B4J Question Steaming Server

[Jmu5667]

Hello Everyone !

Can we build a server app using b4J that will allow us to broadcast a a stream of data from one connection to all other connections, preferably without having to loop thru all connections and writing to each one.

Any advice would be gratefully appreciated.

Regards

John

 

[little3399]

Good Idea

 

[Erel]

TCP connections do not support such broadcasting. UDP does support this mode.

How many devices will be connected?

 

[Jmu5667]

Could be up to 200, and it would be bi-directional, both transmit and receive by the connected client.

 

[Erel]

Will they be connected to the same local network (a simple router will not handle 200 devices)?

 

[Jmu5667]

Yes, there will be a wan/lan environment, dedicated PC running the Server App, connections will be made from the client app, either from within the local network or from Outside. This is a real project for our company so I don't want to explicitly say what we are doing, but you know what I mean.

 

[Erel]

You should decide whether you want to use UDP broadcasting or TCP. I'm not sure whether it is possible to implement UDP broadcasting over the internet. The current UDP implementation in Network library doesn't support broadcasting.

I recommend you to start with some tests. You may be able to use TCP with 200 connected devices.

 

[Jmu5667]

Ok, i I use TCP, can I create threads within the server app that can feed off a global data buffer so the servicing is handled by each thread. Do you get my meaning ?

 

[Erel]

Don't use the standard server library. You need a low level server in this case. Maintain a collection of AsyncStreams. Each AsyncStreams object is managed with different thread. See the example here: http://www.b4x.com/android/forum/threads/b4j-cctv-example.34695/#post-203347

 

[Jmu5667]

Thanks Erel, I'll be in touch