def get_next_id(self):
        try:
            query = {'_id': 'last_id'}
            update = {'$inc': {'id': 1}}
            fn = self.db.internal.find_and_modify
            row = fn(query, update, upsert=True, new=True)
        except Exception as e:
            raise DatabaseException(e)
        return row['id']
def setup_dependent_run_environment(self, env, dependent_spec):
        """Location of the OpenFOAM project directory.
        This is identical to the WM_PROJECT_DIR value, but we avoid that
        variable since it would mask the normal OpenFOAM cleanup of
        previous versions.
        """
        env.set('FOAM_PROJECT_DIR', self.projectdir)