504 lines
16 KiB
Python
504 lines
16 KiB
Python
"""
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Common support for configurable CORE objects.
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"""
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import string
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from core.data import ConfigData
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from core.enumerations import ConfigDataTypes
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from core.enumerations import ConfigFlags
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from core.misc import log
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logger = log.get_logger(__name__)
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class ConfigurableManager(object):
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"""
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A generic class for managing Configurables. This class can register
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with a session to receive Config Messages for setting some parameters
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for itself or for the Configurables that it manages.
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"""
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# name corresponds to configuration object field
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name = ""
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# type corresponds with register message types
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config_type = None
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def __init__(self):
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"""
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Creates a ConfigurableManager instance.
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:param core.session.Session session: session this manager is tied to
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:return: nothing
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"""
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# configurable key=values, indexed by node number
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self.configs = {}
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# TODO: fix the need for this and isolate to the mobility class that wants it
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self._modelclsmap = {}
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def configure(self, session, config_data):
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"""
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Handle configure messages. The configuration message sent to a
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ConfigurableManager usually is used to:
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1. Request a list of Configurables (request flag)
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2. Reset manager and clear configs (reset flag)
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3. Send values that configure the manager or one of its
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Configurables
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Returns any reply messages.
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:param core.session.Session session: CORE session object
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:param ConfigData config_data: configuration data for carrying out a configuration
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:return: response messages
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"""
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if config_data.type == ConfigFlags.REQUEST.value:
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return self.configure_request(config_data)
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elif config_data.type == ConfigFlags.RESET.value:
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return self.configure_reset(config_data)
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else:
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return self.configure_values(config_data)
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def configure_request(self, config_data):
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"""
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Request configuration data.
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:param ConfigData config_data: configuration data for carrying out a configuration
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:return: nothing
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"""
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return None
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def configure_reset(self, config_data):
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"""
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By default, resets this manager to clear configs.
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:param ConfigData config_data: configuration data for carrying out a configuration
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:return: reset response messages, or None
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"""
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return self.reset()
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def configure_values(self, config_data):
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"""
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Values have been sent to this manager.
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:param ConfigData config_data: configuration data for carrying out a configuration
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:return: nothing
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"""
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return None
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def configure_values_keyvalues(self, config_data, target, keys):
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"""
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Helper that can be used for configure_values for parsing in
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'key=value' strings from a values field. The key name must be
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in the keys list, and target.key=value is set.
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:param ConfigData config_data: configuration data for carrying out a configuration
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:param target: target to set attribute values on
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:param keys: list of keys to verify validity
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:return: nothing
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"""
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values = config_data.data_values
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if values is None:
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return None
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kvs = values.split('|')
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for kv in kvs:
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try:
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key, value = kv.split('=', 1)
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if value is not None and not value.strip():
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value = None
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except ValueError:
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# value only
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key = keys[kvs.index(kv)]
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value = kv
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if key not in keys:
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raise ValueError("invalid key: %s" % key)
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if value is not None:
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setattr(target, key, value)
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return None
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def reset(self):
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"""
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Reset functionality for the configurable class.
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:return: nothing
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"""
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return None
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def setconfig(self, nodenum, conftype, values):
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"""
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Add configuration values for a node to a dictionary; values are
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usually received from a Configuration Message, and may refer to a
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node for which no object exists yet
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:param int nodenum: node id
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:param conftype: configuration types
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:param values: configuration values
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:return: nothing
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"""
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logger.info("setting config for node(%s): %s - %s", nodenum, conftype, values)
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conflist = []
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if nodenum in self.configs:
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oldlist = self.configs[nodenum]
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found = False
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for t, v in oldlist:
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if t == conftype:
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# replace existing config
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found = True
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conflist.append((conftype, values))
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else:
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conflist.append((t, v))
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if not found:
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conflist.append((conftype, values))
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else:
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conflist.append((conftype, values))
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self.configs[nodenum] = conflist
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def getconfig(self, nodenum, conftype, defaultvalues):
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"""
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Get configuration values for a node; if the values don't exist in
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our dictionary then return the default values supplied
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:param int nodenum: node id
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:param conftype: configuration type
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:param defaultvalues: default values
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:return: configuration type and default values
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:type: tuple
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"""
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logger.info("getting config for node(%s): %s - default(%s)",
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nodenum, conftype, defaultvalues)
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if nodenum in self.configs:
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# return configured values
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conflist = self.configs[nodenum]
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for t, v in conflist:
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if conftype is None or t == conftype:
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return t, v
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# return default values provided (may be None)
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return conftype, defaultvalues
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def getallconfigs(self, use_clsmap=True):
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"""
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Return (nodenum, conftype, values) tuples for all stored configs.
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Used when reconnecting to a session.
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:param bool use_clsmap: should a class map be used, default to True
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:return: list of all configurations
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:rtype: list
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"""
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r = []
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for nodenum in self.configs:
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for t, v in self.configs[nodenum]:
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if use_clsmap:
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t = self._modelclsmap[t]
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r.append((nodenum, t, v))
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return r
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def clearconfig(self, nodenum):
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"""
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remove configuration values for the specified node;
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when nodenum is None, remove all configuration values
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:param int nodenum: node id
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:return: nothing
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"""
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if nodenum is None:
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self.configs = {}
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return
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if nodenum in self.configs:
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self.configs.pop(nodenum)
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def setconfig_keyvalues(self, nodenum, conftype, keyvalues):
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"""
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Key values list of tuples for a node.
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:param int nodenum: node id
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:param conftype: configuration type
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:param keyvalues: key valyes
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:return: nothing
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"""
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if conftype not in self._modelclsmap:
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logger.warn("Unknown model type '%s'" % conftype)
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return
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model = self._modelclsmap[conftype]
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keys = model.getnames()
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# defaults are merged with supplied values here
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values = list(model.getdefaultvalues())
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for key, value in keyvalues:
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if key not in keys:
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logger.warn("Skipping unknown configuration key for %s: '%s'" % \
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(conftype, key))
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continue
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i = keys.index(key)
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values[i] = value
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self.setconfig(nodenum, conftype, values)
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def getmodels(self, n):
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"""
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Return a list of model classes and values for a net if one has been
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configured. This is invoked when exporting a session to XML.
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This assumes self.configs contains an iterable of (model-names, values)
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and a self._modelclsmapdict exists.
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:param n: network node to get models for
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:return: list of model and values tuples for the network node
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:rtype: list
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"""
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r = []
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if n.objid in self.configs:
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v = self.configs[n.objid]
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for model in v:
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cls = self._modelclsmap[model[0]]
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vals = model[1]
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r.append((cls, vals))
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return r
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class Configurable(object):
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"""
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A generic class for managing configuration parameters.
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Parameters are sent via Configuration Messages, which allow the GUI
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to build dynamic dialogs depending on what is being configured.
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"""
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name = ""
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# Configuration items:
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# ('name', 'type', 'default', 'possible-value-list', 'caption')
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config_matrix = []
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config_groups = None
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bitmap = None
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def __init__(self, session=None, object_id=None):
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"""
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Creates a Configurable instance.
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:param core.session.Session session: session for this configurable
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:param object_id:
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"""
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self.session = session
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self.object_id = object_id
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def reset(self):
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"""
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Reset method.
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:return: nothing
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"""
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pass
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def register(self):
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"""
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Register method.
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:return: nothing
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"""
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pass
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@classmethod
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def getdefaultvalues(cls):
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"""
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Retrieve default values from configuration matrix.
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:return: tuple of default values
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:rtype: tuple
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"""
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# TODO: why the need for a tuple?
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return tuple(map(lambda x: x[2], cls.config_matrix))
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@classmethod
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def getnames(cls):
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"""
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Retrieve name values from configuration matrix.
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:return: tuple of name values
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:rtype: tuple
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"""
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# TODO: why the need for a tuple?
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return tuple(map(lambda x: x[0], cls.config_matrix))
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@classmethod
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def configure(cls, manager, config_data):
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"""
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Handle configuration messages for this object.
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:param ConfigurableManager manager: configuration manager
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:param config_data: configuration data
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:return: configuration data object
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:rtype: ConfigData
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"""
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reply = None
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node_id = config_data.node
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object_name = config_data.object
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config_type = config_data.type
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interface_id = config_data.interface_number
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values_str = config_data.data_values
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if interface_id is not None:
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node_id = node_id * 1000 + interface_id
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logger.info("received configure message for %s nodenum:%s", cls.name, str(node_id))
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if config_type == ConfigFlags.REQUEST.value:
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logger.info("replying to configure request for %s model", cls.name)
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# when object name is "all", the reply to this request may be None
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# if this node has not been configured for this model; otherwise we
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# reply with the defaults for this model
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if object_name == "all":
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defaults = None
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typeflags = ConfigFlags.UPDATE.value
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else:
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defaults = cls.getdefaultvalues()
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typeflags = ConfigFlags.NONE.value
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values = manager.getconfig(node_id, cls.name, defaults)[1]
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if values is None:
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logger.warn("no active configuration for node (%s), ignoring request")
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# node has no active config for this model (don't send defaults)
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return None
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# reply with config options
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reply = cls.config_data(0, node_id, typeflags, values)
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elif config_type == ConfigFlags.RESET.value:
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if object_name == "all":
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manager.clearconfig(node_id)
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# elif conftype == coreapi.CONF_TYPE_FLAGS_UPDATE:
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else:
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# store the configuration values for later use, when the node
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# object has been created
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if object_name is None:
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logger.info("no configuration object for node %s", node_id)
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return None
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defaults = cls.getdefaultvalues()
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if values_str is None:
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# use default or preconfigured values
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values = manager.getconfig(node_id, cls.name, defaults)[1]
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else:
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# use new values supplied from the conf message
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values = values_str.split('|')
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# determine new or old style config
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new = cls.haskeyvalues(values)
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if new:
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new_values = list(defaults)
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keys = cls.getnames()
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for v in values:
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key, value = v.split('=', 1)
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try:
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new_values[keys.index(key)] = value
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except ValueError:
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logger.info("warning: ignoring invalid key '%s'" % key)
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values = new_values
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manager.setconfig(node_id, object_name, values)
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return reply
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@classmethod
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def config_data(cls, flags, node_id, type_flags, values):
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"""
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Convert this class to a Config API message. Some TLVs are defined
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by the class, but node number, conf type flags, and values must
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be passed in.
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:param flags: message flags
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:param int node_id: node id
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:param type_flags: type flags
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:param values: values
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:return: configuration data object
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:rtype: ConfigData
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"""
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keys = cls.getnames()
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keyvalues = map(lambda a, b: "%s=%s" % (a, b), keys, values)
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values_str = string.join(keyvalues, '|')
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datatypes = tuple(map(lambda x: x[1], cls.config_matrix))
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captions = reduce(lambda a, b: a + '|' + b, map(lambda x: x[4], cls.config_matrix))
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possible_valuess = reduce(lambda a, b: a + '|' + b, map(lambda x: x[3], cls.config_matrix))
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return ConfigData(
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message_type=flags,
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node=node_id,
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object=cls.name,
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type=type_flags,
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data_types=datatypes,
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data_values=values_str,
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captions=captions,
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possible_values=possible_valuess,
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bitmap=cls.bitmap,
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groups=cls.config_groups
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)
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@staticmethod
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def booltooffon(value):
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"""
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Convenience helper turns bool into on (True) or off (False) string.
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:param str value: value to retrieve on/off value for
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:return: on or off string
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:rtype: str
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"""
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if value == "1" or value == "true" or value == "on":
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return "on"
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else:
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return "off"
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@staticmethod
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def offontobool(value):
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"""
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Convenience helper for converting an on/off string to a integer.
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:param str value: on/off string
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:return: on/off integer value
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:rtype: int
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"""
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if type(value) == str:
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if value.lower() == "on":
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return 1
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elif value.lower() == "off":
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return 0
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return value
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@classmethod
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def valueof(cls, name, values):
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"""
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Helper to return a value by the name defined in confmatrix.
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Checks if it is boolean
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:param str name: name to get value of
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:param values: values to get value from
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:return: value for name
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"""
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i = cls.getnames().index(name)
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if cls.config_matrix[i][1] == ConfigDataTypes.BOOL.value and values[i] != "":
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return cls.booltooffon(values[i])
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else:
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return values[i]
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@staticmethod
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def haskeyvalues(values):
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"""
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Helper to check for list of key=value pairs versus a plain old
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list of values. Returns True if all elements are "key=value".
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:param values: items to check for key/value pairs
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:return: True if all values are key/value pairs, False otherwise
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:rtype: bool
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"""
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if len(values) == 0:
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return False
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for v in values:
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if "=" not in v:
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return False
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return True
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def getkeyvaluelist(self):
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"""
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Helper to return a list of (key, value) tuples. Keys come from
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configuration matrix and values are instance attributes.
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:return: tuples of key value pairs
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:rtype: list
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"""
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key_values = []
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for name in self.getnames():
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if hasattr(self, name):
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value = getattr(self, name)
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key_values.append((name, value))
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return key_values
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