Python decorators.retry_on_exception方法代碼示例

# 需要導入模塊: from charmhelpers.core import decorators [as 別名]
# 或者: from charmhelpers.core.decorators import retry_on_exception [as 別名]
def add_node(self, host, executors, labels=()):
        """Add a slave node with the given host name."""
        self.wait()

        client = self._make_client()

        @retry_on_exception(3, 3, exc_type=RETRIABLE)
        def _add_node():
            if client.node_exists(host):
                hookenv.log("Node exists - not adding")
                return

            hookenv.log("Adding node '%s' to Jenkins master" % host)

            # See the "Launch slave agent headlessly" section of the Jenkins
            # wiki page about distributed builds:
            #
            # https://wiki.jenkins-ci.org/display/JENKINS/Distributed+builds
            launcher = jenkins.LAUNCHER_JNLP

            client.create_node(
                host, int(executors), host, labels=labels, launcher=launcher)

            if not client.node_exists(host):
                hookenv.log(
                    "Failed to create node '%s'" % host, level=ERROR)

        return _add_node() 

# 需要導入模塊: from charmhelpers.core import decorators [as 別名]
# 或者: from charmhelpers.core.decorators import retry_on_exception [as 別名]
def charm_check_func():
    """Custom function to assess the status of the current unit

    @returns (status, message) - tuple of strings if an issue
    """

    @retry_on_exception(num_retries=10,
                        base_delay=2,
                        exc_type=DesyncedException)
    def _cluster_in_sync():
        '''Helper func to wait for a while for resync to occur

        @raise DesynedException: raised if local unit is not in sync
                                 with its peers
        '''
        if not cluster_in_sync():
            raise DesyncedException()

    min_size = config('min-cluster-size')
    # Ensure that number of peers > cluster size configuration
    if not is_sufficient_peers():
        return ('blocked', 'Insufficient peers to bootstrap cluster')

    if min_size and int(min_size) > 1:
        # Once running, ensure that cluster is in sync
        # and has the required peers
        if not is_bootstrapped():
            return ('waiting', 'Unit waiting for cluster bootstrap')
        elif is_bootstrapped():
            try:
                _cluster_in_sync()
                return ('active', 'Unit is ready and clustered')
            except DesyncedException:
                return ('blocked', 'Unit is not in sync')
    else:
        return ('active', 'Unit is ready') 

# 需要導入模塊: from charmhelpers.core import decorators [as 別名]
# 或者: from charmhelpers.core.decorators import retry_on_exception [as 別名]
def ensure_api_responding(cls):
        """Check that the api service is responding.

        The retry_on_exception decorator will cause this method to be called
        until it succeeds or retry limit is exceeded"""
        hookenv.log('Checking API service is responding',
                    level=hookenv.WARNING)
        check_cmd = ['reactive/designate_utils.py', 'server-list']
        subprocess.check_call(check_cmd) 

# 需要導入模塊: from charmhelpers.core import decorators [as 別名]
# 或者: from charmhelpers.core.decorators import retry_on_exception [as 別名]
def get_keystone_manager(endpoint, token, api_version=None):
    """Return a keystonemanager for the correct API version

    If api_version has not been set then create a manager based on the endpoint
    Use this manager to query the catalogue and determine which api version
    should actually be being used. Return the correct client based on that.
    Function is wrapped in a retry_on_exception to catch the case where the
    keystone service is still initialising and not responding to requests yet.
    XXX I think the keystone client should be able to do version
        detection automatically so the code below could be greatly
        simplified

    @param endpoint: the keystone endpoint to point client at
    @param token: the keystone admin_token
    @param api_version: version of the keystone api the client should use
    @returns keystonemanager class used for interrogating keystone
    """
    if api_version:
        return _get_keystone_manager_class(endpoint, token, api_version)
    else:
        if 'v2.0' in endpoint.split('/'):
            manager = _get_keystone_manager_class(endpoint, token, 2)
        else:
            manager = _get_keystone_manager_class(endpoint, token, 3)
        if endpoint.endswith('/'):
            base_ep = endpoint.rsplit('/', 2)[0]
        else:
            base_ep = endpoint.rsplit('/', 1)[0]
        svc_id = None
        for svc in manager.api.services.list():
            if svc.type == 'identity':
                svc_id = svc.id
        version = None
        for ep in manager.api.endpoints.list():
            if ep.service_id == svc_id and hasattr(ep, 'adminurl'):
                version = ep.adminurl.split('/')[-1]
        if version and version == 'v2.0':
            new_ep = base_ep + "/" + 'v2.0'
            return _get_keystone_manager_class(new_ep, token, 2)
        elif version and version == 'v3':
            new_ep = base_ep + "/" + 'v3'
            return _get_keystone_manager_class(new_ep, token, 3)
        else:
            return manager