base.py
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Created: Fri, Nov 8, 03:48

base.py
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	#!/usr/bin/env python

	from __future__ import print_function

	__all__ = [ "Base" ]

	import job
	import os
	import psycopg2
	import re
	import copy
	import numpy as np
	import psycopg2
	import bdparser
	import sys
	import getpass
	import datetime
	import run

	################################################################
	import bdlogging,logging
	print = bdlogging.invalidPrint
	logger = logging.getLogger(__name__)
	################################################################

	class Base(object):
	"""
	"""

	def getRunFromID(self,run_id):
	myrun = run.Run(self)
	myrun["id"] = run_id
	myrun.id = run_id
	run_list = myrun.getMatchedObjectList()
	if len(run_list) != 1:
	raise Exception('Unknown run {0}'.format(run_id))

	return run_list[0]

	def getJobFromID(self,job_id):
	myjob = job.Job(self)
	myjob["id"] = job_id
	myjob.id = job_id
	job_list = myjob.getMatchedObjectList()
	if len(job_list) != 1:
	raise Exception('Unknown run {0}'.format(job_id))

	return job_list[0]


	def createBase(self,job_desc,run_desc,quantities={},**kwargs):
	#logger.debug (quantities)
	self.createSchema(kwargs)
	self.createTable(job_desc)
	self.createTable(run_desc)
	self.createGenericTables()

	for qname,type in quantities.iteritems():
	self.pushQuantity(qname,type)


	if (self.truerun):
	self.commit()

	def getObject(self,sqlobject):
	curs = self.connection.cursor()
	curs.execute("SELECT * FROM {0}.{1} WHERE id = {2}".format(self.schema,sqlobject.table_name,sqlobject.id))

	col_info = self.getColumnProperties(sqlobject)
	line = curs.fetchone()
	for i in range(0,len(col_info)):
	col_name = col_info[i][0]
	sqlobject[col_name] = line[i]

	def createSchema(self, params = {"yes": False}):
	# create the schema of the simulation
	curs = self.connection.cursor()
	curs.execute("SELECT schema_name FROM information_schema.schemata WHERE schema_name = '{0}'".format(self.schema).lower())
	if (curs.rowcount):
	validated = bdparser.validate_question("Are you sure you want to drop the schema named '" + self.schema + "'", params, False)
	if (validated == True):
	curs.execute("DROP SCHEMA {0} cascade".format(self.schema))
	else:
	logger.debug ("creation canceled: exit program")
	sys.exit(-1)

	curs.execute("CREATE SCHEMA {0}".format(self.schema))

	def createTypeCodes(self):
	curs = self.connection.cursor()
	curs.execute("SELECT typname,oid from pg_type;")
	self.type_code = {}
	for i in curs:
	# logger.debug (i[0])
	if (i[0] == 'float8'):
	self.type_code[i[1]] = float
	if (i[0] == 'text'):
	self.type_code[i[1]] = str
	if (i[0] == 'int8'):
	self.type_code[i[1]] = int
	if (i[0] == 'int4'):
	self.type_code[i[1]] = int
	if (i[0] == 'bool'):
	self.type_code[i[1]] = bool
	if (i[0] == 'timestamp'):
	self.type_code[i[1]] = datetime.datetime


	def createTable(self, object):
	request = object.createTableRequest()
	curs = self.connection.cursor()
	# logger.debug (request)
	curs.execute(request)

	def createGenericTables(self,):
	sql_script_name = os.path.join(os.path.dirname(__file__),"build_tables.sql")
	curs = self.connection.cursor()
	# create generic tables
	query_list = list()
	with open(sql_script_name,"r") as fh:
	for line in fh:
	query_list.append(re.sub("SCHEMAS_IDENTIFIER",self.schema,line))

	curs.execute("\n".join(query_list))

	def getColumnProperties(self, sqlobject):
	curs = self.connection.cursor()
	curs.execute("SELECT * FROM {0}.{1} LIMIT 0".format(self.schema,sqlobject.table_name))
	column_names = [ desc[0] for desc in curs.description]
	column_type = [ desc[1] for desc in curs.description]
	return zip(column_names,column_type)

	def setObjectItemTypes(self, sqlobject):
	col_info = self.getColumnProperties(sqlobject)
	for i,j in col_info:
	sqlobject.types[i] = self.type_code[j]
	# logger.debug (str(i) + " " + str(self.type_code[j]))

	def insert(self, sqlobject):
	sqlobject.prepare()
	curs = self.performRequest(*(sqlobject.insert()))
	sqlobject.id = curs.fetchone()[0]

	def performRequest(self, request, params=[]):
	curs = self.connection.cursor()
	# logger.debug (request)
	# logger.debug (params)
	try:
	curs.execute(request,params)
	except psycopg2.ProgrammingError as err:
	raise psycopg2.ProgrammingError(
	("While trying to execute the query '{0}' with parameters " +
	"'{1}', I caught this: '{2}'").format(request, params, err))
	return curs

	def createParameterSpace(self,myjob,entry_nb=0,tmp_job=None,nb_inserted = 0):
	keys = myjob.entries.keys()
	nparam = len(keys)
	if (entry_nb == nparam):
	if (not tmp_job):
	logger.debug ("internal error")
	sys.exit(-1)
	if (len(tmp_job.getMatchedObjectList()) > 0):
	return nb_inserted
	nb_inserted += 1
	logger.info("insert job #{0}".format(nb_inserted) + ': ' + str(tmp_job.entries))
	self.insert(tmp_job)
	return nb_inserted



	if (not tmp_job):
	tmp_job = job.Job(self)

	key = keys[entry_nb]
	e = myjob[key]

	if (type(e) == list):
	for typ in e:
	tmp_job[key.lower()] = typ
	nb_inserted = self.createParameterSpace(myjob,entry_nb+1,tmp_job,nb_inserted)
	else:
	tmp_job[key.lower()] = e
	nb_inserted = self.createParameterSpace(myjob,entry_nb+1,tmp_job,nb_inserted)

	if (self.truerun): self.commit()
	return nb_inserted


	def pushQuantity(self,name, type_code, description=None):
	""" implemented type_codes: "int" "float" "int.vector" "float.vector"
	"""

	if ((type_code == "int") or (type_code == int)):
	is_integer = True
	is_vector = False
	elif (type_code == "int.vector"):
	is_integer = True
	is_vector = True
	elif ((type_code == "float") or (type_code == float)):
	is_integer = False
	is_vector = False
	elif (type_code == "float.vector"):
	is_integer = False
	is_vector = True
	else:
	raise Exception("invalid type '{0}' for a quantity".format(type_code))

	curs = self.connection.cursor()
	curs.execute("INSERT INTO {0}.quantities (name,is_integer,is_vector,description) VALUES (%s , %s , %s, %s) RETURNING id".format(self.schema),(name,is_integer,is_vector,description) )
	item = curs.fetchone()
	if (item is None):
	raise Exception("Counld not create quantity \"" + name + "\"")
	return item[0]



	def commit(self):
	logger.debug("commiting changes to base")
	self.connection.commit()

	def getSchemaList(self):
	curs = self.connection.cursor()
	curs.execute("SELECT distinct(table_schema) from information_schema.tables where table_name='runs'")
	schemas = [ desc[0] for desc in curs]
	return schemas

	def checkStudy(self,dico):
	if not "study" in dico:
	logger.debug (""30)
	logger.debug ("Parameter 'study' must be provided at command line")
	logger.debug ("possibilities are:")
	schemas = self.getSchemaList()
	for s in schemas:
	logger.debug ("\t" + s)
	logger.debug ("")
	logger.debug ("FATAL => ABORT")
	logger.debug (""30)
	sys.exit(-1)


	def close(self):
	if 'connection' in self.__dict__:
	logger.debug ('closing database session' )
	self.connection.close()
	del (self.__dict__['connection'])

	def __del__(self):
	self.close()

	def __init__ (self, truerun=False,**kwargs):
	psycopg2_params = ["host","user","port","password"]
	connection_params = bdparser.filterParams(psycopg2_params,kwargs)
	if "password" in connection_params and connection_params["password"] == 'ask':
	connection_params["password"] = getpass.getpass()
	logger.debug('connection arguments: {0}'.format(connection_params))
	try:
	self.connection = psycopg2.connect(**connection_params)
	logger.debug('connected to base')
	except Exception as e:
	logger.error("Connection failed: check your connection settings:\n" + str(e))
	sys.exit(-1)
	assert(isinstance(self.connection,psycopg2._psycopg.connection))

	self.dbhost = kwargs["host"] if "host" in kwargs.keys() else "localhost"

	if ("should_not_check_study" not in kwargs):
	self.checkStudy(kwargs)
	self.schema = kwargs["study"]

	self.createTypeCodes()
	self.truerun = truerun

	if("list_parameters" in kwargs and kwargs["list_parameters"] == True):
	myjob = job.Job(self)
	myjob.prepare()
	message = ""
	message += ("****************************************************************\n")
	message += ("Job parameters:\n")
	message += ("****************************************************************\n")
	params = [str(j[0]) + ": " + str(j[1]) for j in myjob.types.iteritems() ]
	message += ("\n".join(params)+"\n")

	myrun = run.Run(self)
	myrun.prepare()
	message += ("****************************************************************\n")
	message += ("Run parameters:\n")
	message += ("****************************************************************\n")
	params = [str(j[0]) + ": " + str(j[1]) for j in myrun.types.iteritems() ]
	message += ("\n".join(params))

	logger.info("\n{0}".format(message))
	sys.exit(0)

	################################################################

	if __name__ == "__main__":
	connection = psycopg2.connect(host = "localhost")
	job_description = job.Job(dict(hono=int,lulu=float,toto=str))
	base = Base("honoluluSchema",connection,job_description)
	base.create()
	connection.commit()
	base.pushJob(dict(hono=12,lulu=24.2,toto="toto"))
	base.pushQuantity("ekin", "float")
	connection.commit()

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