org.jboss.as.clustering.controller.AddIfAbsentStepHandler Maven / Gradle / Ivy
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*
* 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
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*
* This software is distributed in the hope that it will be useful,
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* 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
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package org.jboss.as.clustering.controller;
import java.util.function.BiPredicate;
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.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.registry.Resource;
import org.jboss.dmr.ModelNode;
/**
* Adds a given child resource if absent.
* @author Paul Ferraro
*/
public class AddIfAbsentStepHandler implements OperationStepHandler {
private final BiPredicate present;
public AddIfAbsentStepHandler(BiPredicate present) {
this.present = present;
}
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
PathAddress address = context.getCurrentAddress();
Resource parentResource = context.readResourceFromRoot(address.getParent(), false);
if (!this.present.test(parentResource, address.getLastElement())) {
context.getResourceRegistration().getOperationHandler(PathAddress.EMPTY_ADDRESS, ModelDescriptionConstants.ADD).execute(context, operation);
}
}
}