Golang mvcc.WatchID函数代码示例

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本文整理汇总了Golang中github.com/coreos/etcd/mvcc.WatchID函数的典型用法代码示例。如果您正苦于以下问题：Golang WatchID函数的具体用法？Golang WatchID怎么用？Golang WatchID使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了WatchID函数的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: sendLoop

func (sws *serverWatchStream) sendLoop() {
	// watch ids that are currently active
	ids := make(map[mvcc.WatchID]struct{})
	// watch responses pending on a watch id creation message
	pending := make(map[mvcc.WatchID][]*pb.WatchResponse)

	interval := GetProgressReportInterval()
	progressTicker := time.NewTicker(interval)

	defer func() {
		progressTicker.Stop()
		// drain the chan to clean up pending events
		for ws := range sws.watchStream.Chan() {
			mvcc.ReportEventReceived(len(ws.Events))
		}
		for _, wrs := range pending {
			for _, ws := range wrs {
				mvcc.ReportEventReceived(len(ws.Events))
			}
		}
	}()

	for {
		select {
		case wresp, ok := <-sws.watchStream.Chan():
			if !ok {
				return
			}

			// TODO: evs is []mvccpb.Event type
			// either return []*mvccpb.Event from the mvcc package
			// or define protocol buffer with []mvccpb.Event.
			evs := wresp.Events
			events := make([]*mvccpb.Event, len(evs))
			sws.mu.Lock()
			needPrevKV := sws.prevKV[wresp.WatchID]
			sws.mu.Unlock()
			for i := range evs {
				events[i] = &evs[i]

				if needPrevKV {
					opt := mvcc.RangeOptions{Rev: evs[i].Kv.ModRevision - 1}
					r, err := sws.watchable.Range(evs[i].Kv.Key, nil, opt)
					if err == nil && len(r.KVs) != 0 {
						events[i].PrevKv = &(r.KVs[0])
					}
				}
			}

			wr := &pb.WatchResponse{
				Header:          sws.newResponseHeader(wresp.Revision),
				WatchId:         int64(wresp.WatchID),
				Events:          events,
				CompactRevision: wresp.CompactRevision,
			}

			if _, hasId := ids[wresp.WatchID]; !hasId {
				// buffer if id not yet announced
				wrs := append(pending[wresp.WatchID], wr)
				pending[wresp.WatchID] = wrs
				continue
			}

			mvcc.ReportEventReceived(len(evs))
			if err := sws.gRPCStream.Send(wr); err != nil {
				return
			}

			sws.mu.Lock()
			if len(evs) > 0 && sws.progress[wresp.WatchID] {
				// elide next progress update if sent a key update
				sws.progress[wresp.WatchID] = false
			}
			sws.mu.Unlock()

		case c, ok := <-sws.ctrlStream:
			if !ok {
				return
			}

			if err := sws.gRPCStream.Send(c); err != nil {
				return
			}

			// track id creation
			wid := mvcc.WatchID(c.WatchId)
			if c.Canceled {
				delete(ids, wid)
				continue
			}
			if c.Created {
				// flush buffered events
				ids[wid] = struct{}{}
				for _, v := range pending[wid] {
					mvcc.ReportEventReceived(len(v.Events))
					if err := sws.gRPCStream.Send(v); err != nil {
						return
					}
				}
				delete(pending, wid)
//.........这里部分代码省略.........

开发者ID:hongchaodeng，项目名称:etcd，代码行数:101，代码来源:watch.go

示例2: recvLoop

func (sws *serverWatchStream) recvLoop() error {
	for {
		req, err := sws.gRPCStream.Recv()
		if err == io.EOF {
			return nil
		}
		if err != nil {
			return err
		}

		switch uv := req.RequestUnion.(type) {
		case *pb.WatchRequest_CreateRequest:
			if uv.CreateRequest == nil {
				break
			}

			creq := uv.CreateRequest
			if len(creq.Key) == 0 {
				// \x00 is the smallest key
				creq.Key = []byte{0}
			}
			if len(creq.RangeEnd) == 1 && creq.RangeEnd[0] == 0 {
				// support  >= key queries
				creq.RangeEnd = []byte{}
			}
			wsrev := sws.watchStream.Rev()
			rev := creq.StartRevision
			if rev == 0 {
				rev = wsrev + 1
			}
			id := sws.watchStream.Watch(creq.Key, creq.RangeEnd, rev)
			if id != -1 && creq.ProgressNotify {
				sws.progress[id] = true
			}
			sws.ctrlStream <- &pb.WatchResponse{
				Header:   sws.newResponseHeader(wsrev),
				WatchId:  int64(id),
				Created:  true,
				Canceled: id == -1,
			}
		case *pb.WatchRequest_CancelRequest:
			if uv.CancelRequest != nil {
				id := uv.CancelRequest.WatchId
				err := sws.watchStream.Cancel(mvcc.WatchID(id))
				if err == nil {
					sws.ctrlStream <- &pb.WatchResponse{
						Header:   sws.newResponseHeader(sws.watchStream.Rev()),
						WatchId:  id,
						Canceled: true,
					}
					sws.mu.Lock()
					delete(sws.progress, mvcc.WatchID(id))
					sws.mu.Unlock()
				}
			}
			// TODO: do we need to return error back to client?
		default:
			panic("not implemented")
		}
	}
}

开发者ID:XiangrongFan，项目名称:etcd，代码行数:61，代码来源:watch.go

示例3: recvLoop

func (sws *serverWatchStream) recvLoop() error {
	for {
		req, err := sws.gRPCStream.Recv()
		if err == io.EOF {
			return nil
		}
		if err != nil {
			return err
		}

		switch uv := req.RequestUnion.(type) {
		case *pb.WatchRequest_CreateRequest:
			if uv.CreateRequest == nil {
				break
			}

			creq := uv.CreateRequest
			if len(creq.Key) == 0 {
				// \x00 is the smallest key
				creq.Key = []byte{0}
			}
			if len(creq.RangeEnd) == 1 && creq.RangeEnd[0] == 0 {
				// support  >= key queries
				creq.RangeEnd = []byte{}
			}
			filters := FiltersFromRequest(creq)

			wsrev := sws.watchStream.Rev()
			rev := creq.StartRevision
			if rev == 0 {
				rev = wsrev + 1
			}
			id := sws.watchStream.Watch(creq.Key, creq.RangeEnd, rev, filters...)
			if id != -1 {
				sws.mu.Lock()
				if creq.ProgressNotify {
					sws.progress[id] = true
				}
				if creq.PrevKv {
					sws.prevKV[id] = true
				}
				sws.mu.Unlock()
			}
			wr := &pb.WatchResponse{
				Header:   sws.newResponseHeader(wsrev),
				WatchId:  int64(id),
				Created:  true,
				Canceled: id == -1,
			}
			select {
			case sws.ctrlStream <- wr:
			case <-sws.closec:
				return nil
			}
		case *pb.WatchRequest_CancelRequest:
			if uv.CancelRequest != nil {
				id := uv.CancelRequest.WatchId
				err := sws.watchStream.Cancel(mvcc.WatchID(id))
				if err == nil {
					sws.ctrlStream <- &pb.WatchResponse{
						Header:   sws.newResponseHeader(sws.watchStream.Rev()),
						WatchId:  id,
						Canceled: true,
					}
					sws.mu.Lock()
					delete(sws.progress, mvcc.WatchID(id))
					delete(sws.prevKV, mvcc.WatchID(id))
					sws.mu.Unlock()
				}
			}
		default:
			// we probably should not shutdown the entire stream when
			// receive an valid command.
			// so just do nothing instead.
			continue
		}
	}
}

开发者ID:hongchaodeng，项目名称:etcd，代码行数:78，代码来源:watch.go

示例4: recvLoop

func (sws *serverWatchStream) recvLoop() error {
	defer close(sws.ctrlStream)
	for {
		req, err := sws.gRPCStream.Recv()
		if err == io.EOF {
			return nil
		}
		if err != nil {
			return err
		}

		switch uv := req.RequestUnion.(type) {
		case *pb.WatchRequest_CreateRequest:
			if uv.CreateRequest == nil {
				break
			}

			creq := uv.CreateRequest
			if len(creq.Key) == 0 {
				// \x00 is the smallest key
				creq.Key = []byte{0}
			}
			if len(creq.RangeEnd) == 1 && creq.RangeEnd[0] == 0 {
				// support  >= key queries
				creq.RangeEnd = []byte{}
			}
			filters := make([]mvcc.FilterFunc, 0, len(creq.Filters))
			for _, ft := range creq.Filters {
				switch ft {
				case pb.WatchCreateRequest_NOPUT:
					filters = append(filters, filterNoPut)
				case pb.WatchCreateRequest_NODELETE:
					filters = append(filters, filterNoDelete)
				default:
				}
			}

			wsrev := sws.watchStream.Rev()
			rev := creq.StartRevision
			if rev == 0 {
				rev = wsrev + 1
			}
			id := sws.watchStream.Watch(creq.Key, creq.RangeEnd, rev, filters...)
			if id != -1 && creq.ProgressNotify {
				sws.progress[id] = true
			}
			wr := &pb.WatchResponse{
				Header:   sws.newResponseHeader(wsrev),
				WatchId:  int64(id),
				Created:  true,
				Canceled: id == -1,
			}
			select {
			case sws.ctrlStream <- wr:
			case <-sws.closec:
				return nil
			}
		case *pb.WatchRequest_CancelRequest:
			if uv.CancelRequest != nil {
				id := uv.CancelRequest.WatchId
				err := sws.watchStream.Cancel(mvcc.WatchID(id))
				if err == nil {
					sws.ctrlStream <- &pb.WatchResponse{
						Header:   sws.newResponseHeader(sws.watchStream.Rev()),
						WatchId:  id,
						Canceled: true,
					}
					sws.mu.Lock()
					delete(sws.progress, mvcc.WatchID(id))
					sws.mu.Unlock()
				}
			}
			// TODO: do we need to return error back to client?
		default:
			panic("not implemented")
		}
	}
}

开发者ID:sofuture，项目名称:etcd，代码行数:78，代码来源:watch.go

注：本文中的github.com/coreos/etcd/mvcc.WatchID函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。