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* 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.transform;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.NAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.PROPERTIES;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.PROPERTY;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.VALUE;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.function.UnaryOperator;
import org.jboss.as.clustering.controller.Operations;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.controller.transform.OperationResultTransformer;
import org.jboss.as.controller.transform.OperationTransformer;
import org.jboss.as.controller.transform.TransformationContext;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.Property;
/**
* @author Radoslav Husar
* @author Paul Ferraro
*/
public class LegacyPropertyWriteOperationTransformer implements OperationTransformer {
private final UnaryOperator<PathAddress> addressTransformer;
/**
* Constructs a new LegacyPropertyWriteOperationTransformer with no address tranformation.
*/
public LegacyPropertyWriteOperationTransformer() {
this(UnaryOperator.identity());
}
/**
* Constructs a new LegacyPropertyWriteOperationTransformer applying the specified address transformation
* @param addressTransformer transforms an address containing aliases intoto the address under which the resource is registered.
*/
public LegacyPropertyWriteOperationTransformer(UnaryOperator<PathAddress> addressTransformer) {
this.addressTransformer = addressTransformer;
}
@Override
public TransformedOperation transformOperation(TransformationContext context, PathAddress address, ModelNode operation) throws OperationFailedException {
if (operation.get(NAME).asString().equals(PROPERTIES)) {
InitialAttributeValueOperationContextAttachment attachment = context.getAttachment(InitialAttributeValueOperationContextAttachment.INITIAL_VALUES_ATTACHMENT);
assert attachment != null;
// Workaround aliases limitations!
// we need to painstakingly undo path alias translations, since we need to know the address of the real resource,
// since the readResourceFromRoot() will not work on the aliased address
PathAddress resolvedAddress = this.addressTransformer.apply(address);
ModelNode initialValue = attachment.getInitialValue(resolvedAddress, Operations.getAttributeName(operation));
ModelNode newValue = context.readResourceFromRoot(resolvedAddress).getModel().get(PROPERTIES).clone();
if (initialValue.equals(newValue) || (initialValue.isDefined() && initialValue.asPropertyList().isEmpty() && !newValue.isDefined())) {
// There is nothing to do, discard this operation
return new TransformedOperation(null, DEFAULT_REJECTION_POLICY, SUCCESSFUL_RESULT);
}
final Map<String, ModelNode> oldMap = new HashMap<>();
if (initialValue.isDefined()) {
for (Property property : initialValue.asPropertyList()) {
oldMap.put(property.getName(), property.getValue());
}
}
// Transformed address for all operations
final PathAddress legacyAddress = Operations.getPathAddress(operation);
// This may result as multiple operations on the legacy node
List<ModelNode> operations = new LinkedList<>();
if (newValue.isDefined()) {
for (Property property : newValue.asPropertyList()) {
String key = property.getName();
ModelNode value = property.getValue();
if (!oldMap.containsKey(key)) {
// This is a newly added property => :add operation
ModelNode addOp = Util.createAddOperation(legacyAddress.append(PathElement.pathElement(PROPERTY, key)));
addOp.get(VALUE).set(value);
operations.add(addOp);
} else {
final ModelNode oldPropValue = oldMap.get(key);
if (!oldPropValue.equals(value)) {
// Property value is different => :write-attribute operation
ModelNode writeOp = Util.getWriteAttributeOperation(legacyAddress.append(PathElement.pathElement(PROPERTY, key)), VALUE, value);
operations.add(writeOp);
}
// Otherwise both property name and value are the same => no operation
// Remove this key
oldMap.remove(key);
}
}
}
// Properties that were removed = :remove operation
for (Map.Entry<String, ModelNode> prop : oldMap.entrySet()) {
ModelNode removeOperation = Util.createRemoveOperation(legacyAddress.append(PathElement.pathElement(PROPERTY, prop.getKey())));
operations.add(removeOperation);
}
initialValue.set(newValue.clone());
return new TransformedOperation(Operations.createCompositeOperation(operations), OperationResultTransformer.ORIGINAL_RESULT);
}
return new TransformedOperation(operation, OperationResultTransformer.ORIGINAL_RESULT);
}
}