Updated Wake on lan

src/main/java/org/fogbowcloud/green/server/communication/ServerCommunicationComponent.java

@@ -3,6 +3,7 @@ package org.fogbowcloud.green.server.communication;
 import java.io.IOException;
 import java.util.Properties;
 
+import org.apache.log4j.Logger;
 import org.fogbowcloud.green.server.core.greenStrategy.GreenStrategy;
 import org.jamppa.component.XMPPComponent;
 import org.xmpp.packet.IQ;
@@ -10,6 +11,7 @@ import org.xmpp.packet.IQ.Type;
 
 public class ServerCommunicationComponent extends XMPPComponent {
 
+	private static final Logger LOGGER = Logger.getLogger(ServerCommunicationComponent.class);
 	private GreenStrategy gs;
 	private Properties prop;
 
@@ -22,10 +24,14 @@ public class ServerCommunicationComponent extends XMPPComponent {
 		addHandlers();
 	}
 
-	public void wakeUpHost(String macAddress) throws IOException {
+	public void wakeUpHost(String macAddress) throws IOException, InterruptedException {
+		LOGGER.debug("Wake command: powerwake -b " + 
+				prop.getProperty("wol.broadcast.address") + " " + macAddress);
+		
 		ProcessBuilder pb = new ProcessBuilder("powerwake", "-b",
 				prop.getProperty("wol.broadcast.address"), macAddress);
-		pb.start();
+		Process process = pb.start();
+		process.waitFor();
 	}
 
 	public void sendIdleHostToBed(String hostJID) {