go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/logdog/appengine/coordinator/endpoints/services/loadStream.go (about)

     1  // Copyright 2015 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package services
    16  
    17  import (
    18  	"context"
    19  
    20  	"google.golang.org/grpc/codes"
    21  	"google.golang.org/grpc/status"
    22  	"google.golang.org/protobuf/types/known/durationpb"
    23  
    24  	ds "go.chromium.org/luci/gae/service/datastore"
    25  
    26  	logdog "go.chromium.org/luci/logdog/api/endpoints/coordinator/services/v1"
    27  	"go.chromium.org/luci/logdog/appengine/coordinator"
    28  
    29  	"go.chromium.org/luci/common/clock"
    30  	"go.chromium.org/luci/common/errors"
    31  	log "go.chromium.org/luci/common/logging"
    32  )
    33  
    34  // LoadStream loads the log stream state.
    35  func (s *server) LoadStream(c context.Context, req *logdog.LoadStreamRequest) (*logdog.LoadStreamResponse, error) {
    36  	id := coordinator.HashID(req.Id)
    37  	if err := id.Normalize(); err != nil {
    38  		log.WithError(err).Errorf(c, "Invalid stream ID.")
    39  		return nil, status.Errorf(codes.InvalidArgument, "Invalid ID (%s): %s", id, err)
    40  	}
    41  
    42  	ls := &coordinator.LogStream{ID: coordinator.HashID(req.Id)}
    43  	lst := ls.State(c)
    44  
    45  	if err := ds.Get(c, lst, ls); err != nil {
    46  		if anyNoSuchEntity(err) {
    47  			log.WithError(err).Errorf(c, "No such entity in datastore (log stream).")
    48  
    49  			// The state isn't registered, so this stream does not exist.
    50  			return nil, status.Errorf(codes.NotFound, "Log stream was not found.")
    51  		}
    52  
    53  		log.WithError(err).Errorf(c, "Failed to load log stream.")
    54  		return nil, status.Error(codes.Internal, "internal server error")
    55  	}
    56  
    57  	// The log stream and state loaded successfully.
    58  	resp := logdog.LoadStreamResponse{
    59  		State: buildLogStreamState(ls, lst),
    60  	}
    61  	if req.Desc {
    62  		resp.Desc = ls.Descriptor
    63  	}
    64  	resp.ArchivalKey = lst.ArchivalKey
    65  	resp.Age = durationpb.New(ds.RoundTime(clock.Now(c)).Sub(lst.Updated))
    66  
    67  	return &resp, nil
    68  }
    69  
    70  func anyNoSuchEntity(err error) bool {
    71  	return errors.Any(err, func(err error) bool {
    72  		return err == ds.ErrNoSuchEntity
    73  	})
    74  }