straightforward to create the new file now

        this is meant to make the file before we add triples, so we

        wouldn't see the blank file and lose those triples. But it

        didn't work, so there are other measures that make us not lose

        the triples from a new file. Calling this before patching the

        graph is still a reasonable thing to do, though.

        """

        g = self.getSubgraph(ctx)

        if ctx not in self.graphFiles:

            outFile = fileForUri(self.dirUriMap, ctx)

            log.info("starting new file %r", outFile)

            self.graphFiles[ctx] = GraphFile(self.notifier, outFile, ctx,

                                             self.patch, self.getSubgraph)

    def dirtyFiles(self, ctxs):

        """mark dirty the files that we watch in these contexts.

        the ctx might not be a file that we already read; it might be

        for a new file we have to create, or it might be for a

        transient context that we're not going to save

        if it's a ctx with no file, error

if __name__ == "__main__":

    logging.basicConfig()

    log = logging.getLogger()

    parser = optparse.OptionParser()

    parser.add_option("-v", "--verbose", action="store_true",

                      help="logging.DEBUG")

    (options, args) = parser.parse_args()

    log.setLevel(logging.DEBUG if options.verbose else logging.INFO)

    db = Db(dirUriMap={os.environ['LIGHT9_SHOW'].rstrip('/') + '/':

    from twisted.python import log as twlog

    twlog.startLogging(sys.stdout)

    reactor.listenTCP(networking.rdfdb.port, cyclone.web.Application(handlers=[

        (r'/live', Live),

        (r'/graph', GraphResource),

        (r'/patches', Patches),

        (r'/graphClients', GraphClients),

        (r'/(.*)', NoExts,

         {"path" : "light9/rdfdb/web",