How to use transfer method in hypothesis

Best Python code snippet using hypothesis

processpool.py

Source:processpool.py

...249        self._start_if_needed()250        if extra_args is None:251            extra_args = {}252        self._validate_all_known_args(extra_args)253        transfer_id = self._transfer_monitor.notify_new_transfer()254        download_file_request = DownloadFileRequest(255                transfer_id=transfer_id, bucket=bucket, key=key,256                filename=filename, extra_args=extra_args,257                expected_size=expected_size,258            )259        logger.debug(260            'Submitting download file request: %s.', download_file_request)261        self._download_request_queue.put(download_file_request)262        call_args = CallArgs(263            bucket=bucket, key=key, filename=filename, extra_args=extra_args,264            expected_size=expected_size)265        future = self._get_transfer_future(transfer_id, call_args)266        return future267    def shutdown(self):268        """Shutdown the downloader269        It will wait till all downloads are complete before returning.270        """271        self._shutdown_if_needed()272    def __enter__(self):273        return self274    def __exit__(self, exc_type, exc_value, *args):275        if isinstance(exc_value, KeyboardInterrupt):276            if self._transfer_monitor is not None:277                self._transfer_monitor.notify_cancel_all_in_progress()278        self.shutdown()279    def _start_if_needed(self):280        with self._start_lock:281            if not self._started:282                self._start()283    def _start(self):284        self._start_transfer_monitor_manager()285        self._start_submitter()286        self._start_get_object_workers()287        self._started = True288    def _validate_all_known_args(self, provided):289        for kwarg in provided:290            if kwarg not in ALLOWED_DOWNLOAD_ARGS:291                raise ValueError(292                    "Invalid extra_args key '%s', "293                    "must be one of: %s" % (294                        kwarg, ', '.join(ALLOWED_DOWNLOAD_ARGS)))295    def _get_transfer_future(self, transfer_id, call_args):296        meta = ProcessPoolTransferMeta(297            call_args=call_args, transfer_id=transfer_id)298        future = ProcessPoolTransferFuture(299            monitor=self._transfer_monitor, meta=meta)300        return future301    def _start_transfer_monitor_manager(self):302        logger.debug('Starting the TransferMonitorManager.')303        self._manager = TransferMonitorManager()304        # We do not want Ctrl-C's to cause the manager to shutdown immediately305        # as worker processes will still need to communicate with it when they306        # are shutting down. So instead we ignore Ctrl-C and let the manager307        # be explicitly shutdown when shutting down the downloader.308        self._manager.start(_add_ignore_handler_for_interrupts)309        self._transfer_monitor = self._manager.TransferMonitor()310    def _start_submitter(self):311        logger.debug('Starting the GetObjectSubmitter.')312        self._submitter = GetObjectSubmitter(313            transfer_config=self._transfer_config,314            client_factory=self._client_factory,315            transfer_monitor=self._transfer_monitor,316            osutil=self._osutil,317            download_request_queue=self._download_request_queue,318            worker_queue=self._worker_queue319        )320        self._submitter.start()321    def _start_get_object_workers(self):322        logger.debug('Starting %s GetObjectWorkers.',323                     self._transfer_config.max_request_processes)324        for _ in range(self._transfer_config.max_request_processes):325            worker = GetObjectWorker(326                queue=self._worker_queue,327                client_factory=self._client_factory,328                transfer_monitor=self._transfer_monitor,329                osutil=self._osutil,330            )331            worker.start()332            self._workers.append(worker)333    def _shutdown_if_needed(self):334        with self._start_lock:335            if self._started:336                self._shutdown()337    def _shutdown(self):338        self._shutdown_submitter()339        self._shutdown_get_object_workers()340        self._shutdown_transfer_monitor_manager()341        self._started = False342    def _shutdown_transfer_monitor_manager(self):343        logger.debug('Shutting down the TransferMonitorManager.')344        self._manager.shutdown()345    def _shutdown_submitter(self):346        logger.debug('Shutting down the GetObjectSubmitter.')347        self._download_request_queue.put(SHUTDOWN_SIGNAL)348        self._submitter.join()349    def _shutdown_get_object_workers(self):350        logger.debug('Shutting down the GetObjectWorkers.')351        for _ in self._workers:352            self._worker_queue.put(SHUTDOWN_SIGNAL)353        for worker in self._workers:354            worker.join()355class ProcessPoolTransferFuture(BaseTransferFuture):356    def __init__(self, monitor, meta):357        """The future associated to a submitted process pool transfer request358        :type monitor: TransferMonitor359        :param monitor: The monitor associated to the proccess pool downloader360        :type meta: ProcessPoolTransferMeta361        :param meta: The metadata associated to the request. This object362            is visible to the requester.363        """364        self._monitor = monitor365        self._meta = meta366    @property367    def meta(self):368        return self._meta369    def done(self):370        return self._monitor.is_done(self._meta.transfer_id)371    def result(self):372        try:373            return self._monitor.poll_for_result(self._meta.transfer_id)374        except KeyboardInterrupt:375            # For the multiprocessing Manager, a thread is given a single376            # connection to reuse in communicating between the thread in the377            # main process and the Manager's process. If a Ctrl-C happens when378            # polling for the result, it will make the main thread stop trying379            # to receive from the connection, but the Manager process will not380            # know that the main process has stopped trying to receive and381            # will not close the connection. As a result if another message is382            # sent to the Manager process, the listener in the Manager383            # processes will not process the new message as it is still trying384            # trying to process the previous message (that was Ctrl-C'd) and385            # thus cause the thread in the main process to hang on its send.386            # The only way around this is to create a new connection and send387            # messages from that new connection instead.388            self._monitor._connect()389            self.cancel()390            raise391    def cancel(self):392        self._monitor.notify_exception(393            self._meta.transfer_id, CancelledError()394        )395class ProcessPoolTransferMeta(BaseTransferMeta):396    """Holds metadata about the ProcessPoolTransferFuture"""397    def __init__(self, transfer_id, call_args):398        self._transfer_id = transfer_id399        self._call_args = call_args400        self._user_context = {}401    @property402    def call_args(self):403        return self._call_args404    @property405    def transfer_id(self):406        return self._transfer_id407    @property408    def user_context(self):409        return self._user_context410class ClientFactory(object):411    def __init__(self, client_kwargs=None):412        """Creates S3 clients for processes413        Botocore sessions and clients are not pickleable so they cannot be414        inherited across Process boundaries. Instead, they must be instantiated415        once a process is running.416        """417        self._client_kwargs = client_kwargs418        if self._client_kwargs is None:419            self._client_kwargs = {}420        client_config = deepcopy(self._client_kwargs.get('config', Config()))421        if not client_config.user_agent_extra:422            client_config.user_agent_extra = PROCESS_USER_AGENT423        else:424            client_config.user_agent_extra += " " + PROCESS_USER_AGENT425        self._client_kwargs['config'] = client_config426    def create_client(self):427        """Create a botocore S3 client"""428        return botocore.session.Session().create_client(429            's3', **self._client_kwargs)430class TransferMonitor(object):431    def __init__(self):432        """Monitors transfers for cross-proccess communication433        Notifications can be sent to the monitor and information can be434        retrieved from the monitor for a particular transfer. This abstraction435        is ran in a ``multiprocessing.managers.BaseManager`` in order to be436        shared across processes.437        """438        # TODO: Add logic that removes the TransferState if the transfer is439        #  marked as done and the reference to the future is no longer being440        #  held onto. Without this logic, this dictionary will continue to441        #  grow in size with no limit.442        self._transfer_states = {}443        self._id_count = 0444        self._init_lock = threading.Lock()445    def notify_new_transfer(self):446        with self._init_lock:447            transfer_id = self._id_count448            self._transfer_states[transfer_id] = TransferState()449            self._id_count += 1450            return transfer_id451    def is_done(self, transfer_id):452        """Determine a particular transfer is complete453        :param transfer_id: Unique identifier for the transfer454        :return: True, if done. False, otherwise.455        """456        return self._transfer_states[transfer_id].done457    def notify_done(self, transfer_id):458        """Notify a particular transfer is complete459        :param transfer_id: Unique identifier for the transfer...

volume_transfer.py

Source:volume_transfer.py

...24from cinder.i18n import _, _LI25from cinder import transfer as transferAPI26from cinder import utils27LOG = logging.getLogger(__name__)28def make_transfer(elem):29    elem.set('id')30    elem.set('volume_id')31    elem.set('created_at')32    elem.set('name')33    elem.set('auth_key')34class TransferTemplate(xmlutil.TemplateBuilder):35    def construct(self):36        root = xmlutil.TemplateElement('transfer', selector='transfer')37        make_transfer(root)38        alias = Volume_transfer.alias39        namespace = Volume_transfer.namespace40        return xmlutil.MasterTemplate(root, 1, nsmap={alias: namespace})41class TransfersTemplate(xmlutil.TemplateBuilder):42    def construct(self):43        root = xmlutil.TemplateElement('transfers')44        elem = xmlutil.SubTemplateElement(root, 'transfer',45                                          selector='transfers')46        make_transfer(elem)47        alias = Volume_transfer.alias48        namespace = Volume_transfer.namespace49        return xmlutil.MasterTemplate(root, 1, nsmap={alias: namespace})50class CreateDeserializer(wsgi.MetadataXMLDeserializer):51    def default(self, string):52        dom = utils.safe_minidom_parse_string(string)53        transfer = self._extract_transfer(dom)54        return {'body': {'transfer': transfer}}55    def _extract_transfer(self, node):56        transfer = {}57        transfer_node = self.find_first_child_named(node, 'transfer')58        attributes = ['volume_id', 'name']59        for attr in attributes:60            if transfer_node.getAttribute(attr):61                transfer[attr] = transfer_node.getAttribute(attr)62        return transfer63class AcceptDeserializer(wsgi.MetadataXMLDeserializer):64    def default(self, string):65        dom = utils.safe_minidom_parse_string(string)66        transfer = self._extract_transfer(dom)67        return {'body': {'accept': transfer}}68    def _extract_transfer(self, node):69        transfer = {}70        transfer_node = self.find_first_child_named(node, 'accept')71        attributes = ['auth_key']72        for attr in attributes:73            if transfer_node.getAttribute(attr):74                transfer[attr] = transfer_node.getAttribute(attr)75        return transfer76class VolumeTransferController(wsgi.Controller):77    """The Volume Transfer API controller for the OpenStack API."""78    _view_builder_class = transfer_view.ViewBuilder79    def __init__(self):80        self.transfer_api = transferAPI.API()81        super(VolumeTransferController, self).__init__()82    @wsgi.serializers(xml=TransferTemplate)83    def show(self, req, id):84        """Return data about active transfers."""85        context = req.environ['cinder.context']86        try:87            transfer = self.transfer_api.get(context, transfer_id=id)88        except exception.TransferNotFound as error:89            raise exc.HTTPNotFound(explanation=error.msg)90        return self._view_builder.detail(req, transfer)91    @wsgi.serializers(xml=TransfersTemplate)92    def index(self, req):93        """Returns a summary list of transfers."""94        return self._get_transfers(req, is_detail=False)95    @wsgi.serializers(xml=TransfersTemplate)96    def detail(self, req):97        """Returns a detailed list of transfers."""98        return self._get_transfers(req, is_detail=True)99    def _get_transfers(self, req, is_detail):100        """Returns a list of transfers, transformed through view builder."""101        context = req.environ['cinder.context']102        filters = req.params.copy()103        LOG.debug('Listing volume transfers')104        transfers = self.transfer_api.get_all(context, filters=filters)105        transfer_count = len(transfers)106        limited_list = common.limited(transfers, req)107        if is_detail:108            transfers = self._view_builder.detail_list(req, limited_list,109                                                       transfer_count)110        else:111            transfers = self._view_builder.summary_list(req, limited_list,112                                                        transfer_count)113        return transfers114    @wsgi.response(202)115    @wsgi.serializers(xml=TransferTemplate)116    @wsgi.deserializers(xml=CreateDeserializer)117    def create(self, req, body):118        """Create a new volume transfer."""119        LOG.debug('Creating new volume transfer %s', body)120        if not self.is_valid_body(body, 'transfer'):121            raise exc.HTTPBadRequest()122        context = req.environ['cinder.context']123        try:124            transfer = body['transfer']125            volume_id = transfer['volume_id']126        except KeyError:127            msg = _("Incorrect request body format")128            raise exc.HTTPBadRequest(explanation=msg)129        name = transfer.get('name', None)130        LOG.info(_LI("Creating transfer of volume %s"),131                 volume_id,132                 context=context)133        try:134            new_transfer = self.transfer_api.create(context, volume_id, name)135        except exception.InvalidVolume as error:136            raise exc.HTTPBadRequest(explanation=error.msg)137        except exception.VolumeNotFound as error:138            raise exc.HTTPNotFound(explanation=error.msg)139        transfer = self._view_builder.create(req,140                                             dict(new_transfer.iteritems()))141        return transfer142    @wsgi.response(202)143    @wsgi.serializers(xml=TransferTemplate)144    @wsgi.deserializers(xml=AcceptDeserializer)145    def accept(self, req, id, body):146        """Accept a new volume transfer."""147        transfer_id = id148        LOG.debug('Accepting volume transfer %s', transfer_id)149        if not self.is_valid_body(body, 'accept'):150            raise exc.HTTPBadRequest()151        context = req.environ['cinder.context']152        try:153            accept = body['accept']154            auth_key = accept['auth_key']155        except KeyError:156            msg = _("Incorrect request body format")157            raise exc.HTTPBadRequest(explanation=msg)158        LOG.info(_LI("Accepting transfer %s"), transfer_id,159                 context=context)160        try:161            accepted_transfer = self.transfer_api.accept(context, transfer_id,162                                                         auth_key)163        except exception.VolumeSizeExceedsAvailableQuota as error:164            raise exc.HTTPRequestEntityTooLarge(165                explanation=error.msg, headers={'Retry-After': 0})166        except exception.InvalidVolume as error:167            raise exc.HTTPBadRequest(explanation=error.msg)168        transfer = \169            self._view_builder.summary(req,170                                       dict(accepted_transfer.iteritems()))171        return transfer172    def delete(self, req, id):173        """Delete a transfer."""174        context = req.environ['cinder.context']175        LOG.info(_LI("Delete transfer with id: %s"), id, context=context)176        try:177            self.transfer_api.delete(context, transfer_id=id)178        except exception.TransferNotFound as error:179            raise exc.HTTPNotFound(explanation=error.msg)180        return webob.Response(status_int=202)181class Volume_transfer(extensions.ExtensionDescriptor):182    """Volume transfer management support."""183    name = "VolumeTransfer"184    alias = "os-volume-transfer"185    namespace = "http://docs.openstack.org/volume/ext/volume-transfer/" + \186                "api/v1.1"187    updated = "2013-05-29T00:00:00+00:00"188    def get_resources(self):189        resources = []190        res = extensions.ResourceExtension(Volume_transfer.alias,191                                           VolumeTransferController(),192                                           collection_actions={'detail':193                                                               'GET'},194                                           member_actions={'accept': 'POST'})195        resources.append(res)...

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