messaging

I followed the suggestions from user ehp in order to build a lightweight messaging-system: https://stackoverflow.com/a/18717864/1084315 Users: id | username Messages: id | from | content user_messages: user_id | message_id class User extends Eloquent { public function messages() { return $this->belongsToMany('Message'); } public function sent_messages() { return $this->hasMany('Messages', 'from'); } } class Message extends Eloquent { public function from() { return $this->belongsTo('User', 'from'); } public function to() { return $this->belongsToMany('User'); } } I create a message like this:

Is it possible to send message using the WhatsApp server to a WhatsApp group, inside my own application and without opening the WhatsApp app? Also please help me regarding the history of WhatsApp contact chat. in short NO Reason: because (at least to my knowledge) Whatsapp does not allows the same. i.e. no external events or APIs to implement the same. So you have to at least use the intents and let the user handle the rest. Also please help me regarding the history of WhatsApp contact chat. This also can't be done (using ethical approach) because all the chat history is stored in a private

i am new to jms and activemq. i produce one message to one static queue in activemq and get reply back to temporary queue using getJMSReplyTo. the code is following ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); // Create a Connection Connection connection = connectionFactory.createConnection(); connection.start(); // Create a Session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // Create the destination (Topic or Queue) Destination destination = (Destination) session.createQueue("PostWithParameter_Queue");

Is there a relatively simple way that my VB.NET application can be notified of the fact that a new value has been written to a table in SQL Server Express 2008? Polling is not an option since I'd need to do that every 10 seconds nonstop. Take a look at having your application subscribe to Query Notifications . Also Using Query Notifications in .NET 2.0 to handle ad-hoc data refreshes 来源： https://stackoverflow.com/questions/6617278/how-can-sqlserver-notify-a-vb-net-application-of-an-event

Ok, I'm trying to base something similar off of this, but not quite getting it nailed: GROUP BY and ORDER BY Basically, wanting a query to find the latest messages in each 'thread' between the current logged-in user and any other users, but via a flat (non-'threaded') table of messages: messages { id, from_uid, to_uid, message_text, time_added } Assuming the current user's uid is '1', and the latest message in each 'thread' could either be from that user, or to that user (the other party always denoted by thread_recipient): SELECT a.*,thread_recipient FROM messages a JOIN (SELECT IF(from_uid =

I have a C# app that subscribes to a topic on our messaging system for value updates. When a new value comes in, I do some processing and then carry on. The problem is, the updates can come faster than the app can process them. What I want to do is to just hold on to the latest value, so I don't want a queue. For example, the source publishes value "1" and my app receives it; while processing, the source publishes the sequence (2, 3, 4, 5) before my app is done processing; my app then processes value "5", with the prior values thrown away. It's kind of hard to post a working code sample since

Different event types are discriminated by some combination of topics/queues and message headers. In Kafka, record streams are still separated out as topics ( https://kafka.apache.org/intro ). In going through the Azure Event Hubs documentation, I do not see any such idea called out. There are partitions, but these are related to consumer parallelism ( https://docs.microsoft.com/en-us/azure/event-hubs/event-hubs-what-is-event-hubs#partitions ), according to the documentation. Is the idea that you would one namespace in Azure Event Hubs, which contains an Event Hub for each "topic"? Yes. I