/*
* 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 java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import io.undertow.server.handlers.proxy.LoadBalancingProxyClient;
import io.undertow.server.handlers.proxy.ProxyHandler;
import org.jboss.as.controller.AbstractAddStepHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.PersistentResourceDefinition;
import org.jboss.as.controller.ServiceRemoveStepHandler;
import org.jboss.as.controller.ServiceVerificationHandler;
import org.jboss.as.controller.SimpleAttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.access.management.SensitiveTargetAccessConstraintDefinition;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.registry.AttributeAccess;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.OperationEntry;
import org.jboss.as.network.OutboundSocketBinding;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceName;
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.Constants;
import org.wildfly.extension.undertow.UndertowExtension;
import org.wildfly.extension.undertow.UndertowService;
/**
* @author Stuart Douglas
* @author Tomaz Cerar
*/
public class ReverseProxyHandlerHost extends PersistentResourceDefinition {
public static final ReverseProxyHandlerHost INSTANCE = new ReverseProxyHandlerHost();
public static final ServiceName SERVICE_NAME = UndertowService.HANDLER.append("reverse-proxy", "host");
public static final SimpleAttributeDefinition OUTBOUND_SOCKET_BINDING = new SimpleAttributeDefinitionBuilder("outbound-socket-binding", ModelType.STRING, true) //todo consider what we can do to make this non nullable
.setAllowExpression(true)
.setFlags(AttributeAccess.Flag.RESTART_ALL_SERVICES)
.addAccessConstraint(SensitiveTargetAccessConstraintDefinition.SOCKET_BINDING_REF)
.build();
public static final AttributeDefinition SCHEME = new SimpleAttributeDefinitionBuilder("scheme", ModelType.STRING)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode("http"))
.build();
public static final AttributeDefinition PATH = new SimpleAttributeDefinitionBuilder("path", ModelType.STRING)
.setAllowNull(true)
.setAllowExpression(true)
.setDefaultValue(new ModelNode("/"))
.build();
public static final AttributeDefinition INSTANCE_ID = new SimpleAttributeDefinitionBuilder(Constants.INSTANCE_ID, ModelType.STRING)
.setAllowNull(true)
.setAllowExpression(true)
.build();
private ReverseProxyHandlerHost() {
super(PathElement.pathElement(Constants.HOST), UndertowExtension.getResolver(Constants.HANDLER, Constants.REVERSE_PROXY, Constants.HOST));
}
@Override
public Collection<AttributeDefinition> getAttributes() {
return Arrays.asList(OUTBOUND_SOCKET_BINDING, SCHEME, INSTANCE_ID, PATH);
}
@Override
public void registerOperations(ManagementResourceRegistration resourceRegistration) {
super.registerOperations(resourceRegistration);
ReverseProxyHostAdd add = new ReverseProxyHostAdd();
registerAddOperation(resourceRegistration, add, OperationEntry.Flag.RESTART_RESOURCE_SERVICES);
registerRemoveOperation(resourceRegistration, new ServiceRemoveStepHandler(SERVICE_NAME, add) {
@Override
protected ServiceName serviceName(String name, final PathAddress address) {
final String proxyName = address.getElement(address.size() - 2).getValue();
return SERVICE_NAME.append(proxyName).append(name);
}
}, OperationEntry.Flag.RESTART_RESOURCE_SERVICES);
}
private final class ReverseProxyHostAdd extends AbstractAddStepHandler {
@Override
protected void populateModel(ModelNode operation, ModelNode model) throws OperationFailedException {
for (AttributeDefinition def : getAttributes()) {
def.validateAndSet(operation, model);
}
}
@Override
protected void performRuntime(OperationContext context, ModelNode operation, ModelNode model, ServiceVerificationHandler verificationHandler, List<ServiceController<?>> newControllers) throws OperationFailedException {
final PathAddress address = PathAddress.pathAddress(operation.require(ModelDescriptionConstants.OP_ADDR));
final String name = address.getLastElement().getValue();
final String proxyName = address.getElement(address.size() - 2).getValue();
final String socketBinding = OUTBOUND_SOCKET_BINDING.resolveModelAttribute(context, model).asString();
final String scheme = SCHEME.resolveModelAttribute(context, model).asString();
final String path = PATH.resolveModelAttribute(context, model).asString();
final String jvmRoute;
if (model.hasDefined(Constants.INSTANCE_ID)) {
jvmRoute = INSTANCE_ID.resolveModelAttribute(context, model).asString();
} else {
jvmRoute = null;
}
ReverseProxyHostService service = new ReverseProxyHostService(scheme, jvmRoute, path);
ServiceBuilder<ReverseProxyHostService> builder = context.getServiceTarget().addService(SERVICE_NAME.append(proxyName).append(name), service)
.addDependency(UndertowService.HANDLER.append(proxyName), ProxyHandler.class, service.proxyHandler)
.addDependency(OutboundSocketBinding.OUTBOUND_SOCKET_BINDING_BASE_SERVICE_NAME.append(socketBinding), OutboundSocketBinding.class, service.socketBinding);
if (verificationHandler != null) {
builder.addListener(verificationHandler);
}
ServiceController<ReverseProxyHostService> controller = builder.install();
if (newControllers != null) {
newControllers.add(controller);
}
}
}
private static final class ReverseProxyHostService implements Service<ReverseProxyHostService> {
private final InjectedValue<ProxyHandler> proxyHandler = new InjectedValue<>();
private final InjectedValue<OutboundSocketBinding> socketBinding = new InjectedValue<>();
private final String instanceId;
private final String scheme;
private final String path;
private ReverseProxyHostService(String scheme, String instanceId, String path) {
this.instanceId = instanceId;
this.scheme = scheme;
this.path = path;
}
private URI getUri() throws URISyntaxException {
OutboundSocketBinding binding = socketBinding.getValue();
return new URI(scheme, null, binding.getUnresolvedDestinationAddress(), binding.getDestinationPort(), path, null, null);
}
@Override
public void start(StartContext startContext) throws StartException {
final LoadBalancingProxyClient client = (LoadBalancingProxyClient) proxyHandler.getValue().getProxyClient();
try {
client.addHost(getUri(), instanceId);
} catch (URISyntaxException e) {
throw new StartException(e);
}
}
@Override
public void stop(StopContext stopContext) {
final LoadBalancingProxyClient client = (LoadBalancingProxyClient) proxyHandler.getValue().getProxyClient();
try {
client.removeHost(getUri());
} catch (URISyntaxException e) {
throw new RuntimeException(e); //impossible
}
}
@Override
public ReverseProxyHostService getValue() throws IllegalStateException, IllegalArgumentException {
return this;
}
}
}