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#!/usr/bin/env python
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import sys, os, string, re
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import xml.sax
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import urllib
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import DBSXMLHandler
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class DBSError:
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def __init__(self, owner, dataset):
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print '\nERROR accessing DBS for Owner/Dataset: '+owner+'/'+dataset+'\n'
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pass
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class DBSInfoError:
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def __init__(self, url):
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print '\nERROR accessing DBS url : '+url+'\n'
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pass
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##################################################################################
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# Class to extract info from DBS
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###############################################################################
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class DBSInfo:
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def __init__(self, owner, dataset, dataTiers):
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self.owner = owner
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self.dataset = dataset
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self.dataTiers = dataTiers
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## DBSXMLDump
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self.DBSclient_ = '/phedex/SL/PHEDEX_head/Utilities/DBSXMLDump -from DBS '
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self.DBSParam_ = '~/.globus/DBS_DBParam:Production/Admin'
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self.DBSDumpbase_ = self.DBSclient_+" -from DBS -db "+self.DBSParam_
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## HTTP/CGI
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self.DBSURL_='http://cern.ch/cms-dbs/cgi-bin/dbsxml?api='
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# ####################################
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def getDatasetProvenance(self):
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"""
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query DBS to get provenance
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"""
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## DBSXMLDump
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xmlfile= 'parent.xml'
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ListdataTiers=string.join(self.dataTiers,',')
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#print ListdataTiers
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print "DBSInfo: ---> getDatasetProvenance : "+self.owner+"/"+self.dataset+" with datatier "+ListdataTiers
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cmd = self.DBSDumpbase_+" -to "+xmlfile+" -datatier "+ListdataTiers+" -getDatasetProvenance \'"+self.owner+"/"+self.dataset+"\'"
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#print "DBSInfo: executing "+cmd
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os.system(cmd)
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### parse the XML
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handler = self.XMLparsing(xmlfile)
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os.system('rm '+xmlfile)
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print "DBSInfo: parents are %s"%handler.parentsList
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for aparent in handler.parent.keys():
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print "DBSInfo: parent is "+aparent+" type: "+handler.parent[aparent]
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## return a map with parent path and type : should I return just a list with parent paths?
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return handler.parent
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# ####################################
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def getDatasetContents(self):
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"""
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query DBS to get event collections
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"""
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print "DBSInfo: ---> getDatasetContents : "+self.dataset+"/"+self.owner
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try:
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url=self.DBSURL_+'getDatasetContents&path='+self.dataset+'/datatier/'+self.owner
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f = urllib.urlopen(url)
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except:
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raise DBSInfoError(url)
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data = f.read()
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xmlfile = "evc.xml"
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file = open(xmlfile, 'w')
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file.write(data)
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file.close()
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### parse the XML
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handler = self.XMLparsing(xmlfile)
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os.system('rm '+xmlfile)
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## get the fileblock and event collections
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nevtsbyblock= {}
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print "DBSInfo: fileblocks are: %s"%handler.fileblocksList
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for block in handler.fileblocksList:
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print "DBSInfo: --- block: "+block
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## get the event collections for each block
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evcnames=handler.evcbyfileblock[block].keys()
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evcnames.sort()
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nevts=0
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for evcname in evcnames:
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print "DBSInfo: evc: "+evcname+" nevts: "+handler.evcbyfileblock[block][evcname]
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nevts=nevts+int(handler.evcoll[evcname])
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print "DBSInfo: total nevts %i in block %s "%(nevts,block)
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nevtsbyblock[block]=nevts
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print "DBSInfo: total number of events %i"%handler.totnevts
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# returning a map of fileblock-nevts will be enough for now
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# TODO: in future the EvC collections grouped by fileblock should be returned
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return nevtsbyblock
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# ####################################
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def XMLparsing(self, xmlfile):
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"""
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parse XML
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"""
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#print "\n DBSInfo: Parsing XML file "+xmlfile+"\n"
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parser = xml.sax.make_parser()
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handler = DBSXMLHandler.Handler()
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parser.setContentHandler(handler)
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parser.parse(xmlfile)
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return handler
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