confdbOfflineConverter.OfflineConverter Class Reference

Public Member Functions
def	__init__
def	query

Static Public Member Functions
def	CheckTempDirectory

Public Attributes
	baseDir
	baseUrl
	connect
	jars
	javaCmd
	verbose
	version
	workDir

Static Public Attributes
dictionary	databases = {}

Detailed Description

Definition at line 10 of file confdbOfflineConverter.py.

Constructor & Destructor Documentation

def confdbOfflineConverter.OfflineConverter.__init__	(		self,
			version = 'v1',
			database = 'hltdev',
			url = None,
			verbose = False
	)

Definition at line 52 of file confdbOfflineConverter.py.

    def __init__(self, version = 'v1', database = 'hltdev', url = None, verbose = False):
        self.verbose = verbose
        self.version = version
        self.baseDir = '/afs/cern.ch/user/c/confdb/www/%s/lib' % version
        self.baseUrl = 'http://confdb.web.cern.ch/confdb/%s/lib' % version
        self.jars    = ( 'ojdbc6.jar', 'cmssw-evf-confdb-converter.jar' )
        self.workDir = ''

        # check the schema version
        if version not in self.databases:
            # unsupported database version
            sys.stderr.write( "ERROR: unsupported database version \"%s\"\n" % version)

        # check the database
        if database in self.databases[version]:
            # load the connection parameters for the given database
            self.connect = self.databases[version][database]
        else:
            # unsupported database
            sys.stderr.write( "ERROR: unknown database \"%s\" for version \"%s\"\n" % (database, version))
            sys.exit(1)

        # check for a custom base URL
        if url is not None:
            self.baseUrl = url

        # try to read the .jar files from AFS, or download them
        if os.path.isdir(self.baseDir) and all(os.path.isfile(self.baseDir + '/' + jar) for jar in self.jars):
            # read the .jar fles from AFS
            self.workDir = self.baseDir
        else:
            # try to use $CMSSW_BASE/tmp
            self.workDir = OfflineConverter.CheckTempDirectory(os.environ['CMSSW_BASE'] + '/tmp/confdb')
            if not self.workDir:
                # try to use $TMP
                self.workDir = OfflineConverter.CheckTempDirectory(os.environ['TMP'] + '/confdb')
            if not self.workDir:
                # create a new temporary directory, and install a cleanup callback
                self.workDir = tempfile.mkdtemp()
                atexit.register(shutil.rmtree, self.workDir)
            # download the .jar files
            for jar in self.jars:
                # check if the file is already present
                if os.path.exists(self.workDir + '/' + jar):
                    continue
                # download to a temporay name and use an atomic rename (in case an other istance is downloading the same file
                handle, temp = tempfile.mkstemp(dir = self.workDir, prefix = jar + '.')
                os.close(handle)
                urllib.urlretrieve(self.baseUrl + '/' + jar, temp)
                if not os.path.exists(self.workDir + '/' + jar):
                    os.rename(temp, self.workDir + '/' + jar)
                else:
                    os.unlink(temp)

        # setup the java command line and CLASSPATH
        if self.verbose:
            sys.stderr.write("workDir = %s\n" % self.workDir)
        # use non-blocking random number source /dev/urandom (instead of /dev/random), see:
        #   http://blockdump.blogspot.fr/2012/07/connection-problems-inbound-connection.html
        # deal with timezone region not found
        #   http://stackoverflow.com/questions/9156379/ora-01882-timezone-region-not-found
        # increase the thread stack size from the default of 1 MB to work around java.lang.StackOverflowError errors, see
        #   man java
        self.javaCmd = ( 'java', '-cp', ':'.join(self.workDir + '/' + jar for jar in self.jars), '-Djava.security.egd=file:///dev/urandom', '-Doracle.jdbc.timezoneAsRegion=false', '-Xss32M', 'confdb.converter.BrowserConverter' )