/*
* 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.filters;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import io.undertow.Handlers;
import io.undertow.predicate.Predicate;
import io.undertow.server.HttpHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.PropertiesAttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.dmr.Property;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.ModuleLoader;
import org.wildfly.extension.undertow.deployment.ConfiguredHandlerWrapper;
import org.wildfly.extension.undertow.logging.UndertowLogger;
/**
* @author Tomaz Cerar (c) 2014 Red Hat Inc.
*/
public class CustomFilterDefinition extends Filter {
public static final AttributeDefinition CLASS_NAME = new SimpleAttributeDefinitionBuilder("class-name", ModelType.STRING)
.setRequired(true)
.setAllowExpression(true)
.setRestartAllServices()
.build();
public static final AttributeDefinition MODULE = new SimpleAttributeDefinitionBuilder("module", ModelType.STRING)
.setRequired(true)
.setAllowExpression(true)
.setRestartAllServices()
.build();
public static final PropertiesAttributeDefinition PARAMETERS = new PropertiesAttributeDefinition.Builder("parameters", true)
.setRequired(false)
.setWrapXmlElement(false)
.setXmlName("param")
.setAllowExpression(true)
.setRestartAllServices()
.build();
public static final CustomFilterDefinition INSTANCE = new CustomFilterDefinition();
private CustomFilterDefinition() {
super("custom-filter");
}
@Override
public Collection<AttributeDefinition> getAttributes() {
return Arrays.asList(CLASS_NAME, MODULE, PARAMETERS);
}
@Override
public HttpHandler createHttpHandler(Predicate predicate, ModelNode model, HttpHandler next) {
String className = model.get(CLASS_NAME.getName()).asString();
String moduleName = model.get(MODULE.getName()).asString();
Map<String, String> params = unwrap(model);
UndertowLogger.ROOT_LOGGER.debugf("Creating http handler %s from module %s with parameters %s", className, moduleName, params);
Class<?> clazz = getHandlerClass(className, moduleName);
ConfiguredHandlerWrapper wrapper = new ConfiguredHandlerWrapper(clazz, params);
if (predicate != null) {
return Handlers.predicate(predicate, wrapper.wrap(next), next);
} else {
return wrapper.wrap(next);
}
}
@Override
protected Class[] getConstructorSignature() {
throw new IllegalStateException(); //should not be used, as the handler is constructed above
}
protected Class<?> getHandlerClass(String className, String moduleName) {
ModuleLoader moduleLoader = Module.getBootModuleLoader();
try {
Module filterModule = moduleLoader.loadModule(ModuleIdentifier.fromString(moduleName));
return filterModule.getClassLoader().loadClassLocal(className);
} catch (ModuleLoadException | ClassNotFoundException e) {
throw UndertowLogger.ROOT_LOGGER.couldNotLoadHandlerFromModule(className,moduleName,e);
}
}
private Map<String, String> unwrap(final ModelNode model) {
if (!model.hasDefined(PARAMETERS.getName())) {
return Collections.emptyMap();
}
ModelNode modelProps = model.get(PARAMETERS.getName());
Map<String, String> props = new HashMap<String, String>();
for (Property p : modelProps.asPropertyList()) {
props.put(p.getName(), p.getValue().asString());
}
return props;
}
}