Juraj Tomasov [https://community.jboss.org/people/jtomasov] created the discussion
"Re: Snowdrop and JBoss AS 7.2.0"
To view the discussion, visit: https://community.jboss.org/message/790006#790006
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The reason of incompatibility Snowdrop subsystem with JBoss AS 7.2.0.Alpha1-SNAPSHOT is the fact ExtensionContext registerSubsystem methods have changed.
Changes needed to make Snowdrop subsystem can be registered in JBoss AS 7.1.3 onwards are as follows:
1. In snowdrop-parent.pom change
<version.org.jboss.as7>7.1.3.Final</version.org.jboss.as7>
2. amend org.jboss.spring.deployers.as7.SpringExtension class
/*
* 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 http://www.fsf.org.
*/
package org.jboss.spring.deployers.as7;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.ADD;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.DESCRIBE;
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.SUBSYSTEM;
import java.util.List;
import java.util.Locale;
import javax.xml.stream.XMLStreamException;
import org.jboss.as.controller.Extension;
import org.jboss.as.controller.ExtensionContext;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.SubsystemRegistration;
import org.jboss.as.controller.descriptions.DescriptionProvider;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.descriptions.common.CommonDescriptions;
import org.jboss.as.controller.parsing.ExtensionParsingContext;
import org.jboss.as.controller.parsing.ParseUtils;
import org.jboss.as.controller.persistence.SubsystemMarshallingContext;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.OperationEntry;
import org.jboss.dmr.ModelNode;
import org.jboss.logging.Logger;
import org.jboss.staxmapper.XMLElementReader;
import org.jboss.staxmapper.XMLElementWriter;
import org.jboss.staxmapper.XMLExtendedStreamReader;
import org.jboss.staxmapper.XMLExtendedStreamWriter;
/**
* @author Marius Bogoevici
*/
public class SpringExtension implements Extension {
   private static final Logger log = Logger.getLogger("org.jboss.snowdrop");
   public static final String SUBSYSTEM_NAME = "spring";
   public static final String NAMESPACE = "urn:jboss:domain:snowdrop:1.0";
*private static final int MANAGEMENT_API_MAJOR_VERSION = 1;*
*Â Â Â private static final int MANAGEMENT_API_MINOR_VERSION = 2;*
*Â Â Â private static final int MANAGEMENT_API_MICRO_VERSION = 0;*
   private static SpringSubsystemElementParser parser = new SpringSubsystemElementParser();
   private static final DescriptionProvider SUBSYSTEM_ADD_DESCRIPTION = new DescriptionProvider() {
       @Override
       public ModelNode getModelDescription(Locale locale) {
           return SpringDescriptionProviders.getSubsystemAddDescription(locale);
       }
   };
   static final DescriptionProvider SUBSYSTEM_DESCRIPTION = new DescriptionProvider() {
       @Override
       public ModelNode getModelDescription(Locale locale) {
           return SpringDescriptionProviders.getSubsystemDescription(locale);
       }
   };
   private static ModelNode createAddSubSystemOperation() {
       final ModelNode subsystem = new ModelNode();
       subsystem.get(OP).set(ADD);
       subsystem.get(OP_ADDR).add(ModelDescriptionConstants.SUBSYSTEM, SUBSYSTEM_NAME);
       return subsystem;
   }
   public void initialize(ExtensionContext context) {
       log.debug("Activating Spring Extension");
*final SubsystemRegistration subsystem = context.registerSubsystem(SUBSYSTEM_NAME,MANAGEMENT_API_MAJOR_VERSION,MANAGEMENT_API_MINOR_VERSION,MANAGEMENT_API_MICRO_VERSION);*
       final ManagementResourceRegistration registration = subsystem.registerSubsystemModel(SUBSYSTEM_DESCRIPTION);
       registration.registerOperationHandler(ADD, SpringSubsystemAdd.INSTANCE, SUBSYSTEM_ADD_DESCRIPTION, false);
       registration.registerOperationHandler(DESCRIBE, SpringSubsystemDescribeHandler.INSTANCE, SpringSubsystemDescribeHandler.INSTANCE, false, OperationEntry.EntryType.PRIVATE);
       subsystem.registerXMLElementWriter(parser);
   }
   public void initializeParsers(ExtensionParsingContext context) {
       log.debug("Setting up parsers");
       context.setSubsystemXmlMapping(NAMESPACE, parser);
   }
   static class SpringSubsystemElementParser implements XMLElementReader<List<ModelNode>>,
           XMLElementWriter<SubsystemMarshallingContext> {
       /**
        * {@inheritDoc}
        */
       @Override
       public void readElement(XMLExtendedStreamReader reader, List<ModelNode> list) throws XMLStreamException {
           ParseUtils.requireNoAttributes(reader);
           ParseUtils.requireNoContent(reader);
           final ModelNode update = new ModelNode();
           update.get(OP).set(ADD);
           update.get(OP_ADDR).add(SUBSYSTEM, SUBSYSTEM_NAME);
           list.add(createAddSubSystemOperation());
       }
       private static ModelNode createAddSubSystemOperation() {
           final ModelNode subsystem = new ModelNode();
           subsystem.get(OP).set(ADD);
           subsystem.get(OP_ADDR).add(ModelDescriptionConstants.SUBSYSTEM, SUBSYSTEM_NAME);
           return subsystem;
       }
       /**
        * {@inheritDoc}
        */
       @Override
       public void writeContent(final XMLExtendedStreamWriter writer, final SubsystemMarshallingContext context) throws
               XMLStreamException {
           //TODO seems to be a problem with empty elements cleaning up the queue in FormattingXMLStreamWriter.runAttrQueue
           context.startSubsystemElement(NAMESPACE, false);
           writer.writeEndElement();
       }
   }
   private static class SpringSubsystemDescribeHandler implements OperationStepHandler, DescriptionProvider {
       static final SpringSubsystemDescribeHandler INSTANCE = new SpringSubsystemDescribeHandler();
       @Override
       public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
           context.getResult().add(createAddSubSystemOperation());
           context.completeStep();
       }
       @Override
       public ModelNode getModelDescription(Locale locale) {
           return CommonDescriptions.getSubsystemDescribeOperation(locale);
       }
   }
}
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