NodeTrackerService.java

/*
 * JBoss, Home of Professional Open Source.
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 * 
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */
package org.teiid.jboss;

import java.util.concurrent.ScheduledExecutorService;

import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
import org.teiid.runtime.NodeTracker;
import org.wildfly.clustering.jgroups.ChannelFactory;

class NodeTrackerService implements Service<NodeTracker> {
    public final InjectedValue<ChannelFactory> channelFactoryInjector = new InjectedValue<ChannelFactory>();
    private NodeTracker tracker = null;
    private String nodeName;
    private ScheduledExecutorService scheduler;
    
    public NodeTrackerService(String nodeName, ScheduledExecutorService scheduler) {
        this.nodeName = nodeName;
        this.scheduler = scheduler;
    }
    
	@Override
	public void start(StartContext context) throws StartException {
	    try {
            this.tracker = new NodeTracker(channelFactoryInjector.getValue().createChannel("teiid-node-tracker"), this.nodeName) {
                @Override
                public ScheduledExecutorService getScheduledExecutorService() {
                    return scheduler;
                }
            };
        } catch (Exception e) {
            throw new StartException(e);
        } 
	}

	@Override
	public void stop(StopContext context) {
	    this.tracker = null;
	}
	
	@Override
	public NodeTracker getValue() throws IllegalStateException,IllegalArgumentException {
	    return this.tracker;
	}
}