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##############################################################################
# Copyright (c) 2015 Huawei Technologies Co.,Ltd and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import logging
import stevedore
LOG = logging.getLogger(__name__)
class PluginManager(object):
def __init__(self):
self.instance = None
self.saved = {}
def build(self, cfg):
scheme = cfg["scheme"]
if scheme in self.saved:
# reuse old instance
self.instance = self.saved[scheme]
else:
mgr = stevedore.driver.DriverManager(namespace="env_build.plugins",
name=scheme,
invoke_on_load=False)
self.instance = mgr.driver()
self.saved[scheme] = self.instance
self.instance.clean()
return self.instance.build(cfg)
def clean(self):
if self.instance:
self.instance.clean()
self.instance = None
if __name__ == "__main__":
import argparse
from vstf.controller.env_build.env_build import IntentParser
parser = argparse.ArgumentParser()
parser.add_argument('--config', help='config file to parse')
args = parser.parse_args()
logging.basicConfig(level=logging.INFO)
parser = IntentParser(args.config)
cfg_intent = parser.parse_cfg_file()
for host_cfg in cfg_intent['env-build']:
tn = PluginManager()
tn.build(host_cfg)
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