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 javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
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.AttributeMarshaller;
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)
.setAllowNull(false)
.setAllowExpression(true)
.build();
public static final AttributeDefinition MODULE = new SimpleAttributeDefinitionBuilder("module", ModelType.STRING)
.setAllowNull(false)
.setAllowExpression(true)
.build();
public static final PropertiesAttributeDefinition PARAMETERS = new PropertiesAttributeDefinition.Builder("parameters", true)
.setAllowNull(true)
.setWrapXmlElement(false)
.setXmlName("param")
.setAllowExpression(true)
.setAttributeMarshaller(new AttributeMarshaller() { //todo not needed once https://github.com/wildfly/wildfly-core/pull/86 is merged
@Override
public boolean isMarshallable(AttributeDefinition attribute, ModelNode resourceModel, boolean marshallDefault) {
return resourceModel.isDefined() && resourceModel.hasDefined(attribute.getName());
}
@Override
public void marshallAsElement(AttributeDefinition attribute, ModelNode resourceModel, boolean marshallDefault, XMLStreamWriter writer) throws XMLStreamException {
if (!resourceModel.hasDefined(attribute.getName())) {
return;
}
resourceModel = resourceModel.get(attribute.getName());
for (ModelNode property : resourceModel.asList()) {
writer.writeEmptyElement(attribute.getXmlName());
writer.writeAttribute(org.jboss.as.controller.parsing.Attribute.NAME.getLocalName(), property.asProperty().getName());
writer.writeAttribute(org.jboss.as.controller.parsing.Attribute.VALUE.getLocalName(), property.asProperty().getValue().asString());
}
}
@Override
public void marshallAsAttribute(AttributeDefinition attribute, ModelNode resourceModel, boolean marshallDefault, XMLStreamWriter writer) throws XMLStreamException {
marshallAsElement(attribute, resourceModel, marshallDefault, writer);
}
@Override
public boolean isMarshallableAsElement() {
return true;
}
})
.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);
}
}
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;
}
}