Python gettextutils._函数代码示例

 def delete(self):
     if self.is_building:
         raise exception.UnprocessableEntity("Instance %s is not ready." % self.id)
     LOG.debug(_("  ... deleting compute id = %s") % self.db_info.compute_instance_id)
     LOG.debug(_(" ... setting status to DELETING."))
     self.update_db(task_status=InstanceTasks.DELETING)
     task_api.API(self.context).delete_instance(self.id)

def is_enabled():
    cert_file = CONF.ssl.cert_file
    key_file = CONF.ssl.key_file
    ca_file = CONF.ssl.ca_file
    use_ssl = cert_file or key_file

    if cert_file and not os.path.exists(cert_file):
        raise RuntimeError(_("Unable to find cert_file : %s") % cert_file)

    if ca_file and not os.path.exists(ca_file):
        raise RuntimeError(_("Unable to find ca_file : %s") % ca_file)

    if key_file and not os.path.exists(key_file):
        raise RuntimeError(_("Unable to find key_file : %s") % key_file)

    if use_ssl and (not cert_file or not key_file):
        raise RuntimeError(
            _(
                "When running server in SSL mode, you must "
                "specify both a cert_file and key_file "
                "option value in your configuration file"
            )
        )

    return use_ssl

    def _load_servers_status(load_instance, context, db_items, find_server):
        ret = []
        for db in db_items:
            server = None
            try:
                #TODO(tim.simpson): Delete when we get notifications working!
                if InstanceTasks.BUILDING == db.task_status:
                    db.server_status = "BUILD"
                else:
                    try:
                        server = find_server(db.id, db.compute_instance_id)
                        db.server_status = server.status
                    except exception.ComputeInstanceNotFound:
                        db.server_status = "SHUTDOWN"  # Fake it...
                #TODO(tim.simpson): End of hack.

                #volumes = find_volumes(server.id)
                status = InstanceServiceStatus.find_by(instance_id=db.id)
                LOG.info(_("Server api_status(%s)") %
                         (status.status.api_status))
                if not status.status:  # This should never happen.
                    LOG.error(_("Server status could not be read for "
                                "instance id(%s)") % (db.id))
                    continue
            except exception.ModelNotFoundError:
                LOG.error(_("Server status could not be read for "
                            "instance id(%s)") % (db.id))
                continue
            ret.append(load_instance(context, db, status))
        return ret

 def index(self, req, tenant_id, detailed=False):
     """Return all hosts."""
     LOG.info(_("req : '%s'\n\n") % req)
     LOG.info(_("Indexing a host for tenant '%s'") % tenant_id)
     context = req.environ[wsgi.CONTEXT_KEY]
     hosts = models.SimpleHost.load_all(context)
     return wsgi.Result(views.HostsView(hosts).data(), 200)

    def action(self, req, body, tenant_id, id):
        LOG.info("req : '%s'\n\n" % req)
        LOG.info("Comitting an ACTION again instance %s for tenant '%s'"
                 % (id, tenant_id))
        if not body:
            raise exception.BadRequest(_("Invalid request body."))
        context = req.environ[wsgi.CONTEXT_KEY]
        instance = models.Instance.load(context, id)
        _actions = {
            'restart': self._action_restart,
            'resize': self._action_resize,
            'reset_password': self._action_reset_password
        }
        selected_action = None
        for key in body:
            if key in _actions:
                if selected_action is not None:
                    msg = _("Only one action can be specified per request.")
                    raise exception.BadRequest(msg)
                selected_action = _actions[key]
            else:
                msg = _("Invalid instance action: %s") % key
                raise exception.BadRequest(msg)

        if selected_action:
            return selected_action(instance, body)
        else:
            raise exception.BadRequest(_("Invalid request body."))

        def inner(*args, **kwargs):
            # NOTE(soren): If we ever go natively threaded, this will be racy.
            #              See http://stackoverflow.com/questions/5390569/dyn
            #              amically-allocating-and-destroying-mutexes
            sem = _semaphores.get(name, semaphore.Semaphore())
            if name not in _semaphores:
                # this check is not racy - we're already holding ref locally
                # so GC won't remove the item and there was no IO switch
                # (only valid in greenthreads)
                _semaphores[name] = sem

            with sem:
                LOG.debug(_('Got semaphore "%(lock)s" for method '
                            '"%(method)s"...'), {'lock': name,
                                                 'method': f.__name__})
                if external and not CONF.disable_process_locking:
                    LOG.debug(_('Attempting to grab file lock "%(lock)s" for '
                                'method "%(method)s"...'),
                              {'lock': name, 'method': f.__name__})
                    cleanup_dir = False

                    # We need a copy of lock_path because it is non-local
                    local_lock_path = lock_path
                    if not local_lock_path:
                        local_lock_path = CONF.lock_path

                    if not local_lock_path:
                        cleanup_dir = True
                        local_lock_path = tempfile.mkdtemp()

                    if not os.path.exists(local_lock_path):
                        cleanup_dir = True
                        fileutils.ensure_tree(local_lock_path)

                    # NOTE(mikal): the lock name cannot contain directory
                    # separators
                    safe_name = name.replace(os.sep, '_')
                    lock_file_name = '%s%s' % (lock_file_prefix, safe_name)
                    lock_file_path = os.path.join(local_lock_path,
                                                  lock_file_name)

                    try:
                        lock = InterProcessLock(lock_file_path)
                        with lock:
                            LOG.debug(_('Got file lock "%(lock)s" at %(path)s '
                                        'for method "%(method)s"...'),
                                      {'lock': name,
                                       'path': lock_file_path,
                                       'method': f.__name__})
                            retval = f(*args, **kwargs)
                    finally:
                        # NOTE(vish): This removes the tempdir if we needed
                        #             to create one. This is used to cleanup
                        #             the locks left behind by unit tests.
                        if cleanup_dir:
                            shutil.rmtree(local_lock_path)
                else:
                    retval = f(*args, **kwargs)

            return retval

    def _wait_child(self):
        try:
            # Don't block if no child processes have exited
            pid, status = os.waitpid(0, os.WNOHANG)
            if not pid:
                return None
        except OSError as exc:
            if exc.errno not in (errno.EINTR, errno.ECHILD):
                raise
            return None

        if os.WIFSIGNALED(status):
            sig = os.WTERMSIG(status)
            LOG.info(_('Child %(pid)d killed by signal %(sig)d'),
                     dict(pid=pid, sig=sig))
        else:
            code = os.WEXITSTATUS(status)
            LOG.info(_('Child %(pid)s exited with status %(code)d'),
                     dict(pid=pid, code=code))

        if pid not in self.children:
            LOG.warning(_('pid %d not in child list'), pid)
            return None

        wrap = self.children.pop(pid)
        wrap.children.remove(pid)
        return wrap

    def create_consumer(self, topic, proxy, fanout=False):
        # Register with matchmaker.
        _get_matchmaker().register(topic, CONF.rpc_zmq_host)

        # Subscription scenarios
        if fanout:
            sock_type = zmq.SUB
            subscribe = ('', fanout)[type(fanout) == str]
            topic = 'fanout~' + topic.split('.', 1)[0]
        else:
            sock_type = zmq.PULL
            subscribe = None
            topic = '.'.join((topic.split('.', 1)[0], CONF.rpc_zmq_host))

        if topic in self.topics:
            LOG.info(_("Skipping topic registration. Already registered."))
            return

        # Receive messages from (local) proxy
        inaddr = "ipc://%s/zmq_topic_%s" % \
            (CONF.rpc_zmq_ipc_dir, topic)

        LOG.debug(_("Consumer is a zmq.%s"),
                  ['PULL', 'SUB'][sock_type == zmq.SUB])

        self.reactor.register(proxy, inaddr, sock_type,
                              subscribe=subscribe, in_bind=False)
        self.topics.append(topic)

    def __init__(self, addr, zmq_type, bind=True, subscribe=None):
        self.sock = ZMQ_CTX.socket(zmq_type)
        self.addr = addr
        self.type = zmq_type
        self.subscriptions = []

        # Support failures on sending/receiving on wrong socket type.
        self.can_recv = zmq_type in (zmq.PULL, zmq.SUB)
        self.can_send = zmq_type in (zmq.PUSH, zmq.PUB)
        self.can_sub = zmq_type in (zmq.SUB, )

        # Support list, str, & None for subscribe arg (cast to list)
        do_sub = {
            list: subscribe,
            str: [subscribe],
            type(None): []
        }[type(subscribe)]

        for f in do_sub:
            self.subscribe(f)

        str_data = {'addr': addr, 'type': self.socket_s(),
                    'subscribe': subscribe, 'bind': bind}

        LOG.debug(_("Connecting to %(addr)s with %(type)s"), str_data)
        LOG.debug(_("-> Subscribed to %(subscribe)s"), str_data)
        LOG.debug(_("-> bind: %(bind)s"), str_data)

        try:
            if bind:
                self.sock.bind(addr)
            else:
                self.sock.connect(addr)
        except Exception:
            raise RPCException(_("Could not open socket."))

    def consume_in_thread(self):
        """Runs the ZmqProxy service"""
        ipc_dir = CONF.rpc_zmq_ipc_dir
        consume_in = "tcp://%s:%s" % \
            (CONF.rpc_zmq_bind_address,
             CONF.rpc_zmq_port)
        consumption_proxy = InternalContext(None)

        if not os.path.isdir(ipc_dir):
            try:
                utils.execute('mkdir', '-p', ipc_dir, run_as_root=True)
                utils.execute('chown', "%s:%s" % (os.getuid(), os.getgid()),
                              ipc_dir, run_as_root=True)
                utils.execute('chmod', '750', ipc_dir, run_as_root=True)
            except utils.ProcessExecutionError:
                with excutils.save_and_reraise_exception():
                    LOG.error(_("Could not create IPC directory %s") %
                              (ipc_dir, ))

        try:
            self.register(consumption_proxy,
                          consume_in,
                          zmq.PULL,
                          out_bind=True)
        except zmq.ZMQError:
            with excutils.save_and_reraise_exception():
                LOG.error(_("Could not create ZeroMQ receiver daemon. "
                            "Socket may already be in use."))

        super(ZmqProxy, self).consume_in_thread()

    def consume(self, sock):
        #TODO(ewindisch): use zero-copy (i.e. references, not copying)
        data = sock.recv()
        LOG.debug(_("CONSUMER RECEIVED DATA: %s"), data)
        if sock in self.mapping:
            LOG.debug(_("ROUTER RELAY-OUT %(data)s") % {
                'data': data})
            self.mapping[sock].send(data)
            return

        proxy = self.proxies[sock]

        if data[2] == 'cast':  # Legacy protocol
            packenv = data[3]

            ctx, msg = _deserialize(packenv)
            request = rpc_common.deserialize_msg(msg)
            ctx = RpcContext.unmarshal(ctx)
        elif data[2] == 'impl_zmq_v2':
            packenv = data[4:]

            msg = unflatten_envelope(packenv)
            request = rpc_common.deserialize_msg(msg)

            # Unmarshal only after verifying the message.
            ctx = RpcContext.unmarshal(data[3])
        else:
            LOG.error(_("ZMQ Envelope version unsupported or unknown."))
            return

        self.pool.spawn_n(self.process, proxy, ctx, request)

            def publisher(waiter):
                LOG.info(_("Creating proxy for topic: %s"), topic)

                try:
                    # The topic is received over the network,
                    # don't trust this input.
                    if self.badchars.search(topic) is not None:
                        emsg = _("Topic contained dangerous characters.")
                        LOG.warn(emsg)
                        raise RPCException(emsg)

                    out_sock = ZmqSocket("ipc://%s/zmq_topic_%s" %
                                         (ipc_dir, topic),
                                         sock_type, bind=True)
                except RPCException:
                    waiter.send_exception(*sys.exc_info())
                    return

                self.topic_proxy[topic] = eventlet.queue.LightQueue(
                    CONF.rpc_zmq_topic_backlog)
                self.sockets.append(out_sock)

                # It takes some time for a pub socket to open,
                # before we can have any faith in doing a send() to it.
                if sock_type == zmq.PUB:
                    eventlet.sleep(.5)

                waiter.send(True)

                while(True):
                    data = self.topic_proxy[topic].get()
                    out_sock.send(data)
                    LOG.debug(_("ROUTER RELAY-OUT SUCCEEDED %(data)s") %
                              {'data': data})

 def _error_callback(exc):
     if isinstance(exc, socket.timeout):
         LOG.exception(_("Timed out waiting for RPC response: %s") % str(exc))
         raise rpc_common.Timeout()
     else:
         LOG.exception(_("Failed to consume message from queue: %s") % str(exc))
         info["do_consume"] = True

 def _connect(self, params):
     """Connect to rabbit.  Re-establish any queues that may have
     been declared before if we are reconnecting.  Exceptions should
     be handled by the caller.
     """
     if self.connection:
         LOG.info(_("Reconnecting to AMQP server on " "%(hostname)s:%(port)d") % params)
         try:
             self.connection.close()
         except self.connection_errors:
             pass
         # Setting this in case the next statement fails, though
         # it shouldn't be doing any network operations, yet.
         self.connection = None
     self.connection = kombu.connection.BrokerConnection(**params)
     self.connection_errors = self.connection.connection_errors
     if self.memory_transport:
         # Kludge to speed up tests.
         self.connection.transport.polling_interval = 0.0
     self.consumer_num = itertools.count(1)
     self.connection.connect()
     self.channel = self.connection.channel()
     # work around 'memory' transport bug in 1.1.3
     if self.memory_transport:
         self.channel._new_queue("ae.undeliver")
     for consumer in self.consumers:
         consumer.reconnect(self.channel)
     LOG.info(_("Connected to AMQP server on %(hostname)s:%(port)d") % params)

    def _process_data(self, ctxt, version, method, namespace, args):
        """Process a message in a new thread.

        If the proxy object we have has a dispatch method
        (see rpc.dispatcher.RpcDispatcher), pass it the version,
        method, and args and let it dispatch as appropriate.  If not, use
        the old behavior of magically calling the specified method on the
        proxy we have here.
        """
        ctxt.update_store()
        try:
            rval = self.proxy.dispatch(ctxt, version, method, namespace,
                                       **args)
            # Check if the result was a generator
            if inspect.isgenerator(rval):
                for x in rval:
                    ctxt.reply(x, None, connection_pool=self.connection_pool)
            else:
                ctxt.reply(rval, None, connection_pool=self.connection_pool)
            # This final None tells multicall that it is done.
            ctxt.reply(ending=True, connection_pool=self.connection_pool)
        except rpc_common.ClientException as e:
            LOG.debug(_('Expected exception during message handling (%s)') %
                      e._exc_info[1])
            ctxt.reply(None, e._exc_info,
                       connection_pool=self.connection_pool,
                       log_failure=False)
        except Exception:
            # sys.exc_info() is deleted by LOG.exception().
            exc_info = sys.exc_info()
            LOG.error(_('Exception during message handling'),
                      exc_info=exc_info)
            ctxt.reply(None, exc_info, connection_pool=self.connection_pool)