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#!/usr/bin/env python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2013-2014 OpenStack Foundation
#
# 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.
import signal
import sys
import zuul.cmd
import zuul.merger.server
# No zuul imports here because they pull in paramiko which must not be
# imported until after the daemonization.
# https://github.com/paramiko/paramiko/issues/59
# Similar situation with gear and statsd.
class Merger(zuul.cmd.ZuulDaemonApp):
app_name = 'merger'
app_description = 'A standalone Zuul merger.'
def createParser(self):
parser = super(Merger, self).createParser()
parser.add_argument('command',
choices=zuul.merger.server.COMMANDS,
nargs='?')
return parser
def parseArguments(self, args=None):
super(Merger, self).parseArguments()
if self.args.command:
self.args.nodaemon = True
def exit_handler(self, signum, frame):
self.merger.stop()
self.merger.join()
sys.exit(0)
def run(self):
# See comment at top of file about zuul imports
import zuul.merger.server
if self.args.command in zuul.merger.server.COMMANDS:
self.send_command(self.args.command)
sys.exit(0)
self.configure_connections(source_only=True)
self.setup_logging('merger', 'log_config')
self.merger = zuul.merger.server.MergeServer(self.config,
self.connections)
self.merger.start()
signal.signal(signal.SIGUSR2, zuul.cmd.stack_dump_handler)
if self.args.nodaemon:
signal.signal(signal.SIGTERM, self.exit_handler)
while True:
try:
signal.pause()
except KeyboardInterrupt:
print("Ctrl + C: asking merger to exit nicely...\n")
self.exit_handler(signal.SIGINT, None)
else:
self.merger.join()
def main():
Merger().main()
if __name__ == "__main__":
main()
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