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slice.go
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slice.go
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// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package indexer
import (
"github.com/couchbase/indexing/secondary/common"
)
type SliceId uint64
type SliceStatus int16
const (
//Slice is warming up(open db files etc), not ready for operations
SLICE_STATUS_PREPARING SliceStatus = iota
//Ready for operations
SLICE_STATUS_ACTIVE
//Marked for deletion
SLICE_STATUS_TERMINATE
)
//Slice represents the unit of physical storage for index
type Slice interface {
Id() SliceId
Path() string
Status() SliceStatus
IndexInstId() common.IndexInstId
IndexDefnId() common.IndexDefnId
IsActive() bool
IsDirty() bool
SetActive(bool)
SetStatus(SliceStatus)
UpdateConfig(common.Config)
IndexWriter
GetReaderContext() IndexReaderContext
}
// cursorCtx implements IndexReaderContext and is used
// for tracking previous cursor key for multiple scans
// for distinct rows
type cursorCtx struct {
cursor *[]byte
}
func (ctx *cursorCtx) Init() {
}
func (ctx *cursorCtx) Done() {
}
func (ctx *cursorCtx) SetCursorKey(cur *[]byte) {
ctx.cursor = cur
}
func (ctx *cursorCtx) GetCursorKey() *[]byte {
return ctx.cursor
}