/jboss-as-7.1.1.Final/modcluster/src/main/java/org/jboss/as/modcluster/ModClusterAddMetric.java

  1/*
  2 * JBoss, Home of Professional Open Source.
  3 * Copyright 2010, Red Hat, Inc., and individual contributors
  4 * as indicated by the @author tags. See the copyright.txt file in the
  5 * distribution for a full listing of individual contributors.
  6 *
  7 * This is free software; you can redistribute it and/or modify it
  8 * under the terms of the GNU Lesser General Public License as
  9 * published by the Free Software Foundation; either version 2.1 of
 10 * the License, or (at your option) any later version.
 11 *
 12 * This software is distributed in the hope that it will be useful,
 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 15 * Lesser General Public License for more details.
 16 *
 17 * You should have received a copy of the GNU Lesser General Public
 18 * License along with this software; if not, write to the Free
 19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 21 */
 22
 23package org.jboss.as.modcluster;
 24
 25import static org.jboss.as.modcluster.ModClusterMessages.MESSAGES;
 26
 27import java.util.Collections;
 28import java.util.Iterator;
 29import java.util.List;
 30import java.util.Locale;
 31
 32import org.jboss.as.controller.OperationContext;
 33import org.jboss.as.controller.OperationFailedException;
 34import org.jboss.as.controller.OperationStepHandler;
 35import org.jboss.as.controller.PathAddress;
 36import org.jboss.as.controller.descriptions.DescriptionProvider;
 37import org.jboss.dmr.ModelNode;
 38import org.jboss.dmr.Property;
 39
 40// implements ModelQueryOperationHandler, DescriptionProvider
 41public class ModClusterAddMetric implements OperationStepHandler, DescriptionProvider {
 42
 43    static final ModClusterAddMetric INSTANCE = new ModClusterAddMetric();
 44
 45    @Override
 46    public ModelNode getModelDescription(Locale locale) {
 47        return ModClusterSubsystemDescriptions.getAddMetricDescription(locale);
 48    }
 49
 50    @Override
 51    public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
 52
 53        // Look for the dynamic-load-provider
 54        final ModelNode dynamicLoadProvider = context.readResourceForUpdate(PathAddress.EMPTY_ADDRESS).getModel()
 55                .get(CommonAttributes.DYNAMIC_LOAD_PROVIDER);
 56
 57        // Add the metric to the dynamic-load-provider.
 58        final ModelNode metric = new ModelNode();
 59        List<Property> list = operation.asPropertyList();
 60        Iterator<Property> it = list.iterator();
 61        while (it.hasNext()) {
 62            Property prop = it.next();
 63            if (prop.getName().equals("property")) {
 64                String properties = prop.getValue().asString();
 65                ModelNode props = ModelNode.fromString(properties);
 66                metric.get("property").set(props);
 67            } else if (prop.getName().equals("type")) {
 68                metric.get(prop.getName()).set(prop.getValue().asString());
 69            }
 70        }
 71        if (!metric.get("type").isDefined()) {
 72            throw new OperationFailedException(new ModelNode().set(MESSAGES.typeAttributeRequired("add-metric")));
 73        }
 74        if (!dynamicLoadProvider.isDefined()) {
 75            // Create a default one.
 76            dynamicLoadProvider.get(CommonAttributes.HISTORY).set(9);
 77            dynamicLoadProvider.get(CommonAttributes.DECAY).set(2);
 78        }
 79        replaceMetric(dynamicLoadProvider, metric);
 80
 81
 82        if (context.isNormalServer()) {
 83            context.reloadRequired();
 84        }
 85
 86        context.completeStep(new OperationContext.RollbackHandler() {
 87            @Override
 88            public void handleRollback(OperationContext context, ModelNode operation) {
 89                if (context.isNormalServer()) {
 90                    context.revertReloadRequired();
 91                }
 92            }
 93        });
 94    }
 95
 96    private void replaceMetric(ModelNode dynamicLoadProvider, ModelNode metric) {
 97        List<ModelNode> newlist = Collections.<ModelNode> emptyList();
 98        if (dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).isDefined()) {
 99            List<ModelNode> list = dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).asList();
100            String type = metric.get("type").asString();
101            Iterator<ModelNode> it = list.iterator();
102            dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).set(newlist);
103            while (it.hasNext()) {
104                ModelNode node = it.next();
105                if (!node.get("type").asString().equals(type)) {
106                    dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).add(node);
107                }
108            }
109        } else {
110            dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).set(newlist);
111        }
112        dynamicLoadProvider.get(CommonAttributes.LOAD_METRIC).add(metric);
113    }
114}