/jboss-as-7.1.1.Final/osgi/service/src/main/java/org/jboss/as/osgi/parser/StartLevelHandler.java

 1/*
 2 * JBoss, Home of Professional Open Source.
 3 * Copyright 2011, 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 */
22package org.jboss.as.osgi.parser;
23
24import org.jboss.as.controller.OperationContext;
25import org.jboss.as.controller.OperationFailedException;
26import org.jboss.as.controller.OperationStepHandler;
27import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
28import org.jboss.dmr.ModelNode;
29import org.jboss.msc.service.ServiceController;
30import org.jboss.osgi.framework.Services;
31import org.osgi.service.startlevel.StartLevel;
32
33/**
34 * Handles the framework start level.
35 *
36 * @author David Bosschaert
37 */
38abstract class StartLevelHandler implements OperationStepHandler {
39    static final StartLevelHandler READ_HANDLER = new StartLevelHandler() {
40        @Override
41        void invokeOperation(StartLevel sls, OperationContext context, ModelNode operation) {
42            int sl = sls.getStartLevel();
43            context.getResult().set(sl);
44        }
45    };
46
47    static final StartLevelHandler WRITE_HANDLER = new StartLevelHandler() {
48        @Override
49        void invokeOperation(StartLevel sls, OperationContext context, ModelNode operation) {
50            int targetStartLevel = operation.require(ModelDescriptionConstants.VALUE).asInt();
51            sls.setStartLevel(targetStartLevel);
52        }
53    };
54
55    @Override
56    public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
57        ServiceController<?> svc = context.getServiceRegistry(false).getRequiredService(Services.START_LEVEL);
58
59        if (svc == null || svc.getState() != ServiceController.State.UP) {
60            // non-metric read-attribute handlers should not fail
61            // OSGiMessages.MESSAGES.osgiSubsystemNotActive()
62            context.getResult().set(new ModelNode());
63        } else {
64            StartLevel sls = (StartLevel) svc.getValue();
65            invokeOperation(sls, context, operation);
66        }
67
68        context.completeStep();
69    }
70
71    abstract void invokeOperation(StartLevel sls, OperationContext context, ModelNode operation);
72}