py4j_signals_test.py
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# -*- coding: UTF-8 -*-
from __future__ import unicode_literals, absolute_import
from collections import defaultdict
import unittest
from py4j.java_gateway import (
server_connection_started, server_connection_stopped,
server_started, server_stopped, pre_server_shutdown, post_server_shutdown,
JavaGateway, GatewayParameters, CallbackServerParameters)
from py4j.clientserver import (
ClientServer, JavaParameters, PythonParameters)
from py4j.tests.client_server_test import (
clientserver_example_app_process)
from py4j.tests.java_callback_test import (
IHelloImpl, gateway_example_app_process)
from py4j.tests.py4j_callback_recursive_example import (
HelloState)
class MockListener(object):
def __init__(self, test_case):
self.test_case = test_case
self.received = defaultdict(int)
def started(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["server"] is not None)
self.received["started"] += 1
def connection_started(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["connection"] is not None)
self.received["connection_started"] += 1
def connection_stopped(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["connection"] is not None)
self.received["connection_stopped"] += 1
def stopped(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["server"] is not None)
self.received["stopped"] += 1
def pre_shutdown(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["server"] is not None)
self.received["pre_shutdown"] += 1
def post_shutdown(self, sender, **kwargs):
self.test_case.assertTrue(kwargs["server"] is not None)
self.received["post_shutdown"] += 1
class JavaGatewayTest(unittest.TestCase):
def test_all_regular_signals_auto_start(self):
listener = MockListener(self)
with gateway_example_app_process(None):
server_started.connect(listener.started)
gateway = JavaGateway(
gateway_parameters=GatewayParameters(),
callback_server_parameters=CallbackServerParameters())
server_stopped.connect(
listener.stopped, sender=gateway.get_callback_server())
server_connection_started.connect(
listener.connection_started,
sender=gateway.get_callback_server())
server_connection_stopped.connect(
listener.connection_stopped,
sender=gateway.get_callback_server())
pre_server_shutdown.connect(
listener.pre_shutdown, sender=gateway.get_callback_server())
post_server_shutdown.connect(
listener.post_shutdown, sender=gateway.get_callback_server())
example = gateway.entry_point.getNewExample()
impl = IHelloImpl()
self.assertEqual("This is Hello!", example.callHello(impl))
gateway.shutdown()
self.assertEqual(1, listener.received["started"])
self.assertEqual(1, listener.received["stopped"])
self.assertEqual(1, listener.received["pre_shutdown"])
self.assertEqual(1, listener.received["post_shutdown"])
self.assertEqual(1, listener.received["connection_started"])
self.assertEqual(1, listener.received["connection_stopped"])
class ClientServerTest(unittest.TestCase):
def test_all_regular_signals(self):
listener = MockListener(self)
server_started.connect(listener.started)
hello_state = HelloState()
client_server = ClientServer(
JavaParameters(), PythonParameters(), hello_state)
server_stopped.connect(
listener.stopped, sender=client_server.get_callback_server())
server_connection_started.connect(
listener.connection_started,
sender=client_server.get_callback_server())
server_connection_stopped.connect(
listener.connection_stopped,
sender=client_server.get_callback_server())
pre_server_shutdown.connect(
listener.pre_shutdown, sender=client_server.get_callback_server())
post_server_shutdown.connect(
listener.post_shutdown, sender=client_server.get_callback_server())
with clientserver_example_app_process(True):
client_server.shutdown()
self.assertEqual(1, listener.received["started"])
self.assertEqual(1, listener.received["stopped"])
self.assertEqual(1, listener.received["pre_shutdown"])
self.assertEqual(1, listener.received["post_shutdown"])
self.assertEqual(1, listener.received["connection_started"])
self.assertEqual(1, listener.received["connection_stopped"])
def test_signals_started_from_python(self):
listener = MockListener(self)
with clientserver_example_app_process():
server_started.connect(listener.started)
client_server = ClientServer(
JavaParameters(), PythonParameters())
example = client_server.entry_point.getNewExample()
impl = IHelloImpl()
self.assertEqual("This is Hello!", example.callHello(impl))
server_stopped.connect(
listener.stopped, sender=client_server.get_callback_server())
server_connection_started.connect(
listener.connection_started,
sender=client_server.get_callback_server())
server_connection_stopped.connect(
listener.connection_stopped,
sender=client_server.get_callback_server())
pre_server_shutdown.connect(
listener.pre_shutdown,
sender=client_server.get_callback_server())
post_server_shutdown.connect(
listener.post_shutdown,
sender=client_server.get_callback_server())
client_server.shutdown()
self.assertEqual(1, listener.received["started"])
self.assertEqual(1, listener.received["stopped"])
self.assertEqual(1, listener.received["pre_shutdown"])
self.assertEqual(1, listener.received["post_shutdown"])
# Connection initiated from JavaClient, so no signal sent.
self.assertEqual(0, listener.received["connection_started"])
self.assertEqual(0, listener.received["connection_stopped"])