@Override
public void handleDeployment(DeploymentInfo deploymentInfo, ServletContext servletContext) {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    try (InputStream handlers = classLoader.getResourceAsStream(META_INF_UNDERTOW_HANDLERS_CONF)) {
        if (handlers != null) {
            // From Stuart Douglas: Ideally these would be parsed at deployment time and passed into a recorder,
            // however they are likely not bytecode serialisable. Even though this approach
            // does not 100% align with the Quarkus ethos I think it is ok in this case as
            // the gains would be marginal compared to the cost of attempting to make
            // every predicate bytecode serialisable.
            List<PredicatedHandler> handlerList = PredicatedHandlersParser.parse(handlers, classLoader);
            if (!handlerList.isEmpty()) {
                deploymentInfo.addOuterHandlerChainWrapper(new RewriteCorrectingHandlerWrappers.PostWrapper());
                deploymentInfo.addOuterHandlerChainWrapper(new HandlerWrapper() {
                    @Override
                    public HttpHandler wrap(HttpHandler handler) {
                        return Handlers.predicates(handlerList, handler);
                    }
                });
                deploymentInfo.addOuterHandlerChainWrapper(new RewriteCorrectingHandlerWrappers.PreWrapper());
            }
        }
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

public static Predicate parse(String string, final ClassLoader classLoader) {
    return PredicatedHandlersParser.parsePredicate(string, classLoader);
}
 

public static final Predicate parse(String string, final ClassLoader classLoader) {
    return PredicatedHandlersParser.parsePredicate(string, classLoader);
}
 

static public void start() {
    // hosts and server configuration
    Map<String, Object> hostConfigMap = ServiceLocator.getInstance().getJsonMapConfig(ServiceLocator.HOST_CONFIG);
    Map<String, Object> serverConfigMap = ServiceLocator.getInstance().getJsonMapConfig(ServiceLocator.SERVER_CONFIG);

    OrientGraphFactory factory = ServiceLocator.getInstance().getFactory();
    // check if database exists, if not create it and init it.
    if(!factory.exists()) {
        try {
            OrientBaseGraph g = new OrientGraph(ServiceLocator.getInstance().getDbUrl());
            // database is auto created
            g.command(new OCommandSQL("alter database custom useLightweightEdges=true")).execute();
            g.command(new OCommandSQL("alter database DATETIMEFORMAT yyyy-MM-dd'T'HH:mm:ss.SSS")).execute();
            g.command(new OCommandSQL("alter database TIMEZONE UTC")).execute();
            OGlobalConfiguration.RID_BAG_EMBEDDED_TO_SBTREEBONSAI_THRESHOLD.setValue(-1);
        } finally {
            // this also closes the OrientGraph instances created by the factory
            // Note that OrientGraphFactory does not implement Closeable
            factory.close();
        }
        InitDatabase.initDb();
        // load rule compileCache here
        AbstractRuleRule.loadCompileCache();
        // replay all the event to create database image.
        // TODO need to rethink replay as orientdb is used instead of Memory Image.
        replayEvent();
    } else {
        // load rule compileCache here
        AbstractRuleRule.loadCompileCache();
    }

    NameVirtualHostHandler virtualHostHandler = new NameVirtualHostHandler();
    Iterator<String> it = hostConfigMap.keySet().iterator();
    while (it.hasNext()) {
        String host = it.next();
        Map<String, String> hostPropMap = (Map<String, String>)hostConfigMap.get(host);
        String base = hostPropMap.get("base");
        String transferMinSize = hostPropMap.get("transferMinSize");
        virtualHostHandler
                .addHost(
                        host,
                        Handlers.predicates(
                            PredicatedHandlersParser.parse("not path-prefix('/images', '/assets', '/api') -> rewrite('/index.html')"
                            //PredicatedHandlersParser.parse("not path-suffix['.js', '.html', '.css'] -> rewrite['/index.html']"
                            //PredicatedHandlersParser.parse("path-prefix['/home', '/page', '/form'] -> rewrite['/index.html']"
                            , LightServer.class.getClassLoader()),
                                new PathHandler(resource(new FileResourceManager(
                                        new File(base), Integer
                                        .valueOf(transferMinSize))))
                                        .addPrefixPath("/api/rs",
                                                new EagerFormParsingHandler().setNext(
                                                        new RestHandler()))
                                        .addPrefixPath("/api/ws",
                                                websocket(new WebSocketHandler()))
                        ));
    }
    String ip = (String)serverConfigMap.get("ip");
    String port = (String)serverConfigMap.get("port");
    server = Undertow
            .builder()
            .addHttpListener(Integer.valueOf(port), ip)
            .setBufferSize(1024 * 16)
            .setServerOption(UndertowOptions.ALWAYS_SET_KEEP_ALIVE, false)
            .setHandler(
                    Handlers.header(virtualHostHandler,
                            Headers.SERVER_STRING, "LIGHT"))
            .setWorkerThreads(200).build();
    server.start();

}