CRAB/python/DLSInfo.py

#!/usr/bin/env python
import sys, os, commands,string, re
import exceptions
from crab_exceptions import *
from crab_util import *
import common

try:
    import dlsApi
    import dlsClient
    from dlsDataObjects import DlsLocation, DlsFileBlock, DlsEntry
except:
    try:
        Crabpydir=commands.getoutput('which crab')
        Topdir=string.replace(Crabpydir,'/python/crab','')
        sys.path.append(Topdir+'/DLSAPI')
        import dlsApi
        import dlsClient
        from dlsDataObjects import DlsLocation, DlsFileBlock, DlsEntry
    except:
        msg="ERROR no DLS API available"
        raise CrabException(msg)
                                                                                            
## for python 2.2 add the pyexpat.so to PYTHONPATH
pythonV=sys.version.split(' ')[0]
if pythonV.find('2.2') >= 0 :
 Crabpydir=commands.getoutput('which crab')
 Topdir=string.replace(Crabpydir,'/python/crab','')
 extradir=Topdir+'/DLSAPI/extra'
 if sys.path.count(extradir) <= 0:
   if os.path.exists(extradir):
    sys.path.insert(0, extradir)


class DLSError:
    def __init__(self, fileblocks):
        print '\nERROR accessing DLS for fileblock '+fileblocks+'\n'
        pass


class DLSNoReplicas(exceptions.Exception):
    def __init__(self, FileBlock):
        args ="No replicas exists for fileblock: "+FileBlock+"\n"
        exceptions.Exception.__init__(self, args)
        pass

    def getClassName(self):
        """ Return class name. """
        return "%s" % (self.__class__.__name__)

    def getErrorMessage(self):
        """ Return exception error. """
        return "%s" % (self.args)


##############################################################################
# Class to extract info from DLS 
##############################################################################

class DLSInfo:
    def __init__(self, type):
        if type=="DLS_TYPE_DLI":
           endpoint="lfc-cms-test.cern.ch/grid/cms/DLS/LFCProto"
           try:
             import xml.dom.ext.reader
           except:
             crabdir=os.getenv('CRABDIR')
## Let the user set up PyXML by hand
             msg="There is no setup of PyXML python module required by DLS (DLI). Do the following:\n"
             msg+=" - check that in  %s/configure  the function configureDLSAPI is not commented \n"%crabdir
             msg+=" - uncomment it and re-run the configuration :"
             msg+="\n    cd %s\n"%crabdir
             msg+="     ./configure\n"
             msg+="     source crab.(c)sh\n"
             raise CrabException(msg)

        elif type=="DLS_TYPE_MYSQL":
           endpoint="lxgate10.cern.ch:18081"
        else:
           msg = "DLS type %s not among the supported DLS ( DLS_TYPE_DLI and DLS_TYPE_MYSQL ) "%type
           raise CrabException(msg)

        try:
          self.api = dlsClient.getDlsApi(dls_type=type,dls_endpoint=endpoint)
        except dlsApi.DlsApiError, inst:
          msg = "Error when binding the DLS interface: %s  Server %s"%(str(inst),self.DLSServer_)
          #print msg
          raise CrabException(msg)

# ####################################
    def getReplicas(self,fileblocks):
        """
        query DLS to get replicas
        """
        ##
        try:
          entryList=self.api.getLocations([fileblocks])
        except dlsApi.DlsApiError, inst:
          msg = "Error in the DLS query: %s." % str(inst)
          #print msg
          raise DLSNoReplicas(fileblocks)

        ListSites=[] 
        for entry in entryList:
         for loc in entry.locations:
           ListSites.append(str(loc.host))
        if len(ListSites)<=0:
          raise DLSNoReplicas(fileblocks)

        return ListSites         
Revision:	1.8
Committed:	Tue May 30 23:33:58 2006 UTC (18 years, 11 months ago) by afanfani
Content type:	text/x-python
Branch:	MAIN
Changes since 1.7:	+6 -3 lines
Log Message:	change the error message if no PyXMl stup is found
#	User	Rev	Content
1	afanfani	1.1	#!/usr/bin/env python
2			import sys, os, commands,string, re
3	afanfani	1.4	import exceptions
4			from crab_exceptions import *
5	afanfani	1.1	from crab_util import *
6			import common
7
8	afanfani	1.7	try:
9			import dlsApi
10			import dlsClient
11			from dlsDataObjects import DlsLocation, DlsFileBlock, DlsEntry
12			except:
13			try:
14			Crabpydir=commands.getoutput('which crab')
15			Topdir=string.replace(Crabpydir,'/python/crab','')
16			sys.path.append(Topdir+'/DLSAPI')
17			import dlsApi
18			import dlsClient
19			from dlsDataObjects import DlsLocation, DlsFileBlock, DlsEntry
20			except:
21			msg="ERROR no DLS API available"
22			raise CrabException(msg)
23
24			## for python 2.2 add the pyexpat.so to PYTHONPATH
25			pythonV=sys.version.split(' ')[0]
26			if pythonV.find('2.2') >= 0 :
27			Crabpydir=commands.getoutput('which crab')
28			Topdir=string.replace(Crabpydir,'/python/crab','')
29			extradir=Topdir+'/DLSAPI/extra'
30			if sys.path.count(extradir) <= 0:
31			if os.path.exists(extradir):
32			sys.path.insert(0, extradir)
33	afanfani	1.6
34
35	afanfani	1.1	class DLSError:
36	slacapra	1.5	def __init__(self, fileblocks):
37			print '\nERROR accessing DLS for fileblock '+fileblocks+'\n'
38			pass
39	afanfani	1.1
40	afanfani	1.4
41			class DLSNoReplicas(exceptions.Exception):
42	slacapra	1.5	def __init__(self, FileBlock):
43			args ="No replicas exists for fileblock: "+FileBlock+"\n"
44			exceptions.Exception.__init__(self, args)
45			pass
46
47			def getClassName(self):
48			""" Return class name. """
49			return "%s" % (self.__class__.__name__)
50
51			def getErrorMessage(self):
52			""" Return exception error. """
53			return "%s" % (self.args)
54	afanfani	1.4
55	afanfani	1.6
56	afanfani	1.1	##############################################################################
57			# Class to extract info from DLS
58			##############################################################################
59
60			class DLSInfo:
61	afanfani	1.6	def __init__(self, type):
62			if type=="DLS_TYPE_DLI":
63			endpoint="lfc-cms-test.cern.ch/grid/cms/DLS/LFCProto"
64			try:
65			import xml.dom.ext.reader
66			except:
67			crabdir=os.getenv('CRABDIR')
68			## Let the user set up PyXML by hand
69	afanfani	1.8	msg="There is no setup of PyXML python module required by DLS (DLI). Do the following:\n"
70			msg+=" - check that in %s/configure the function configureDLSAPI is not commented \n"%crabdir
71			msg+=" - uncomment it and re-run the configuration :"
72			msg+="\n cd %s\n"%crabdir
73			msg+=" ./configure\n"
74			msg+=" source crab.(c)sh\n"
75	afanfani	1.6	raise CrabException(msg)
76
77			elif type=="DLS_TYPE_MYSQL":
78			endpoint="lxgate10.cern.ch:18081"
79			else:
80			msg = "DLS type %s not among the supported DLS ( DLS_TYPE_DLI and DLS_TYPE_MYSQL ) "%type
81			raise CrabException(msg)
82
83			try:
84			self.api = dlsClient.getDlsApi(dls_type=type,dls_endpoint=endpoint)
85			except dlsApi.DlsApiError, inst:
86			msg = "Error when binding the DLS interface: %s Server %s"%(str(inst),self.DLSServer_)
87			#print msg
88			raise CrabException(msg)
89	afanfani	1.1
90			# ####################################
91	afanfani	1.6	def getReplicas(self,fileblocks):
92	slacapra	1.5	"""
93			query DLS to get replicas
94			"""
95			##
96	afanfani	1.6	try:
97			entryList=self.api.getLocations([fileblocks])
98			except dlsApi.DlsApiError, inst:
99			msg = "Error in the DLS query: %s." % str(inst)
100			#print msg
101			raise DLSNoReplicas(fileblocks)
102
103			ListSites=[]
104			for entry in entryList:
105			for loc in entry.locations:
106			ListSites.append(str(loc.host))
107			if len(ListSites)<=0:
108			raise DLSNoReplicas(fileblocks)
109	afanfani	1.4
110	slacapra	1.5	return ListSites