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# Copyright 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 json
import logging
import threading
import traceback
import gear
from zuul.lib import commandsocket
from zuul.lib.config import get_default
from zuul.merger import merger
COMMANDS = ['stop']
class MergeServer(object):
log = logging.getLogger("zuul.MergeServer")
def __init__(self, config, connections={}):
self.config = config
merge_root = get_default(self.config, 'merger', 'git_dir',
'/var/lib/zuul/merger-git')
merge_email = get_default(self.config, 'merger', 'git_user_email')
merge_name = get_default(self.config, 'merger', 'git_user_name')
speed_limit = get_default(
config, 'merger', 'git_http_low_speed_limit', '1000')
speed_time = get_default(
config, 'merger', 'git_http_low_speed_time', '30')
self.merger = merger.Merger(
merge_root, connections, merge_email, merge_name, speed_limit,
speed_time)
self.command_map = dict(
stop=self.stop)
command_socket = get_default(
self.config, 'merger', 'command_socket',
'/var/lib/zuul/merger.socket')
self.command_socket = commandsocket.CommandSocket(command_socket)
def start(self):
self._running = True
self._command_running = True
server = self.config.get('gearman', 'server')
port = get_default(self.config, 'gearman', 'port', 4730)
ssl_key = get_default(self.config, 'gearman', 'ssl_key')
ssl_cert = get_default(self.config, 'gearman', 'ssl_cert')
ssl_ca = get_default(self.config, 'gearman', 'ssl_ca')
self.worker = gear.TextWorker('Zuul Merger')
self.worker.addServer(server, port, ssl_key, ssl_cert, ssl_ca)
self.log.debug("Waiting for server")
self.worker.waitForServer()
self.log.debug("Registering")
self.register()
self.log.debug("Starting command processor")
self.command_socket.start()
self.command_thread = threading.Thread(
target=self.runCommand, name='command')
self.command_thread.daemon = True
self.command_thread.start()
self.log.debug("Starting worker")
self.thread = threading.Thread(target=self.run)
self.thread.daemon = True
self.thread.start()
def register(self):
self.worker.registerFunction("merger:merge")
self.worker.registerFunction("merger:cat")
self.worker.registerFunction("merger:refstate")
def stop(self):
self.log.debug("Stopping")
self._running = False
self._command_running = False
self.command_socket.stop()
self.worker.shutdown()
self.log.debug("Stopped")
def join(self):
self.thread.join()
def runCommand(self):
while self._command_running:
try:
command = self.command_socket.get().decode('utf8')
if command != '_stop':
self.command_map[command]()
except Exception:
self.log.exception("Exception while processing command")
def run(self):
self.log.debug("Starting merge listener")
while self._running:
try:
job = self.worker.getJob()
try:
if job.name == 'merger:merge':
self.log.debug("Got merge job: %s" % job.unique)
self.merge(job)
elif job.name == 'merger:cat':
self.log.debug("Got cat job: %s" % job.unique)
self.cat(job)
elif job.name == 'merger:refstate':
self.log.debug("Got refstate job: %s" % job.unique)
self.refstate(job)
else:
self.log.error("Unable to handle job %s" % job.name)
job.sendWorkFail()
except Exception:
self.log.exception("Exception while running job")
job.sendWorkException(traceback.format_exc())
except gear.InterruptedError:
return
except Exception:
self.log.exception("Exception while getting job")
def merge(self, job):
args = json.loads(job.arguments)
ret = self.merger.mergeChanges(
args['items'], args.get('files'),
args.get('dirs'), args.get('repo_state'))
result = dict(merged=(ret is not None))
if ret is None:
result['commit'] = result['files'] = result['repo_state'] = None
else:
(result['commit'], result['files'], result['repo_state'],
recent) = ret
job.sendWorkComplete(json.dumps(result))
def refstate(self, job):
args = json.loads(job.arguments)
success, repo_state = self.merger.getRepoState(args['items'])
result = dict(updated=success,
repo_state=repo_state)
job.sendWorkComplete(json.dumps(result))
def cat(self, job):
args = json.loads(job.arguments)
self.merger.updateRepo(args['connection'], args['project'])
files = self.merger.getFiles(args['connection'], args['project'],
args['branch'], args['files'],
args.get('dirs'))
result = dict(updated=True,
files=files)
job.sendWorkComplete(json.dumps(result))
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