88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
"""Manage hdsdiscovery functionalities"""
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import os
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import re
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import logging
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from compass.hdsdiscovery import utils
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class HDManager:
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"""Process a request."""
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def __init__(self):
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base_dir = os.path.dirname(os.path.realpath(__file__))
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self.vendors_dir = os.path.join(base_dir, 'vendors')
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self.vendor_plugins_dir = os.path.join(self.vendors_dir, '?/plugins')
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def learn(self, host, credential, vendor, req_obj, oper="SCAN", **kwargs):
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"""Insert/update record of switch_info. Get expected results from
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switch according to sepcific operation.
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:param req_obj: the object of a machine
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:param host: switch IP address
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:param credientials: credientials to access switch
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:param oper: operations of the plugin (SCAN, GETONE, SET)
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:param kwargs(optional): key-value pairs
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"""
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plugin_dir = self.vendor_plugins_dir.replace('?', vendor)
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if not os.path.exists(plugin_dir):
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logging.error('No such directory: %s', plugin_dir)
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return None
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plugin = utils.load_module(req_obj, plugin_dir, host, credential)
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if not plugin:
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# No plugin found!
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#TODO add more code to catch excpetion or unexpected state
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logging.error('no plugin %s to load from %s', req_obj, plugin_dir)
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return None
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return plugin.process_data(oper)
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def is_valid_vendor(self, host, credential, vendor):
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""" Check if vendor is associated with this host and credential
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:param host: switch ip
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:param credential: credential to access switch
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:param vendor: the vendor of switch
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"""
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vendor_dir = os.path.join(self.vendors_dir, vendor)
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if not os.path.exists(vendor_dir):
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logging.error('no such directory: %s', vendor_dir)
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return False
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vendor_instance = utils.load_module(vendor, vendor_dir)
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#TODO add more code to catch excpetion or unexpected state
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if not vendor_instance:
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# Cannot found the vendor in the directory!
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logging.error('no vendor instance %s load from %s',
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vendor, vendor_dir)
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return False
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return vendor_instance.is_this_vendor(host, credential)
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def get_vendor(self, host, credential):
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""" Check and get vendor of the switch.
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:param host: switch ip:
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:param credential: credential to access switch
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"""
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# List all vendors in vendors directory -- a directory but hidden
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# under ../vendors
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all_vendors = [o for o in os.listdir(self.vendors_dir)
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if os.path.isdir(os.path.join(self.vendors_dir, o))
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and re.match(r'^[^\.]', o)]
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logging.debug("[get_vendor]: %s ", all_vendors)
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for vname in all_vendors:
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vpath = os.path.join(self.vendors_dir, vname)
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instance = utils.load_module(vname, vpath)
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#TODO add more code to catch excpetion or unexpected state
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if not instance:
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logging.error('no instance %s load from %s', vname, vpath)
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continue
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if instance.is_this_vendor(host, credential):
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return vname
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return None
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