--- /dev/null
+#
+# Functions for interacting with the nodegroups table in the database
+#
+# Mark Huang <mlhuang@cs.princeton.edu>
+# Copyright (C) 2006 The Trustees of Princeton University
+#
+# $Id$
+#
+
+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)
git://git.onelab.eu / plcapi.git / blobdiff