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from Actor import *
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import urllib
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from xml.dom.minidom import parse
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from crab_exceptions import *
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from crab_logger import Logger
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from WorkSpace import *
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from urlparse import urlparse
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from LFNBaseName import *
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class PhEDExDatasvcInfo:
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def __init__( self , cfg_params ):
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## PhEDEx Data Service URL
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url="https://cmsweb.cern.ch/phedex/datasvc/xml/prod"
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self.datasvc_url = cfg_params.get("USER.datasvc_url",url)
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self.FacOps_savannah = 'https://savannah.cern.ch/projects/cmscompinfrasup/'
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self.srm_version = cfg_params.get("USER.srm_version",'srmv2')
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self.node = cfg_params.get('USER.storage_element',None)
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self.publish_data = cfg_params.get("USER.publish_data",0)
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self.usenamespace = cfg_params.get("USER.usenamespace",0)
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self.user_remote_dir = cfg_params.get("USER.remote_dir",'')
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self.datasetpath = cfg_params.get("CMSSW.datasetpath")
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self.publish_data_name = cfg_params.get('USER.publish_data_name','')
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self.user_lfn = cfg_params.get("USER.lfn",'')
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self.user_se_path = cfg_params.get("USER.storage_path",'')
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#check if using "private" Storage
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self.usePhedex = True
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if (self.node.find('T1_') + self.node.find('T2_')) == -2: self.usePhedex = False
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if not self.usePhedex and ( self.user_lfn == '' or self.user_se_path == '' ):
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msg = 'You are asking to stage out without using CMS Storage Name convention. In this case you \n'
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msg += ' must specify both lfn and storage_path in the crab.cfg section [USER].\n '
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msg += ' For further information please visit: ADD_TWIKI_LINK'
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raise CrabException(msg)
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self.sched = common.scheduler.name().upper()
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self.protocol = self.srm_version
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if self.sched in ['CAF','LSF']:self.protocol = 'direct'
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return
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def getEndpoint(self):
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'''
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Return full SE endpoint and related infos
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'''
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self.lfn = self.getLFN()
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#extract the PFN for the given node,LFN,protocol
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endpoint = self.getStageoutPFN()
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#extract SE name an SE_PATH (needed for publication)
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SE, SE_PATH, User = self.splitEndpoint(endpoint)
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return endpoint, self.lfn , SE, SE_PATH, User
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def splitEndpoint(self, endpoint):
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'''
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Return relevant infos from endpoint
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'''
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SE = ''
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SE_PATH = ''
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USER = ''
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if self.usePhedex:
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if self.protocol == 'direct':
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query=endpoint
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SE_PATH = endpoint
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else:
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url = 'http://'+endpoint.split('://')[1]
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# python > 2.4
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# SE = urlparse(url).hostname
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scheme, host, path, params, query, fragment = urlparse(url)
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SE = host.split(':')[0]
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SE_PATH = endpoint.split(host)[1]
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USER = (query.split('user')[1]).split('/')[1]
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else:
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SE = self.node
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SE_PATH = self.user_se_path + self.user_lfn
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try:
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USER = (self.lfn.split('user')[1]).split('/')[1]
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except:
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pass
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return SE, SE_PATH, USER
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def getLFN(self):
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"""
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define the LFN composing the needed pieces
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"""
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lfn = ''
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l_User = False
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if not self.usePhedex and (int(self.publish_data) == 0 and int(self.usenamespace) == 0) :
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### add here check if user is trying to force a wrong LFN using a T2 TODO
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## check if storage_name is a T2 (siteDB query)
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## if yes :match self.user_lfn with LFNBaseName...
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## if NOT : raise (you are using a T2. It's not allowed stage out into self.user_path+self.user_lfn)
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lfn = self.user_lfn
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return lfn
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if self.publish_data_name == '' and int(self.publish_data) == 1:
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msg = "Eeror. The [USER] section does not have 'publish_data_name'"
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raise CrabException(msg)
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if self.publish_data_name == '' and int(self.usenamespace) == 1:
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self.publish_data_name = "DefaultDataset"
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if int(self.publish_data) == 1 or int(self.usenamespace) == 1:
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if self.sched in ['CAF']: l_User=True
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primaryDataset = self.computePrimaryDataset()
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lfn = LFNBase(primaryDataset,self.publish_data_name,LocalUser=l_User) + '/${PSETHASH}/'
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else:
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if self.sched in ['LSF']: l_User=True
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lfn = LFNBase(self.user_remote_dir,LocalUser=l_User)
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return lfn
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def computePrimaryDataset(self):
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"""
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compute the last part for the LFN in case of publication
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"""
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if (self.datasetpath.upper() != 'NONE'):
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primarydataset = self.datasetpath.split("/")[1]
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else:
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primarydataset = self.publish_data_name
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return primarydataset
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def lfn2pfn(self):
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"""
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PhEDEx Data Service lfn2pfn call
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input: LFN,node name,protocol
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returns: DOM object with the content of the PhEDEx Data Service call
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"""
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params = {'node' : self.node , 'lfn': self.lfn , 'protocol': self.protocol}
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params = urllib.urlencode(params)
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datasvc_lfn2pfn="%s/lfn2pfn"%self.datasvc_url
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urlresults = urllib.urlopen(datasvc_lfn2pfn, params)
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try:
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urlresults = parse(urlresults)
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except:
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urlresults = None
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return urlresults
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def parse_error(self,urlresults):
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"""
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look for errors in the DOM object returned by PhEDEx Data Service call
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"""
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errormsg = None
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errors=urlresults.getElementsByTagName('error')
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for error in errors:
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errormsg=error.childNodes[0].data
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if len(error.childNodes)>1:
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errormsg+=error.childNodes[1].data
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return errormsg
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def parse_lfn2pfn(self,urlresults):
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"""
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Parse the content of the result of lfn2pfn PhEDEx Data Service call
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input: DOM object with the content of the lfn2pfn call
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returns: PFN
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"""
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result = urlresults.getElementsByTagName('phedex')
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if not result:
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return []
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result = result[0]
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pfn = None
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mapping = result.getElementsByTagName('mapping')
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for m in mapping:
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pfn=m.getAttribute("pfn")
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if pfn:
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return pfn
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def getStageoutPFN( self ):
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"""
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input: LFN,node name,protocol
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returns: PFN
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"""
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if self.usePhedex:
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fullurl="%s/lfn2pfn?node=%s&lfn=%s&protocol=%s"%(self.datasvc_url,self.node,self.lfn,self.protocol)
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domlfn2pfn = self.lfn2pfn()
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if not domlfn2pfn :
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msg="Unable to get info from %s"%fullurl
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raise CrabException(msg)
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errormsg = self.parse_error(domlfn2pfn)
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if errormsg:
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msg="Error extracting info from %s due to: %s"%(fullurl,errormsg)
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raise CrabException(msg)
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stageoutpfn = self.parse_lfn2pfn(domlfn2pfn)
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if not stageoutpfn:
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msg ='Unable to get stageout path for Site %s. Maybe it does not correctly export its TFC. \n'%self.node
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msg+=' Please alert the FacOps group through their savannah %s'%self.FacOps_savannah
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raise CrabException(msg)
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else:
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stageoutpfn = 'srm://'+self.node+':8443'+self.user_se_path+self.lfn
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return stageoutpfn
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