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https://github.com/seaweedfs/seaweedfs.git
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83 lines
2 KiB
Go
83 lines
2 KiB
Go
package weed_server
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import (
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"strings"
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"time"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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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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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest, stream filer_pb.SeaweedFiler_SubscribeMetadataServer) error {
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peerAddress := findClientAddress(stream.Context(), 0)
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clientName := fs.addClient(req.ClientName, peerAddress)
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defer fs.deleteClient(clientName)
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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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lastReadTime, readErr = fs.filer.ReadLogBuffer(lastReadTime, func(dirPath string, eventNotification *filer_pb.EventNotification) error {
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// get complete path to the file or directory
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var entryName string
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if eventNotification.OldEntry != nil {
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entryName = eventNotification.OldEntry.Name
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} else if eventNotification.NewEntry != nil {
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entryName = eventNotification.NewEntry.Name
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}
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fullpath := util.Join(dirPath, entryName)
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// skip on filer internal meta logs
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if strings.HasPrefix(fullpath, filer2.SystemLogDir) {
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return nil
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}
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if !strings.HasPrefix(fullpath, req.PathPrefix) {
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return nil
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}
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message := &filer_pb.SubscribeMetadataResponse{
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Directory: dirPath,
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EventNotification: eventNotification,
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}
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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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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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}
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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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}
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}
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func (fs *FilerServer) addClient(clientType string, clientAddress string) (clientName string) {
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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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func (fs *FilerServer) deleteClient(clientName string) {
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glog.V(0).Infof("- listener %v", clientName)
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}
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func (fs *FilerServer) notifyMetaListeners() {
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fs.listenersCond.Broadcast()
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}
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