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storage.go
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storage.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package filter
import "github.com/m3db/m3/src/query/storage"
// Storage determines whether storage can fulfil the query
type Storage func(query storage.Query, store storage.Storage) bool
// LocalOnly filters out all remote storages
func LocalOnly(_ storage.Query, store storage.Storage) bool {
return store.Type() == storage.TypeLocalDC
}
// RemoteOnly filters out any non-remote storages
func RemoteOnly(_ storage.Query, store storage.Storage) bool {
return store.Type() == storage.TypeRemoteDC
}
// AllowAll does not filter any storages
func AllowAll(_ storage.Query, _ storage.Storage) bool {
return true
}
// AllowNone filters all storages
func AllowNone(_ storage.Query, _ storage.Storage) bool {
return false
}
// StorageCompleteTags determines whether storage can fulfil the complete tag query
type StorageCompleteTags func(query storage.CompleteTagsQuery, store storage.Storage) bool
// CompleteTagsLocalOnly filters out all remote storages
func CompleteTagsLocalOnly(_ storage.CompleteTagsQuery, store storage.Storage) bool {
return store.Type() == storage.TypeLocalDC
}
// CompleteTagsRemoteOnly filters out any non-remote storages
func CompleteTagsRemoteOnly(_ storage.CompleteTagsQuery, store storage.Storage) bool {
return store.Type() == storage.TypeRemoteDC
}
// CompleteTagsAllowAll does not filter any storages
func CompleteTagsAllowAll(_ storage.CompleteTagsQuery, _ storage.Storage) bool {
return true
}
// CompleteTagsAllowNone filters all storages
func CompleteTagsAllowNone(_ storage.CompleteTagsQuery, _ storage.Storage) bool {
return false
}