python.CaloCondTools.CaloBlobReader Class Reference

Inheritance diagram for python.CaloCondTools.CaloBlobReader:

Collaboration diagram for python.CaloCondTools.CaloBlobReader:

Public Member Functions
def	__init__ (self, db, folder, tag="")
def	getCells (self, systemId, pointInTime)
def	folderIsMultiVersion (self)

Private Attributes
	__db
	__folder
	__folderType
	__tag
	__objDict

Detailed Description

CaloBlobReader is a helper class, managing the details of COOL interactions

Definition at line 271 of file CaloCondTools.py.

Constructor & Destructor Documentation

__init__()

def python.CaloCondTools.CaloBlobReader.__init__	(		self,
			db,
			folder,
			tag = ""
	)

Input:
- db    : db should be an open database connection 
- folder: full folder path
- tag   : The folder tag, e.g. \"000-00\"

Definition at line 277 of file CaloCondTools.py.

    def __init__(self, db, folder, tag=""):
        """
        Input:
        - db    : db should be an open database connection 
        - folder: full folder path
        - tag   : The folder tag, e.g. \"000-00\"
        """
        #=== initialize base class
        CaloCondLogger.__init__(self,"CaloBlobReader")
 
        #=== try to open db
        try:
            self.__db  = db
            self.__folder = self.__db.getFolder(folder)
        except Exception as e:
            self.log().critical( e )
            raise
 
        #=== determine if "run-lumi" or "time" folder
        validFolderTypes = ("run-lumi","time")
        folderDescr = self.__folder.description()
        self.__folderType = getAthenaFolderType(folderDescr)
        if self.__folderType not in validFolderTypes:
            raise Exception("Invalid folder type found: \'%s\'" % self.__folderType)
 
        #=== use camelized full folder path only if tag is given
        self.__tag = tag
 
        #=== initialize dictionary to keep reference to DB object
        #=== and timestamp, so they do not go out of scope
        self.__objDict = {}
 

Member Function Documentation

folderIsMultiVersion()

def python.CaloCondTools.CaloBlobReader.folderIsMultiVersion

(

self

)

Returns true if MultiVersion folder is connected

Definition at line 343 of file CaloCondTools.py.

    def folderIsMultiVersion(self):
        """
        Returns true if MultiVersion folder is connected
        """
        if self.__folder.versioningMode()==cool.FolderVersioning.MULTI_VERSION:
            return True
        else:
            return False
 
 
#======================================================================
#===
#=== CaloBlobWriter 
#===
#======================================================================
 
#
#______________________________________________________________________

getCells()

def python.CaloCondTools.CaloBlobReader.getCells	(		self,
			systemId,
			pointInTime
	)

Returns a CaloCondBlob object for the given system.

Definition at line 310 of file CaloCondTools.py.

    def getCells(self, systemId, pointInTime):
        """
        Returns a CaloCondBlob object for the given system.
        """
 
        validityKey = getCoolValidityKey(pointInTime)
        self.log().debug("Validity key is %s", validityKey)
        try:
            #=== Have we retrieved data previously?
            key = (systemId,validityKey)
            obj = self.__objDict.get(key)
            #=== ... if not, get it from DB
            if not obj:
                channelId = cool.ChannelId(systemId)
                obj = self.__folder.findObject(validityKey, channelId, self.__tag)
                self.log().debug("Fetching from DB: %s", obj)
                blob = obj.payload()[0]
                self.log().debug("blob size: %d", blob.size())
                #=== store object in dictionary
                self.__objDict[key] = obj
            #=== get blob
            blob = obj.payload()[0]
            self.log().debug("blob size: %d", blob.size())
 
            #=== create CaloCondBlob object
            flt = g.CaloCondBlobFlt.getInstance(blob)
            return flt
        except Exception as e:
            self.log().error("Fetching of systemId=%i failed with exception %s",systemId,e)
            return None
 
 

Member Data Documentation

__db

python.CaloCondTools.CaloBlobReader.__db

private

Definition at line 289 of file CaloCondTools.py.

__folder

python.CaloCondTools.CaloBlobReader.__folder

private

Definition at line 290 of file CaloCondTools.py.

__folderType

python.CaloCondTools.CaloBlobReader.__folderType

private

Definition at line 298 of file CaloCondTools.py.

__objDict

python.CaloCondTools.CaloBlobReader.__objDict

private

Definition at line 307 of file CaloCondTools.py.

__tag

python.CaloCondTools.CaloBlobReader.__tag

private

Definition at line 303 of file CaloCondTools.py.

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The documentation for this class was generated from the following file:

• CaloCondTools.py