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Sample of consumer looking for a producer and getting new measures

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package fr.velossity.sample.device.impl;

import java.util.Collection;
import java.util.Iterator;

import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;

import fr.velossity.sample.device.Device;
import fr.velossity.sample.device.Measurement;

/**
 * A simple consumer displaying a device measurements.
 * @author C. Saint-Marcel
 * 
 */
public class Consumer implements Runnable {

	/**
	 * Thread.
	 */
	private Thread measureGetter;
	
	/**
	 * The bundle context.
	 */
	private BundleContext myContext;
	
	

	/**
	 */
	public void activate(BundleContext context) throws Exception {
		myContext = context;
		if(measureGetter == null) {
			measureGetter = new Thread(this);
			measureGetter.start();
		}

	}

	/**
	 */
	public void deactivate(BundleContext context) throws Exception {
		measureGetter = null;
	}
	
	/**
	 * @see Runnable#run()
	 */
	public void run() {
		Thread mg = measureGetter;
		while (measureGetter == mg) {	
			try {
				// REQUESTS Device with name "producer1"
				Collection> sr = myContext.getServiceReferences(Device.class, "(identifier=producer1*)");
				if (sr != null) {
					Iterator> it = sr.iterator();
					if (it.hasNext()) {
						// BINDS to the device
						Device myDevice = myContext.getService(it.next());
						// INVOKES the service
						newMeasure(myDevice.getLastMeasure());
					}
				}
			} catch (InvalidSyntaxException e) {
				e.printStackTrace();
			}
			try {
				synchronized (this) {
					wait(10000);	
				}				
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * Just echoing the measurement to the console.
	 */
	private void newMeasure(final Measurement measurement) {
		if(measurement != null) { // It can be null if the Producer service is declared before setting the measurement
			System.out.println("New measure [" + measurement.getSource().getIdentifier() + "]= " + measurement.getValue() + " " + measurement.getUnit());
		}
	}

}