github.com/m3db/m3@v1.5.0/src/msg/producer/writer/metadata.go (about)

     1  // Copyright (c) 2018 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package writer
    22  
    23  import "github.com/m3db/m3/src/msg/generated/proto/msgpb"
    24  
    25  // metadata is the metadata for a message.
    26  type metadata struct {
    27  	metadataKey
    28  	sentAtNanos uint64
    29  }
    30  
    31  // metadataKey uniquely identifies a metadata.
    32  type metadataKey struct {
    33  	shard uint64
    34  	id    uint64
    35  }
    36  
    37  func (m metadata) ToProto(pb *msgpb.Metadata) {
    38  	pb.Shard = m.shard
    39  	pb.Id = m.id
    40  	pb.SentAtNanos = m.sentAtNanos
    41  }
    42  
    43  func (m *metadata) FromProto(pb msgpb.Metadata) {
    44  	m.shard = pb.Shard
    45  	m.id = pb.Id
    46  	m.sentAtNanos = pb.SentAtNanos
    47  }
    48  
    49  func newMetadataFromProto(pb msgpb.Metadata) metadata {
    50  	var m metadata
    51  	m.FromProto(pb)
    52  	return m
    53  }