ClickHouse/dbms/tests/external_models/catboost/helpers/client.py

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import subprocess
import threading
import os
class ClickHouseClient:
def __init__(self, binary_path, port):
self.binary_path = binary_path
self.port = port
def query(self, query, timeout=10, pipe=None):
result = []
process = []
def run(path, port, text, result, in_pipe, process):
if in_pipe is None:
in_pipe = subprocess.PIPE
pipe = subprocess.Popen([path, 'client', '--port', str(port), '-q', text],
stdin=in_pipe, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
process.append(pipe)
stdout_data, stderr_data = pipe.communicate()
if stderr_data:
raise Exception('Error while executing query: {}\nstdout:\n{}\nstderr:\n{}'
.format(text, stdout_data, stderr_data))
result.append(stdout_data)
thread = threading.Thread(target=run, args=(self.binary_path, self.port, query, result, pipe, process))
thread.start()
thread.join(timeout)
if thread.isAlive():
if len(process):
process[0].kill()
thread.join()
raise Exception('timeout exceed for query: ' + query)
if len(result):
return result[0]