| ''' |
| Created on 01/10/2012 |
| @author: Amr Hassan |
| ''' |
| import psycopg2 |
| from psycopg2 import extras |
| import math |
| import string |
| import sys |
| import DBConnection |
| import logging |
| from io import BytesIO |
| import numpy |
| import struct |
|
|
| class DBInterface(object): |
| ''' |
| This class will handle the interface with the DB |
| ''' |
| FormatMapping={'int':'INT', |
| 'float':'FLOAT', |
| 'long long':'BIGINT' |
| } |
| |
| |
| |
| |
| |
| def __init__(self,CurrentSAGEStruct,Options,CommRank): |
| ''' |
| Constructor |
| ''' |
| self.Options=Options |
| self.CurrentSAGEStruct=CurrentSAGEStruct |
| self.DBConnection=DBConnection.DBConnection(Options) |
| |
| |
| |
| |
| def CloseConnections(self): |
| self.DBConnection.CloseConnections() |
| |
| |
| |
| |
| |
| |
| def GetListofUnProcessedTrees(self,CommSize,CommRank): |
| return self.DBConnection.ExecuteQuerySQLStatment("SELECT * FROM TreeProcessingSummary where Processed=FALSE and mod(LoadingTreeID,"+str(CommSize)+")="+str(CommRank)+" order by LoadingTreeID;") |
| |
| def SetTreeAsProcessed(self,TreeID): |
| self.DBConnection.ExecuteNoQuerySQLStatment("UPDATE TreeProcessingSummary set Processed=TRUE where LoadingTreeID= "+str(TreeID)) |
| |
| |
| |
| |
| |
| |
| def CreateNewTree(self,TableID,TreeData): |
| |
| |
| try: |
| cpyData = BytesIO() |
| TablePrefix=self.Options['PGDB:TreeTablePrefix'] |
| NewTableName=TablePrefix+str(TableID) |
| HostIndex=self.DBConnection.MapTableIDToServerIndex(TableID) |
| |
| |
| cpyData.write(struct.pack('!11sii', b'PGCOPY\n\377\r\n\0', 0, 0)) |
| cpyData.write(TreeData.tostring()) |
| cpyData.write(struct.pack('!h', -1)) |
| logging.info("Start Copying Data....") |
| cpyData.seek(0) |
| self.DBConnection.ActiveCursors[HostIndex].copy_expert('COPY '+NewTableName+' FROM STDIN WITH BINARY', cpyData) |
| logging.info("Adding "+str(len(TreeData))+" Galaxies to Table"+str(TableID)) |
| except Exception as Exp: |
| logging.info(">>>>>Error While Processing Tree") |
| logging.info(type(Exp)) |
| logging.info(Exp.args) |
| logging.info(Exp) |
| raw_input("PLease press enter to continue.....") |
| |
| |
| |
| |
| |
