87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
#!/usr/bin/env python
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# Copyright 2013-2017 DataStax, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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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import logging
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log = logging.getLogger()
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log.setLevel('DEBUG')
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handler = logging.StreamHandler()
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handler.setFormatter(logging.Formatter("%(asctime)s [%(levelname)s] %(name)s: %(message)s"))
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log.addHandler(handler)
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from cassandra import ConsistencyLevel
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from cassandra.cluster import Cluster
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from cassandra.query import SimpleStatement
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KEYSPACE = "testkeyspace"
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def main():
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cluster = Cluster(['127.0.0.1'])
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session = cluster.connect()
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log.info("creating keyspace...")
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session.execute("""
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CREATE KEYSPACE IF NOT EXISTS %s
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WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '2' }
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""" % KEYSPACE)
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log.info("setting keyspace...")
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session.set_keyspace(KEYSPACE)
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log.info("creating table...")
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session.execute("""
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CREATE TABLE IF NOT EXISTS mytable (
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thekey text,
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col1 text,
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col2 text,
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PRIMARY KEY (thekey, col1)
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)
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""")
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query = SimpleStatement("""
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INSERT INTO mytable (thekey, col1, col2)
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VALUES (%(key)s, %(a)s, %(b)s)
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""", consistency_level=ConsistencyLevel.ONE)
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prepared = session.prepare("""
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INSERT INTO mytable (thekey, col1, col2)
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VALUES (?, ?, ?)
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""")
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for i in range(10):
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log.info("inserting row %d" % i)
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session.execute(query, dict(key="key%d" % i, a='a', b='b'))
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session.execute(prepared, ("key%d" % i, 'b', 'b'))
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future = session.execute_async("SELECT * FROM mytable")
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log.info("key\tcol1\tcol2")
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log.info("---\t----\t----")
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try:
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rows = future.result()
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except Exception:
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log.exception("Error reading rows:")
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return
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for row in rows:
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log.info('\t'.join(row))
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session.execute("DROP KEYSPACE " + KEYSPACE)
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if __name__ == "__main__":
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main()
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