onEngineReady vs onServerConnected

[DarioCrivelli]

We can't produce a detailed chart of the scenario in short time. Please, see the notes below.

When the Engine is first created, the onEngineCreation callback is invoked and no connection attempt to the Server is performed. It is invoked only to one page, therefore this is the place in which you can ask for the connection, by calling changeStatus("STREAMING").

Then, the onEngineReady callback is invoked for all pages, so as to allow each page to get a pointer to the Engine object.
This, indeed, happens concurrently with (i.e. either before or after) the connection to the Server.
Once provided with a pointer to the Engine, a page can know the connection status through getStatus and can be informed through onStatusChange (where STREAMING and POLLING mean "connected", DISCONNECTED and CONNECTING mean "not connected" and STALLED means "not sure it is still connected; let's see what happens").

Hence, a suggested code may be the following:

var connected = false;<br /> <br /> pushPage.onEngineReady = function(lsEngine) {<br /> lsEngine.onStatusChange = function(newStatus) {<br /> connected = (newStatus == "STREAMING" || newStatus == "POLLING" || newStatus == "STALLED");<br /> };<br /> // take the current engine status into account<br /> lsEngine.onStatusChange(lsEngine.getStatus());<br /> };<br /> <br /> pushPage.onEngineLost = function() {<br /> connected = false;<br /> };

Adding push tables is also independent with respect to the connection to the Server.
You can add and remove tables at any time. If the connection is not active, adding table does not request a connection; however, as soon as the connection is requested through changeStatus, the table subscription is forwarded to the Server.
Hence, there should be no need to delay adding tables.