use unique hazelcast name

#613

src/main/java/de/metas/ui/web/config/HazelcastHttpSessionConfig.java

@@ -1,5 +1,9 @@
 package de.metas.ui.web.config;
 
+import java.util.UUID;
+
+import org.adempiere.util.net.IHostIdentifier;
+import org.adempiere.util.net.NetUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Profile;
@@ -25,11 +29,11 @@
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public
- * License along with this program.  If not, see
+ * License along with this program. If not, see
  * <http://www.gnu.org/licenses/gpl-2.0.html>.
  * #L%
  */
@@ -48,6 +52,19 @@ public HazelcastHttpSessionConfig()
 	public HazelcastInstance embeddedHazelcast()
 	{
 		final Config hazelcastConfig = new Config();
+		hazelcastConfig.getGroupConfig().setName(generateGroupName());
 		return Hazelcast.newHazelcastInstance(hazelcastConfig);
 	}
+
+	private static final String generateGroupName()
+	{
+		final IHostIdentifier localhost = NetUtils.getLocalHost();
+		String hostname = localhost.getHostName();
+		if (hostname == null)
+		{
+			hostname = localhost.getIP();
+		}
+
+		return hostname + "-webapi-" + UUID.randomUUID();
+	}
 }