Replaced initial implementation - now supports updating fields. A bit more query heavy now, but should not cause any problems

1 files changed, 89 insertions, 0 deletions

diff --git a/junos-bootstrap/dhcpd/module_lease.py b/junos-bootstrap/dhcpd/module_lease.py
index 8538723..306f13a 100644
--- a/junos-bootstrap/dhcpd/module_lease.py
+++ b/junos-bootstrap/dhcpd/module_lease.py
@@ -83,3 +83,92 @@ class lease(object):
         else:
             print('identifiers (%s) not found' % self.row)
             return False
+
+
+#
+# TESTING - Bruker ID fra DB-en som identifier, og kjører en query per lease.get_x()
+#
+class lease2(object):
+    debug = False
+    hostname = False
+    identifiers = False
+    
+    # identifiers = dict of field/values
+    def __init__(self, identifiers):
+        cur = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
+    
+        if len(identifiers) > 0: # 1 or more identifiers - we're good to go
+            self.identifiers = identifiers # Used to debug if no match for the identifiers is given
+            
+            # build query string
+            where_pieces = []
+            for identifier in identifiers.items():
+                where_pieces.append(str(identifier[0]) + " = '" + str(identifier[1]) + "'")
+            where = ' AND '.join(where_pieces)
+            select = "SELECT hostname FROM switches WHERE " + where + " LIMIT 1"
+            
+            if self.debug is True:
+                print('Executing query: ' + select)
+            
+            cur.execute(select)
+            rows = cur.fetchall()
+            cur.close()
+            if len(rows) is 1:
+                if self.debug is True:
+                    print('returned from DB:')
+                    print(rows[0][0])
+                self.hostname = rows[0][0]
+            else:
+                self.hostname = False
+        else:
+            print('Missing identifier parameter')
+            exit()
+            
+    # Used to fetch fields from DB
+    def get(self, field):
+        if self.hostname is not False:
+            cur = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
+        
+            query = "SELECT %s FROM switches WHERE hostname = '%s' LIMIT 1" % (field, self.hostname)
+            if self.debug is True:
+                print('Query: %s' % query)
+            
+            try:
+                cur.execute(query)
+                rows = cur.fetchall()
+                
+                if len(rows) is 1:
+                    if self.debug is True:
+                        print('returned from DB:')
+                        print(rows[0][0])
+                    return rows[0][0]
+                else:
+                    if self.debug is True:
+                        print('No data found - field: %s' % field)
+                    return False
+            except psycopg2.ProgrammingError:
+                print('Field (%s) not found' % field)
+                conn.rollback() # Prevents DB from locking up the next queries - http://initd.org/psycopg/docs/connection.html#connection.rollback
+                return False
+        else:
+            print('identifiers (%s) not found' % self.identifiers)
+            return False
+            
+    # Used to set fields in DB
+    def set(self, field, value):
+        if self.hostname is not False:
+            cur = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
+            query = "UPDATE switches SET %s = '%s' WHERE hostname = '%s'" % (field, value, self.hostname)
+            if self.debug is True:
+                print('Query: %s' % query)
+            try:
+                cur.execute(query)
+                conn.commit()
+                return True
+            except psycopg2.ProgrammingError:
+                print('Field (%s) not found' % field)
+                conn.rollback()
+                return False
+        else:
+            print('identifiers (%s) not found' % self.identifiers)
+            return False