Now wakeUpHosts throws exceptions.

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

@@ -3,7 +3,6 @@ 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;
@@ -11,8 +10,6 @@ import org.xmpp.packet.IQ.Type;
 
 public class ServerCommunicationComponent extends XMPPComponent {
 
-	private static final Logger LOGGER = Logger
-			.getLogger(ServerCommunicationComponent.class);
 	private GreenStrategy gs;
 
 	public ServerCommunicationComponent(Properties prop, GreenStrategy gs) {
@@ -23,13 +20,9 @@ public class ServerCommunicationComponent extends XMPPComponent {
 		addHandlers();
 	}
 
-	public void wakeUpHost(String macAddress) {
-		try {
-			ProcessBuilder pb = new ProcessBuilder("powerwake", macAddress);
-			pb.start();
-		} catch (IOException e) {
-			LOGGER.warn("It was not possible to wake " + macAddress + e);
-		}
+	public void wakeUpHost(String macAddress) throws IOException {
+		ProcessBuilder pb = new ProcessBuilder("powerwake", macAddress);
+		pb.start();
 	}
 
 	public void sendIdleHostToBed(String hostJID) {

src/main/java/org/fogbowcloud/green/server/core/greenStrategy/DefaultGreenStrategy.java

 package org.fogbowcloud.green.server.core.greenStrategy;
 
+import java.io.IOException;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
@@ -219,22 +220,30 @@ public class DefaultGreenStrategy implements GreenStrategy {
 
 	public void wakeUpSleepingHost(int minCPU, int minRAM) {
 		Host host = this.sleepingHosts.peek();
+		try {
+			if (host.getAvailableCPU() < minCPU) {
+				LOGGER.info("Tried to wake hosts but no hosts were found");
+				return;
+			}
+			if (host.getAvailableRAM() >= minRAM) {
+				this.scc.wakeUpHost(host.getName());
+				this.sleepingHosts.remove(host);
+				LOGGER.info("Waked " + host);
+			}
 
-		if (host.getAvailableCPU() < minCPU) {
-			return;
-		}
-		if (host.getAvailableRAM() >= minRAM) {
-			this.scc.wakeUpHost(host.getName());
-			this.sleepingHosts.remove(host);
+		} catch (IOException e) {
+			LOGGER.warn("It was not possible to wake " + host +
+					"it may be lost or there is a network problem" + e);
 		}
 	}
-
+	
 	public void start() {
 		executorVerifyLastTimeSeen.scheduleWithFixedDelay(new Runnable() {
 			@Override
 			public void run() {
 				checkHostsLastSeen();
-				LOGGER.info("Checked when hosts were seen");
+				LOGGER.info("Checked when hosts were seen"
+						+ " Lost Hosts now");
 			}
 		}, 0, lostHostTime, TimeUnit.MILLISECONDS);
 
@@ -242,7 +251,8 @@ public class DefaultGreenStrategy implements GreenStrategy {
 			@Override
 			public void run() {
 				sendIdleHostsToBed();
-				LOGGER.info("Sent idle hosts to bed");
+				LOGGER.info("Sent idle hosts to bed: "
+						+ "Sleeping Hosts now "+sleepingHosts);
 			}
 		}, 0, sleepingTime, TimeUnit.MILLISECONDS);
 	}

src/test/java/org/fogbowcloud/green/server/core/greenStrategy/TestDefaultGreenStrategy.java

 package org.fogbowcloud.green.server.core.greenStrategy;
 
+import java.io.IOException;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
@@ -109,7 +110,12 @@ public class TestDefaultGreenStrategy {
 		Date date = this.createDateMock(3600001);
 		ServerCommunicationComponent gscc = Mockito
 				.mock(ServerCommunicationComponent.class);
-		Mockito.doNothing().when(gscc).wakeUpHost(h1.getMacAddress());
+		try {
+			Mockito.doNothing().when(gscc).wakeUpHost(h1.getMacAddress());
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
 		OpenStackInfoPlugin osip = this.createOpenStackInfoPluginMock(hosts);
 		DefaultGreenStrategy dgs = new DefaultGreenStrategy(osip, 1800000);
 		dgs.setDate(date);
@@ -170,10 +176,15 @@ public class TestDefaultGreenStrategy {
 		dgs.setDate(date);
 		ServerCommunicationComponent gscc = Mockito
 				.mock(ServerCommunicationComponent.class);
-		Mockito.doNothing().when(gscc).wakeUpHost("wake");
-		Mockito.doNothing().when(gscc).wakeUpHost(mustWake.getMacAddress());
-		Mockito.doNothing().when(gscc).wakeUpHost(stilSleep.getMacAddress());
-		Mockito.doNothing().when(gscc).wakeUpHost(stilSleep2.getMacAddress());
+		try {
+			Mockito.doNothing().when(gscc).wakeUpHost("wake");
+			Mockito.doNothing().when(gscc).wakeUpHost(mustWake.getMacAddress());
+			Mockito.doNothing().when(gscc).wakeUpHost(stilSleep.getMacAddress());
+			Mockito.doNothing().when(gscc).wakeUpHost(stilSleep2.getMacAddress());
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
 
 		dgs.setCommunicationComponent(gscc);
 		dgs.sendIdleHostsToBed();
@@ -215,7 +226,12 @@ public class TestDefaultGreenStrategy {
 		Date date = this.createDateMock(3600001);
 		ServerCommunicationComponent gscc = Mockito
 				.mock(ServerCommunicationComponent.class);
-		Mockito.doNothing().when(gscc).wakeUpHost("wake");
+		try {
+			Mockito.doNothing().when(gscc).wakeUpHost("wake");
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
 		OpenStackInfoPlugin osip = this.createOpenStackInfoPluginMock(hosts);
 
 		DefaultGreenStrategy dgs = new DefaultGreenStrategy(osip, 1800000);