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org.jboss.as.xts.XTSSubsystemParser Maven / Gradle / Ivy
/*
* Copyright The WildFly Authors
* SPDX-License-Identifier: Apache-2.0
*/
package org.jboss.as.xts;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.ADD;
import static org.jboss.as.xts.XTSSubsystemDefinition.DEFAULT_CONTEXT_PROPAGATION;
import static org.jboss.as.xts.XTSSubsystemDefinition.ASYNC_REGISTRATION;
import static org.jboss.as.xts.XTSSubsystemDefinition.ENVIRONMENT_URL;
import static org.jboss.as.xts.XTSSubsystemDefinition.HOST_NAME;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.List;
import java.util.Locale;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.controller.parsing.ParseUtils;
import org.jboss.as.controller.persistence.SubsystemMarshallingContext;
import org.jboss.dmr.ModelNode;
import org.jboss.staxmapper.XMLElementReader;
import org.jboss.staxmapper.XMLElementWriter;
import org.jboss.staxmapper.XMLExtendedStreamReader;
import org.jboss.staxmapper.XMLExtendedStreamWriter;
/**
* @author Andrew Dinn
* @author Tomaz Cerar
*/
class XTSSubsystemParser implements XMLStreamConstants, XMLElementReader>, XMLElementWriter {
/**
* {@inheritDoc}
*/
@Override
public void readElement(XMLExtendedStreamReader reader, List list) throws XMLStreamException {
// no attributes
if (reader.getAttributeCount() > 0) {
throw ParseUtils.unexpectedAttribute(reader, 0);
}
final ModelNode subsystem = Util.getEmptyOperation(ADD, PathAddress.pathAddress(XTSExtension.SUBSYSTEM_PATH)
.toModelNode());
list.add(subsystem);
final EnumSet encountered = EnumSet.noneOf(Element.class);
final List expected = getExpectedElements(reader);
while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
final Element element = Element.forName(reader.getLocalName());
if (!expected.contains(element) || !encountered.add(element)) {
throw ParseUtils.unexpectedElement(reader);
}
switch (element) {
case HOST: {
parseHostElement(reader, subsystem);
break;
}
case XTS_ENVIRONMENT: {
parseXTSEnvironmentElement(reader,subsystem);
break;
}
case DEFAULT_CONTEXT_PROPAGATION: {
parseDefaultContextPropagationElement(reader, subsystem);
break;
}
case ASYNC_REGISTRATION: {
parseAsyncRegistrationElement(reader, subsystem);
break;
}
default: {
throw ParseUtils.unexpectedElement(reader);
}
}
}
}
/**
* {@inheritDoc} XMLExtendedStreamReader reader
*/
@Override
public void writeContent(XMLExtendedStreamWriter writer, SubsystemMarshallingContext context) throws XMLStreamException {
context.startSubsystemElement(Namespace.CURRENT.getUriString(), false);
ModelNode node = context.getModelNode();
if (node.hasDefined(HOST_NAME.getName())) {
writer.writeStartElement(Element.HOST.getLocalName());
HOST_NAME.marshallAsAttribute(node, writer);
writer.writeEndElement();
}
if (node.hasDefined(ENVIRONMENT_URL.getName())) {
writer.writeStartElement(Element.XTS_ENVIRONMENT.getLocalName());
ENVIRONMENT_URL.marshallAsAttribute(node, writer);
writer.writeEndElement();
}
if (node.hasDefined(DEFAULT_CONTEXT_PROPAGATION.getName())) {
writer.writeStartElement(Element.DEFAULT_CONTEXT_PROPAGATION.getLocalName());
DEFAULT_CONTEXT_PROPAGATION.marshallAsAttribute(node, writer);
writer.writeEndElement();
}
if (node.hasDefined(ASYNC_REGISTRATION.getName())) {
writer.writeStartElement(Element.ASYNC_REGISTRATION.getLocalName());
ASYNC_REGISTRATION.marshallAsAttribute(node, writer);
writer.writeEndElement();
}
writer.writeEndElement();
}
private void parseHostElement(XMLExtendedStreamReader reader, ModelNode subsystem) throws XMLStreamException {
final EnumSet required = EnumSet.of(Attribute.NAME);
processAttributes(reader, (index, attribute) -> {
required.remove(attribute);
final String value = reader.getAttributeValue(index);
switch (attribute) {
case NAME:
HOST_NAME.parseAndSetParameter(value, subsystem, reader);
break;
default:
throw ParseUtils.unexpectedAttribute(reader, index);
}
});
// Handle elements
ParseUtils.requireNoContent(reader);
if (!required.isEmpty()) {
throw ParseUtils.missingRequired(reader, required);
}
}
/**
* Handle the xts-environment element
*
*
* @param reader
* @param subsystem
* @return ModelNode for the core-environment
* @throws javax.xml.stream.XMLStreamException
*
*/
private void parseXTSEnvironmentElement(XMLExtendedStreamReader reader, ModelNode subsystem) throws XMLStreamException {
processAttributes(reader, (index, attribute) -> {
final String value = reader.getAttributeValue(index);
switch (attribute) {
case URL:
ENVIRONMENT_URL.parseAndSetParameter(value, subsystem, reader);
break;
default:
throw ParseUtils.unexpectedAttribute(reader, index);
}
});
// Handle elements
ParseUtils.requireNoContent(reader);
}
/**
* Handle the enable-client-handler element.
*
* @param reader
* @param subsystem
* @throws XMLStreamException
*/
private void parseDefaultContextPropagationElement(XMLExtendedStreamReader reader, ModelNode subsystem) throws XMLStreamException {
processAttributes(reader, (index, attribute) -> {
final String value = reader.getAttributeValue(index);
switch (attribute) {
case ENABLED:
if (value == null || (!value.toLowerCase(Locale.ENGLISH).equals("true") && !value.toLowerCase(Locale.ENGLISH).equals("false"))) {
throw ParseUtils.invalidAttributeValue(reader, index);
}
DEFAULT_CONTEXT_PROPAGATION.parseAndSetParameter(value, subsystem, reader);
break;
default:
throw ParseUtils.unexpectedAttribute(reader, index);
}
});
// Handle elements
ParseUtils.requireNoContent(reader);
}
/**
* Handle the async-registration element.
*/
private void parseAsyncRegistrationElement(XMLExtendedStreamReader reader, ModelNode subsystem) throws XMLStreamException {
processAttributes(reader, (index, attribute) -> {
final String value = reader.getAttributeValue(index);
switch (attribute) {
case ENABLED:
ASYNC_REGISTRATION.parseAndSetParameter(value, subsystem, reader);
break;
default:
throw ParseUtils.unexpectedAttribute(reader, index);
}
});
// Handle elements
ParseUtils.requireNoContent(reader);
}
private List getExpectedElements(final XMLExtendedStreamReader reader) {
final Namespace namespace = Namespace.forUri(reader.getNamespaceURI());
final List elements = new ArrayList<>();
if (Namespace.XTS_1_0.equals(namespace)) {
elements.add(Element.XTS_ENVIRONMENT);
} else if (Namespace.XTS_2_0.equals(namespace)) {
elements.add(Element.XTS_ENVIRONMENT);
elements.add(Element.HOST);
elements.add(Element.DEFAULT_CONTEXT_PROPAGATION);
} else if (Namespace.XTS_3_0.equals(namespace)) {
elements.add(Element.XTS_ENVIRONMENT);
elements.add(Element.HOST);
elements.add(Element.DEFAULT_CONTEXT_PROPAGATION);
elements.add(Element.ASYNC_REGISTRATION);
}
return elements;
}
/**
* Functional interface to provide similar functionality as {@link BiConsumer}
* but with cought exception {@link XMLStreamException} declared.
*/
@FunctionalInterface
private interface AttributeProcessor {
void process(T t, R r) throws XMLStreamException;
}
/**
* Iterating over all attributes got from the reader parameter.
*
* @param reader reading the parameters from
* @param attributeProcessorCallback callback being processed for each attribute
* @throws XMLStreamException troubles parsing xml
*/
private void processAttributes(final XMLExtendedStreamReader reader, AttributeProcessor attributeProcessorCallback) throws XMLStreamException {
final int count = reader.getAttributeCount();
for (int i = 0; i < count; i++) {
ParseUtils.requireNoNamespaceAttribute(reader, i);
// final String value = reader.getAttributeValue(i);
final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
attributeProcessorCallback.process(i, attribute);
}
}
}
