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root/cvsroot/COMP/CRAB/python/PhEDExDatasvcInfo.py

Comparing COMP/CRAB/python/PhEDExDatasvcInfo.py (file contents):
Revision 1.2 by afanfani, Fri Jul 18 10:00:54 2008 UTC vs.
Revision 1.6 by afanfani, Wed Oct 1 18:28:28 2008 UTC

#	Line 1 | Line 1
1	<	#!/usr/bin/env python
2	<
1	>	from Actor import *
2		import urllib
3		from xml.dom.minidom import parse
4		from crab_exceptions import *
5	+	from crab_logger import Logger
6	+	from WorkSpace import *
7	+	from urlparse import urlparse
8	+	from LFNBaseName import *
9
10		class PhEDExDatasvcInfo:
11	<	"""
12	<	provides information from PhEDEx Data Service
13	<	"""
14	<	## PhEDEx Data Service URL
15	<	#datasvc_url="https://cmsweb.cern.ch/phedex/test/datasvc/xml/prod"
16	<	datasvc_url="https://cmsweb.cern.ch/phedex/datasvc/xml/prod"
11	>	def __init__( self , cfg_params ):
12	>
13	>	## PhEDEx Data Service URL
14	>	url="https://cmsweb.cern.ch/phedex/datasvc/xml/prod"
15	>	self.datasvc_url = cfg_params.get("USER.datasvc_url",url)
16	>
17	>	self.FacOps_savannah = 'https://savannah.cern.ch/support/?func=additem&group=cmscompinfrasup'
18	>
19	>
20	>	self.srm_version = cfg_params.get("USER.srm_version",'srmv2')
21	>	self.node = cfg_params.get('USER.storage_element',None)
22	>
23	>	self.publish_data = cfg_params.get("USER.publish_data",0)
24	>	self.usenamespace = cfg_params.get("USER.usenamespace",0)
25	>	self.user_remote_dir = cfg_params.get("USER.remote_dir",'')
26	>	self.datasetpath = cfg_params.get("CMSSW.datasetpath")
27	>	self.publish_data_name = cfg_params.get('USER.publish_data_name','')
28	>
29	>	self.user_lfn = cfg_params.get("USER.lfn",'')
30	>	self.user_se_path = cfg_params.get("USER.storage_path",'')
31	>
32	>	#check if using "private" Storage
33	>	self.usePhedex = True
34	>	if (self.node.find('T1_') + self.node.find('T2_')+self.node.find('T3_')) == -3: self.usePhedex = False
35	>	if not self.usePhedex and ( self.user_lfn == '' or self.user_se_path == '' ):
36	>	msg = 'You are asking to stage out without using CMS Storage Name convention. In this case you \n'
37	>	msg += '      must specify both lfn and storage_path in the crab.cfg section [USER].\n '
38	>	msg += '      For further information please visit: ADD_TWIKI_LINK'
39	>	raise CrabException(msg)
40	>	self.sched = common.scheduler.name().upper()
41	>	self.protocol = self.srm_version
42	>	if self.sched in ['CAF','LSF']:self.protocol = 'direct'
43	>
44	>	return
45	>
46	>	def getEndpoint(self):
47	>	'''
48	>	Return full SE endpoint and related infos
49	>	'''
50	>	self.lfn = self.getLFN()
51	>
52	>	#extract the PFN for the given node,LFN,protocol
53	>	endpoint = self.getStageoutPFN()
54
55	<	def lfn2pfn(self,node,lfn,protocol):
56	<	"""
57	<	PhEDEx Data Service lfn2pfn call
58	<
59	<	input:   LFN,node name,protocol
60	<	returns: DOM object with the content of the PhEDEx Data Service call
61	<	"""
62	<	params = {'node' : node , 'lfn': lfn , 'protocol': protocol}
63	<	params = urllib.urlencode(params)
64	<	#print params
65	<	datasvc_lfn2pfn="%s/lfn2pfn"%self.datasvc_url
66	<	urlresults = urllib.urlopen(datasvc_lfn2pfn, params)
67	<	try:
68	<	urlresults = parse(urlresults)
69	<	except:
70	<	urlresults = None
71	<	return urlresults
72	<
73	<	def parse_error(self,urlresults):
74	<	"""
75	<	look for errors in the DOM object returned by PhEDEx Data Service call
76	<	"""
77	<	errormsg = None
78	<	errors=urlresults.getElementsByTagName('error')
79	<	for error in errors:
80	<	errormsg=error.childNodes[0].data
81	<	if len(error.childNodes)>1:
82	<	errormsg+=error.childNodes[1].data
83	<	return errormsg
84	<
85	<	def parse_lfn2pfn(self,urlresults):
86	<	"""
87	<	Parse the content of the result of lfn2pfn PhEDEx Data Service  call
88	<
89	<	input:    DOM object with the content of the lfn2pfn call
90	<	returns:  PFN
91	<	"""
92	<	result = urlresults.getElementsByTagName('phedex')
93	<	if not result:
94	<	return []
95	<	result = result[0]
96	<	pfn = None
97	<	mapping = result.getElementsByTagName('mapping')
98	<	for m in mapping:
99	<	pfn=m.getAttribute("pfn")
100	<	if pfn:
101	<	return pfn
102	<
103	<	def getStageoutPFN(self,node,lfn,protocol):
104	<	"""
105	<	input:   LFN,node name,protocol
106	<	returns: PFN
107	<	"""
108	<	fullurl="%s/lfn2pfn?node=%s&lfn=%s&protocol=%s"%(self.datasvc_url,node,lfn,protocol)
109	<	domlfn2pfn = self.lfn2pfn(node,lfn,protocol)
110	<	if not domlfn2pfn :
111	<	msg="Unable to get info from %s"%fullurl
112	<	raise CrabException(msg)
113	<
114	<	errormsg = self.parse_error(domlfn2pfn)
115	<	if errormsg:
116	<	msg="Error extracting info from %s due to: %s"%(fullurl,errormsg)
117	<	raise CrabException(msg)
118	<
119	<	stageoutpfn = self.parse_lfn2pfn(domlfn2pfn)
120	<	if not stageoutpfn:
121	<	msg="Unable to get stageout path (PFN) from %s"%fullurl
122	<	raise CrabException(msg)
123	<	return stageoutpfn
124	<
125	<
126	<	if __name__ == '__main__' :
127	<	"""
128	<	"""
129	<	from crab_logger import Logger
90	<	from WorkSpace import *
91	<	continue_dir="/home/fanfani/CRAB"
92	<	cfg_params={'USER.logdir' : continue_dir }
93	<	common.work_space = WorkSpace(continue_dir, cfg_params)
94	<	log = Logger()
95	<	common.logger = log
96	<
97	<	from LFNBaseName import *
98	<	# test values
99	<	lfn = LFNBase("datasetstring")
100	<	node='T2_IT_Bari'
101	<	protocol="srmv2"
102	<
103	<	#create an instance of the PhEDExDatasvcInfo object
104	<	dsvc = PhEDExDatasvcInfo()
105	<	#extract the PFN for the given node,LFN,protocol
106	<	print "Stageout to %s"%dsvc.getStageoutPFN(node,lfn,protocol)
55	>	#extract SE name an SE_PATH (needed for publication)
56	>	SE, SE_PATH, User = self.splitEndpoint(endpoint)
57	>
58	>	return endpoint, self.lfn , SE, SE_PATH, User
59	>
60	>	def splitEndpoint(self, endpoint):
61	>	'''
62	>	Return relevant infos from endpoint
63	>	'''
64	>	SE = ''
65	>	SE_PATH = ''
66	>	USER = ''
67	>	if self.usePhedex:
68	>	if self.protocol == 'direct':
69	>	query=endpoint
70	>	SE_PATH = endpoint
71	>	else:
72	>	url = 'http://'+endpoint.split('://')[1]
73	>	# python > 2.4
74	>	# SE = urlparse(url).hostname
75	>	scheme, host, path, params, query, fragment = urlparse(url)
76	>	SE = host.split(':')[0]
77	>	SE_PATH = endpoint.split(host)[1]
78	>	USER = (query.split('user')[1]).split('/')[1]
79	>	else:
80	>	SE = self.node
81	>	SE_PATH = self.user_se_path + self.user_lfn
82	>	try:
83	>	USER = (self.lfn.split('user')[1]).split('/')[1]
84	>	except:
85	>	pass
86	>
87	>	return SE, SE_PATH, USER
88	>
89	>
90	>	def getLFN(self):
91	>	"""
92	>	define the LFN composing the needed pieces
93	>	"""
94	>	lfn = ''
95	>	l_User = False
96	>	if not self.usePhedex and (int(self.publish_data) == 0 and int(self.usenamespace) == 0) :
97	>	### add here check if user is trying to force a wrong LFN using a T2  TODO
98	>	## check if storage_name is a T2 (siteDB query)
99	>	## if yes :match self.user_lfn with LFNBaseName...
100	>	##     if NOT : raise (you are using a T2. It's not allowed stage out into self.user_path+self.user_lfn)
101	>	lfn = self.user_lfn
102	>	return lfn
103	>	if self.publish_data_name == '' and int(self.publish_data) == 1:
104	>	msg = "Eeror. The [USER] section does not have 'publish_data_name'"
105	>	raise CrabException(msg)
106	>	if self.publish_data_name == '' and int(self.usenamespace) == 1:
107	>	self.publish_data_name = "DefaultDataset"
108	>	if int(self.publish_data) == 1 or int(self.usenamespace) == 1:
109	>	if self.sched in ['CAF']: l_User=True
110	>	primaryDataset = self.computePrimaryDataset()
111	>	lfn = LFNBase(primaryDataset,self.publish_data_name,LocalUser=l_User)  + '/${PSETHASH}/'
112	>	else:
113	>	if self.sched in ['CAF','LSF']: l_User=True
114	>	lfn = LFNBase(self.user_remote_dir,LocalUser=l_User)
115	>	return lfn
116	>
117	>	def computePrimaryDataset(self):
118	>	"""
119	>	compute the last part for the LFN in case of publication
120	>	"""
121	>	if (self.datasetpath.upper() != 'NONE'):
122	>	primarydataset = self.datasetpath.split("/")[1]
123	>	else:
124	>	primarydataset = self.publish_data_name
125	>	return primarydataset
126	>
127	>	def lfn2pfn(self):
128	>	"""
129	>	PhEDEx Data Service lfn2pfn call
130
131	+	input:   LFN,node name,protocol
132	+	returns: DOM object with the content of the PhEDEx Data Service call
133	+	"""
134	+	params = {'node' : self.node , 'lfn': self.lfn , 'protocol': self.protocol}
135	+	params = urllib.urlencode(params)
136	+	datasvc_lfn2pfn="%s/lfn2pfn"%self.datasvc_url
137	+	urlresults = urllib.urlopen(datasvc_lfn2pfn, params)
138	+	try:
139	+	urlresults = parse(urlresults)
140	+	except:
141	+	urlresults = None
142	+
143	+	return urlresults
144	+
145	+	def parse_error(self,urlresults):
146	+	"""
147	+	look for errors in the DOM object returned by PhEDEx Data Service call
148	+	"""
149	+	errormsg = None
150	+	errors=urlresults.getElementsByTagName('error')
151	+	for error in errors:
152	+	errormsg=error.childNodes[0].data
153	+	if len(error.childNodes)>1:
154	+	errormsg+=error.childNodes[1].data
155	+	return errormsg
156	+
157	+	def parse_lfn2pfn(self,urlresults):
158	+	"""
159	+	Parse the content of the result of lfn2pfn PhEDEx Data Service  call
160	+
161	+	input:    DOM object with the content of the lfn2pfn call
162	+	returns:  PFN
163	+	"""
164	+	result = urlresults.getElementsByTagName('phedex')
165	+
166	+	if not result:
167	+	return []
168	+	result = result[0]
169	+	pfn = None
170	+	mapping = result.getElementsByTagName('mapping')
171	+	for m in mapping:
172	+	pfn=m.getAttribute("pfn")
173	+	if pfn:
174	+	return pfn
175	+
176	+	def getStageoutPFN( self ):
177	+	"""
178	+	input:   LFN,node name,protocol
179	+	returns: PFN
180	+	"""
181	+	if self.usePhedex:
182	+	fullurl="%s/lfn2pfn?node=%s&lfn=%s&protocol=%s"%(self.datasvc_url,self.node,self.lfn,self.protocol)
183	+	domlfn2pfn = self.lfn2pfn()
184	+	if not domlfn2pfn :
185	+	msg="Unable to get info from %s"%fullurl
186	+	raise CrabException(msg)
187	+
188	+	errormsg = self.parse_error(domlfn2pfn)
189	+	if errormsg:
190	+	msg="Error extracting info from %s due to: %s"%(fullurl,errormsg)
191	+	raise CrabException(msg)
192	+
193	+	stageoutpfn = self.parse_lfn2pfn(domlfn2pfn)
194	+	if not stageoutpfn:
195	+	msg ='Unable to get stageout path from TFC at Site %s \n'%self.node
196	+	msg+='      Please alert the CompInfraSup group through their savannah %s \n'%self.FacOps_savannah
197	+	msg+='      reporting: \n'
198	+	msg+='       Summary: Unable to get user stageout from TFC at Site %s \n'%self.node
199	+	msg+='       OriginalSubmission: stageout path is not retrieved from %s \n'%fullurl
200	+	raise CrabException(msg)
201	+	else:
202	+	stageoutpfn = 'srm://'+self.node+':8443'+self.user_se_path+self.lfn
203	+
204	+	return stageoutpfn
205	+
206	+
207	+
208	+	if __name__ == '__main__':
209	+	"""
210	+	Sort of unit testing to check Phedex API for whatever site and/or lfn.
211	+	Usage:
212	+	python PhEDExDatasvcInfo.py --node T2_IT_Bari --lfn /store/maremma
213	+
214	+	"""
215	+	import getopt,sys
216	+	from crab_util import *
217	+	import common
218	+	klass_name = 'SchedulerGlite'
219	+	klass = importName(klass_name, klass_name)
220	+	common.scheduler = klass()
221	+
222	+	lfn="/store/user/"
223	+	node='T2_IT_Bari'
224	+	valid = ['node=','lfn=']
225	+	try:
226	+	opts, args = getopt.getopt(sys.argv[1:], "", valid)
227	+	except getopt.GetoptError, ex:
228	+	print str(ex)
229	+	sys.exit(1)
230	+	for o, a in opts:
231	+	if o == "--node":
232	+	node = a
233	+	if o == "--lfn":
234	+	lfn = a
235	+
236	+	mycfg_params = { 'USER.storage_element': node }
237	+	dsvc = PhEDExDatasvcInfo(mycfg_params)
238	+	dsvc.lfn = lfn
239	+	print dsvc.getStageoutPFN()
240	+

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