How to keep the TCP client connected with TCP server forever

[Shaheer Thooppil]

Hi all,

I am creating a chat application. In the client section i would like to keep the connection alive throughout the life of the application. 

The Client need to reconnect to the server automatically when the server is restarted or when ever the server is up and running. 

How i can achieve this using vertx NetClient

Any Samples? Thanks in advance.

[Alexander Lehmann]

Do you mean a browser/server type chat? In this case, take a look at websockets and sockjs.

If you mean server/server communication like a service bus, the easiest solution is probably to use one or you will have to implement the functionality yourself (ping packets, retries etc).

[Tim Fox]

NetClient can handle reconnect, please take a look at the docs for more info.

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[Shaheer Thooppil]

Hi Tim

I have  tried like this

NetClient client = vertx.createNetClient();

client.setReconnectAttempts(1000);

client.setReconnectInterval(500);

But when i restarted the server, the client is not reconnecting.

[Tim Fox]

Do you have a reproducer?

[Shaheer Thooppil]

Please find the attached file.

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[Tim Fox]

Ah right. reconnectAttempts is how many attempts to make when connecting to the server, it doesn't mean the client will automatically reconnect itself.

To do that you need to specify closeHandler/exceptionHandler and do the reconnect yourself.

[Shaheer Thooppil]

 That is what i m looking for.. What code i should write to reconnect?

Is there any method like socket.reconnect() some thing like that. Which i can call inside closeHandler like:

socket.closeHandler(new VoidHandler() {

@Override

protected void handle() {

log.info("Server Disconneted ");

socket.reconnect();

}

});