-import sys
-
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sfa.util.config import Config
from sfa.util.sfalogging import logger
-from sqlalchemy import Column, Integer, String, DateTime
-from sqlalchemy import Table, Column, MetaData, join, ForeignKey
-import sfa.storage.model as model
-
+from sqlalchemy import Column, Integer, String
+from sqlalchemy import Table, MetaData
from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import relationship, backref
+from sqlalchemy.dialects import postgresql
-from sqlalchemy import MetaData, Table
from sqlalchemy.exc import NoSuchTableError
+
#Dict holding the columns names of the table as keys
#and their type, used for creation of the table
-slice_table = {'record_id_user':'integer PRIMARY KEY references X ON DELETE CASCADE ON UPDATE CASCADE','oar_job_id':'integer DEFAULT -1', 'record_id_slice':'integer', 'slice_hrn':'text NOT NULL'}
+slice_table = {'record_id_user': 'integer PRIMARY KEY references X ON DELETE \
+CASCADE ON UPDATE CASCADE','oar_job_id':'integer DEFAULT -1', \
+'record_id_slice':'integer', 'slice_hrn':'text NOT NULL'}
#Dict with all the specific senslab tables
-tablenames_dict = {'slice_senslab': slice_table}
+tablenames_dict = {'slab_xp': slice_table}
-##############################
+SlabBase = declarative_base()
-SlabBase = declarative_base()
+
+class SenslabXP (SlabBase):
+ """ SQL alchemy class to manipulate slice_senslab table in
+ slab_sfa database.
+
+ """
+ __tablename__ = 'slab_xp'
+ slice_hrn = Column(String)
+ job_id = Column(Integer, primary_key = True)
+ end_time = Column(Integer, nullable = False)
-class SlabSliceDB (SlabBase):
- __tablename__ = 'slice_senslab'
- record_id_user = Column(Integer, primary_key=True)
- oar_job_id = Column( Integer,default = -1)
- record_id_slice = Column(Integer)
- slice_hrn = Column(String,nullable = False)
+ #oar_job_id = Column( Integer,default = -1)
+ #node_list = Column(postgresql.ARRAY(String), nullable =True)
- def __init__ (self, slice_hrn =None, oar_job_id=None, record_id_slice=None, record_id_user= None):
- if record_id_slice:
- self.record_id_slice = record_id_slice
+ def __init__ (self, slice_hrn =None, job_id=None, end_time=None):
+ """
+ Defines a row of the slice_senslab table
+ """
if slice_hrn:
self.slice_hrn = slice_hrn
- if oar_job_id:
- self.oar_job_id = oar_job_id
- if slice_hrn:
- self.slice_hrn = slice_hrn
- if record_id_user:
- self.record_id_user= record_id_user
+ if job_id :
+ self.job_id = job_id
+ if end_time:
+ self.end_time = end_time
+
def __repr__(self):
- result="<Record id user =%s, slice hrn=%s, oar_job id=%s,Record id slice =%s" % \
- (self.record_id_user, self.slice_hrn, self.oar_job_id, self.record_id_slice)
+ """Prints the SQLAlchemy record to the format defined
+ by the function.
+ """
+ result = "<slab_xp : slice_hrn = %s , job_id %s end_time = %s" \
+ %(self.slice_hrn, self.job_id, self.end_time)
result += ">"
return result
-
-
+
class SlabDB:
- def __init__(self,config):
+ """ SQL Alchemy connection class.
+ From alchemy.py
+ """
+ def __init__(self, config, debug = False):
self.sl_base = SlabBase
+ dbname = "slab_sfa"
+ if debug == True :
+ l_echo_pool = True
+ l_echo = True
+ else :
+ l_echo_pool = False
+ l_echo = False
- dbname="slab_sfa"
- # will be created lazily on-demand
self.slab_session = None
# the former PostgreSQL.py used the psycopg2 directly and was doing
#self.connection.set_client_encoding("UNICODE")
- # it's unclear how to achieve this in sqlalchemy, nor if it's needed at all
+ # it's unclear how to achieve this in sqlalchemy, nor if it's needed
+ # at all
# http://www.sqlalchemy.org/docs/dialects/postgresql.html#unicode
# 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_url = "postgresql+psycopg2://%s:%s@:%s/%s"%\
- (config.SFA_DB_USER,config.SFA_DB_PASSWORD,config.SFA_DB_PORT,dbname)
- print >>sys.stderr, " \r\n \r\n SLAPOSTGRES INIT unix_url %s" %(unix_url)
+ 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_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)
+ 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 url in [ unix_url, tcp_url ] :
try:
- self.slab_engine = create_engine (url,echo_pool=True,echo=True)
+ self.slab_engine = create_engine (url, echo_pool = \
+ l_echo_pool, echo = l_echo)
self.check()
- self.url=url
+ self.url = url
return
except:
pass
- self.slab_engine=None
- raise Exception,"Could not connect to database"
-
+ self.slab_engine = None
+ raise Exception, "Could not connect to database"
+
+
+
def check (self):
+ """ Cehck if a table exists by trying a selection
+ on the table.
+
+ """
self.slab_engine.execute ("select 1").scalar()
-
-
+
+
def session (self):
+ """
+ Creates a SQLalchemy session. Once the session object is created
+ it should be used throughout the code for all the operations on
+ tables for this given database.
+
+ """
if self.slab_session is None:
- Session=sessionmaker ()
- self.slab_session=Session(bind=self.slab_engine)
+ Session = sessionmaker()
+ self.slab_session = Session(bind = self.slab_engine)
return self.slab_session
+ def close_session(self):
+ """
+ Closes connection to database.
-
-
- #Close connection to database
- def close(self):
- if self.connection is not None:
- self.connection.close()
- self.connection = None
-
-
-
+ """
+ if self.slab_session is None: return
+ self.slab_session.close()
+ self.slab_session = None
+
def exists(self, tablename):
"""
Checks if the table specified as tablename exists.
try:
metadata = MetaData (bind=self.slab_engine)
- table=Table (tablename, metadata, autoload=True)
-
+ table = Table (tablename, metadata, autoload=True)
return True
+
except NoSuchTableError:
- print>>sys.stderr, " \r\n \r\n \t SLABPOSTGRES EXISTS NOPE! tablename %s " %(tablename)
+ logger.log_exc("SLABPOSTGRES tablename %s does not exists" \
+ %(tablename))
return False
- def createtable(self, tablename ):
+ def createtable(self):
"""
- Creates the specifed table. Uses the global dictionnary holding the tablenames and
- the table schema.
+ Creates all the table sof the engine.
+ Uses the global dictionnary holding the tablenames and the table schema.
"""
- print>>sys.stderr, " \r\n \r\n \t SLABPOSTGRES createtable SlabBase.metadata.sorted_tables %s \r\n engine %s" %(SlabBase.metadata.sorted_tables , slab_engine)
+ logger.debug("SLABPOSTGRES createtable SlabBase.metadata.sorted_tables \
+ %s \r\n engine %s" %(SlabBase.metadata.sorted_tables , slab_engine))
SlabBase.metadata.create_all(slab_engine)
return
- def find (self, name = None, filter_dict = None):
- if filter_dict:
- filter_statement = "and_(SlabSliceDB."
- for k in filter_dict:
- filter_statement += str(k)+ "==" + str(filter_dict[l])
- filter_statement +=')'
- print>>sys.stderr, " \r\n \r\n \t SLABPOSTGRES find filter_statement %s"%(filter_statement)
- slab_dbsession.query(SlabSliceDB).filter(filter_statement)
-
-
-
-
-from sfa.util.config import Config
-slab_alchemy= SlabDB(Config())
-slab_engine=slab_alchemy.slab_engine
-slab_dbsession=slab_alchemy.session()
\ No newline at end of file
+slab_alchemy = SlabDB(Config())
+slab_engine = slab_alchemy.slab_engine
+slab_dbsession = slab_alchemy.session()
git://git.onelab.eu / sfa.git / blobdiff