TestON/drivers/component.py

#!/usr/bin/env python
"""
Created on 24-Oct-2012
Copyright 2012 Open Networking Foundation (ONF)

Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
the System Testing Plans and Results wiki page at <https://wiki.onosproject.org/x/voMg>,
or the System Testing Guide page at <https://wiki.onosproject.org/x/WYQg>

    TestON is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    ( at your option ) any later version.

    TestON is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with TestON.  If not, see <http://www.gnu.org/licenses/>.
"""
import logging


class Component( object ):

    """
    This is the tempalte class for components
    """
    def __str__( self ):
        try:
            assert self.name
        except AttributeError:
            return repr( self )
        return str( self.name )

    def __init__( self ):
        self.default = ''
        self.name = ''
        self.wrapped = sys.modules[ __name__ ]
        self.count = 0
        self.prompt = "\$"

    def __getattr__( self, name ):
        """
         Called when an attribute lookup has not found the attribute
         in the usual places (i.e. it is not an instance attribute nor
         is it found in the class tree for self). name is the attribute
         name. This method should return the (computed) attribute value
         or raise an AttributeError exception.
        """
        try:
            return getattr( self.wrapped, name )
        except AttributeError as error:
            # NOTE: The first time we load a driver module we get this error
            if "'module' object has no attribute '__path__'" in error:
                pass
            else:
                raise error

    def checkOptions( self, var, defaultVar ):
        if var is None or var == "":
            return defaultVar
        return var

    def connect( self ):

        vars( main )[ self.name + 'log' ] = logging.getLogger( self.name )

        session_file = main.logdir + "/" + self.name + ".session"
        self.log_handler = logging.FileHandler( session_file )
        self.log_handler.setLevel( logging.DEBUG )

        vars( main )[ self.name + 'log' ].setLevel( logging.DEBUG )
        _formatter = logging.Formatter(
            "%(asctime)s  %(name)-10s: %(levelname)-8s: %(message)s" )
        self.log_handler.setFormatter( _formatter )
        vars( main )[ self.name + 'log' ].addHandler( self.log_handler )
        # Adding header for the component log
        vars( main )[ self.name + 'log' ].info( main.logHeader )
        # Opening the session log to append command's execution output
        self.logfile_handler = open( session_file, "a" )

        return "Dummy"

    def execute( self, cmd ):
        return main.TRUE
        # import commands
        # return commands.getoutput( cmd )

    def disconnect( self ):
        return main.TRUE

    def config( self ):
        self = self
        # Need to update the configuration code

    def cleanup( self ):
        return main.TRUE

    def log( self, message ):
        """
        Here finding the for the component to which the
        log message based on the called child object.
        """
        vars( main )[ self.name + 'log' ].info( "\n" + message + "\n" )

    def close_log_handles( self ):
        vars( main )[ self.name + 'log' ].removeHandler( self.log_handler )
        if self.logfile_handler:
            self.logfile_handler.close()

    def get_version( self ):
        return "Version unknown"

    def experimentRun( self, *args, **kwargs ):
        # FIXME handle *args
        args = utilities.parse_args( [ "RETURNS" ], **kwargs )
        return args[ "RETURNS" ]

if __name__ != "__main__":
    import sys
    sys.modules[ __name__ ] = Component()