ClickHouse/dbms/tests/integration/helpers/client.py

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import errno
import subprocess as sp
from threading import Timer
import tempfile
class Client:
def __init__(self, host, port=9000, command='/usr/bin/clickhouse-client'):
self.host = host
self.port = port
self.command = [command, '--host', self.host, '--port', str(self.port), '--stacktrace']
def query(self, sql, stdin=None, timeout=None, settings=None):
return self.get_query_request(sql, stdin=stdin, timeout=timeout, settings=settings).get_answer()
def get_query_request(self, sql, stdin=None, timeout=None, settings=None):
command = self.command[:]
if stdin is None:
command += ['--multiquery']
stdin = sql
else:
command += ['--query', sql]
if settings is not None:
for setting, value in settings.iteritems():
command += ['--' + setting, str(value)]
return CommandRequest(command, stdin, timeout)
class QueryTimeoutExceedException(Exception):
pass
class QueryRuntimeException(Exception):
pass
class CommandRequest:
def __init__(self, command, stdin=None, timeout=None):
# Write data to tmp file to avoid PIPEs and execution blocking
stdin_file = tempfile.TemporaryFile()
stdin_file.write(stdin)
stdin_file.seek(0)
self.stdout_file = tempfile.TemporaryFile()
self.stderr_file = tempfile.TemporaryFile()
#print " ".join(command)
self.process = sp.Popen(command, stdin=stdin_file, stdout=self.stdout_file, stderr=self.stderr_file)
self.timer = None
self.process_finished_before_timeout = True
if timeout is not None:
def kill_process():
if self.process.poll() is None:
self.process_finished_before_timeout = False
self.process.kill()
self.timer = Timer(timeout, kill_process)
self.timer.start()
def get_answer(self):
self.process.wait()
self.stdout_file.seek(0)
self.stderr_file.seek(0)
stdout = self.stdout_file.read()
stderr = self.stderr_file.read()
if self.timer is not None and not self.process_finished_before_timeout:
raise QueryTimeoutExceedException('Client timed out!')
if self.process.returncode != 0 or stderr:
raise QueryRuntimeException('Client failed! Return code: {}, stderr: {}'.format(self.process.returncode, stderr))
return stdout