# # Functions for interacting with the nodegroups table in the database # # Mark Huang # Copyright (C) 2006 The Trustees of Princeton University # # $Id: NodeGroups.py 5666 2007-11-06 21:52:21Z tmack $ # from types import StringTypes from PLC.Faults import * from PLC.Parameter import Parameter, Mixed from PLC.Filter import Filter from PLC.Debug import profile from PLC.Table import Row, Table from PLC.Nodes import Node, Nodes class NodeGroup(Row): """ Representation of a row in the nodegroups table. To use, optionally instantiate with a dict of values. Update as you would a dict. Commit to the database with sync(). """ table_name = 'nodegroups' primary_key = 'nodegroup_id' join_tables = ['nodegroup_node', 'conf_file_nodegroup'] fields = { 'nodegroup_id': Parameter(int, "Node group identifier"), 'name': Parameter(str, "Node group name", max = 50), 'description': Parameter(str, "Node group description", max = 200, nullok = True), 'node_ids': Parameter([int], "List of nodes in this node group"), 'conf_file_ids': Parameter([int], "List of configuration files specific to this node group"), } related_fields = { 'conf_files': [Parameter(int, "ConfFile identifier")], 'nodes': [Mixed(Parameter(int, "Node identifier"), Parameter(str, "Fully qualified hostname"))] } def validate_name(self, name): # Make sure name is not blank if not len(name): raise PLCInvalidArgument, "Invalid node group name" # Make sure node group does not alredy exist conflicts = NodeGroups(self.api, [name]) for nodegroup in conflicts: if 'nodegroup_id' not in self or self['nodegroup_id'] != nodegroup['nodegroup_id']: raise PLCInvalidArgument, "Node group name already in use" return name def add_node(self, node, commit = True): """ Add node to existing nodegroup. """ assert 'nodegroup_id' in self assert isinstance(node, Node) assert 'node_id' in node node_id = node['node_id'] nodegroup_id = self['nodegroup_id'] if node_id not in self['node_ids']: assert nodegroup_id not in node['nodegroup_ids'] self.api.db.do("INSERT INTO nodegroup_node (nodegroup_id, node_id)" \ " VALUES(%(nodegroup_id)d, %(node_id)d)", locals()) if commit: self.api.db.commit() self['node_ids'].append(node_id) node['nodegroup_ids'].append(nodegroup_id) def remove_node(self, node, commit = True): """ Remove node from existing nodegroup. """ assert 'nodegroup_id' in self assert isinstance(node, Node) assert 'node_id' in node node_id = node['node_id'] nodegroup_id = self['nodegroup_id'] if node_id in self['node_ids']: assert nodegroup_id in node['nodegroup_ids'] self.api.db.do("DELETE FROM nodegroup_node" \ " WHERE nodegroup_id = %(nodegroup_id)d" \ " AND node_id = %(node_id)d", locals()) if commit: self.api.db.commit() self['node_ids'].remove(node_id) node['nodegroup_ids'].remove(nodegroup_id) def associate_nodes(self, auth, field, value): """ Adds nodes found in value list to this nodegroup (using AddNodeToNodeGroup). Deletes nodes not found in value list from this slice (using DeleteNodeFromNodeGroup). """ assert 'node_ids' in self assert 'nodegroup_id' in self assert isinstance(value, list) (node_ids, hostnames) = self.separate_types(value)[0:2] # Translate hostnames into node_ids if hostnames: nodes = Nodes(self.api, hostnames, ['node_id']).dict('node_id') node_ids += nodes.keys() # Add new ids, remove stale ids if self['node_ids'] != node_ids: from PLC.Methods.AddNodeToNodeGroup import AddNodeToNodeGroup from PLC.Methods.DeleteNodeFromNodeGroup import DeleteNodeFromNodeGroup new_nodes = set(node_ids).difference(self['node_ids']) stale_nodes = set(self['node_ids']).difference(node_ids) for new_node in new_nodes: AddNodeToNodeGroup.__call__(AddNodeToNodeGroup(self.api), auth, new_node, self['nodegroup_id']) for stale_node in stale_nodes: DeleteNodeFromNodeGroup.__call__(DeleteNodeFromNodeGroup(self.api), auth, stale_node, self['nodegroup_id']) def associate_conf_files(self, auth, field, value): """ Add conf_files found in value list (AddConfFileToNodeGroup) Delets conf_files not found in value list (DeleteConfFileFromNodeGroup) """ assert 'conf_file_ids' in self assert 'nodegroup_id' in self assert isinstance(value, list) conf_file_ids = self.separate_types(value)[0] if self['conf_file_ids'] != conf_file_ids: from PLC.Methods.AddConfFileToNodeGroup import AddConfFileToNodeGroup from PLC.Methods.DeleteConfFileFromNodeGroup import DeleteConfFileFromNodeGroup new_conf_files = set(conf_file_ids).difference(self['conf_file_ids']) stale_conf_files = set(self['conf_file_ids']).difference(conf_file_ids) for new_conf_file in new_conf_files: AddConfFileToNodeGroup.__call__(AddConfFileToNodeGroup(self.api), auth, new_conf_file, self['nodegroup_id']) for stale_conf_file in stale_conf_files: DeleteConfFileFromNodeGroup.__call__(DeleteConfFileFromNodeGroup(self.api), auth, stale_conf_file, self['nodegroup_id']) class NodeGroups(Table): """ Representation of row(s) from the nodegroups table in the database. """ def __init__(self, api, nodegroup_filter = None, columns = None): Table.__init__(self, api, NodeGroup, columns) sql = "SELECT %s FROM view_nodegroups WHERE True" % \ ", ".join(self.columns) if nodegroup_filter is not None: if isinstance(nodegroup_filter, (list, tuple, set)): # Separate the list into integers and strings ints = filter(lambda x: isinstance(x, (int, long)), nodegroup_filter) strs = filter(lambda x: isinstance(x, StringTypes), nodegroup_filter) nodegroup_filter = Filter(NodeGroup.fields, {'nodegroup_id': ints, 'name': strs}) sql += " AND (%s) %s" % nodegroup_filter.sql(api, "OR") elif isinstance(nodegroup_filter, dict): nodegroup_filter = Filter(NodeGroup.fields, nodegroup_filter) sql += " AND (%s) %s" % nodegroup_filter.sql(api, "AND") self.selectall(sql)