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Golang RemoteStateWatcher.Stop方法代碼示例

本文整理匯總了Golang中github.com/juju/juju/worker/uniter/remotestate.RemoteStateWatcher.Stop方法的典型用法代碼示例。如果您正苦於以下問題:Golang RemoteStateWatcher.Stop方法的具體用法?Golang RemoteStateWatcher.Stop怎麽用?Golang RemoteStateWatcher.Stop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github.com/juju/juju/worker/uniter/remotestate.RemoteStateWatcher的用法示例。


在下文中一共展示了RemoteStateWatcher.Stop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: loop

func (u *Uniter) loop(unitTag names.UnitTag) (err error) {
	if err := u.init(unitTag); err != nil {
		if err == worker.ErrTerminateAgent {
			return err
		}
		return fmt.Errorf("failed to initialize uniter for %q: %v", unitTag, err)
	}
	logger.Infof("unit %q started", u.unit)

	// Install is a special case, as it must run before there
	// is any remote state, and before the remote state watcher
	// is started.
	var charmURL *corecharm.URL
	opState := u.operationExecutor.State()
	if opState.Kind == operation.Install {
		logger.Infof("resuming charm install")
		op, err := u.operationFactory.NewInstall(opState.CharmURL)
		if err != nil {
			return errors.Trace(err)
		}
		if err := u.operationExecutor.Run(op); err != nil {
			return errors.Trace(err)
		}
		charmURL = opState.CharmURL
	} else {
		curl, err := u.unit.CharmURL()
		if err != nil {
			return errors.Trace(err)
		}
		charmURL = curl
	}

	var (
		watcher   *remotestate.RemoteStateWatcher
		watcherMu sync.Mutex
	)

	restartWatcher := func() error {
		watcherMu.Lock()
		defer watcherMu.Unlock()

		if watcher != nil {
			if err := watcher.Stop(); err != nil {
				return errors.Trace(err)
			}
		}
		var err error
		watcher, err = remotestate.NewWatcher(
			remotestate.WatcherConfig{
				State:               remotestate.NewAPIState(u.st),
				LeadershipTracker:   u.leadershipTracker,
				UnitTag:             unitTag,
				UpdateStatusChannel: u.updateStatusAt,
			})
		if err != nil {
			return errors.Trace(err)
		}
		// Stop the uniter if the watcher fails. The watcher may be
		// stopped cleanly, so only kill the tomb if the error is
		// non-nil.
		go func(w *remotestate.RemoteStateWatcher) {
			if err := w.Wait(); err != nil {
				u.tomb.Kill(err)
			}
		}(watcher)
		return nil
	}

	// watcher may be replaced, so use a closure.
	u.addCleanup(func() error {
		watcherMu.Lock()
		defer watcherMu.Unlock()

		if watcher != nil {
			return watcher.Stop()
		}
		return nil
	})

	onIdle := func() error {
		opState := u.operationExecutor.State()
		if opState.Kind != operation.Continue {
			// We should only set idle status if we're in
			// the "Continue" state, which indicates that
			// there is nothing to do and we're not in an
			// error state.
			return nil
		}
		return setAgentStatus(u, params.StatusIdle, "", nil)
	}

	clearResolved := func() error {
		if err := u.unit.ClearResolved(); err != nil {
			return errors.Trace(err)
		}
		watcher.ClearResolvedMode()
		return nil
	}

	for {
//.........這裏部分代碼省略.........
開發者ID:kakamessi99,項目名稱:juju,代碼行數:101,代碼來源:uniter.go


注:本文中的github.com/juju/juju/worker/uniter/remotestate.RemoteStateWatcher.Stop方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。