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#!/usr/bin/env python
#
# Copyright 2016 Confluent Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# derived from https://github.com/verisign/python-confluent-schemaregistry.git
#
import os
import os.path
import random
from datetime import datetime, timezone
from avro import schema
from avro.datafile import DataFileWriter
from avro.io import DatumWriter
NAMES = ['stefan', 'melanie', 'nick', 'darrel', 'kent', 'simon']
AGES = list(range(1, 10)) + [None]
def get_schema_path(fname):
dname = os.path.dirname(os.path.realpath(__file__))
return os.path.join(dname, fname)
def load_schema_file(fname):
fname = get_schema_path(fname)
with open(fname) as f:
return f.read()
avsc_dir = os.path.dirname(os.path.realpath(__file__))
BASIC_SCHEMA = load_schema_file(os.path.join(avsc_dir, 'basic_schema.avsc'))
def create_basic_item(i):
return {
'name': random.choice(NAMES) + '-' + str(i),
'number': random.choice(AGES)
}
BASIC_ITEMS = list(map(create_basic_item, range(1, 20)))
ADVANCED_SCHEMA = load_schema_file(os.path.join(avsc_dir, 'adv_schema.avsc'))
def create_adv_item(i):
friends = map(create_basic_item, range(1, 3))
family = map(create_basic_item, range(1, 3))
basic = create_basic_item(i)
basic['family'] = dict(map(lambda bi: (bi['name'], bi), family))
basic['friends'] = dict(map(lambda bi: (bi['name'], bi), friends))
basic['timestamp'] = datetime(1970, 1, 1, 0, 0, tzinfo=timezone.utc)
return basic
ADVANCED_ITEMS = list(map(create_adv_item, range(1, 20)))
def _write_items(base_name, schema_str, items):
avro_schema = schema.Parse(schema_str)
avro_file = base_name + '.avro'
with DataFileWriter(open(avro_file, "w"), DatumWriter(), avro_schema) as writer:
for i in items:
writer.append(i)
writer.close
return (avro_file)
def write_basic_items(base_name):
return _write_items(base_name, BASIC_SCHEMA, BASIC_ITEMS)
def write_advanced_items(base_name):
return _write_items(base_name, ADVANCED_SCHEMA, ADVANCED_ITEMS)
def cleanup(files):
for f in files:
try:
os.remove(f)
except OSError:
pass
if __name__ == "__main__":
write_advanced_items("advanced")
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