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#!/usr/bin/env python
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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 os
import optparse
import sys
from optparse import IndentedHelpFormatter
from time import time, strftime, gmtime, sleep
from threading import Lock, Condition, Thread
from qpid.messaging import Connection
import qpid.messaging.exceptions
home = os.environ.get("QPID_TOOLS_HOME", os.path.normpath("/usr/share/qpid-tools"))
sys.path.append(os.path.join(home, "python"))
from qpidtoollibs.broker import EventHelper
class Printer(object):
"""
This class serializes printed lines so that events coming from different
threads don't overlap each other.
"""
def __init__(self):
self.lock = Lock()
def pr(self, text):
self.lock.acquire()
try:
print text
finally:
self.lock.release()
sys.stdout.flush()
class EventReceiver(Thread):
"""
One instance of this class is created for each broker that is being monitored.
This class does not use the "reconnect" option because it needs to report as
events when the connection is established and when it's lost.
"""
def __init__(self, printer, url, options):
Thread.__init__(self)
self.printer = printer
self.url = url
self.options = options
self.running = True
self.helper = EventHelper()
def cancel(self):
self.running = False
def run(self):
isOpen = False
while self.running:
try:
conn = Connection.establish(self.url, **self.options)
isOpen = True
self.printer.pr(strftime("%c", gmtime(time())) + " NOTIC qpid-printevents:brokerConnected broker=%s" % self.url)
sess = conn.session()
rx = sess.receiver(self.helper.eventAddress())
while self.running:
try:
msg = rx.fetch(1)
event = self.helper.event(msg)
self.printer.pr(event.__repr__())
sess.acknowledge()
except qpid.messaging.exceptions.Empty:
pass
except Exception, e:
if isOpen:
self.printer.pr(strftime("%c", gmtime(time())) + " NOTIC qpid-printevents:brokerDisconnected broker=%s" % self.url)
isOpen = False
sleep(1)
class JHelpFormatter(IndentedHelpFormatter):
"""
Format usage and description without stripping newlines from usage strings
"""
def format_usage(self, usage):
return usage
def format_description(self, description):
if description:
return description + "\n"
else:
return ""
_usage = "%prog [options] [broker-addr]..."
_description = \
"""
Collect and print events from one or more Qpid message brokers.
If no broker-addr is supplied, %prog connects to 'localhost:5672'.
[broker-addr] syntax:
[username/password@] hostname
ip-address [:<port>]
Examples:
$ %prog localhost:5672
$ %prog 10.1.1.7:10000
$ %prog guest/guest@broker-host:10000
"""
def main(argv=None):
p = optparse.OptionParser(usage=_usage, description=_description, formatter=JHelpFormatter())
p.add_option("--heartbeats", action="store_true", default=False, help="Use heartbeats.")
p.add_option("--sasl-mechanism", action="store", type="string", metavar="<mech>", help="SASL mechanism for authentication (e.g. EXTERNAL, ANONYMOUS, PLAIN, CRAM-MD, DIGEST-MD5, GSSAPI). SASL automatically picks the most secure available mechanism - use this option to override.")
p.add_option("--ssl-certificate", action="store", type="string", metavar="<cert>", help="Client SSL certificate (PEM Format)")
p.add_option("--ssl-key", action="store", type="string", metavar="<key>", help="Client SSL private key (PEM Format)")
p.add_option("--ha-admin", action="store_true", help="Allow connection to a HA backup broker.")
options, arguments = p.parse_args(args=argv)
if len(arguments) == 0:
arguments.append("localhost")
brokers = []
conn_options = {}
props = {}
printer = Printer()
if options.sasl_mechanism:
conn_options['sasl_mechanisms'] = options.sasl_mechanism
if options.ssl_certificate:
conn_options['ssl_certfile'] = options.ssl_certificate
if options.ssl_key:
if not options.ssl_certificate:
p.error("missing '--ssl-certificate' (required by '--ssl-key')")
conn_options['ssl_keyfile'] = options.ssl_key
if options.ha_admin:
props['qpid.ha-admin'] = 1
if options.heartbeats:
props['heartbeat'] = 5
if len(props) > 0:
conn_options['client_properties'] = props
try:
try:
for host in arguments:
er = EventReceiver(printer, host, conn_options)
brokers.append(er)
er.start()
while (True):
sleep(10)
except KeyboardInterrupt:
print
return 0
except Exception, e:
print "Failed: %s - %s" % (e.__class__.__name__, e)
return 1
finally:
for b in brokers:
b.cancel()
for b in brokers:
b.join()
if __name__ == '__main__':
sys.exit(main())
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