/*
 * Copyright 2014 Red Hat, Inc.
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  and Apache License v2.0 which accompanies this distribution.
 *
 *  The Eclipse Public License is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  The Apache License v2.0 is available at
 *  http://www.opensource.org/licenses/apache2.0.php
 *
 *  You may elect to redistribute this code under either of these licenses.
 */
package io.vertx.ext.web.impl;

import io.vertx.core.Handler;
import io.vertx.ext.web.Route;
import io.vertx.ext.web.RoutingContext;

import java.util.Objects;

Wraps a handler that would normally block and turn it into a non-blocking handler. This is done by calling Vertx.executeBlocking(Handler<Promise<Object>>, Handler<AsyncResult<Object>>) and wrapping the context to overload RoutingContext.next() so that the next handler is run on the original event loop
Author:
/** * Wraps a handler that would normally block and turn it into a non-blocking handler. * This is done by calling {@link io.vertx.core.Vertx#executeBlocking(Handler, Handler)} * and wrapping the context to overload {@link RoutingContext#next()} so that * the next handler is run on the original event loop * * @author <a href="mailto:stephane.bastian.dev@gmail.com>Stéphane Bastian</a> * */
public class BlockingHandlerDecorator implements Handler<RoutingContext> { private boolean ordered; private final Handler<RoutingContext> decoratedHandler; public BlockingHandlerDecorator(Handler<RoutingContext> decoratedHandler, boolean ordered) { Objects.requireNonNull(decoratedHandler); this.decoratedHandler = decoratedHandler; this.ordered = ordered; } @Override public void handle(RoutingContext context) { Route currentRoute = context.currentRoute(); context.vertx().executeBlocking(fut -> { decoratedHandler.handle(new RoutingContextDecorator(currentRoute, context)); fut.complete(); }, ordered, res -> { if (res.failed()) { // This means an exception was thrown from the blocking handler context.fail(res.cause()); } }); } }