/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, 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.clustering.jgroups.subsystem;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.jboss.as.clustering.jgroups.ProtocolDefaults;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jgroups.conf.ProtocolStackConfigurator;
import org.jgroups.conf.XmlConfigurator;
import static org.jboss.as.clustering.jgroups.JGroupsLogger.ROOT_LOGGER;
import static org.jboss.as.clustering.jgroups.JGroupsMessages.MESSAGES;
/**
* Service that provides protocol property defaults per protocol type.
* @author Paul Ferraro
*/
public class ProtocolDefaultsService implements Service<ProtocolDefaults> {
public static final ServiceName SERVICE_NAME = ServiceName.JBOSS.append(JGroupsExtension.SUBSYSTEM_NAME, "defaults");
private static final String DEFAULTS = "jgroups-defaults.xml";
private final String resource;
private volatile ProtocolDefaults defaults;
public ProtocolDefaultsService() {
this(DEFAULTS);
}
public ProtocolDefaultsService(String resource) {
this.resource = resource;
}
/**
* {@inheritDoc}
* @see org.jboss.msc.value.Value#getValue()
*/
@Override
public ProtocolDefaults getValue() {
return this.defaults;
}
/**
* {@inheritDoc}
* @see org.jboss.msc.service.Service#start(org.jboss.msc.service.StartContext)
*/
@Override
public void start(StartContext context) throws StartException {
ProtocolStackConfigurator configurator = load(this.resource);
Defaults defaults = new Defaults();
for (org.jgroups.conf.ProtocolConfiguration config: configurator.getProtocolStack()) {
defaults.add(config.getProtocolName(), config.getProperties());
}
this.defaults = defaults;
}
private static ProtocolStackConfigurator load(String resource) throws StartException {
URL url = find(resource, JGroupsExtension.class.getClassLoader());
ROOT_LOGGER.debugf("Loading JGroups protocol defaults from %s", url.toString());
try {
return XmlConfigurator.getInstance(url);
} catch (IOException e) {
throw new StartException(MESSAGES.parserFailure(url));
}
}
private static URL find(String resource, ClassLoader... loaders) throws StartException {
for (ClassLoader loader: loaders) {
if (loader != null) {
URL url = loader.getResource(resource);
if (url != null) {
return url;
}
}
}
throw new StartException(MESSAGES.notFound(resource));
}
/**
* {@inheritDoc}
* @see org.jboss.msc.service.Service#stop(org.jboss.msc.service.StopContext)
*/
@Override
public void stop(StopContext context) {
this.defaults = null;
}
static class Defaults implements ProtocolDefaults {
private final Map<String, Map<String, String>> map = new HashMap<String, Map<String, String>>();
void add(String protocol, Map<String, String> properties) {
this.map.put(protocol, Collections.unmodifiableMap(properties));
}
/**
* {@inheritDoc}
* @see org.jboss.as.clustering.jgroups.ProtocolDefaults#getProperties(java.lang.String)
*/
@Override
public Map<String, String> getProperties(String protocol) {
Map<String, String> properties = this.map.get(protocol);
return (properties != null) ? Collections.unmodifiableMap(properties) : Collections.<String, String>emptyMap();
}
}
}