Merge Master in geni-v3 conflict resolution

[sfa.git] / sfa / storage / alchemy.py

diff --git a/sfa/storage/alchemy.py b/sfa/storage/alchemy.py
index 84879a6..e9f96dd 100644 (file)
--- a/sfa/storage/alchemy.py
+++ b/sfa/storage/alchemy.py
@@ -4,13 +4,12 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 
 from sqlalchemy import Column, Integer, String
-from sqlalchemy.orm import relationship, backref
 from sqlalchemy import ForeignKey
 
 from sfa.util.sfalogging import logger
 
 # this module is designed to be loaded when the configured db server is reachable
-# OTOH persistentobjs can be loaded from anywhere including the client-side
+# OTOH model can be loaded from anywhere including the client-side
 
 class Alchemy:
 
@@ -25,21 +24,23 @@ class Alchemy:
         # we indeed have /var/lib/pgsql/data/postgresql.conf where
         # this setting is unset, it might be an angle to tweak that if need be
         # try a unix socket first - omitting the hostname does the trick
-        unix_desc = "postgresql+psycopg2://%s:%s@:%s/%s"%\
+        unix_url = "postgresql+psycopg2://%s:%s@:%s/%s"%\
             (config.SFA_DB_USER,config.SFA_DB_PASSWORD,config.SFA_DB_PORT,dbname)
         # the TCP fallback method
-        tcp_desc = "postgresql+psycopg2://%s:%s@%s:%s/%s"%\
+        tcp_url = "postgresql+psycopg2://%s:%s@%s:%s/%s"%\
             (config.SFA_DB_USER,config.SFA_DB_PASSWORD,config.SFA_DB_HOST,config.SFA_DB_PORT,dbname)
-        for engine_desc in [ unix_desc, tcp_desc ] :
+        for url in [ unix_url, tcp_url ] :
             try:
-                self.engine = create_engine (engine_desc)
+                logger.debug("Trying db URL %s"%url)
+                self.engine = create_engine (url)
                 self.check()
+                self.url=url
                 return
             except:
                 pass
         self.engine=None
-        raise Exception,"Could not connect to database"
-                
+        raise Exception,"Could not connect to database %s as %s with psycopg2"%(dbname,config.SFA_DB_USER)
+
 
     # expects boolean True: debug is ON or False: debug is OFF
     def debug (self, echo):