error when i register function callbacks for domain events

[zhenfdfs]

I want my ios app receive the event of my virtual machine, so i need to monitor all the event. But I encounter an issue when I use this function registerDomainEvent .Could anyone help me? Very thanks!

[root@TEST-LC-NC-0-0-31 ~]# node event_cb.js
libvirt: Remote Driver error : adding cb to list

/root/event_cb.js:14
hyper.registerDomainEvent(event);
^
[object Error]
[root@TEST-LC-NC-0-0-31 ~]#

My code as follows:

1 var libvirt = require('libvirt');
2
3 var Hypervisor = libvirt.Hypervisor;
4 var hyper = new Hypervisor('qemu:///system');
5
6 var domain = hyper.lookupDomainById(173);
7
8 var event = { 'evtype': hyper.VIR_DOMAIN_EVENT_ID_REBOOT ,
9 'domain':domain,
10 'callback': function(hyp, dom, data) {
11 console.log('callback');
12 }
13 };
14 hyper.registerDomainEvent(event);

[zhenfdfs]

I use kvm for hypervisor and the version of libvirt is 1.2.0

[c4milo]

I'm not sure I fully understand. What is the exact error you are getting?

[zhenfdfs]

Thanks for c4milo 's reply. Let me have a detail describle. I run a short js script. All of the js code as follow:

1 var libvirt = require('libvirt');
2
3 var Hypervisor = libvirt.Hypervisor;
4 var hyper = new Hypervisor('qemu:///system');
5
6 var domain = hyper.lookupDomainById(173);
7
8 var event = { 'evtype': hyper.VIR_DOMAIN_EVENT_ID_REBOOT ,
9 'domain':domain,
10 'callback': function(hyp, dom, data) {
11 console.log('callback');
12 }
13 };
14 hyper.registerDomainEvent(event);

After run this js script , I get an error. The error msg as follow

libvirt: Remote Driver error : adding cb to list
/root/event_cb.js:14
hyper.registerDomainEvent(event);
^
[object Error]

[c4milo]

are you sure hyper.lookupDomainById(173); is returning something?

[atoy40]

First , you've to call libvirt.setupEvent() to start the event loop handling.
Then here is an example i'm using :

  libvirt.setupEvent();
  // self.connection is an Hypervisor instance.
  self.connection.registerDomainEvent({evtype: self.connection.VIR_DOMAIN_EVENT_ID_LIFECYCLE, callback: function(hv, dom, data) {
      console.log("[virt] state change "+ data.evtype + " " + data.detail);
      var id = dom.getUUID();
      switch(data.evtype) {
        case 0: // defined
          break;
        case 1: // undef
          break;
        case 2: // started
          break;
        case 5:
            break;
        default:
          break;
      }
    }});

Hope it helps

Anthony.

[mbroadst]

closing as it is no longer relevant to the current codebase/implementation. Will reopen if @zhenfdfs chimes in