
f.flush()
f.close()
t_config = TableConfig.Builder().as_batch_execution().set_parallelism(
1).build()
t_env = TableEnvironment.create(t_config)
field_names = ["word", "cout"]
field_types = [DataTypes.STRING, DataTypes.LONG]
# register Orders table in table environment
t_env.register_table_source(
"Word", CsvTableSource(source_path, field_names, field_types))
# register Results table in table environment
tmp_dir = tempfile.gettempdir()
tmp_csv = tmp_dir + '/streaming2.csv'
if os.path.isfile(tmp_csv):
os.remove(tmp_csv)
t_env.register_table_sink("Results", field_names, field_types,
CsvTableSink(tmp_csv))
t_env.scan("Word") \
.group_by("word") \
.select("word, count(1) as count") \
.insert_into("Results")
t_env.execute()
def word_count():
content = "line Licensed to the Apache Software Foundation ASF under one " \
"line or more contributor license agreements See the NOTICE file " \
"line distributed with this work for additional information " \
"line regarding copyright ownership The ASF licenses this file " \
"to you under the Apache License Version the " \
"License you may not use this file except in compliance " \
"with the License"
t_config = TableConfig.Builder().as_batch_execution().build()
t_env = TableEnvironment.create(t_config)
# register Results table in table environment
tmp_dir = tempfile.gettempdir()
result_path = tmp_dir + '/result'
if os.path.exists(result_path):
try:
if os.path.isfile(result_path):
os.remove(result_path)
else:
shutil.rmtree(result_path)
except OSError as e:
logging.error("Error removing directory: %s - %s.", e.filename,
e.strerror)
logging.info("Results directory: %s", result_path)
t_env.connect(FileSystem().path(result_path)) \
.with_format(OldCsv()
.field_delimiter(',')
.field("word", DataTypes.STRING())
.field("count", DataTypes.BIGINT())) \
.with_schema(Schema()
.field("word", DataTypes.STRING())
.field("count", DataTypes.BIGINT())) \
.register_table_sink("Results")
elements = [(word, 1) for word in content.split(" ")]
t_env.from_elements(elements, ["word", "count"]) \
.group_by("word") \
.select("word, count(1) as count") \
.insert_into("Results")
t_env.execute()
def test_end_to_end():
tmp_dir = tempfile.gettempdir()
source_path = tmp_dir + '/streaming.csv'
if os.path.isfile(source_path):
os.remove(source_path)
with open(source_path, 'w') as f:
lines = '1,hi,hello\n' + '2,hi,hello\n'
f.write(lines)
f.close()
_find_flink_home()
print("using %s as FLINK_HOME..." % os.environ["FLINK_HOME"])
t_config = TableConfig.Builder().as_streaming_execution().set_parallelism(1).build()
t_env = TableEnvironment.get_table_environment(t_config)
field_names = ["a", "b", "c"]
field_types = [DataTypes.INT, DataTypes.STRING, DataTypes.STRING]
# register Orders table in table environment
t_env.register_table_source(
"Orders",
CsvTableSource(source_path, field_names, field_types))
# register Results table in table environment
tmp_dir = tempfile.gettempdir()
tmp_csv = tmp_dir + '/streaming2.csv'
if os.path.isfile(tmp_csv):
os.remove(tmp_csv)
t_env.register_table_sink(
"Results",
field_names, field_types, CsvTableSink(tmp_csv))
t_env.scan("Orders") \
.where("a > 0") \
.select("a + 1, b, c") \
.insert_into("Results")
t_env.execute()
with open(tmp_csv, 'r') as f:
lines = f.read()
assert lines == '2,hi,hello\n' + '3,hi,hello\n'
print("test passed, the log file is under this directory: %s/log" % os.environ["FLINK_HOME"])
def setUp(self):
super(PyFlinkBatchTableTestCase, self).setUp()
self.t_config = TableConfig.Builder().as_batch_execution(
).set_parallelism(1).build()
self.t_env = TableEnvironment.create(self.t_config)
def setUp(self):
super(PyFlinkStreamTableTestCase, self).setUp()
self.t_config = TableConfig.Builder().as_streaming_execution(
).set_parallelism(4).build()
self.t_env = TableEnvironment.get_table_environment(self.t_config)
