ModelReader.java example

Explorer
wildfly-master
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* as indicated by the @author tags. See the copyright.txt file in the
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*
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* 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,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
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* License along with this software; if not, write to the Free
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package org.jboss.as.jsr77.managedobject;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.DEPLOYMENT;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.FAILURE_DESCRIPTION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.READ_RESOURCE_OPERATION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.RECURSIVE;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.RESULT;

import org.jboss.as.controller.ModelController;
import org.jboss.as.controller.ModelController.OperationTransactionControl;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.client.OperationMessageHandler;
import org.jboss.dmr.ModelNode;


/**
 *
 * @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
 */
public class ModelReader {
    private final ModelController controller;
    private volatile ModelNode deploymentModel;

    public ModelReader(ModelController controller) {
        this.controller = controller;
    }

    ModelNode getDeploymentModel() {
        if (deploymentModel == null) {
            ModelNode operation = new ModelNode();
            operation.get(OP).set(READ_RESOURCE_OPERATION);
            operation.get(RECURSIVE).set(true);
            operation.get(OP_ADDR).set(PathAddress.pathAddress(PathElement.pathElement(DEPLOYMENT)).toModelNode());
            deploymentModel = execute(operation);
        }
        return deploymentModel;
    }

    ModelNode execute(ModelNode operation) {
        ModelNode result = controller.execute(operation, OperationMessageHandler.logging, OperationTransactionControl.COMMIT, null);
        if (result.hasDefined(FAILURE_DESCRIPTION)) {
            throw new RuntimeException(result.get(FAILURE_DESCRIPTION).toString());
        }
        return result.require(RESULT);
    }

    void setDeploymentModel(ModelNode deploymentModel) {
        this.deploymentModel = deploymentModel;
    }
}