Are you looking for information on how XAPI does async processing? http://wiki.xen.org/wiki/VM_Startup
http://wiki.xen.org/wiki/XAPI_Dispatch On 5/21/13 1:52 AM, "Nguyen Anh Tu" <ng.t...@gmail.com> wrote: >no one can explain it for me? > > >2013/5/10 Nguyen Anh Tu <ng.t...@gmail.com> > >> Hi forks, >> >> I'm working on CS + XCP. I have a question: >> >> When starting VM, Async job "startvm" is sent to XCP Host via xapi. Then >> we have to wait until xapi task responses. This code here: >> >> void startVM(Connection conn, Host host, VM vm, String vmName) >>throws >> XmlRpcException { >> Task task = null; >> try { >> * task = vm.startOnAsync(conn, host, false, true);* >> try { >> //poll every 1 seconds , timeout after 10 minutes >> *waitForTask(conn, task, 1000, 10 * 60 * 1000);* >> *checkForSuccess(conn, task);* >> } catch (Types.HandleInvalid e) { >> if (vm.getPowerState(conn) == >>Types.VmPowerState.RUNNING) { >> task = null; >> return; >> } >> throw new CloudRuntimeException("Shutdown VM catch >> HandleInvalid and VM is not in RUNNING state"); >> } >> } catch (XenAPIException e) { >> String msg = "Unable to start VM(" + vmName + ") on host(" + >> _host.uuid +") due to " + e.toString(); >> s_logger.warn(msg, e); >> throw new CloudRuntimeException(msg); >> }finally { >> if( task != null) { >> try { >> task.destroy(conn); >> } catch (Exception e1) { >> s_logger.debug("unable to destroy task(" + >> task.toString() + ") on host(" + _host.uuid +") due to " + >>e1.toString()); >> } >> } >> } >> } >> >> Can you explain how xapi task work? How xapi queue work? When its task >> responses? >> >> Thanks, >> >> -- >> >> N.g.U.y.e.N.A.n.H.t.U >> > > > >-- > >N.g.U.y.e.N.A.n.H.t.U
