Golang Dispatcher_TasksServer.Context方法代碼示例

本文整理匯總了Golang中github.com/docker/swarmkit/api.Dispatcher_TasksServer.Context方法的典型用法代碼示例。如果您正苦於以下問題：Golang Dispatcher_TasksServer.Context方法的具體用法？Golang Dispatcher_TasksServer.Context怎麽用？Golang Dispatcher_TasksServer.Context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/docker/swarmkit/api.Dispatcher_TasksServer的用法示例。

在下文中一共展示了Dispatcher_TasksServer.Context方法的3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: Tasks

// Tasks is a stream of tasks state for node. Each message contains full list
// of tasks which should be run on node, if task is not present in that list,
// it should be terminated.
func (d *Dispatcher) Tasks(r *api.TasksRequest, stream api.Dispatcher_TasksServer) error {
	nodeInfo, err := ca.RemoteNode(stream.Context())
	if err != nil {
		return err
	}
	nodeID := nodeInfo.NodeID

	dctx, err := d.isRunningLocked()
	if err != nil {
		return err
	}

	fields := logrus.Fields{
		"node.id":      nodeID,
		"node.session": r.SessionID,
		"method":       "(*Dispatcher).Tasks",
	}
	if nodeInfo.ForwardedBy != nil {
		fields["forwarder.id"] = nodeInfo.ForwardedBy.NodeID
	}
	log.G(stream.Context()).WithFields(fields).Debugf("")

	if _, err = d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
		return err
	}

	tasksMap := make(map[string]*api.Task)
	nodeTasks, cancel, err := store.ViewAndWatch(
		d.store,
		func(readTx store.ReadTx) error {
			tasks, err := store.FindTasks(readTx, store.ByNodeID(nodeID))
			if err != nil {
				return err
			}
			for _, t := range tasks {
				tasksMap[t.ID] = t
			}
			return nil
		},
		state.EventCreateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventUpdateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventDeleteTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
	)
	if err != nil {
		return err
	}
	defer cancel()

	for {
		if _, err := d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
			return err
		}

		var tasks []*api.Task
		for _, t := range tasksMap {
			// dispatcher only sends tasks that have been assigned to a node
			if t != nil && t.Status.State >= api.TaskStateAssigned {
				tasks = append(tasks, t)
			}
		}

		if err := stream.Send(&api.TasksMessage{Tasks: tasks}); err != nil {
			return err
		}

		// bursty events should be processed in batches and sent out snapshot
		var (
			modificationCnt int
			batchingTimer   *time.Timer
			batchingTimeout <-chan time.Time
		)

	batchingLoop:
		for modificationCnt < modificationBatchLimit {
			select {
			case event := <-nodeTasks:
				switch v := event.(type) {
				case state.EventCreateTask:
					tasksMap[v.Task.ID] = v.Task
					modificationCnt++
				case state.EventUpdateTask:
					if oldTask, exists := tasksMap[v.Task.ID]; exists {
						// States ASSIGNED and below are set by the orchestrator/scheduler,
						// not the agent, so tasks in these states need to be sent to the
						// agent even if nothing else has changed.
						if equality.TasksEqualStable(oldTask, v.Task) && v.Task.Status.State > api.TaskStateAssigned {
							// this update should not trigger action at agent
							tasksMap[v.Task.ID] = v.Task
							continue
						}
					}
					tasksMap[v.Task.ID] = v.Task
					modificationCnt++
				case state.EventDeleteTask:
//.........這裏部分代碼省略.........

開發者ID:yongtang，項目名稱:swarmkit，代碼行數:101，代碼來源:dispatcher.go

示例2: Tasks

// Tasks is a stream of tasks state for node. Each message contains full list
// of tasks which should be run on node, if task is not present in that list,
// it should be terminated.
func (d *Dispatcher) Tasks(r *api.TasksRequest, stream api.Dispatcher_TasksServer) error {
	nodeInfo, err := ca.RemoteNode(stream.Context())
	if err != nil {
		return err
	}
	nodeID := nodeInfo.NodeID

	if err := d.isRunningLocked(); err != nil {
		return err
	}

	fields := logrus.Fields{
		"node.id":      nodeID,
		"node.session": r.SessionID,
		"method":       "(*Dispatcher).Tasks",
	}
	if nodeInfo.ForwardedBy != nil {
		fields["forwarder.id"] = nodeInfo.ForwardedBy.NodeID
	}
	log.G(stream.Context()).WithFields(fields).Debugf("")

	if _, err = d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
		return err
	}

	tasksMap := make(map[string]*api.Task)
	nodeTasks, cancel, err := store.ViewAndWatch(
		d.store,
		func(readTx store.ReadTx) error {
			tasks, err := store.FindTasks(readTx, store.ByNodeID(nodeID))
			if err != nil {
				return err
			}
			for _, t := range tasks {
				tasksMap[t.ID] = t
			}
			return nil
		},
		state.EventCreateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventUpdateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventDeleteTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
	)
	if err != nil {
		return err
	}
	defer cancel()

	for {
		if _, err := d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
			return err
		}

		var tasks []*api.Task
		for _, t := range tasksMap {
			// dispatcher only sends tasks that have been assigned to a node
			if t != nil && t.Status.State >= api.TaskStateAssigned {
				tasks = append(tasks, t)
			}
		}

		if err := stream.Send(&api.TasksMessage{Tasks: tasks}); err != nil {
			return err
		}

		select {
		case event := <-nodeTasks:
			switch v := event.(type) {
			case state.EventCreateTask:
				tasksMap[v.Task.ID] = v.Task
			case state.EventUpdateTask:
				tasksMap[v.Task.ID] = v.Task
			case state.EventDeleteTask:
				delete(tasksMap, v.Task.ID)
			}
		case <-stream.Context().Done():
			return stream.Context().Err()
		case <-d.ctx.Done():
			return d.ctx.Err()
		}
	}
}

開發者ID:ypjin，項目名稱:swarmkit，代碼行數:87，代碼來源:dispatcher.go

示例3: Tasks

// Tasks is a stream of tasks state for node. Each message contains full list
// of tasks which should be run on node, if task is not present in that list,
// it should be terminated.
func (d *Dispatcher) Tasks(r *api.TasksRequest, stream api.Dispatcher_TasksServer) error {
	nodeInfo, err := ca.RemoteNode(stream.Context())
	if err != nil {
		return err
	}
	nodeID := nodeInfo.NodeID

	if err := d.isRunningLocked(); err != nil {
		return err
	}

	fields := logrus.Fields{
		"node.id":      nodeID,
		"node.session": r.SessionID,
		"method":       "(*Dispatcher).Tasks",
	}
	if nodeInfo.ForwardedBy != nil {
		fields["forwarder.id"] = nodeInfo.ForwardedBy.NodeID
	}
	log.G(stream.Context()).WithFields(fields).Debugf("")

	if _, err = d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
		return err
	}

	tasksMap := make(map[string]*api.Task)
	nodeTasks, cancel, err := store.ViewAndWatch(
		d.store,
		func(readTx store.ReadTx) error {
			tasks, err := store.FindTasks(readTx, store.ByNodeID(nodeID))
			if err != nil {
				return err
			}
			for _, t := range tasks {
				tasksMap[t.ID] = t
			}
			return nil
		},
		state.EventCreateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventUpdateTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
		state.EventDeleteTask{Task: &api.Task{NodeID: nodeID},
			Checks: []state.TaskCheckFunc{state.TaskCheckNodeID}},
	)
	if err != nil {
		return err
	}
	defer cancel()

	for {
		if _, err := d.nodes.GetWithSession(nodeID, r.SessionID); err != nil {
			return err
		}

		var tasks []*api.Task
		for _, t := range tasksMap {
			// dispatcher only sends tasks that have been assigned to a node
			if t != nil && t.Status.State >= api.TaskStateAssigned {
				tasks = append(tasks, t)
			}
		}

		if err := stream.Send(&api.TasksMessage{Tasks: tasks}); err != nil {
			return err
		}

		// bursty events should be processed in batches and sent out snapshot
		const modificationBatchLimit = 200
		const eventPausedGap = 50 * time.Millisecond
		var modificationCnt int
		// eventPaused is true when there have been modifications
		// but next event has not arrived within eventPausedGap
		eventPaused := false

		for modificationCnt < modificationBatchLimit && !eventPaused {
			select {
			case event := <-nodeTasks:
				switch v := event.(type) {
				case state.EventCreateTask:
					tasksMap[v.Task.ID] = v.Task
					modificationCnt++
				case state.EventUpdateTask:
					if oldTask, exists := tasksMap[v.Task.ID]; exists {
						if equality.TasksEqualStable(oldTask, v.Task) {
							// this update should not trigger action at agent
							tasksMap[v.Task.ID] = v.Task
							continue
						}
					}
					tasksMap[v.Task.ID] = v.Task
					modificationCnt++
				case state.EventDeleteTask:
					delete(tasksMap, v.Task.ID)
					modificationCnt++
				}
			case <-time.After(eventPausedGap):
//.........這裏部分代碼省略.........

開發者ID:Chandra-TechPassionate，項目名稱:docker，代碼行數:101，代碼來源:dispatcher.go

注：本文中的github.com/docker/swarmkit/api.Dispatcher_TasksServer.Context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。