本文整理匯總了Golang中github.com/juju/juju/state.UpgradeInfo.Watch方法的典型用法代碼示例。如果您正苦於以下問題：Golang UpgradeInfo.Watch方法的具體用法？Golang UpgradeInfo.Watch怎麽用？Golang UpgradeInfo.Watch使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/juju/juju/state.UpgradeInfo的用法示例。
在下文中一共展示了UpgradeInfo.Watch方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: waitForOtherStateServers
func (c *upgradeWorkerContext) waitForOtherStateServers(info *state.UpgradeInfo) error {
watcher := info.Watch()
defer watcher.Stop()
maxWait := getUpgradeStartTimeout(c.isMaster)
timeout := time.After(maxWait)
for {
select {
case <-watcher.Changes():
if err := info.Refresh(); err != nil {
return errors.Trace(err)
}
if c.isMaster {
if ready, err := info.AllProvisionedStateServersReady(); err != nil {
return errors.Trace(err)
} else if ready {
// All state servers ready to start upgrade
err := info.SetStatus(state.UpgradeRunning)
return errors.Trace(err)
}
} else {
if info.Status() == state.UpgradeFinishing {
// Master is done, ok to proceed
return nil
}
}
case <-timeout:
if c.isMaster {
if err := info.Abort(); err != nil {
return errors.Annotate(err, "unable to abort upgrade")
}
}
return errors.Errorf("timed out after %s", maxWait)
case <-c.agent.Dying():
return agentTerminating
}
}
}