pepone
commented
2 years ago Hi Normando,
I think the problem is that Meta.addCallback is expecting a direct proxy, a proxy with endpoints, and here your callback is a fixed proxy that doesn't include any endpoints.
Using Glacier2 can overcome this, the proxy pass to Meta.addCallback will use the Glacier2 router server endpoints, and Glacier2 will route the callback to your JavaScript client throw the existing connection.
See https://doc.zeroc.com/ice/3.7/ice-services/glacier2/callbacks-through-glacier2
In your example you are using the implicit request context, in order to have Glacier2 forward the context you need to set Glacier2.Client.ForwardContext and, or Glacier2.Server.ForwardContext in you Glacier2 configuration. See the details in https://doc.zeroc.com/ice/3.7/property-reference/glacier2
You client code would be something like
const { Ice, Glacier2 } = require("ice");
const { Murmur } = require("./ice/Murmur.js");
let communicator = null
let proxy = null
class MetaCallbackI extends Murmur.MetaCallback
{
started()
{
console.log('Started');
}
stopped()
{
console.log('Stopped')
}
}
(async function _init() {
try{
const iceOptions = new Ice.InitializationData();
iceOptions.properties = Ice.createProperties([], iceOptions.properties);
iceOptions.properties.setProperty("Ice.Default.EncodingVersion", "1.0");
iceOptions.properties.setProperty("Ice.ImplicitContext", "Shared");
iceOptions.properties.setProperty("Ice.Default.Router", "DemoGlacier2/router:tcp -p 4063 -h localhost");
communicator = Ice.initialize(iceOptions);
communicator.getImplicitContext().put("secret", 'xxxx');
proxy = await Murmur.MetaPrx.checkedCast(communicator.stringToProxy("Meta:tcp -h 127.0.0.1 -p 6502")); // proxy
const router = await Glacier2.RouterPrx.checkedCast(communicator.getDefaultRouter());
const session = await router.createSession("user", "password");
const [timeout, category, adapter] = await Promise.all(
[
router.getACMTimeout(),
router.getCategoryForClient(),
router.ice_getCommunicator().createObjectAdapterWithRouter("", router)
]);
const connection = router.ice_getCachedConnection();
if(timeout > 0)
{
connection.setACM(timeout, undefined, Ice.ACMHeartbeat.HeartbeatAlways);
}
connection.setCloseCallback(() => error("Connection lost"));
const receiver = Murmur.MetaCallbackPrx.uncheckedCast(
adapter.add(new MetaCallbackI(), new Ice.Identity("callback", category)));
await proxy.addCallback(receiver);
await communicator.waitForShutdown();
}catch (ex){
return {err: ex.toString()};
}
})()Note I didn't test the code I just adapted yours based on our demo https://github.com/zeroc-ice/ice-demos/tree/3.7/js/Glacier2/simpleChat
NormandoHall
Hi all. Sorry to file a bug with a question, but I can't found the correct way to fix my issue.
I was readed all examples at https://github.com/zeroc-ice/ice-demos/blob/3.7/js/Ice/bidir/ also #194
I am trying to get a callback from Murmur server with NodeJS client IN SAME SERVER (no remote server).
This is the ice from Murmur: https://mumble.sourceforge.io/slice/1.3.0/Murmur.html
And this is my testing code:
On Murmur's log I get:
<W>2022-02-05 17:25:56.183 Added Ice MetaCallback b2404fd8-9147-4809-8bee-02b1a62ed913 -o -e 1.0but if I tried with a python client I get:
<W>2022-02-05 17:26:14.699 Added Ice MetaCallback 364F6850-3F07-4F8B-A4F0-F8D46316B75A -o -e 1.0:tcp -h 127.0.0.1 -p 40397 -t 5000Also I was installed Glacier2 in Murmur server, but I can´t figure how to write the code based on my code and
https://github.com/zeroc-ice/ice-demos/tree/3.7/js/Glacier2/simpleChat
Appreciate any help or guidelines. I am completely lost
Thanks