/*
* JBoss, Home of Professional Open Source.
* Copyright 2017, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.extension.undertow.deployment;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.SameThreadExecutor;
import java.util.ArrayList;
import java.util.List;
/**
* @author Stuart Douglas
*/
public class GateHandlerWrapper implements HandlerWrapper {
private final List<Holder> held = new ArrayList<>();
private volatile boolean open = false;
public synchronized void open() {
open = true;
for(Holder holder : held) {
holder.exchange.dispatch(holder.next);
}
held.clear();
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new GateHandler(handler);
}
private final class GateHandler implements HttpHandler {
private final HttpHandler next;
private GateHandler(HttpHandler next) {
this.next = next;
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
if(open) {
next.handleRequest(exchange);
return;
}
synchronized (GateHandlerWrapper.this) {
if(open) {
next.handleRequest(exchange);
} else {
exchange.dispatch(SameThreadExecutor.INSTANCE, new Runnable() {
@Override
public void run() {
synchronized (GateHandlerWrapper.this) {
if(open) {
exchange.dispatch(next);
} else {
held.add(new Holder(next, exchange));
}
}
}
});
}
}
}
}
private static final class Holder {
final HttpHandler next;
final HttpServerExchange exchange;
private Holder(HttpHandler next, HttpServerExchange exchange) {
this.next = next;
this.exchange = exchange;
}
}
}