Merge from trunk

[plcapi.git] / trunk / PLC / BootStates.py

diff --git a/trunk/PLC/BootStates.py b/trunk/PLC/BootStates.py
new file mode 100644 (file)
index 0000000..f1bfcf9
--- /dev/null
+++ b/trunk/PLC/BootStates.py
@@ -0,0 +1,53 @@
+#
+# Functions for interacting with the boot_states table in the database
+#
+# Mark Huang <mlhuang@cs.princeton.edu>
+# Copyright (C) 2006 The Trustees of Princeton University
+#
+# $Id$
+#
+
+from PLC.Faults import *
+from PLC.Parameter import Parameter
+from PLC.Table import Row, Table
+
+class BootState(Row):
+    """
+    Representation of a row in the boot_states table. To use,
+    instantiate with a dict of values.
+    """
+
+    table_name = 'boot_states'
+    primary_key = 'boot_state'
+    join_tables = ['nodes']
+    fields = {
+        'boot_state': Parameter(str, "Boot state", max = 20),
+        }
+
+    def validate_boot_state(self, name):
+       # Make sure name is not blank
+        if not len(name):
+            raise PLCInvalidArgument, "Boot state must be specified"
+       
+       # Make sure boot state does not alredy exist
+       conflicts = BootStates(self.api, [name])
+        if conflicts:
+            raise PLCInvalidArgument, "Boot state name already in use"
+
+       return name
+
+class BootStates(Table):
+    """
+    Representation of the boot_states table in the database.
+    """
+
+    def __init__(self, api, boot_states = None):
+        Table.__init__(self, api, BootState)
+
+        sql = "SELECT %s FROM boot_states" % \
+              ", ".join(BootState.fields)
+        
+        if boot_states:
+            sql += " WHERE boot_state IN (%s)" % ", ".join(map(api.db.quote, boot_states))
+
+        self.selectall(sql)