github.com/m3db/m3@v1.5.0/src/dbnode/persist/fs/noop_merge_with.go (about) 1 // Copyright (c) 2020 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 fs 22 23 import ( 24 "github.com/m3db/m3/src/dbnode/namespace" 25 "github.com/m3db/m3/src/dbnode/x/xio" 26 "github.com/m3db/m3/src/x/context" 27 "github.com/m3db/m3/src/x/ident" 28 xtime "github.com/m3db/m3/src/x/time" 29 ) 30 31 type noopMergeWith struct{} 32 33 // NewNoopMergeWith creates a new noopMergeWith object. NoopMergeWith can be used 34 // in conjunction with the merge.Merger to generate copies of filesets. 35 func NewNoopMergeWith() MergeWith { 36 return &noopMergeWith{} 37 } 38 39 func (m *noopMergeWith) Read( 40 _ context.Context, 41 _ ident.ID, 42 _ xtime.UnixNano, 43 _ namespace.Context, 44 ) ([]xio.BlockReader, bool, error) { 45 return nil, false, nil 46 } 47 48 func (m *noopMergeWith) ForEachRemaining( 49 _ context.Context, 50 _ xtime.UnixNano, 51 _ ForEachRemainingFn, 52 _ namespace.Context, 53 ) error { 54 return nil 55 }