/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, 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;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import io.undertow.server.HttpHandler;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
import org.wildfly.extension.undertow.filters.FilterRef;
import org.wildfly.extension.undertow.logging.UndertowLogger;
/**
* @author <a href="mailto:tomaz.cerar@redhat.com">Tomaz Cerar</a> (c) 2013 Red Hat Inc.
*/
public class LocationService implements Service<LocationService> {
private final String locationPath;
private final InjectedValue<HttpHandler> httpHandler = new InjectedValue<>();
private final InjectedValue<Host> host = new InjectedValue<>();
private final CopyOnWriteArrayList<InjectedValue<FilterRef>> filters = new CopyOnWriteArrayList<>();
public LocationService(String locationPath) {
this.locationPath = locationPath;
}
@Override
public void start(StartContext context) throws StartException {
UndertowLogger.ROOT_LOGGER.tracef("registering handler %s under path '%s'", httpHandler.getValue(), locationPath);
host.getValue().registerHandler(locationPath, configureHandler());
}
@Override
public void stop(StopContext context) {
host.getValue().unregisterHandler(locationPath);
}
@Override
public LocationService getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
InjectedValue<Host> getHost() {
return host;
}
InjectedValue<HttpHandler> getHttpHandler() {
return httpHandler;
}
List<InjectedValue<FilterRef>> getFilters() {
return filters;
}
private HttpHandler configureHandler() {
ArrayList<FilterRef> filters = new ArrayList<>(this.filters.size());
for (InjectedValue<FilterRef> injectedFilter : this.filters) {
filters.add(injectedFilter.getValue());
}
return configureHandlerChain(getHttpHandler().getValue(), filters);
}
protected static HttpHandler configureHandlerChain(HttpHandler rootHandler, List<FilterRef> filters) {
Collections.sort(filters, new Comparator<FilterRef>() {
@Override
public int compare(FilterRef o1, FilterRef o2) {
return o1.getPriority() >= o2.getPriority() ? 1 : -1;
}
});
Collections.reverse(filters); //handler chain goes last first
HttpHandler handler = rootHandler;
for (FilterRef filter : filters) {
handler = filter.createHttpHandler(handler);
}
return handler;
}
}