messaging-system

I am looking for c# delegate version of this Manager using UnityEvent. I don't want to use this because UnityEvent is slower than C# event at most time.

Any clue on how to implement this?

Hello, you see here a screenshot of the table-structure, which I want to extract information from. It is a table from a messaging-system.

Two users, which write each other messages get a unique msgconv id.

Now, I would like to get the latest msg from each msgconv where a specific user is involved in, but the msg is not allowed to be deleted by the specific user.

This is my query at the moment:

I am using ionic3 to build a hybrid app and use this fcm push notification cordova plugin for receiving notification

I have been able to achieve the notifications landing on the device and app being triggered (with data like title, body, custom, etc.)

But whenever the notification is delivered the notification icon is displayed as android bot. like

My Launcher icon is a different icon, which works fine

To initiate the notification, I send a curl request to https://fcm.googleapis.com/fcm/send with the following json:

So I have integrated Firebase Cloud Messaging in my Qt application and I am trying to set a custom icon for notifications (which by default displays a grayed out circle). I know that this question has been asked here before Notification Icon with the new Firebase Cloud Messaging system. Now I have followed the suggestions in the post (and other similar posts). In my manifest file I have added:

I've followed this awesome tutorial by Dana Mulder on how to write a simple messaging service in rails. For example the "Messege read" function.

if you access a message it should write the value of message.read from false to true but it doesn't. I've searched the web on how to assign values through the controller but none worked.

Unfortunately it's not possible just to @message.last.read = true;. I think its a key feature to be able to show users at every time if they got an unread message and to highlight them.

Do you have experiences with Dana Mulder's attempt on how to write a messenger and know the answer to this?

I'm new to database design and wanted to try doing a simple chat web app to practice the skill.

I'm trying to make a Messenger.com like chat application where users can send messages to contacts and groups.

I found this nice tutorial but I'm having a problem with my "messages" table: http://www.vertabelo.com/blog/technical-articles/database-model-for-a-messaging-system

The idea was, that when a message is sent to a user the "reciever_group_id" is NULL and when a message is sent to a group the "reciever_user_id" is NULL. However, postgres won't let add a message to the Messages table, because the foreign keys cannot be NULL, that is it violates the NOT-NULL constraint for reciever_user_id OR reciever_group_id.

Any tips?

Unity share differents assets/script to use VR. I try to develop a simple experience to improve my knowledge of the differents Unity features but I'm in trouble with a call to an event.

In the script MenuButton.cs you can subscribe to an OnButtonSelected event but I don't know how :

MenuButton.cs

So I created a custom message system based on https://www.sitepoint.com/build-a-messaging-system-with-rails-and-actioncable/

It worked great until I encountered a bug where it could not create new conversations properly. (Conversation is named insconversation in my code)

I am making a publish/subscribe typical application where a publisher sends messages to a consumer.

The publisher and the consumer are on different machines and the connection between them can break occasionally.

The goal here is to make sure that no matter what happens to the connection, or to the machines themselves, a message sent by a publisher is always received by the consumer.

Ordering of messages is not a must.

According to my research, RabbitMQ is the right choice for this scenario:

• Redis Vs RabbitMQ as a data broker/messaging system in between Logstash and elasticsearch

However, although RabbitMQ has a tutorial about publish and subscriber this tutorial does not present us to persistent queues nor does it mention confirms which I believe are the key to making sure messages are delivered.

On the other hand, Redis is also capable of doing this:

• http://abhinavsingh.com/customizing-redis-pubsub-for-message-persistence-part-2/

but I couldn't find any official tutorials or examples and my current understatement leads to me to believe that persistent queues and message confirms must be done by us, as Redis is mainly an in memory-datastore instead of a message broker like RabbitMQ.

1. For this use case, which solution would be the easiest to implement? (Redis solution or RabbitMQ solution?)
2. Please provide a link to an example with what you think would be best!