Python tornado.ioloop.IOLoop.instance() Examples

def run():
    app = Application([("/", RootHandler)])
    port = random.randrange(options.min_port, options.max_port)
    app.listen(port, address='127.0.0.1')
    signal.signal(signal.SIGCHLD, handle_sigchld)
    args = ["ab"]
    args.extend(["-n", str(options.n)])
    args.extend(["-c", str(options.c)])
    if options.keepalive:
        args.append("-k")
    if options.quiet:
        # just stops the progress messages printed to stderr
        args.append("-q")
    args.append("http://127.0.0.1:%d/" % port)
    subprocess.Popen(args)
    IOLoop.instance().start()
    IOLoop.instance().close()
    del IOLoop._instance
    assert not IOLoop.initialized() 

def listen(self, port, address="", **kwargs):
        """Starts an HTTP server for this application on the given port.

        This is a convenience alias for creating an `.HTTPServer`
        object and calling its listen method.  Keyword arguments not
        supported by `HTTPServer.listen <.TCPServer.listen>` are passed to the
        `.HTTPServer` constructor.  For advanced uses
        (e.g. multi-process mode), do not use this method; create an
        `.HTTPServer` and call its
        `.TCPServer.bind`/`.TCPServer.start` methods directly.

        Note that after calling this method you still need to call
        ``IOLoop.instance().start()`` to start the server.
        """
        # import is here rather than top level because HTTPServer
        # is not importable on appengine
        from tornado.httpserver import HTTPServer
        server = HTTPServer(self, **kwargs)
        server.listen(port, address) 

def start(self, init_callback):
        def _():
            try:
                if asyncio is not None:
                    loop = asyncio.new_event_loop()
                    asyncio.set_event_loop(loop)

                self.serve_thrift()
                self.serve_http()
                ioloop = IOLoop.instance()
                ioloop.add_callback(init_callback)
                ioloop.start()
            except Exception as e:
                logging.error("server error: %s", e)
                self.forsun.read_event.set()
                timer.stop()

        self.thread = threading.Thread(target=_)
        self.thread.setDaemon(True)
        self.thread.start() 

def __init__(self, io_loop=None):
        if not io_loop:
            io_loop = tornado.ioloop.IOLoop.instance()
        self._io_loop = io_loop
        self._readers = {}  # map of reader objects to fd
        self._writers = {}  # map of writer objects to fd
        self._fds = {}  # a map of fd to a (reader, writer) tuple
        self._delayedCalls = {}
        PosixReactorBase.__init__(self)

        # IOLoop.start() bypasses some of the reactor initialization.
        # Fire off the necessary events if they weren't already triggered
        # by reactor.run().
        def start_if_necessary():
            if not self._started:
                self.fireSystemEvent('startup')
        self._io_loop.add_callback(start_if_necessary)

    # IReactorTime 

def listen(self, port, address="", **kwargs):
        """Starts an HTTP server for this application on the given port.

        This is a convenience alias for creating an `.HTTPServer`
        object and calling its listen method.  Keyword arguments not
        supported by `HTTPServer.listen <.TCPServer.listen>` are passed to the
        `.HTTPServer` constructor.  For advanced uses
        (e.g. multi-process mode), do not use this method; create an
        `.HTTPServer` and call its
        `.TCPServer.bind`/`.TCPServer.start` methods directly.

        Note that after calling this method you still need to call
        ``IOLoop.instance().start()`` to start the server.
        """
        # import is here rather than top level because HTTPServer
        # is not importable on appengine
        from tornado.httpserver import HTTPServer
        server = HTTPServer(self, **kwargs)
        server.listen(port, address) 

def add_accept_handler(sock, callback, io_loop=None):
    """Adds an ``IOLoop`` event handler to accept new connections on ``sock``.

    When a connection is accepted, ``callback(connection, address)`` will
    be run (``connection`` is a socket object, and ``address`` is the
    address of the other end of the connection).  Note that this signature
    is different from the ``callback(fd, events)`` signature used for
    ``IOLoop`` handlers.
    """
    if io_loop is None:
        io_loop = IOLoop.instance()

    def accept_handler(fd, events):
        while True:
            try:
                connection, address = sock.accept()
            except socket.error, e:
                if e.args[0] in (errno.EWOULDBLOCK, errno.EAGAIN):
                    return
                raise
            callback(connection, address) 

def configure(impl, **kwargs):
        """Configures the AsyncHTTPClient subclass to use.

        AsyncHTTPClient() actually creates an instance of a subclass.
        This method may be called with either a class object or the
        fully-qualified name of such a class (or None to use the default,
        SimpleAsyncHTTPClient)

        If additional keyword arguments are given, they will be passed
        to the constructor of each subclass instance created.  The
        keyword argument max_clients determines the maximum number of
        simultaneous fetch() operations that can execute in parallel
        on each IOLoop.  Additional arguments may be supported depending
        on the implementation class in use.

        Example::

           AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
        """
        if isinstance(impl, (unicode, bytes_type)):
            impl = import_object(impl)
        if impl is not None and not issubclass(impl, AsyncHTTPClient):
            raise ValueError("Invalid AsyncHTTPClient implementation")
        AsyncHTTPClient._impl_class = impl
        AsyncHTTPClient._impl_kwargs = kwargs 

def main():
    parse_command_line()
    app = Application([('/', ChunkHandler)])
    app.listen(options.port, address='127.0.0.1')
    def callback(response):
        response.rethrow()
        assert len(response.body) == (options.num_chunks * options.chunk_size)
        logging.warning("fetch completed in %s seconds", response.request_time)
        IOLoop.instance().stop()

    logging.warning("Starting fetch with curl client")
    curl_client = CurlAsyncHTTPClient()
    curl_client.fetch('http://localhost:%d/' % options.port,
                      callback=callback)
    IOLoop.instance().start()

    logging.warning("Starting fetch with simple client")
    simple_client = SimpleAsyncHTTPClient()
    simple_client.fetch('http://localhost:%d/' % options.port,
                        callback=callback)
    IOLoop.instance().start() 

def shutdown(self):
    MAX_WAIT_SECONDS_BEFORE_SHUTDOWN = 3
    print('Stopping http server')
    self.http_server.stop()

    print('Will shutdown in %s seconds ...' % MAX_WAIT_SECONDS_BEFORE_SHUTDOWN)
    io_loop = IOLoop.instance()
    deadline = time.time() + MAX_WAIT_SECONDS_BEFORE_SHUTDOWN

    def stop_loop():
      now = time.time()
      if now < deadline and (io_loop._callbacks or io_loop._timeouts):
        io_loop.add_timeout(now + 1, stop_loop)
      else:
        io_loop.stop()
        print('Shutdown')
    stop_loop() 

def run():
    app = Application([("/", RootHandler)])
    port = random.randrange(options.min_port, options.max_port)
    app.listen(port, address='127.0.0.1')
    signal.signal(signal.SIGCHLD, handle_sigchld)
    args = ["ab"]
    args.extend(["-n", str(options.n)])
    args.extend(["-c", str(options.c)])
    if options.keepalive:
        args.append("-k")
    if options.quiet:
        # just stops the progress messages printed to stderr
        args.append("-q")
    args.append("http://127.0.0.1:%d/" % port)
    subprocess.Popen(args)
    IOLoop.instance().start()
    IOLoop.instance().close()
    del IOLoop._instance
    assert not IOLoop.initialized() 

def tearDown(self):
        # Clean up Subprocess, so it can be used again with a new ioloop.
        Subprocess.uninitialize()
        self.io_loop.clear_current()
        if (not IOLoop.initialized() or
                self.io_loop is not IOLoop.instance()):
            # Try to clean up any file descriptors left open in the ioloop.
            # This avoids leaks, especially when tests are run repeatedly
            # in the same process with autoreload (because curl does not
            # set FD_CLOEXEC on its file descriptors)
            self.io_loop.close(all_fds=True)
        super(AsyncTestCase, self).tearDown()
        # In case an exception escaped or the StackContext caught an exception
        # when there wasn't a wait() to re-raise it, do so here.
        # This is our last chance to raise an exception in a way that the
        # unittest machinery understands.
        self.__rethrow() 

def run_tests():
    url = options.url + '/getCaseCount'
    control_ws = yield websocket_connect(url, None)
    num_tests = int((yield control_ws.read_message()))
    logging.info('running %d cases', num_tests)
    msg = yield control_ws.read_message()
    assert msg is None

    for i in range(1, num_tests + 1):
        logging.info('running test case %d', i)
        url = options.url + '/runCase?case=%d&agent=%s' % (i, options.name)
        test_ws = yield websocket_connect(url, None, compression_options={})
        while True:
            message = yield test_ws.read_message()
            if message is None:
                break
            test_ws.write_message(message, binary=isinstance(message, bytes))

    url = options.url + '/updateReports?agent=%s' % options.name
    update_ws = yield websocket_connect(url, None)
    msg = yield update_ws.read_message()
    assert msg is None
    IOLoop.instance().stop() 

def tornado_schedule():
    from tornado.ioloop import IOLoop
    from apscheduler.schedulers.tornado import TornadoScheduler

    def tick():
        print('Tick! The time is: %s' % datetime.now())

    scheduler = TornadoScheduler()
    scheduler.add_job(tick, 'interval', seconds=3)
    scheduler.start()
    print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))

    # Execution will block here until Ctrl+C (Ctrl+Break on Windows) is pressed.
    try:
        IOLoop.instance().start()
    except (KeyboardInterrupt, SystemExit):
        pass 

def tearDown(self):
        # Clean up Subprocess, so it can be used again with a new ioloop.
        Subprocess.uninitialize()
        self.io_loop.clear_current()
        if (not IOLoop.initialized() or
                self.io_loop is not IOLoop.instance()):
            # Try to clean up any file descriptors left open in the ioloop.
            # This avoids leaks, especially when tests are run repeatedly
            # in the same process with autoreload (because curl does not
            # set FD_CLOEXEC on its file descriptors)
            self.io_loop.close(all_fds=True)
        super(AsyncTestCase, self).tearDown()
        # In case an exception escaped or the StackContext caught an exception
        # when there wasn't a wait() to re-raise it, do so here.
        # This is our last chance to raise an exception in a way that the
        # unittest machinery understands.
        self.__rethrow() 

def initialize(self):
        ''' Setup sessions, etc '''
        self.config = ConfigManager.instance() 

def handle_sigchld(sig, frame):
    IOLoop.instance().add_callback(IOLoop.instance().stop) 

def main():
    """Main entrypoint."""
    init_logging()
    create_app()
    IOLoop.instance().start() 

def stop():
        """Stop the websocket"""
        IOLoop.instance().stop() 

def create_app():
    """Create websocket tornado app."""
    app = WebsocketApplication()

    def terminate(*_):
        """Trigger shutdown."""
        IOLoop.instance().add_callback_from_signal(app.stop)

    signals = (signal.SIGHUP, signal.SIGTERM, signal.SIGINT)
    for sig in signals:
        signal.signal(sig, terminate)

    app.listen(8082) 

def initialize(self):
        ''' Setup sessions, etc '''
        self.config = ConfigManager.instance() 

def get_new_ioloop(self):
        """Creates a new `.IOLoop` for this test.  May be overridden in
        subclasses for tests that require a specific `.IOLoop` (usually
        the singleton `.IOLoop.instance()`).
        """
        return IOLoop() 

def tearDown(self):
        # Clean up Subprocess, so it can be used again with a new ioloop.
        Subprocess.uninitialize()
        self.loop.clear_current()
        if (not IOLoop.initialized() or
                self.loop is not IOLoop.instance()):
            # Try to clean up any file descriptors left open in the ioloop.
            # This avoids leaks, especially when tests are run repeatedly
            # in the same process with autoreload (because curl does not
            # set FD_CLOEXEC on its file descriptors)
            self.loop.close(all_fds=True)
        super(TornadoFactoryConnectTest, self).tearDown() 

def xtest_instance(self):
            """Green IOLoop.instance returns the right object"""
            loop = self.IOLoop.instance()
            if not t5asyncio:
                assert isinstance(loop, self.IOLoop)
            base_loop = BaseIOLoop.instance()
            assert base_loop is loop 

def main():
    define('port', default=9000, type=int, help='Port on which to listen.')
    parse_command_line()

    http_server = HTTPServer(WSGIContainer(app))
    http_server.listen(options.port)
    IOLoop.instance().start() 

def run(self):
        """
        Starts the flask server over Tornados WSGI Container interface
        Also provide websocket interface at /websocket for persistent
        connections

        To run this server just create an instance of Origami Class and call
        this function

        .. code-block:: python

            from origami_lib.origami import Origami

            app = Origami("My Model")
            app.run()


        Raises:
            OrigamiServerException: Exception when the port we are trying to \
                bind to is already in use.
        """
        try:
            port = constants.DEFAULT_PORT
            http_server = WSGIContainer(self.server)

            # Register a web application with websocket at /websocket
            server = Application([(r'/websocket', OrigamiWebSocketHandler),
                                  (r'/fass', FunctionServiceHandler),
                                  (r'.*', FallbackHandler,
                                   dict(fallback=http_server))])

            server.listen(port)
            print("Origami server running on port: {}".format(port))
            IOLoop.instance().start()
        except OSError:
            raise exceptions.OrigamiServerException(
                "ORIGAMI SERVER ERROR: Port {0} already in use.".format(port)) 

def tearDown(self):
        if (not IOLoop.initialized() or
            self.io_loop is not IOLoop.instance()):
            # Try to clean up any file descriptors left open in the ioloop.
            # This avoids leaks, especially when tests are run repeatedly
            # in the same process with autoreload (because curl does not
            # set FD_CLOEXEC on its file descriptors)
            self.io_loop.close(all_fds=True)
        super(AsyncTestCase, self).tearDown() 

def install(io_loop=None):
    """Install this package as the default Twisted reactor."""
    if not io_loop:
        io_loop = tornado.ioloop.IOLoop.instance()
    reactor = TornadoReactor(io_loop)
    from twisted.internet.main import installReactor
    installReactor(reactor)
    return reactor 

def start(self):
        old_current = IOLoop.current(instance=False)
        try:
            self._setup_logging()
            self.make_current()
            self.reactor.run()
        finally:
            if old_current is None:
                IOLoop.clear_current()
            else:
                old_current.make_current() 

def __new__(cls, io_loop=None, max_clients=None, force_instance=False,
                **kwargs):
        io_loop = io_loop or IOLoop.instance()
        if cls is AsyncHTTPClient:
            if cls._impl_class is None:
                from tornado.simple_httpclient import SimpleAsyncHTTPClient
                AsyncHTTPClient._impl_class = SimpleAsyncHTTPClient
            impl = AsyncHTTPClient._impl_class
        else:
            impl = cls
        if io_loop in impl._async_clients() and not force_instance:
            return impl._async_clients()[io_loop]
        else:
            instance = super(AsyncHTTPClient, cls).__new__(impl)
            args = {}
            if cls._impl_kwargs:
                args.update(cls._impl_kwargs)
            args.update(kwargs)
            if max_clients is not None:
                # max_clients is special because it may be passed
                # positionally instead of by keyword
                args["max_clients"] = max_clients
            elif "max_clients" not in args:
                args["max_clients"] = AsyncHTTPClient._DEFAULT_MAX_CLIENTS
            instance.initialize(io_loop, **args)
            if not force_instance:
                impl._async_clients()[io_loop] = instance
            return instance 

def get_new_ioloop(self):
        return IOLoop.instance()