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#
# Copyright 2018 the original author or authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# 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.
#
"""
Resource Manager will be unique for each OLT device.
It exposes APIs to create/free alloc_ids/onu_ids/gemport_ids. Resource Manager
uses a KV store in backend to ensure resiliency of the data.
"""
import json
import structlog
from bitstring import BitArray
from ast import literal_eval
import shlex
from argparse import ArgumentParser, ArgumentError
from common.pon_resource_manager.resource_kv_store import ResourceKvStore
# Used to parse extra arguments to OpenOlt adapter from the NBI
class OltVendorArgumentParser(ArgumentParser):
# Must override the exit command to prevent it from
# calling sys.exit(). Return exception instead.
def exit(self, status=0, message=None):
raise Exception(message)
class PONResourceManager(object):
"""Implements APIs to initialize/allocate/release alloc/gemport/onu IDs."""
# Constants to identify resource pool
ONU_ID = 'ONU_ID'
ALLOC_ID = 'ALLOC_ID'
GEMPORT_ID = 'GEMPORT_ID'
# Constants for passing command line arugments
OLT_MODEL_ARG = '--olt_model'
# The resource ranges for a given device model should be placed
# at 'resource_manager/<technology>/resource_ranges/<olt_model_type>'
# path on the KV store.
# If Resource Range parameters are to be read from the external KV store,
# they are expected to be stored in the following format.
# Note: All parameters are MANDATORY for now.
'''
{
"onu_id_start": 1,
"onu_id_end": 127,
"alloc_id_start": 1024,
"alloc_id_end": 2816,
"gemport_id_start": 1024,
"gemport_id_end": 8960,
"pon_ports": 16
}
'''
# constants used as keys to reference the resource range parameters from
# and external KV store.
ONU_ID_START_IDX = "onu_id_start"
ONU_ID_END_IDX = "onu_id_end"
ONU_ID_SHARED_IDX = "onu_id_shared"
ALLOC_ID_START_IDX = "alloc_id_start"
ALLOC_ID_END_IDX = "alloc_id_end"
ALLOC_ID_SHARED_IDX = "alloc_id_shared"
GEMPORT_ID_START_IDX = "gemport_id_start"
GEMPORT_ID_END_IDX = "gemport_id_end"
GEMPORT_ID_SHARED_IDX = "gemport_id_shared"
NUM_OF_PON_PORT = "pon_ports"
# PON Resource range configuration on the KV store.
# Format: 'resource_manager/<technology>/resource_ranges/<olt_model_type>'
# The KV store backend is initialized with a path prefix and we need to
# provide only the suffix.
PON_RESOURCE_RANGE_CONFIG_PATH = 'resource_ranges/{}'
# resource path suffix
ALLOC_ID_POOL_PATH = '{}/alloc_id_pool/{}'
GEMPORT_ID_POOL_PATH = '{}/gemport_id_pool/{}'
ONU_ID_POOL_PATH = '{}/onu_id_pool/{}'
# Path on the KV store for storing list of alloc IDs for a given ONU
# Format: <device_id>/<(pon_intf_id, onu_id)>/alloc_ids
ALLOC_ID_RESOURCE_MAP_PATH = '{}/{}/alloc_ids'
# Path on the KV store for storing list of gemport IDs for a given ONU
# Format: <device_id>/<(pon_intf_id, onu_id)>/gemport_ids
GEMPORT_ID_RESOURCE_MAP_PATH = '{}/{}/gemport_ids'
# Constants for internal usage.
PON_INTF_ID = 'pon_intf_id'
START_IDX = 'start_idx'
END_IDX = 'end_idx'
POOL = 'pool'
def __init__(self, technology, extra_args, device_id,
backend, host, port):
"""
Create PONResourceManager object.
:param technology: PON technology
:param: extra_args: This string contains extra arguments passed during
pre-provisioning of OLT and specifies the OLT Vendor type
:param device_id: OLT device id
:param backend: backend store
:param host: ip of backend store
:param port: port on which backend store listens
:raises exception when invalid backend store passed as an argument
"""
# logger
self._log = structlog.get_logger()
try:
self.technology = technology
self.extra_args = extra_args
self.device_id = device_id
self.backend = backend
self.host = host
self.port = port
self.olt_model = None
self._kv_store = ResourceKvStore(technology, device_id, backend,
host, port)
# Below attribute, pon_resource_ranges, should be initialized
# by reading from KV store.
self.pon_resource_ranges = dict()
self.pon_resource_ranges[PONResourceManager.ONU_ID_SHARED_IDX] = None
self.pon_resource_ranges[PONResourceManager.ALLOC_ID_SHARED_IDX] = None
self.pon_resource_ranges[PONResourceManager.GEMPORT_ID_SHARED_IDX] = None
self.shared_resource_mgrs = dict()
self.shared_resource_mgrs[PONResourceManager.ONU_ID_SHARED_IDX] = None
self.shared_resource_mgrs[PONResourceManager.ALLOC_ID_SHARED_IDX] = None
self.shared_resource_mgrs[PONResourceManager.GEMPORT_ID_SHARED_IDX] = None
self.shared_idx_by_type = dict()
self.shared_idx_by_type[PONResourceManager.ONU_ID] = PONResourceManager.ONU_ID_SHARED_IDX
self.shared_idx_by_type[PONResourceManager.ALLOC_ID] = PONResourceManager.ALLOC_ID_SHARED_IDX
self.shared_idx_by_type[PONResourceManager.GEMPORT_ID] = PONResourceManager.GEMPORT_ID_SHARED_IDX
self.intf_ids = None
except Exception as e:
self._log.exception("exception-in-init")
raise Exception(e)
def init_resource_ranges_from_kv_store(self):
"""
Initialize PON resource ranges with config fetched from kv store.
:return boolean: True if PON resource ranges initialized else false
"""
self.olt_model = self._get_olt_model()
# Try to initialize the PON Resource Ranges from KV store based on the
# OLT model key, if available
if self.olt_model is None:
self._log.info("device-model-unavailable--not-reading-from-kv-store")
return False
path = self.PON_RESOURCE_RANGE_CONFIG_PATH.format(self.olt_model)
try:
# get resource from kv store
result = self._kv_store.get_from_kv_store(path)
if result is None:
self._log.debug("resource-range-config-unavailable-on-kvstore")
return False
resource_range_config = result
if resource_range_config is not None:
self.pon_resource_ranges = json.loads(resource_range_config)
self._log.debug("Init-resource-ranges-from-kvstore-success",
pon_resource_ranges=self.pon_resource_ranges,
path=path)
return True
except Exception as e:
self._log.exception("error-initializing-resource-range-from-kv-store",
e=e)
return False
def update_range_(self, start_idx, start, end_idx, end, shared_idx, shared_pool_id, shared_resource_mgr):
if (start is not None) and \
(start_idx not in self.pon_resource_ranges or self.pon_resource_ranges[start_idx] < start):
self.pon_resource_ranges[start_idx] = start
if (end is not None) and \
(end_idx not in self.pon_resource_ranges or self.pon_resource_ranges[end_idx] > end):
self.pon_resource_ranges[end_idx] = end
if (shared_pool_id is not None) and \
(shared_idx not in self.pon_resource_ranges or self.pon_resource_ranges[shared_idx] is None):
self.pon_resource_ranges[shared_idx] = shared_pool_id
if (shared_resource_mgr is not None) and \
(shared_idx not in self.shared_resource_mgrs or self.shared_resource_mgrs[shared_idx] is None):
self.shared_resource_mgrs[shared_idx] = shared_resource_mgr
def update_ranges(self,
onu_id_start_idx=None,
onu_id_end_idx=None,
onu_id_shared_pool_id=None,
onu_id_shared_resource_mgr=None,
alloc_id_start_idx=None,
alloc_id_end_idx=None,
alloc_id_shared_pool_id=None,
alloc_id_shared_resource_mgr=None,
gemport_id_start_idx=None,
gemport_id_end_idx=None,
gemport_id_shared_pool_id=None,
gemport_id_shared_resource_mgr=None):
self.update_range_(PONResourceManager.ONU_ID_START_IDX, onu_id_start_idx,
PONResourceManager.ONU_ID_END_IDX, onu_id_end_idx,
PONResourceManager.ONU_ID_SHARED_IDX, onu_id_shared_pool_id,
onu_id_shared_resource_mgr)
self.update_range_(PONResourceManager.ALLOC_ID_START_IDX, alloc_id_start_idx,
PONResourceManager.ALLOC_ID_END_IDX, alloc_id_end_idx,
PONResourceManager.ALLOC_ID_SHARED_IDX, alloc_id_shared_pool_id,
alloc_id_shared_resource_mgr)
self.update_range_(PONResourceManager.GEMPORT_ID_START_IDX, gemport_id_start_idx,
PONResourceManager.GEMPORT_ID_END_IDX, gemport_id_end_idx,
PONResourceManager.GEMPORT_ID_SHARED_IDX, gemport_id_shared_pool_id,
gemport_id_shared_resource_mgr)
def init_default_pon_resource_ranges(self,
onu_id_start_idx=1,
onu_id_end_idx=127,
onu_id_shared_pool_id=None,
alloc_id_start_idx=1024,
alloc_id_end_idx=2816,
alloc_id_shared_pool_id=None,
gemport_id_start_idx=1024,
gemport_id_end_idx=8960,
gemport_id_shared_pool_id=None,
num_of_pon_ports=16,
intf_ids=None):
"""
Initialize default PON resource ranges
:param onu_id_start_idx: onu id start index
:param onu_id_end_idx: onu id end index
:param onu_id_shared_pool_id: pool idx for id shared by all intfs or None for no sharing
:param alloc_id_start_idx: alloc id start index
:param alloc_id_end_idx: alloc id end index
:param alloc_id_shared_pool_id: pool idx for alloc id shared by all intfs or None for no sharing
:param gemport_id_start_idx: gemport id start index
:param gemport_id_end_idx: gemport id end index
:param gemport_id_shared_pool_id: pool idx for gemport id shared by all intfs or None for no sharing
:param num_of_pon_ports: number of PON ports
:param intf_ids: interfaces serviced by this manager
"""
self._log.info("initialize-default-resource-range-values")
self.update_ranges(onu_id_start_idx, onu_id_end_idx, onu_id_shared_pool_id, None,
alloc_id_start_idx, alloc_id_end_idx, alloc_id_shared_pool_id, None,
gemport_id_start_idx, gemport_id_end_idx, gemport_id_shared_pool_id, None)
if intf_ids is None:
intf_ids = range(0, num_of_pon_ports)
self.intf_ids = intf_ids
def init_device_resource_pool(self):
"""
Initialize resource pool for all PON ports.
"""
self._log.info("init-device-resource-pool", technology=self.technology,
pon_resource_ranges=self.pon_resource_ranges)
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.ONU_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.init_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.ONU_ID,
start_idx=self.pon_resource_ranges[
PONResourceManager.ONU_ID_START_IDX],
end_idx=self.pon_resource_ranges[
PONResourceManager.ONU_ID_END_IDX])
if shared_pool_id is not None: break
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.ALLOC_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.init_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.ALLOC_ID,
start_idx=self.pon_resource_ranges[
PONResourceManager.ALLOC_ID_START_IDX],
end_idx=self.pon_resource_ranges[
PONResourceManager.ALLOC_ID_END_IDX])
if shared_pool_id is not None: break
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.GEMPORT_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.init_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.GEMPORT_ID,
start_idx=self.pon_resource_ranges[
PONResourceManager.GEMPORT_ID_START_IDX],
end_idx=self.pon_resource_ranges[
PONResourceManager.GEMPORT_ID_END_IDX])
if shared_pool_id is not None: break
def clear_device_resource_pool(self):
"""
Clear resource pool of all PON ports.
"""
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.ONU_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.clear_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.ONU_ID,
)
if shared_pool_id is not None: break
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.ALLOC_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.clear_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.ALLOC_ID,
)
if shared_pool_id is not None: break
for i in self.intf_ids:
shared_pool_id = self.pon_resource_ranges[PONResourceManager.GEMPORT_ID_SHARED_IDX]
if shared_pool_id is not None: i = shared_pool_id
self.clear_resource_id_pool(
pon_intf_id=i,
resource_type=PONResourceManager.GEMPORT_ID,
)
if shared_pool_id is not None: break
def init_resource_id_pool(self, pon_intf_id, resource_type, start_idx,
end_idx):
"""
Initialize Resource ID pool for a given Resource Type on a given PON Port
:param pon_intf_id: OLT PON interface id
:param resource_type: String to identify type of resource
:param start_idx: start index for onu id pool
:param end_idx: end index for onu id pool
:return boolean: True if resource id pool initialized else false
"""
status = False
# delegate to the master instance if sharing enabled across instances
shared_resource_mgr = self.shared_resource_mgrs[self.shared_idx_by_type[resource_type]]
if shared_resource_mgr is not None and shared_resource_mgr is not self:
return shared_resource_mgr.init_resource_id_pool(pon_intf_id, resource_type,
start_idx, end_idx)
path = self._get_path(pon_intf_id, resource_type)
if path is None:
return status
try:
# In case of adapter reboot and reconciliation resource in kv store
# checked for its presence if not kv store update happens
resource = self._get_resource(path)
if resource is not None:
self._log.info("Resource-already-present-in-store", path=path)
status = True
else:
resource = self._format_resource(pon_intf_id, start_idx,
end_idx)
self._log.info("Resource-initialized", path=path)
# Add resource as json in kv store.
result = self._kv_store.update_to_kv_store(path, resource)
if result is True:
status = True
except Exception as e:
self._log.exception("error-initializing-resource-pool", e=e)
return status
def get_resource_id(self, pon_intf_id, resource_type, num_of_id=1):
"""
Create alloc/gemport/onu id for given OLT PON interface.
:param pon_intf_id: OLT PON interface id
:param resource_type: String to identify type of resource
:param num_of_id: required number of ids
:return list/int/None: list, int or None if resource type is
alloc_id/gemport_id, onu_id or invalid type
respectively
"""
result = None
# delegate to the master instance if sharing enabled across instances
shared_resource_mgr = self.shared_resource_mgrs[self.shared_idx_by_type[resource_type]]
if shared_resource_mgr is not None and shared_resource_mgr is not self:
return shared_resource_mgr.get_resource_id(pon_intf_id, resource_type, num_of_id)
path = self._get_path(pon_intf_id, resource_type)
if path is None:
return result
try:
resource = self._get_resource(path)
if resource is not None and resource_type == \
PONResourceManager.ONU_ID:
result = self._generate_next_id(resource)
elif resource is not None and (
resource_type == PONResourceManager.GEMPORT_ID or
resource_type == PONResourceManager.ALLOC_ID):
result = list()
while num_of_id > 0:
result.append(self._generate_next_id(resource))
num_of_id -= 1
else:
raise Exception("get-resource-failed")
self._log.debug("Get-" + resource_type + "-success", result=result,
path=path)
# Update resource in kv store
self._update_resource(path, resource)
except Exception as e:
self._log.exception("Get-" + resource_type + "-id-failed",
path=path, e=e)
return result
def free_resource_id(self, pon_intf_id, resource_type, release_content):
"""
Release alloc/gemport/onu id for given OLT PON interface.
:param pon_intf_id: OLT PON interface id
:param resource_type: String to identify type of resource
:param release_content: required number of ids
:return boolean: True if all IDs in given release_content released
else False
"""
status = False
# delegate to the master instance if sharing enabled across instances
shared_resource_mgr = self.shared_resource_mgrs[self.shared_idx_by_type[resource_type]]
if shared_resource_mgr is not None and shared_resource_mgr is not self:
return shared_resource_mgr.free_resource_id(pon_intf_id, resource_type)
path = self._get_path(pon_intf_id, resource_type)
if path is None:
return status
try:
resource = self._get_resource(path)
if resource is not None and resource_type == \
PONResourceManager.ONU_ID:
self._release_id(resource, release_content)
elif resource is not None and (
resource_type == PONResourceManager.ALLOC_ID or
resource_type == PONResourceManager.GEMPORT_ID):
for content in release_content:
self._release_id(resource, content)
else:
raise Exception("get-resource-failed")
self._log.debug("Free-" + resource_type + "-success", path=path)
# Update resource in kv store
status = self._update_resource(path, resource)
except Exception as e:
self._log.exception("Free-" + resource_type + "-failed",
path=path, e=e)
return status
def clear_resource_id_pool(self, pon_intf_id, resource_type):
"""
Clear Resource Pool for a given Resource Type on a given PON Port.
:return boolean: True if removed else False
"""
# delegate to the master instance if sharing enabled across instances
shared_resource_mgr = self.shared_resource_mgrs[self.shared_idx_by_type[resource_type]]
if shared_resource_mgr is not None and shared_resource_mgr is not self:
return shared_resource_mgr.clear_resource_id_pool(pon_intf_id, resource_type)
path = self._get_path(pon_intf_id, resource_type)
if path is None:
return False
try:
result = self._kv_store.remove_from_kv_store(path)
if result is True:
self._log.debug("Resource-pool-cleared",
device_id=self.device_id,
path=path)
return True
except Exception as e:
self._log.exception("error-clearing-resource-pool", e=e)
self._log.error("Clear-resource-pool-failed", device_id=self.device_id,
path=path)
return False
def init_resource_map(self, pon_intf_onu_id):
"""
Initialize resource map
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
# initialize pon_intf_onu_id tuple to alloc_ids map
alloc_id_path = PONResourceManager.ALLOC_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
alloc_ids = list()
self._kv_store.update_to_kv_store(
alloc_id_path, json.dumps(alloc_ids)
)
# initialize pon_intf_onu_id tuple to gemport_ids map
gemport_id_path = PONResourceManager.GEMPORT_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
gemport_ids = list()
self._kv_store.update_to_kv_store(
gemport_id_path, json.dumps(gemport_ids)
)
def remove_resource_map(self, pon_intf_onu_id):
"""
Remove resource map
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
# remove pon_intf_onu_id tuple to alloc_ids map
alloc_id_path = PONResourceManager.ALLOC_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
self._kv_store.remove_from_kv_store(alloc_id_path)
# remove pon_intf_onu_id tuple to gemport_ids map
gemport_id_path = PONResourceManager.GEMPORT_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
self._kv_store.remove_from_kv_store(gemport_id_path)
def get_current_alloc_ids_for_onu(self, pon_intf_onu_id):
"""
Get currently configured alloc ids for given pon_intf_onu_id
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
path = PONResourceManager.ALLOC_ID_RESOURCE_MAP_PATH.format(
self.device_id,
str(pon_intf_onu_id))
value = self._kv_store.get_from_kv_store(path)
if value is not None:
alloc_id_list = json.loads(value)
if len(alloc_id_list) > 0:
return alloc_id_list
return None
def get_current_gemport_ids_for_onu(self, pon_intf_onu_id):
"""
Get currently configured gemport ids for given pon_intf_onu_id
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
path = PONResourceManager.GEMPORT_ID_RESOURCE_MAP_PATH.format(
self.device_id,
str(pon_intf_onu_id))
value = self._kv_store.get_from_kv_store(path)
if value is not None:
gemport_id_list = json.loads(value)
if len(gemport_id_list) > 0:
return gemport_id_list
return None
def update_alloc_ids_for_onu(self, pon_intf_onu_id, alloc_ids):
"""
Update currently configured alloc ids for given pon_intf_onu_id
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
path = PONResourceManager.ALLOC_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
self._kv_store.update_to_kv_store(
path, json.dumps(alloc_ids)
)
def update_gemport_ids_for_onu(self, pon_intf_onu_id, gemport_ids):
"""
Update currently configured gemport ids for given pon_intf_onu_id
:param pon_intf_onu_id: reference of PON interface id and onu id
"""
path = PONResourceManager.GEMPORT_ID_RESOURCE_MAP_PATH.format(
self.device_id, str(pon_intf_onu_id)
)
self._kv_store.update_to_kv_store(
path, json.dumps(gemport_ids)
)
def _get_olt_model(self):
"""
Get olt model variant
:return: type of olt model
"""
olt_model = None
if self.extra_args and len(self.extra_args) > 0:
parser = OltVendorArgumentParser(add_help=False)
parser.add_argument(PONResourceManager.OLT_MODEL_ARG, '-m', action='store', default='default')
try:
args = parser.parse_args(shlex.split(self.extra_args))
self._log.debug('parsing-extra-arguments', args=args)
olt_model = args.olt_model
except ArgumentError as e:
self._log.exception('invalid-arguments: {}', e=e)
except Exception as e:
self._log.exception('option-parsing-error: {}', e=e)
self._log.debug('olt-model', olt_model=olt_model)
return olt_model
def _generate_next_id(self, resource):
"""
Generate unique id having OFFSET as start index.
:param resource: resource used to generate ID
:return int: generated id
"""
pos = resource[PONResourceManager.POOL].find('0b0')
resource[PONResourceManager.POOL].set(1, pos)
return pos[0] + resource[PONResourceManager.START_IDX]
def _release_id(self, resource, unique_id):
"""
Release unique id having OFFSET as start index.
:param resource: resource used to release ID
:param unique_id: id need to be released
"""
pos = ((int(unique_id)) - resource[PONResourceManager.START_IDX])
resource[PONResourceManager.POOL].set(0, pos)
def _get_path(self, pon_intf_id, resource_type):
"""
Get path for given resource type.
:param pon_intf_id: OLT PON interface id
:param resource_type: String to identify type of resource
:return: path for given resource type
"""
shared_pool_id = self.pon_resource_ranges[self.shared_idx_by_type[resource_type]]
if shared_pool_id is not None: pon_intf_id = shared_pool_id
path = None
if resource_type == PONResourceManager.ONU_ID:
path = self._get_onu_id_resource_path(pon_intf_id)
elif resource_type == PONResourceManager.ALLOC_ID:
path = self._get_alloc_id_resource_path(pon_intf_id)
elif resource_type == PONResourceManager.GEMPORT_ID:
path = self._get_gemport_id_resource_path(pon_intf_id)
else:
self._log.error("invalid-resource-pool-identifier")
return path
def _get_alloc_id_resource_path(self, pon_intf_id):
"""
Get alloc id resource path.
:param pon_intf_id: OLT PON interface id
:return: alloc id resource path
"""
return PONResourceManager.ALLOC_ID_POOL_PATH.format(
self.device_id, pon_intf_id)
def _get_gemport_id_resource_path(self, pon_intf_id):
"""
Get gemport id resource path.
:param pon_intf_id: OLT PON interface id
:return: gemport id resource path
"""
return PONResourceManager.GEMPORT_ID_POOL_PATH.format(
self.device_id, pon_intf_id)
def _get_onu_id_resource_path(self, pon_intf_id):
"""
Get onu id resource path.
:param pon_intf_id: OLT PON interface id
:return: onu id resource path
"""
return PONResourceManager.ONU_ID_POOL_PATH.format(
self.device_id, pon_intf_id)
def _update_resource(self, path, resource):
"""
Update resource in resource kv store.
:param path: path to update resource
:param resource: resource need to be updated
:return boolean: True if resource updated in kv store else False
"""
resource[PONResourceManager.POOL] = \
resource[PONResourceManager.POOL].bin
result = self._kv_store.update_to_kv_store(path, json.dumps(resource))
if result is True:
return True
return False
def _get_resource(self, path):
"""
Get resource from kv store.
:param path: path to get resource
:return: resource if resource present in kv store else None
"""
# get resource from kv store
result = self._kv_store.get_from_kv_store(path)
if result is None:
return result
self._log.info("dumping resource", result=result)
resource = result
if resource is not None:
# decode resource fetched from backend store to dictionary
resource = json.loads(resource)
# resource pool in backend store stored as binary string whereas to
# access the pool to generate/release IDs it need to be converted
# as BitArray
resource[PONResourceManager.POOL] = \
BitArray('0b' + resource[PONResourceManager.POOL])
return resource
def _format_resource(self, pon_intf_id, start_idx, end_idx):
"""
Format resource as json.
:param pon_intf_id: OLT PON interface id
:param start_idx: start index for id pool
:param end_idx: end index for id pool
:return dictionary: resource formatted as dictionary
"""
# Format resource as json to be stored in backend store
resource = dict()
resource[PONResourceManager.PON_INTF_ID] = pon_intf_id
resource[PONResourceManager.START_IDX] = start_idx
resource[PONResourceManager.END_IDX] = end_idx
# resource pool stored in backend store as binary string
resource[PONResourceManager.POOL] = BitArray(end_idx).bin
return json.dumps(resource)