org.jboss.as.clustering.controller.ReadAttributeTranslationHandler Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of wildfly-clustering-common Show documentation
Show all versions of wildfly-clustering-common Show documentation
The code in this module is not explicitly related to clustering, but rather contains resuable code used by clustering modules
and any modules that integrate with clustering.
/*
* JBoss, Home of Professional Open Source.
* Copyright 2016, 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.jboss.as.clustering.controller;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.logging.ControllerLogger;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.controller.registry.ImmutableManagementResourceRegistration;
import org.jboss.as.controller.registry.Resource;
import org.jboss.dmr.ModelNode;
/**
* A read-attribute operation handler that translates a value from another attribute
* @author Paul Ferraro
*/
public class ReadAttributeTranslationHandler implements OperationStepHandler {
private final AttributeTranslation translation;
public ReadAttributeTranslationHandler(AttributeTranslation translation) {
this.translation = translation;
}
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
PathAddress currentAddress = context.getCurrentAddress();
PathAddress targetAddress = this.translation.getPathAddressTransformation().apply(currentAddress);
Attribute targetAttribute = this.translation.getTargetAttribute();
ModelNode targetOperation = Util.getReadAttributeOperation(targetAddress, targetAttribute.getName());
if (operation.hasDefined(ModelDescriptionConstants.INCLUDE_DEFAULTS)) {
targetOperation.get(ModelDescriptionConstants.INCLUDE_DEFAULTS).set(operation.get(ModelDescriptionConstants.INCLUDE_DEFAULTS));
}
ImmutableManagementResourceRegistration registration = (currentAddress == targetAddress) ? context.getResourceRegistration() : context.getRootResourceRegistration().getSubModel(targetAddress);
if (registration == null) {
throw new OperationFailedException(ControllerLogger.MGMT_OP_LOGGER.noSuchResourceType(targetAddress));
}
OperationStepHandler readAttributeHandler = registration.getAttributeAccess(PathAddress.EMPTY_ADDRESS, targetAttribute.getName()).getReadHandler();
OperationStepHandler readTranslatedAttributeHandler = new ReadTranslatedAttributeStepHandler(readAttributeHandler, targetAttribute, this.translation.getReadTranslator());
// If targetOperation applies to the current resource, we can execute in the current step
if (targetAddress == currentAddress) {
readTranslatedAttributeHandler.execute(context, targetOperation);
} else {
if (registration.isRuntimeOnly()) {
try {
context.readResourceFromRoot(targetAddress, false);
} catch (Resource.NoSuchResourceException ignore) {
// If the target runtime resource does not exist return UNDEFINED
return;
}
}
context.addStep(targetOperation, readTranslatedAttributeHandler, context.getCurrentStage(), true);
}
}
private static class ReadTranslatedAttributeStepHandler implements OperationStepHandler {
private final OperationStepHandler readHandler;
private final Attribute targetAttribute;
private final AttributeValueTranslator translator;
ReadTranslatedAttributeStepHandler(OperationStepHandler readHandler, Attribute targetAttribute, AttributeValueTranslator translator) {
this.readHandler = readHandler;
this.targetAttribute = targetAttribute;
this.translator = translator;
}
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
if (this.readHandler != null) {
this.readHandler.execute(context, operation);
} else {
try {
// If attribute has no read handler, simulate one
ModelNode model = context.readResource(PathAddress.EMPTY_ADDRESS, false).getModel();
ModelNode result = context.getResult();
if (model.hasDefined(this.targetAttribute.getName())) {
result.set(model.get(this.targetAttribute.getName()));
} else if (operation.get(ModelDescriptionConstants.INCLUDE_DEFAULTS).asBoolean(true)) {
ModelNode defaultValue = this.targetAttribute.getDefinition().getDefaultValue();
if (defaultValue != null) {
result.set(defaultValue);
}
}
} catch (Resource.NoSuchResourceException ignore) {
// If the target resource does not exist return UNDEFINED
return;
}
}
ModelNode result = context.getResult();
result.set(this.translator.translate(context, result));
}
}
}