本文整理汇总了Python中cassandra.connection.Connection类的典型用法代码示例。如果您正苦于以下问题：Python Connection类的具体用法？Python Connection怎么用？Python Connection使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Connection类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._iobuf = StringIO()
self._write_queue = Queue()
self._callbacks = {}
self._push_watchers = defaultdict(set)
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if self.ssl_options:
if not ssl:
raise Exception("This version of Python was not compiled with SSL support")
self._socket = ssl.wrap_socket(self._socket, **self.ssl_options)
self._socket.settimeout(1.0) # TODO potentially make this value configurable
self._socket.connect((self.host, self.port))
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
self._read_watcher = gevent.spawn(lambda: self.handle_read())
self._write_watcher = gevent.spawn(lambda: self.handle_write())
self._send_options_message()示例2: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._write_queue = Queue()
self._callbacks = {}
self._push_watchers = defaultdict(set)
sockerr = None
addresses = socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM)
for (af, socktype, proto, canonname, sockaddr) in addresses:
try:
self._socket = socket.socket(af, socktype, proto)
if self.ssl_options:
self._socket = ssl.wrap_socket(self._socket, **self.ssl_options)
self._socket.settimeout(1.0)
self._socket.connect(sockaddr)
sockerr = None
break
except socket.error as err:
sockerr = err
if sockerr:
raise socket.error(sockerr.errno, "Tried connecting to %s. Last error: %s" % ([a[4] for a in addresses], sockerr.strerror))
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
self._read_watcher = gevent.spawn(self.handle_read)
self._write_watcher = gevent.spawn(self.handle_write)
self._send_options_message()示例3: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self._write_queue = Queue()
sockerr = None
addresses = socket.getaddrinfo(
self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM
)
for (af, socktype, proto, canonname, sockaddr) in addresses:
try:
self._socket = socket.socket(af, socktype, proto)
self._socket.settimeout(1.0)
self._socket.connect(sockaddr)
sockerr = None
break
except socket.error as err:
sockerr = err
if sockerr:
raise socket.error(
sockerr.errno,
"Tried connecting to %s. Last error: %s" % (
[a[4] for a in addresses], sockerr.strerror)
)
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
self._read_watcher = eventlet.spawn(lambda: self.handle_read())
self._write_watcher = eventlet.spawn(lambda: self.handle_write())
self._send_options_message()示例4: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._iobuf = StringIO()
self._callbacks = {}
self._push_watchers = defaultdict(set)
self.deque = deque()
self._deque_lock = Lock()
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if self.ssl_options:
if not ssl:
raise Exception("This version of Python was not compiled with SSL support")
self._socket = ssl.wrap_socket(self._socket, **self.ssl_options)
self._socket.settimeout(1.0) # TODO potentially make this value configurable
self._socket.connect((self.host, self.port))
self._socket.setblocking(0)
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
with _loop_lock:
self._read_watcher = libev.IO(self._socket._sock, libev.EV_READ, _loop, self.handle_read)
self._write_watcher = libev.IO(self._socket._sock, libev.EV_WRITE, _loop, self.handle_write)
self._send_options_message()
self.__class__._connection_created(self)
# start the global event loop if needed
_start_loop()
_loop_notifier.send()示例5: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._callbacks = {}
self._push_watchers = defaultdict(set)
self.deque = deque()
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._socket.connect((self.host, self.port))
self._socket.setblocking(0)
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
self._read_watcher = libev.IO(self._socket._sock, libev.EV_READ, _loop, self.handle_read)
self._write_watcher = libev.IO(self._socket._sock, libev.EV_WRITE, _loop, self.handle_write)
with _loop_lock:
self._read_watcher.start()
self._write_watcher.start()
self._send_options_message()
# start the global event loop if needed
if not _start_loop():
# if the loop was already started, notify it
with _loop_lock:
_loop_notifier.send()示例6: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
asyncore.dispatcher.__init__(self)
self.connected_event = Event()
self._callbacks = {}
self.deque = deque()
self.deque_lock = Lock()
self._loop.connection_created(self)
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect((self.host, self.port))
self.add_channel()
if self.sockopts:
for args in self.sockopts:
self.socket.setsockopt(*args)
self._writable = True
self._readable = True
# start the event loop if needed
self._loop.maybe_start()示例7: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
asyncore.dispatcher.__init__(self)
self.connected_event = Event()
self._callbacks = {}
self._push_watchers = defaultdict(set)
self.deque = deque()
with _starting_conns_lock:
_starting_conns.add(self)
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect((self.host, self.port))
if self.sockopts:
for args in self.sockopts:
self.socket.setsockopt(*args)
self._writable = True
self._readable = True
# start the global event loop if needed
_start_loop()示例8: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
asyncore.dispatcher.__init__(self)
self.deque = deque()
self.deque_lock = Lock()
sockerr = None
addresses = socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM)
for (af, socktype, proto, canonname, sockaddr) in addresses:
try:
self.create_socket(af, socktype)
self.connect(sockaddr)
sockerr = None
break
except socket.error as err:
sockerr = err
if sockerr:
raise socket.error(sockerr.errno, "Tried connecting to %s. Last error: %s" % ([a[4] for a in addresses], sockerr.strerror))
self.add_channel()
if self.sockopts:
for args in self.sockopts:
self.socket.setsockopt(*args)
self._writable = True
self._readable = True
# start the event loop if needed
self._loop.maybe_start()示例9: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self._write_queue = Queue()
self._connect_socket()
self._read_watcher = eventlet.spawn(lambda: self.handle_read())
self._write_watcher = eventlet.spawn(lambda: self.handle_write())
self._send_options_message()示例10: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._write_queue = Queue()
self._callbacks = {}
self._push_watchers = defaultdict(set)
self._connect_socket()
self._read_watcher = eventlet.spawn(lambda: self.handle_read())
self._write_watcher = eventlet.spawn(lambda: self.handle_write())
self._send_options_message()示例11: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.deque = deque()
self.deque_lock = Lock()
self._connect_socket()
asyncore.dispatcher.__init__(self, self._socket, _dispatcher_map)
self._writable = True
self._readable = True
self._send_options_message()
# start the event loop if needed
self._loop.maybe_start()示例12: __init__
def __init__(self, *args, **kwargs):
"""
Initialization method.
Note that we can't call reactor methods directly here because
it's not thread-safe, so we schedule the reactor/connection
stuff to be run from the event loop thread when it gets the
chance.
"""
Connection.__init__(self, *args, **kwargs)
self.is_closed = True
self.connector = None
reactor.callFromThread(self.add_connection)
self._loop.maybe_start()示例13: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self._connect_socket()
self._socket.setblocking(0)
self._write_queue = asyncio.Queue(loop=self._loop)
# see initialize_reactor -- loop is running in a separate thread, so we
# have to use a threadsafe call
self._read_watcher = asyncio.run_coroutine_threadsafe(
self.handle_read(), loop=self._loop
)
self._write_watcher = asyncio.run_coroutine_threadsafe(
self.handle_write(), loop=self._loop
)
self._send_options_message()示例14: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.deque = deque()
self._deque_lock = Lock()
self._connect_socket()
self._socket.setblocking(0)
with self._libevloop._lock:
self._read_watcher = libev.IO(self._socket.fileno(), libev.EV_READ, self._libevloop._loop, self.handle_read)
self._write_watcher = libev.IO(self._socket.fileno(), libev.EV_WRITE, self._libevloop._loop, self.handle_write)
self._send_options_message()
self._libevloop.connection_created(self)
# start the global event loop if needed
self._libevloop.maybe_start()示例15: __init__
def __init__(self, *args, **kwargs):
Connection.__init__(self, *args, **kwargs)
self.connected_event = Event()
self._callbacks = {}
self.deque = deque()
self._deque_lock = Lock()
sockerr = None
addresses = socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM)
for (af, socktype, proto, canonname, sockaddr) in addresses:
try:
self._socket = socket.socket(af, socktype, proto)
if self.ssl_options:
if not ssl:
raise Exception("This version of Python was not compiled with SSL support")
self._socket = ssl.wrap_socket(self._socket, **self.ssl_options)
self._socket.settimeout(1.0) # TODO potentially make this value configurable
self._socket.connect(sockaddr)
sockerr = None
break
except socket.error as err:
sockerr = err
if sockerr:
raise socket.error(sockerr.errno, "Tried connecting to %s. Last error: %s" % ([a[4] for a in addresses], sockerr.strerror))
self._socket.setblocking(0)
if self.sockopts:
for args in self.sockopts:
self._socket.setsockopt(*args)
with self._libevloop._lock:
self._read_watcher = libev.IO(self._socket.fileno(), libev.EV_READ, self._libevloop._loop, self.handle_read)
self._write_watcher = libev.IO(self._socket.fileno(), libev.EV_WRITE, self._libevloop._loop, self.handle_write)
self._send_options_message()
self._libevloop.connection_created(self)
# start the global event loop if needed
self._libevloop.maybe_start()