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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 2015, 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 java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.function.BiPredicate;
import java.util.function.Predicate;
import java.util.function.UnaryOperator;
import org.jboss.as.controller.AbstractAddStepHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.CapabilityReferenceRecorder;
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.PathElement;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.SimpleOperationDefinitionBuilder;
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.AttributeAccess;
import org.jboss.as.controller.registry.ImmutableManagementResourceRegistration;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.OperationEntry;
import org.jboss.as.controller.registry.Resource;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
/**
* Generic add operation step handler that delegates service installation/rollback to a {@link ResourceServiceHandler}.
* @author Paul Ferraro
*/
public class AddStepHandler extends AbstractAddStepHandler implements ManagementRegistrar, DescribedAddStepHandler {
private final AddStepHandlerDescriptor descriptor;
private final ResourceServiceHandler handler;
public AddStepHandler(AddStepHandlerDescriptor descriptor) {
this(descriptor, null);
}
public AddStepHandler(AddStepHandlerDescriptor descriptor, ResourceServiceHandler handler) {
this.descriptor = descriptor;
this.handler = handler;
}
@Override
protected boolean requiresRuntime(OperationContext context) {
return super.requiresRuntime(context) && (this.handler != null);
}
@Override
public AddStepHandlerDescriptor getDescriptor() {
return this.descriptor;
}
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
PathAddress address = context.getCurrentAddress();
PathAddress parentAddress = address.getParent();
PathElement path = address.getLastElement();
OperationStepHandler parentHandler = context.getRootResourceRegistration().getOperationHandler(parentAddress, ModelDescriptionConstants.ADD);
if (parentHandler instanceof DescribedAddStepHandler) {
AddStepHandlerDescriptor parentDescriptor = ((DescribedAddStepHandler) parentHandler).getDescriptor();
if (parentDescriptor.getRequiredChildren().contains(path)) {
if (context.readResourceFromRoot(parentAddress, false).hasChild(path)) {
// If we are a required child resource of our parent, we need to remove the auto-created resource first
context.addStep(Util.createRemoveOperation(address), context.getRootResourceRegistration().getOperationHandler(address, ModelDescriptionConstants.REMOVE), OperationContext.Stage.MODEL);
context.addStep(operation, this, OperationContext.Stage.MODEL);
return;
}
}
for (PathElement requiredPath : parentDescriptor.getRequiredSingletonChildren()) {
String requiredPathKey = requiredPath.getKey();
if (requiredPath.getKey().equals(path.getKey())) {
Set childrenNames = context.readResourceFromRoot(parentAddress, false).getChildrenNames(requiredPathKey);
if (!childrenNames.isEmpty()) {
// If there is a required singleton sibling resource, we need to remove it first
for (String childName : childrenNames) {
PathAddress singletonAddress = parentAddress.append(requiredPathKey, childName);
context.addStep(Util.createRemoveOperation(singletonAddress), context.getRootResourceRegistration().getOperationHandler(singletonAddress, ModelDescriptionConstants.REMOVE), OperationContext.Stage.MODEL);
}
context.addStep(operation, this, OperationContext.Stage.MODEL);
return;
}
}
}
}
super.execute(context, operation);
if (this.requiresRuntime(context)) {
for (RuntimeResourceRegistration registration : this.descriptor.getRuntimeResourceRegistrations()) {
context.addStep(new RuntimeResourceRegistrationStepHandler(registration), OperationContext.Stage.MODEL);
}
}
}
@Override
protected Resource createResource(OperationContext context) {
Resource resource = Resource.Factory.create(context.getResourceRegistration().isRuntimeOnly());
if (context.isDefaultRequiresRuntime()) {
resource = this.descriptor.getResourceTransformation().apply(resource);
}
context.addResource(PathAddress.EMPTY_ADDRESS, resource);
return resource;
}
@Override
protected Resource createResource(OperationContext context, ModelNode operation) {
UnaryOperator transformation = context.isDefaultRequiresRuntime() ? this.descriptor.getResourceTransformation() : UnaryOperator.identity();
ImmutableManagementResourceRegistration registration = context.getResourceRegistration();
Resource resource = transformation.apply(Resource.Factory.create(registration.isRuntimeOnly(), registration.getOrderedChildTypes()));
Integer index = registration.isOrderedChildResource() && operation.hasDefined(ModelDescriptionConstants.ADD_INDEX) ? operation.get(ModelDescriptionConstants.ADD_INDEX).asIntOrNull() : null;
if (index == null) {
context.addResource(PathAddress.EMPTY_ADDRESS, resource);
} else {
context.addResource(PathAddress.EMPTY_ADDRESS, index, resource);
}
return resource;
}
@Override
protected void populateModel(OperationContext context, ModelNode operation, Resource resource) throws OperationFailedException {
// Validate extra add operation parameters
for (AttributeDefinition definition : this.descriptor.getExtraParameters()) {
definition.validateOperation(operation);
}
PathAddress currentAddress = context.getCurrentAddress();
// Validate and apply attribute translations
Map translations = this.descriptor.getAttributeTranslations();
for (Map.Entry entry : translations.entrySet()) {
AttributeDefinition sourceParameter = entry.getKey();
AttributeTranslation translation = entry.getValue();
if (operation.hasDefined(sourceParameter.getName())) {
ModelNode value = sourceParameter.validateOperation(operation);
ModelNode targetValue = translation.getWriteTranslator().translate(context, value);
Attribute targetAttribute = translation.getTargetAttribute();
PathAddress targetAddress = translation.getPathAddressTransformation().apply(currentAddress);
// If target attribute exists in the current resource, just fix the operation
// Otherwise, we need a separate write-attribute operation
if (targetAddress == currentAddress) {
String targetName = targetAttribute.getName();
if (!operation.hasDefined(targetName)) {
operation.get(targetName).set(targetValue);
}
} else {
ModelNode writeAttributeOperation = Util.getWriteAttributeOperation(targetAddress, targetAttribute.getName(), targetValue);
ImmutableManagementResourceRegistration registration = (currentAddress == targetAddress) ? context.getResourceRegistration() : context.getRootResourceRegistration().getSubModel(targetAddress);
if (registration == null) {
throw new OperationFailedException(ControllerLogger.MGMT_OP_LOGGER.noSuchResourceType(targetAddress));
}
OperationStepHandler writeAttributeHandler = registration.getAttributeAccess(PathAddress.EMPTY_ADDRESS, targetAttribute.getName()).getWriteHandler();
context.addStep(writeAttributeOperation, writeAttributeHandler, OperationContext.Stage.MODEL);
}
}
}
// Validate proper attributes
ModelNode model = resource.getModel();
ImmutableManagementResourceRegistration registration = context.getResourceRegistration();
for (String attributeName : registration.getAttributeNames(PathAddress.EMPTY_ADDRESS)) {
AttributeAccess attribute = registration.getAttributeAccess(PathAddress.EMPTY_ADDRESS, attributeName);
AttributeDefinition definition = attribute.getAttributeDefinition();
if ((attribute.getStorageType() == AttributeAccess.Storage.CONFIGURATION) && !translations.containsKey(definition)) {
OperationStepHandler writeHandler = this.descriptor.getCustomAttributes().get(definition);
if (writeHandler != null) {
// If attribute has custom handling, perform a separate write-attribute operation
ModelNode writeAttributeOperation = Util.getWriteAttributeOperation(currentAddress, definition.getName(), definition.validateOperation(operation));
context.addStep(writeAttributeOperation, writeHandler, OperationContext.Stage.MODEL);
} else {
definition.validateAndSet(operation, model);
}
}
}
// Auto-create required child resources as necessary
addRequiredChildren(context, this.descriptor.getRequiredChildren(), (Resource parent, PathElement path) -> parent.hasChild(path));
addRequiredChildren(context, this.descriptor.getRequiredSingletonChildren(), (Resource parent, PathElement path) -> parent.hasChildren(path.getKey()));
// Don't leave model undefined
if (!model.isDefined()) {
model.setEmptyObject();
}
}
private static void addRequiredChildren(OperationContext context, Collection paths, BiPredicate present) {
for (PathElement path : paths) {
context.addStep(Util.createAddOperation(context.getCurrentAddress().append(path)), new AddIfAbsentStepHandler(present), OperationContext.Stage.MODEL);
}
}
@Override
protected void performRuntime(OperationContext context, ModelNode operation, ModelNode model) throws OperationFailedException {
this.handler.installServices(context, model);
}
@Override
protected void rollbackRuntime(OperationContext context, ModelNode operation, Resource resource) {
try {
this.handler.removeServices(context, resource.getModel());
} catch (OperationFailedException e) {
throw new IllegalStateException(e);
}
}
@Override
protected void recordCapabilitiesAndRequirements(OperationContext context, ModelNode operation, Resource resource) throws OperationFailedException {
PathAddress address = context.getCurrentAddress();
ModelNode model = resource.getModel();
// The super implementation assumes that the capability name is a simple extension of the base name - we do not.
// Only register capabilities when allowed by the associated predicate
for (Map.Entry> entry : this.descriptor.getCapabilities().entrySet()) {
if (entry.getValue().test(model)) {
context.registerCapability(entry.getKey().resolve(address));
}
}
ImmutableManagementResourceRegistration registration = context.getResourceRegistration();
for (String attributeName : registration.getAttributeNames(PathAddress.EMPTY_ADDRESS)) {
AttributeDefinition attribute = registration.getAttributeAccess(PathAddress.EMPTY_ADDRESS, attributeName).getAttributeDefinition();
if (attribute.hasCapabilityRequirements()) {
attribute.addCapabilityRequirements(context, resource, model.get(attributeName));
}
}
for (CapabilityReferenceRecorder recorder : registration.getRequirements()) {
recorder.addCapabilityRequirements(context, resource, null);
}
}
@Override
public void register(ManagementResourceRegistration registration) {
SimpleOperationDefinitionBuilder builder = new SimpleOperationDefinitionBuilder(ModelDescriptionConstants.ADD, this.descriptor.getDescriptionResolver()).withFlag(OperationEntry.Flag.RESTART_NONE);
if (registration.isOrderedChildResource()) {
builder.addParameter(SimpleAttributeDefinitionBuilder.create(ModelDescriptionConstants.ADD_INDEX, ModelType.INT, true).build());
}
for (AttributeDefinition attribute : this.descriptor.getAttributes()) {
builder.addParameter(attribute);
}
for (AttributeDefinition attribute : this.descriptor.getCustomAttributes().keySet()) {
builder.addParameter(attribute);
}
for (AttributeDefinition attribute : this.descriptor.getIgnoredAttributes()) {
builder.addParameter(attribute);
}
for (AttributeDefinition parameter : this.descriptor.getExtraParameters()) {
builder.addParameter(parameter);
}
for (AttributeDefinition attribute : this.descriptor.getAttributeTranslations().keySet()) {
builder.addParameter(attribute);
}
registration.registerOperationHandler(builder.build(), this.descriptor.getAddOperationTransformation().apply(this));
}
}