How to use the ovs.vlog function in ovs

import ovs.db.idl
import ovs.db.schema
import ovs.db.types
import ovs.ovsuuid
import ovs.poller
import ovs.stream
import ovs.util
import ovs.vlog
from ovs.db import data
from ovs.db import error
from ovs.fatal_signal import signal_alarm

import six

vlog = ovs.vlog.Vlog("test-ovsdb")
vlog.set_levels_from_string("console:dbg")
vlog.init(None)


def unbox_json(json):
    if type(json) == list and len(json) == 1:
        return json[0]
    else:
        return json


def do_default_atoms():
    for type_ in ovs.db.types.ATOMIC_TYPES:
        if type_ == ovs.db.types.VoidType:
            continue

def __init__(self, ip, protocol='tcp', port='6640', timeout=10):
        super(OvsApi, self).__init__()
        self.ip = ip
        self.protocol = protocol
        self.port = port
        # NOTE: This has to be this name vsctl_timeout, as neutron will use
        # this attribute to set the timeout of ovs db.
        self.vsctl_timeout = timeout
        self.ovsdb = None
        self.integration_bridge = cfg.CONF.df.integration_bridge
        if cfg.CONF.log_dir:
            vlog.Vlog.init(cfg.CONF.log_dir + '/' + OVS_LOG_FILE_NAME)
        else:
            vlog.Vlog.init()

# 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 uuid

import ovs.jsonrpc
import ovs.db.parser
import ovs.db.schema
from ovs.db import error
import ovs.ovsuuid
import ovs.poller
import ovs.vlog

vlog = ovs.vlog.Vlog("idl")

__pychecker__ = 'no-classattr no-objattrs'


class Idl:
    """Open vSwitch Database Interface Definition Language (OVSDB IDL).

    The OVSDB IDL maintains an in-memory replica of a database.  It issues RPC
    requests to an OVSDB database server and parses the responses, converting
    raw JSON into data structures that are easier for clients to digest.

    The IDL also assists with issuing database transactions.  The client
    creates a transaction, manipulates the IDL data structures, and commits or
    aborts the transaction.  The IDL then composes and issues the necessary
    JSON-RPC requests and reports to the client whether the transaction
    completed successfully.

import six

try:
    from OpenSSL import SSL
except ImportError:
    SSL = None

if sys.platform == 'win32':
    import ovs.winutils as winutils
    import pywintypes
    import win32event
    import win32file
    import win32pipe

vlog = ovs.vlog.Vlog("stream")


def stream_or_pstream_needs_probes(name):
    """ True if the stream or pstream specified by 'name' needs periodic probes
    to verify connectivity.  For [p]streams which need probes, it can take a
    long time to notice the connection was dropped.  Returns False if probes
    aren't needed, and None if 'name' is invalid"""

    cls = Stream._find_method(name)
    if cls:
        return cls.needs_probes()
    elif PassiveStream.is_valid_name(name):
        return PassiveStream.needs_probes(name)
    else:
        return None

# 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 ovs.vlog
import ovs.util

# Values returned by Reconnect.run()
CONNECT = 'connect'
DISCONNECT = 'disconnect'
PROBE = 'probe'

EOF = ovs.util.EOF
vlog = ovs.vlog.Vlog("reconnect")


class Reconnect(object):
    """A finite-state machine for connecting and reconnecting to a network
    resource with exponential backoff.  It also provides optional support for
    detecting a connection on which the peer is no longer responding.

    The library does not implement anything networking related, only an FSM for
    networking code to use.

    Many Reconnect methods take a "now" argument.  This makes testing easier
    since there is no hidden state.  When not testing, just pass the return
    value of ovs.time.msec().  (Perhaps this design should be revisited
    later.)"""

    class Void(object):

# 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 errno
import os
import select
import socket
import sys

import ovs.fatal_signal
import ovs.poller
import ovs.vlog

vlog = ovs.vlog.Vlog("socket_util")


def make_unix_socket(style, nonblock, bind_path, connect_path):
    """Creates a Unix domain socket in the given 'style' (either
    socket.SOCK_DGRAM or socket.SOCK_STREAM) that is bound to 'bind_path' (if
    'bind_path' is not None) and connected to 'connect_path' (if 'connect_path'
    is not None).  If 'nonblock' is true, the socket is made non-blocking.

    Returns (error, socket): on success 'error' is 0 and 'socket' is a new
    socket object, on failure 'error' is a positive errno value and 'socket' is
    None."""

    try:
        sock = socket.socket(socket.AF_UNIX, style)
    except socket.error as e:
        return get_exception_errno(e), None

def _using_eventlet_green_select():
        return eventlet_patcher.is_monkey_patched(select)
except:
    eventlet_patcher = None

    def _using_eventlet_green_select():
        return False

try:
    from gevent import monkey as gevent_monkey
except:
    gevent_monkey = None


vlog = ovs.vlog.Vlog("poller")

POLLIN = 0x001
POLLOUT = 0x004
POLLERR = 0x008
POLLHUP = 0x010
POLLNVAL = 0x020


# eventlet/gevent doesn't support select.poll. If select.poll is used,
# python interpreter is blocked as a whole instead of switching from the
# current thread that is about to block to other runnable thread.
# So emulate select.poll by select.select because using python means that
# performance isn't so important.
class _SelectSelect(object):
    """ select.poll emulation by using select.select.
    Only register and poll are needed at the moment.

# See the License for the specific language governing permissions and
# limitations under the License.

import errno
import os

import ovs.json
import ovs.poller
import ovs.reconnect
import ovs.stream
import ovs.timeval
import ovs.util
import ovs.vlog

EOF = ovs.util.EOF
vlog = ovs.vlog.Vlog("jsonrpc")


class Message(object):
    T_REQUEST = 0               # Request.
    T_NOTIFY = 1                # Notification.
    T_REPLY = 2                 # Successful reply.
    T_ERROR = 3                 # Error reply.

    __types = {T_REQUEST: "request",
               T_NOTIFY: "notification",
               T_REPLY: "reply",
               T_ERROR: "error"}

    def __init__(self, type_, method, params, result, error, id):
        self.type = type_
        self.method = method

import os
import sys

import ovs.dirs
import ovs.jsonrpc
import ovs.stream
import ovs.unixctl
import ovs.util
import ovs.version
import ovs.vlog

import six
from six.moves import range

Message = ovs.jsonrpc.Message
vlog = ovs.vlog.Vlog("unixctl_server")
strtypes = six.string_types


class UnixctlConnection(object):
    def __init__(self, rpc):
        assert isinstance(rpc, ovs.jsonrpc.Connection)
        self._rpc = rpc
        self._request_id = None

    def run(self):
        self._rpc.run()
        error = self._rpc.get_status()
        if error or self._rpc.get_backlog():
            return error

        for _ in range(10):

import os
import random
import sys

import ovs.json
import ovs.poller
import ovs.reconnect
import ovs.stream
import ovs.timeval
import ovs.util
import ovs.vlog

import six

EOF = ovs.util.EOF
vlog = ovs.vlog.Vlog("jsonrpc")


class Message(object):
    T_REQUEST = 0               # Request.
    T_NOTIFY = 1                # Notification.
    T_REPLY = 2                 # Successful reply.
    T_ERROR = 3                 # Error reply.

    __types = {T_REQUEST: "request",
               T_NOTIFY: "notification",
               T_REPLY: "reply",
               T_ERROR: "error"}

    def __init__(self, type_, method, params, result, error, id):
        self.type = type_
        self.method = method