// Input Log file is the first parameter provided to the application
File input = new File(args[0]);

// The bigram which will construct the model
final Bigram<ApacheUserRequest> bigram = new Bigram<ApacheUserRequest>(
                UserRequesRRNKeyGenerator.getInstance());

// The session builder (Apache sessions in this case)
ApacheUserSessionBuilder builder = ApacheUserSessionBuilder.newInstance()
// Configure the log format to use 
                .logFormat(ApacheLogFormatPatternBuilder.COMBINED_LOG_FORMAT);

// Add session listener that will enrich the model (via bigram) using the session
builder.addListener(new UserSessionProcessor<ApacheUserSession>() {
        int i = 0;

        @Override
        public void process(ApacheUserSession session) {
                i++;
                System.err.println("" + i + " sessions processed");
                System.err.println(session);
                bigram.addTrace(session.iterator());
        }
});

// Include resources ending by '.php' or '/' or '.js'
builder.include(new UserRequestFilter<ApacheUserRequest>() {
        @Override
        public boolean filter(ApacheUserRequest request) {
                if (request == null) {
                        logger.error("Request is null!");
                        return false;
                }
                return request.getResource() != null
                                && (request.getResource().endsWith(".php")
                                                || request.getResource().endsWith("/") || request
                                                .getResource().endsWith(".js"));
        }
});

// Exclude localhost and jetpack requests
builder.exclude(new UserRequestFilter<ApacheUserRequest>() {
        @Override
        public boolean filter(ApacheUserRequest request) {
                if (request == null) {
                        logger.error("Request is null!");
                        return true;
                }
                return request.getClient() == null
                                || request.getClient().equals("localhost")
                                || request.getClient().equals("127.0.0.1")
                                || (request.getUserAgent() != null && request
                                                .getUserAgent()
                                                .equals("jetmon/1.0 (Jetpack Site Uptime Monitor by WordPress.com)"));
        }
});

// Launch the session building from the input file 
builder.buildSessions(new FileInputStream(input));

// Get the usage model from the Bigram
UsageModel model = bigram.getModel();