I am experimenting with OpenDolphin after a while of being interested in it's concept, I am at the defining requirements phase with some friends for a project we want to make with hopes of earning some money from it this project's concept will be based on a server/multiple-client model where we want the server to have most of the logic, we have average to little experience couple of years each doing java projects but not anything big or exactly with the latests tools, so we struggled a little bit understanding the building process of the gradle setup, and after running this project, we are now faced with tons of groovy projects demos.
And I am struggling to keep my friends interested in the library as they think using what we know best is a better option than trying to understand a library that would mean to learn asap a new language (we are not that lazy but there is some people that is helping us as consultants/associates and we are afraid that if we dont start producing something we are gonna lose their support [we are not earning anything from this yet but without them as "productowners", we wouldnt know what are exactly the market needs]).
I have watched multiple videos and videos like this: http://www.youtube.com/watch?v=z54hEJvpZys are amazing , I think that is exactly what we need.
I would like to know if maybe there is an example/tutorial in java maybe a screencast,blog or recorded webinar of how to make a simple application where the server binds to a port and multiple java clients update the value and sends a pair of commands.
I dont know something like server starts, puts a default value in a variable, client connects and sees value, second client connects sees value, and a command is sent to server "erase", and both clients see that the server erased it and another command is sent "default" and server sets variable to default.
I am not asking for that exact example but something that I can read to make it like that.
I tried making something like that using the .8 release and I was utterly lost, but i think that an easy example like that could help me to make them see how good of a tool this is, "Install this in your laptop, that's the server run it and see how my client and yours are synched automagically".
Ok, you made a good choice of technologies :-)
It appears that the Dolphin JumpStart project (https://github.com/canoo/DolphinJumpStart) covers exactly that combination: OpenDolphin with Java, view in JavaFX, built with Gradle (use dist/jumpstart-gradle.zip) and jetty as the minimal server implementation.
The Jumpstart project is also explained in a step-by-step fashion as part of the OpenDolphin user guide (http://open-dolphin.org/download/guide/guide/howto.html).
Concerning your question about the shared tacho demo: this demo is using only one server that all clients connect to. The "clients" update each other over the server-side event bus. To that end, we do not open any specific sockets. It is all plain HTTP POST that goes trough all proxies and firewalls and needs no special infrastructure.