ObjectReferenceModel and synchronous DWR calls
The following testbed sets up an ObjectReferenceModel representing the channelPlaybackModel and simulates some of the interaction for our 2.0-M02 milestone. It also sets up a couple of listeners to changes to the channel playback selection.
Finally, a loop will repeatedly wait for the user to click a button, then request a random channel from the server using a synchronous call and set the channel playback selection to that.
The two listeners will log to the firebug console what they would be doing in an actually developed system.
// import com.dustindiaz.publisher
// import tv.zignal.karateka.models.ObjectReferenceModel
// import dwr:interface/ScheduleClientApi
var channelPlaybackModel = new ObjectReferenceModel();
var channelPlaybackListener = function channelPlaybackListener(event) {
var to = event.to ? event.to.url : "nothing";
console.info("Ask PlaybackManager to start playing " + to);
}
channelPlaybackListener.subscribe(channelPlaybackModel.changed);
var channelSwitchListener = function channelSwitchListener(event) {
var to = event.to ? event.to.title : "nothing";
console.info("Display that we are watching " + to);
}
channelSwitchListener.subscribe(channelPlaybackModel.changed);
for( i=0; i<10; i++ ) {
alert("Wait for user interaction");
var channel;
ScheduleClientApi.getRandomTvChannel({
async:false,
callback: function(result) {
channel = result;
}
});
channelPlaybackModel.set(channel);
}