Include hostGroup in DAO

to enable easy filtering for postprocessing without relying on host IDs

src/de/tud/kom/p2psim/impl/util/db/dao/metric/HostMetricDAO.java

@@ -54,12 +54,12 @@ public class HostMetricDAO extends DAO {
 			if (hostId != -1) {
 				List<SimHost> allPeers = GlobalOracle.getHosts();
 				for (SimHost h : allPeers) {
-					HostMetric hostMetric = new HostMetric(metric, h.getHostId());
+					HostMetric hostMetric = new HostMetric(metric, h.getHostId(), h.getProperties().getGroupID());
 					metricMap.put(h.getHostId(), hostMetric);
 					addToPersistQueue(hostMetric);
 				}
 			} else{
-				HostMetric hostMetric = new HostMetric(metric, hostId);
+				HostMetric hostMetric = new HostMetric(metric, hostId, "__GLOBAL__");
 				metricMap.put(hostId, hostMetric);
 				addToPersistQueue(hostMetric);
 			}

src/de/tud/kom/p2psim/impl/util/db/metric/HostMetric.java

 package de.tud.kom.p2psim.impl.util.db.metric;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
@@ -28,6 +29,12 @@ public class HostMetric {
 	private int id;
 
 	private long hostId;
+	
+	/**
+	 * GroupName of the host
+	 */
+	@Column(length = 1023)
+	private String groupName;
 
 	@ManyToOne
 	@JoinColumn(name = "metricId")
@@ -37,9 +44,10 @@ public class HostMetric {
 
     }
 
-	public HostMetric(Metric metric, long hostId) {
+	public HostMetric(Metric metric, long hostId, String groupName) {
 		this.metric = metric;
 		this.hostId = hostId;
+		this.groupName = groupName;
 	}
 	
 	public long getHostId() {