Added ContactOperationProcessor for the ADD operation

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

@@ -180,6 +180,15 @@ public class PersistenceManager {
 		return entityManager.createNamedQuery("searchUsers").setParameter("searchPhrase", searchPhrase + "%").getResultList();
 	}
 
+	public void addContact(long userId, long contactId) {
+		User	c1	= getUserById(userId);
+		User	c2	= getUserById(contactId);
+		c1.getContacts().add(c2);
+		c2.getContacts().add(c1);
+		updateUser(c1);
+		updateUser(c2);
+	}
+
 	/**
 	 * @param user the User whose contacts should be retrieved
 	 * @return the contacts of this User - currently everyone using Envoy

src/main/java/envoy/server/processors/ContactOperationProcessor.java

@@ -0,0 +1,33 @@
+package envoy.server.processors;
+
+import java.io.IOException;
+
+import envoy.event.ContactOperation;
+import envoy.event.ContactOperation.Operation;
+import envoy.server.ConnectionManager;
+import envoy.server.ObjectProcessor;
+import envoy.server.database.PersistenceManager;
+import envoy.server.net.ObjectWriteProxy;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>ContactOperationProcessor.java</strong><br>
+ * Created: <strong>08.02.2020</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Server Standalone v0.1-alpha
+ */
+public class ContactOperationProcessor implements ObjectProcessor<ContactOperation> {
+
+	@Override
+	public void process(ContactOperation operation, long socketId, ObjectWriteProxy writeProxy) throws IOException {
+		if (operation.getOperationType() == Operation.ADD) {
+			long userId = ConnectionManager.getInstance().getUserIdBySocketId(socketId);
+			System.out.printf("Adding user %s to the contact list of user %d", operation.get(), userId);
+			PersistenceManager.getPersistenceManager().addContact(userId, operation.get().getId());
+		}
+	}
+
+	@Override
+	public Class<ContactOperation> getInputClass() { return ContactOperation.class; }
+}