Implemented AddContact mechanism on the server

(currently unfinished an not working see stack trace for current
problem)

src/main/java/envoy/server/Startup.java

@@ -10,6 +10,7 @@ import envoy.server.data.ConfigItem;
 import envoy.server.database.PersistenceManager;
 import envoy.server.net.ObjectMessageProcessor;
 import envoy.server.net.ObjectMessageReader;
+import envoy.server.processors.ContactOperationProcessor;
 import envoy.server.processors.ContactsRequestProcesor;
 import envoy.server.processors.IdGeneratorRequestProcessor;
 import envoy.server.processors.LoginCredentialProcessor;
@@ -44,6 +45,7 @@ public class Startup {
 		processors.add(new UserStatusChangeProcessor());
 		processors.add(new IdGeneratorRequestProcessor());
 		processors.add(new ContactsRequestProcesor());
+		processors.add(new ContactOperationProcessor());
 		Server server = new Server(8080, () -> new ObjectMessageReader(), new ObjectMessageProcessor(processors));
 
 		initializeCurrentMessageId();

src/main/java/envoy/server/data/User.java

@@ -3,7 +3,17 @@ package envoy.server.data;
 import java.util.Date;
 import java.util.List;
 
-import javax.persistence.*;
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 
 /**
  * This class serves as a way to let Hibernate communicate with the server

src/main/java/envoy/server/database/PersistenceManager.java

@@ -194,7 +194,9 @@ public class PersistenceManager {
 	 * @return the contacts of this User - currently everyone using Envoy
 	 * @since Envoy Server Standalone v0.1-alpha
 	 */
-	public List<User> getContacts(User user) { return entityManager.createQuery("FROM User").getResultList(); }
+	public List<User> getContacts(User user) {
+		return entityManager.createNamedQuery("getContactsOfUser").setParameter("user", user).getResultList();
+	}
 	// TODO current solution gets all users, not just contacts. Should be changed to
 	// entityManager.createNamedQuery("getContactsOfUser").setParameter("user",
 	// user).getResultList();