Activator for mystats example with OpenDaylight

mystats-activator.java

package com.example.mystats;


import org.apache.felix.dm.Component;
import org.opendaylight.controller.sal.core.ComponentActivatorAbstractBase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Activator extends ComponentActivatorAbstractBase {
    protected static final Logger logger = LoggerFactory
            .getLogger(Activator.class);

    public void init() {
    }

    public void destroy() {
    }

    public Object[] getImplementations() {
        Object[] res = { MyStats.class };
        return res;
    }

    public void configureInstance(Component c, Object imp, String containerName) {
        if (imp.equals(MyStats.class)) {
            // export the service
            c.setInterface(new String[] { MyStats.class.getName() },
                    null);

        }
    }
}

MyStats.java

package com.example.mystats;

import org.opendaylight.controller.sal.core.Node;
import org.opendaylight.controller.sal.match.MatchType;
import org.opendaylight.controller.sal.reader.FlowOnNode;
import org.opendaylight.controller.sal.utils.ServiceHelper;
import org.opendaylight.controller.statisticsmanager.IStatisticsManager;
import org.opendaylight.controller.switchmanager.ISwitchManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Simple bundle to grab some statistics
 * Fred Hsu
 */
public class MyStats{
	private static final Logger log = LoggerFactory
			.getLogger(MyStats.class);

	public MyStats() {

	}

	void init() {
		log.debug("INIT called!");
	}

	void destroy() {
		log.debug("DESTROY called!");
	}

	void start() {
		log.debug("START called!");
		getFlowStatistics();
	}

	void stop() {
		log.debug("STOP called!");
	}

	void getFlowStatistics() {
		String containerName = "default";
		IStatisticsManager statsManager = (IStatisticsManager) ServiceHelper
				.getInstance(IStatisticsManager.class, containerName, this);

		ISwitchManager switchManager = (ISwitchManager) ServiceHelper
				.getInstance(ISwitchManager.class, containerName, this);

		for (Node node : switchManager.getNodes()) {
			System.out.println("Node: " + node);
			for (FlowOnNode flow : statsManager.getFlows(node)) {
				System.out.println(" DST: "
						+ flow.getFlow().getMatch().getField(MatchType.NW_DST)
						+ " Bytes: " + flow.getByteCount());
			}
		}
	}
}