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How to use host_remove_labels method in autotest

Best Python code snippet using autotest_python

afe_store.py

Source:afe_store.py

1# Copyright 2017 The Chromium OS Authors. All rights reserved.2# Use of this source code is governed by a BSD-style license that can be3# found in the LICENSE file.4import logging5import common6from autotest_lib.frontend.afe.json_rpc import proxy as rpc_proxy7from autotest_lib.server.hosts import host_info8from autotest_lib.server.cros.dynamic_suite import frontend_wrappers9class AfeStore(host_info.CachingHostInfoStore):10    """Directly interact with the (given) AFE for host information."""11    _RETRYING_AFE_TIMEOUT_MIN = 512    _RETRYING_AFE_RETRY_DELAY_SEC = 1013    def __init__(self, hostname, afe=None):14        """15        @param hostname: The name of the host for which we want to track host16                information.17        @param afe: A frontend.AFE object to make RPC calls. Will create one18                internally if None.19        """20        super(AfeStore, self).__init__()21        self._hostname = hostname22        self._afe = afe23        if self._afe is None:24            self._afe = frontend_wrappers.RetryingAFE(25                    timeout_min=self._RETRYING_AFE_TIMEOUT_MIN,26                    delay_sec=self._RETRYING_AFE_RETRY_DELAY_SEC)27    def _refresh_impl(self):28        """Obtains HostInfo directly from the AFE."""29        try:30            hosts = self._afe.get_hosts(hostname=self._hostname)31        except rpc_proxy.JSONRPCException as e:32            raise host_info.StoreError(e)33        if not hosts:34            raise host_info.StoreError('No hosts founds with hostname: %s' %35                                       self._hostname)36        if len(hosts) > 1:37            logging.warning(38                    'Found %d hosts with the name %s. Picking the first one.',39                    len(hosts), self._hostname)40        host = hosts[0]41        return host_info.HostInfo(host.labels, host.attributes)42    def _commit_impl(self, new_info):43        """Commits HostInfo back to the AFE.44        @param new_info: The new HostInfo to commit.45        """46        # TODO(pprabhu) crbug.com/68032247        # This method has a potentially malignent race condition. We obtain a48        # copy of HostInfo from the AFE and then add/remove labels / attribtes49        # based on that. If another user tries to commit it's changes in50        # parallel, we'll end up with corrupted labels / attributes.51        old_info = self._refresh_impl()52        self._remove_labels_on_afe(set(old_info.labels) - set(new_info.labels))53        self._add_labels_on_afe(set(new_info.labels) - set(old_info.labels))54        # TODO(pprabhu) Also commit attributes when we first replace a direct55        # AFE call for attribute update.56        if old_info.attributes != new_info.attributes:57            logging.warning(58                    'Updating attributes is currently not supported. '59                    'attributes update skipped. old attributes: %s, committed '60                    'attributes: %s',61                    old_info.attributes, new_info.attributes)62    def _remove_labels_on_afe(self, labels):63        """Requests the AFE to remove the given labels.64        @param labels: Remove these.65        """66        if not labels:67            return68        logging.debug('removing labels: %s', labels)69        try:70            self._afe.run('host_remove_labels', id=self._hostname,71                          labels=labels)72        except rpc_proxy.JSONRPCException as e:73            raise host_info.StoreError(e)74    def _add_labels_on_afe(self, labels):75        """Requests the AFE to add the given labels.76        @param labels: Add these.77        """78        if not labels:79            return80        logging.info('adding labels: %s', labels)81        try:82            self._afe.run('host_add_labels', id=self._hostname, labels=labels)83        except rpc_proxy.JSONRPCException as e:...

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