/*
* 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.handlers;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.ResponseCodeHandler;
import io.undertow.server.handlers.proxy.ExclusivityChecker;
import io.undertow.server.handlers.proxy.LoadBalancingProxyClient;
import io.undertow.server.handlers.proxy.ProxyHandler;
import io.undertow.util.Headers;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PersistentResourceDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.wildfly.extension.undertow.Constants;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* @author Stuart Douglas
*/
public class ReverseProxyHandler extends Handler {
public static final AttributeDefinition PROBLEM_SERVER_RETRY = new SimpleAttributeDefinitionBuilder(Constants.PROBLEM_SERVER_RETRY, ModelType.INT)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode(30))
.build();
public static final AttributeDefinition SESSION_COOKIE_NAMES = new SimpleAttributeDefinitionBuilder(Constants.SESSION_COOKIE_NAMES, ModelType.STRING)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode("JSESSIONID"))
.build();
public static final AttributeDefinition CONNECTIONS_PER_THREAD = new SimpleAttributeDefinitionBuilder(Constants.CONNECTIONS_PER_THREAD, ModelType.INT)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode(10))
.build();
public static final AttributeDefinition MAX_REQUEST_TIME = new SimpleAttributeDefinitionBuilder(Constants.MAX_REQUEST_TIME, ModelType.INT)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode(-1))
.build();
public static final ReverseProxyHandler INSTANCE = new ReverseProxyHandler();
private ReverseProxyHandler() {
super(Constants.REVERSE_PROXY);
}
@Override
public Collection<AttributeDefinition> getAttributes() {
return Arrays.asList(CONNECTIONS_PER_THREAD, SESSION_COOKIE_NAMES, PROBLEM_SERVER_RETRY);
}
@Override
protected List<? extends PersistentResourceDefinition> getChildren() {
return Collections.<PersistentResourceDefinition>singletonList(ReverseProxyHandlerHost.INSTANCE);
}
@Override
public HttpHandler createHandler(final OperationContext context, ModelNode model) throws OperationFailedException {
String sessionCookieNames = SESSION_COOKIE_NAMES.resolveModelAttribute(context, model).asString();
int connectionsPerThread = CONNECTIONS_PER_THREAD.resolveModelAttribute(context, model).asInt();
int problemServerRetry = PROBLEM_SERVER_RETRY.resolveModelAttribute(context, model).asInt();
int maxTime = MAX_REQUEST_TIME.resolveModelAttribute(context, model).asInt();
final LoadBalancingProxyClient lb = new LoadBalancingProxyClient(new ExclusivityChecker() {
@Override
public boolean isExclusivityRequired(HttpServerExchange exchange) {
//we always create a new connection for upgrade requests
return exchange.getRequestHeaders().contains(Headers.UPGRADE);
}
})
.setConnectionsPerThread(connectionsPerThread)
.setProblemServerRetry(problemServerRetry);
String[] sessionIds = sessionCookieNames.split(",");
for (String id : sessionIds) {
lb.addSessionCookieName(id);
}
ProxyHandler handler = new ProxyHandler(lb, maxTime, ResponseCodeHandler.HANDLE_404);
return handler;
}
}