Package org.jboss.as.server.deployment.scanner

Source Code of org.jboss.as.server.deployment.scanner.DeploymentScannerEnable

/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, 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.server.deployment.scanner;

import org.jboss.as.controller.BasicOperationResult;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationResult;
import org.jboss.as.controller.RuntimeTask;
import org.jboss.as.controller.RuntimeTaskContext;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;

import org.jboss.as.controller.ModelUpdateOperationHandler;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.ResultHandler;
import org.jboss.as.server.deployment.scanner.api.DeploymentScanner;
import org.jboss.dmr.ModelNode;
import org.jboss.msc.service.ServiceController;

/**
* @author Emanuel Muckenhuber
*/
class DeploymentScannerEnable  implements ModelUpdateOperationHandler {

    static final DeploymentScannerEnable INSTANCE = new DeploymentScannerEnable();

    private DeploymentScannerEnable() {
        //
    }

    /** {@inheritDoc} */
    @Override
    public OperationResult execute(final OperationContext context, final ModelNode operation, final ResultHandler resultHandler) throws OperationFailedException {

        final PathAddress address = PathAddress.pathAddress(operation.require(OP_ADDR));
        final String name = address.getLastElement().getValue();

        final ModelNode compensatingOperation = new ModelNode();
        compensatingOperation.get(OP).set("disable");
        compensatingOperation.get(OP_ADDR).set(operation.require(OP_ADDR));
        // update the model
        context.getSubModel().get(CommonAttributes.SCAN_ENABLED).set(true);

        if (context.getRuntimeContext() != null) {
            context.getRuntimeContext().setRuntimeTask(new RuntimeTask() {
                public void execute(RuntimeTaskContext context) throws OperationFailedException {
                    final ServiceController<?> controller = context.getServiceRegistry().getService(DeploymentScannerService.getServiceName(name));
                    if (controller == null) {
                        throw new OperationFailedException(new ModelNode().set("scanner not configured"));
                    } else {
                        try {
                            final DeploymentScanner scanner = (DeploymentScanner) controller.getValue();
                            scanner.startScanner();
                            resultHandler.handleResultComplete();
                        } catch (Throwable t) {
                            throw new OperationFailedException(getFailureResult(t));
                        }
                    }
                }
            });
        } else {
            resultHandler.handleResultComplete();
        }
        return new BasicOperationResult(compensatingOperation);
    }

    protected ModelNode getFailureResult(Throwable t) {
        final ModelNode node = new ModelNode();
        // todo - define this structure
        node.get("success").set(false);
        do {
            final String message = t.getLocalizedMessage();
            node.get("cause").add(t.getClass().getName(), message != null ? message : "");
            t = t.getCause();
        } while (t != null);
        return node;
    }

}
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