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reactor.py
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#
# 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 time
from proton.reactor import Container, ApplicationEvent, EventInjector, Selector, Backoff
from proton.handlers import Handshaker, MessagingHandler
from proton import Handler, Url, symbol
from .common import Test, SkipTest, TestServer, free_tcp_port, free_tcp_ports, ensureCanTestExtendedSASL
class Barf(Exception):
pass
class BarfOnInit:
def on_reactor_init(self, event):
raise Barf()
def on_connection_init(self, event):
raise Barf()
def on_session_init(self, event):
raise Barf()
def on_link_init(self, event):
raise Barf()
class BarfOnTask:
def on_timer_task(self, event):
raise Barf()
class BarfOnFinal:
init = False
def on_reactor_init(self, event):
self.init = True
def on_reactor_final(self, event):
raise Barf()
class BarfOnFinalDerived(Handshaker):
init = False
def on_reactor_init(self, event):
self.init = True
def on_reactor_final(self, event):
raise Barf()
class ExceptionTest(Test):
def setUp(self):
self.container = Container()
def test_reactor_final(self):
self.container.global_handler = BarfOnFinal()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_global_set(self):
self.container.global_handler = BarfOnInit()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_global_add(self):
self.container.global_handler.add(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_reactor_set(self):
self.container.handler = BarfOnInit()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_reactor_add(self):
self.container.handler.add(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_connection(self):
self.container.connection(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_connection_set(self):
c = self.container.connection()
c.handler = BarfOnInit()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_connection_add(self):
c = self.container.connection()
c.handler = object()
c.handler.add(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_session_set(self):
c = self.container.connection()
s = c.session()
s.handler = BarfOnInit()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_session_add(self):
c = self.container.connection()
s = c.session()
s.handler = object()
s.handler.add(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_link_set(self):
c = self.container.connection()
s = c.session()
l = s.sender("xxx")
l.handler = BarfOnInit()
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_link_add(self):
c = self.container.connection()
s = c.session()
l = s.sender("xxx")
l.handler = object()
l.handler.add(BarfOnInit())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_schedule(self):
self.container.schedule(0, BarfOnTask())
try:
self.container.run()
assert False, "expected to barf"
except Barf:
pass
def test_schedule_event(self):
class Nothing:
def __init__(self, p):
self.parent = p
results = []
def on_timer_task(self, event):
self.parent.triggered = True
assert event.context == self.parent.task
assert event.container == self.parent.container
self.task = self.container.schedule(0, Nothing(self))
self.container.run()
assert self.triggered
def test_schedule_many_nothings(self):
class Nothing:
results = []
def on_timer_task(self, event):
self.results.append(None)
num = 12345
for a in range(num):
self.container.schedule(0, Nothing())
self.container.run()
assert len(Nothing.results) == num
def test_schedule_many_nothing_refs(self):
class Nothing:
results = []
def on_timer_task(self, event):
self.results.append(None)
num = 12345
tasks = []
for a in range(num):
tasks.append(self.container.schedule(0, Nothing()))
self.container.run()
assert len(Nothing.results) == num
def test_schedule_many_nothing_refs_cancel_before_run(self):
class Nothing:
results = []
def on_timer_task(self, event):
self.results.append(None)
num = 12345
tasks = []
for a in range(num):
tasks.append(self.container.schedule(0, Nothing()))
for task in tasks:
task.cancel()
self.container.run()
assert len(Nothing.results) == 0
def test_schedule_cancel(self):
barf = self.container.schedule(10, BarfOnTask())
class CancelBarf:
def __init__(self, barf):
self.barf = barf
def on_timer_task(self, event):
self.barf.cancel()
pass
self.container.schedule(0, CancelBarf(barf))
start = time.time()
try:
self.container.run()
elapsed = time.time() - start
assert elapsed < 10, "should have cancelled immediately, took %ss" % elapsed
except Barf:
assert False, "expected barf to be cancelled"
def test_schedule_cancel_many(self):
num = 12345
barfs = set()
for a in range(num):
barf = self.container.schedule(10 * (a + 1), BarfOnTask())
class CancelBarf:
def __init__(self, barf):
self.barf = barf
def on_timer_task(self, event):
self.barf.cancel()
barfs.discard(self.barf)
pass
self.container.schedule(0, CancelBarf(barf))
barfs.add(barf)
start = time.time()
try:
self.container.run()
elapsed = time.time() - start
assert elapsed < num, "expected cancelled task to not delay the reactor by %s" % elapsed
assert not barfs, "expected all barfs to be discarded"
except Barf:
assert False, "expected barf to be cancelled"
class ApplicationEventTest(Test):
"""Test application defined events and handlers."""
class MyTestServer(TestServer):
def __init__(self):
super(ApplicationEventTest.MyTestServer, self).__init__()
class MyHandler(Handler):
def __init__(self, test):
super(ApplicationEventTest.MyHandler, self).__init__()
self._test = test
def on_hello(self, event):
# verify PROTON-1056
self._test.hello_rcvd = str(event)
def on_goodbye(self, event):
self._test.goodbye_rcvd = str(event)
def setUp(self):
import os
if not hasattr(os, 'pipe'):
# KAG: seems like Jython doesn't have an os.pipe() method
raise SkipTest()
if os.name == "nt":
# Correct implementation on Windows is complicated
raise SkipTest("PROTON-1071")
self.server = ApplicationEventTest.MyTestServer()
self.server.reactor.handler.add(ApplicationEventTest.MyHandler(self))
self.event_injector = EventInjector()
self.hello_event = ApplicationEvent("hello")
self.goodbye_event = ApplicationEvent("goodbye")
self.server.reactor.selectable(self.event_injector)
self.hello_rcvd = None
self.goodbye_rcvd = None
self.server.start()
def tearDown(self):
self.server.stop()
def _wait_for(self, predicate, timeout=10.0):
deadline = time.time() + timeout
while time.time() < deadline:
if predicate():
break
time.sleep(0.1)
assert predicate()
def test_application_events(self):
self.event_injector.trigger(self.hello_event)
self._wait_for(lambda: self.hello_rcvd is not None)
self.event_injector.trigger(self.goodbye_event)
self._wait_for(lambda: self.goodbye_rcvd is not None)
class AuthenticationTestHandler(MessagingHandler):
def __init__(self):
super(AuthenticationTestHandler, self).__init__()
port = free_tcp_port()
self.url = "localhost:%i" % port
self.verified = False
def on_start(self, event):
self.listener = event.container.listen(self.url)
def on_connection_opened(self, event):
event.connection.close()
def on_connection_opening(self, event):
assert event.connection.transport.user == "user@proton"
self.verified = True
def on_connection_closed(self, event):
event.connection.close()
self.listener.close()
def on_connection_error(self, event):
event.connection.close()
self.listener.close()
class ContainerTest(Test):
"""Test container subclass of reactor."""
def test_event_has_container_attribute(self):
ensureCanTestExtendedSASL()
class TestHandler(MessagingHandler):
def __init__(self):
super(TestHandler, self).__init__()
port = free_tcp_port()
self.url = "localhost:%i" % port
def on_start(self, event):
self.listener = event.container.listen(self.url)
def on_connection_closing(self, event):
event.connection.close()
self.listener.close()
test_handler = TestHandler()
container = Container(test_handler)
class ConnectionHandler(MessagingHandler):
def __init__(self):
super(ConnectionHandler, self).__init__()
def on_connection_opened(self, event):
event.connection.close()
assert event.container is event.reactor
assert event.container is container
container.connect(test_handler.url, handler=ConnectionHandler())
container.run()
def test_authentication_via_url(self):
ensureCanTestExtendedSASL()
test_handler = AuthenticationTestHandler()
container = Container(test_handler)
container.connect("%s:password@%s" % ("user%40proton", test_handler.url), reconnect=False)
container.run()
assert test_handler.verified
def test_authentication_via_container_attributes(self):
ensureCanTestExtendedSASL()
test_handler = AuthenticationTestHandler()
container = Container(test_handler)
container.user = "user@proton"
container.password = "password"
container.connect(test_handler.url, reconnect=False)
container.run()
assert test_handler.verified
def test_authentication_via_kwargs(self):
ensureCanTestExtendedSASL()
test_handler = AuthenticationTestHandler()
container = Container(test_handler)
container.connect(test_handler.url, user="user@proton", password="password", reconnect=False)
container.run()
assert test_handler.verified
class _ServerHandler(MessagingHandler):
def __init__(self, host):
super(ContainerTest._ServerHandler, self).__init__()
self.host = host
self.port = free_tcp_port()
self.client_addr = None
self.peer_hostname = None
def on_start(self, event):
self.listener = event.container.listen("%s:%s" % (self.host, self.port))
def on_connection_opened(self, event):
self.client_addr = event.connected_address
self.peer_hostname = event.connection.remote_hostname
def on_connection_closing(self, event):
event.connection.close()
self.listener.close()
class _ClientHandler(MessagingHandler):
def __init__(self):
super(ContainerTest._ClientHandler, self).__init__()
self.server_addr = None
self.errors = 0
def on_connection_opened(self, event):
self.server_addr = event.connected_address
event.connection.close()
def on_transport_error(self, event):
self.errors += 1
def test_numeric_hostname(self):
ensureCanTestExtendedSASL()
server_handler = ContainerTest._ServerHandler("127.0.0.1")
client_handler = ContainerTest._ClientHandler()
container = Container(server_handler)
container.connect(url="127.0.0.1:%s" % (server_handler.port),
handler=client_handler)
container.run()
assert server_handler.client_addr
assert client_handler.server_addr
assert server_handler.peer_hostname == "127.0.0.1", server_handler.peer_hostname
assert client_handler.server_addr.rsplit(':', 1)[1] == str(server_handler.port)
def test_non_numeric_hostname(self):
ensureCanTestExtendedSASL()
server_handler = ContainerTest._ServerHandler("localhost")
client_handler = ContainerTest._ClientHandler()
container = Container(server_handler)
container.connect(url="localhost:%s" % (server_handler.port),
handler=client_handler)
container.run()
assert server_handler.client_addr
assert client_handler.server_addr
assert server_handler.peer_hostname == "localhost", server_handler.peer_hostname
assert client_handler.server_addr.rsplit(':', 1)[1] == str(server_handler.port)
def test_virtual_host(self):
ensureCanTestExtendedSASL()
server_handler = ContainerTest._ServerHandler("localhost")
container = Container(server_handler)
conn = container.connect(url="localhost:%s" % (server_handler.port),
handler=ContainerTest._ClientHandler(),
virtual_host="a.b.c.org")
container.run()
assert server_handler.peer_hostname == "a.b.c.org", server_handler.peer_hostname
def test_no_virtual_host(self):
# explicitly setting an empty virtual host should prevent the hostname
# field from being sent in the Open performative when using the
# Python Container.
server_handler = ContainerTest._ServerHandler("localhost")
container = Container(server_handler)
conn = container.connect(url="localhost:%s" % (server_handler.port),
handler=ContainerTest._ClientHandler(),
virtual_host="")
container.run()
assert server_handler.peer_hostname is None, server_handler.peer_hostname
class _ReconnectServerHandler(MessagingHandler):
def __init__(self, host, listen_on_error=True):
super(ContainerTest._ReconnectServerHandler, self).__init__()
self.host = host
self.port = free_tcp_port()
self.client_addr = None
self.peer_hostname = None
self.listen_on_error = listen_on_error
def on_connection_opened(self, event):
self.client_addr = event.connected_address
self.peer_hostname = event.connection.remote_hostname
self.listener.close()
def on_connection_closing(self, event):
event.connection.close()
def listen(self, container):
if self.listen_on_error:
self.listener = container.listen("%s:%s" % (self.host, self.port))
class _ReconnectClientHandler(MessagingHandler):
def __init__(self, server_handler):
super(ContainerTest._ReconnectClientHandler, self).__init__()
self.connect_failed = False
self.server_addr = None
self.server_handler = server_handler
def on_connection_opened(self, event):
self.server_addr = event.connected_address
event.connection.close()
def on_transport_error(self, event):
assert self.connect_failed == False
self.connect_failed = True
self.server_handler.listen(event.container)
def test_failover(self):
server_handler = ContainerTest._ServerHandler("localhost")
client_handler = ContainerTest._ClientHandler()
free_ports = free_tcp_ports(2)
container = Container(server_handler)
container.connect(urls=["localhost:%s" % (free_ports[0]), "localhost:%s" % (free_ports[1]),
"localhost:%s" % (server_handler.port)],
handler=client_handler)
container.run()
assert server_handler.peer_hostname == 'localhost', server_handler.peer_hostname
assert client_handler.server_addr == Url(host='localhost', port=server_handler.port), client_handler.server_addr
def test_failover_fail(self):
client_handler = ContainerTest._ClientHandler()
free_ports = free_tcp_ports(2)
container = Container(client_handler)
start = time.time()
container.connect(urls=["localhost:%s" % (free_ports[0]), "localhost:%s" % (free_ports[1])],
reconnect=Backoff(max_tries=5),
handler=client_handler)
container.run()
end = time.time()
assert client_handler.errors == 10
# Total time for failure should be greater than but close to 3s
# would like to have an upper bound of about 3.2 too - but loaded CI machines can take a loooong time!
assert 3.0 < end - start, end - start
assert client_handler.server_addr is None, client_handler.server_addr
def test_failover_fail_custom_reconnect(self):
client_handler = ContainerTest._ClientHandler()
free_ports = free_tcp_ports(2)
container = Container(client_handler)
start = time.time()
container.connect(urls=["localhost:%s" % (free_ports[0]), "localhost:%s" % (free_ports[1])],
reconnect=[0, 0.5, 1],
handler=client_handler)
container.run()
end = time.time()
assert client_handler.errors == 6
# Total time for failure should be greater than but close to 3s
# would like to have an upper bound of about 3.2 too - but loaded CI machines can take a loooong time!
assert 3.0 < end - start, end - start
assert client_handler.server_addr is None, client_handler.server_addr
def test_reconnect(self):
server_handler = ContainerTest._ReconnectServerHandler("localhost", listen_on_error=True)
client_handler = ContainerTest._ReconnectClientHandler(server_handler)
container = Container(server_handler)
container.connect(url="localhost:%s" % (server_handler.port),
handler=client_handler)
container.run()
assert server_handler.peer_hostname == 'localhost', server_handler.peer_hostname
assert client_handler.connect_failed
assert client_handler.server_addr == Url(host='localhost', port=server_handler.port), client_handler.server_addr
def test_not_reconnecting(self):
server_handler = ContainerTest._ReconnectServerHandler("localhost", listen_on_error=False)
client_handler = ContainerTest._ReconnectClientHandler(server_handler)
container = Container(server_handler)
container.connect(url="localhost:%s" % (server_handler.port),
handler=client_handler, reconnect=False)
container.run()
assert server_handler.peer_hostname is None, server_handler.peer_hostname
assert client_handler.connect_failed
assert client_handler.server_addr is None, client_handler.server_addr
class SelectorTest(Test):
"""Test the Selector"""
def test_unicode_selector(self):
assert Selector(u"Hello").filter_set[symbol('selector')].value == u"Hello"
def test_non_unicode_selector(self):
assert Selector(b"Hello").filter_set[symbol('selector')].value == u"Hello"