2020-03-30 08:19:33 +00:00
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package weed_server
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import (
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2020-04-05 07:51:16 +00:00
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"strings"
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"time"
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2020-03-30 08:19:33 +00:00
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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)
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func (fs *FilerServer) ListenForEvents(req *filer_pb.ListenForEventsRequest, stream filer_pb.SeaweedFiler_ListenForEventsServer) error {
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peerAddress := findClientAddress(stream.Context(), 0)
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2020-04-05 07:51:16 +00:00
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clientName := fs.addClient(req.ClientName, peerAddress)
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2020-03-30 08:19:33 +00:00
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2020-04-05 07:51:16 +00:00
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defer fs.deleteClient(clientName)
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2020-03-30 08:19:33 +00:00
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2020-04-05 07:51:16 +00:00
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lastReadTime := time.Now()
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if req.SinceNs > 0 {
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lastReadTime = time.Unix(0, req.SinceNs)
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}
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var readErr error
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for {
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2020-03-30 08:19:33 +00:00
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2020-04-05 07:51:16 +00:00
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lastReadTime, readErr = fs.filer.ReadLogBuffer(lastReadTime, func(fullpath string, eventNotification *filer_pb.EventNotification) error {
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if strings.HasPrefix(fullpath, "/.meta") {
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return nil
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}
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if !strings.HasPrefix(fullpath, req.Directory) {
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return nil
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}
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message := &filer_pb.FullEventNotification{
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Directory: fullpath,
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EventNotification: eventNotification,
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}
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2020-03-30 08:19:33 +00:00
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if err := stream.Send(message); err != nil {
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return err
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}
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2020-04-05 07:51:16 +00:00
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return nil
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})
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if readErr != nil {
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glog.V(0).Infof("=> client %v: %+v", clientName, readErr)
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return readErr
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2020-03-30 08:19:33 +00:00
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}
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2020-04-05 07:51:16 +00:00
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fs.listenersLock.Lock()
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fs.listenersCond.Wait()
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fs.listenersLock.Unlock()
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2020-03-30 08:19:33 +00:00
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}
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return nil
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}
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2020-04-05 07:51:16 +00:00
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func (fs *FilerServer) addClient(clientType string, clientAddress string) (clientName string) {
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2020-03-30 08:19:33 +00:00
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clientName = clientType + "@" + clientAddress
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glog.V(0).Infof("+ listener %v", clientName)
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return
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}
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2020-04-05 07:51:16 +00:00
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func (fs *FilerServer) deleteClient(clientName string) {
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2020-03-30 08:19:33 +00:00
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glog.V(0).Infof("- listener %v", clientName)
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}
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2020-04-05 07:51:16 +00:00
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func (fs *FilerServer) notifyMetaListeners() {
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fs.listenersCond.Broadcast()
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2020-03-30 08:19:33 +00:00
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}
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