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# The MIT License
#
# Copyright 2012 Sony Mobile Communications. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
""" Gerrit event stream interface.
Class to listen to the Gerrit event stream and dispatch events.
"""
from threading import Thread, Event
from .events import ErrorEvent
class GerritStream(Thread):
""" Gerrit events stream handler. """
def __init__(self, gerrit, ssh_client):
Thread.__init__(self)
self.daemon = True
self._gerrit = gerrit
self._ssh_client = ssh_client
self._stop = Event()
def stop(self):
""" Stop the thread. """
self._stop.set()
def _error_event(self, error):
""" Dispatch `error` to the Gerrit client. """
self._gerrit.put_event(ErrorEvent.error_json(error))
def run(self):
""" Listen to the stream and send events to the client. """
channel = self._ssh_client.get_transport().open_session()
channel.exec_command("gerrit stream-events")
stdout = channel.makefile()
stderr = channel.makefile_stderr()
while not self._stop.is_set():
try:
if channel.exit_status_ready():
if channel.recv_stderr_ready():
error = stderr.readline().strip()
else:
error = "Remote server connection closed"
self._error_event(error)
self._stop.set()
else:
data = stdout.readline()
self._gerrit.put_event(data)
except Exception as e:
self._error_event(repr(e))
self._stop.set()
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