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read_context.go
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/
read_context.go
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/*
Copyright 2022 Huawei Cloud Computing Technologies Co., Ltd.
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 immutable
import (
"sync/atomic"
"github.com/openGemini/openGemini/engine/comm"
"github.com/openGemini/openGemini/lib/bufferpool"
"github.com/openGemini/openGemini/lib/encoding"
"github.com/openGemini/openGemini/lib/fileops"
"github.com/openGemini/openGemini/lib/record"
"github.com/openGemini/openGemini/lib/tracing"
"github.com/openGemini/openGemini/lib/util"
)
type ReadContext struct {
coderCtx *encoding.CoderContext
preAggBuilders *PreAggBuilders
decBuf []byte
offset []uint32
col record.ColVal
ops []*comm.CallOption
tr util.TimeRange
Ascending bool
onlyFirstOrLast bool
origData []byte
readBuf []byte
readSpan *tracing.Span
filterSpan *tracing.Span
closedSignal *int32
}
func NewReadContext(ascending bool) *ReadContext {
var readBuf []byte
if !fileops.MmapEn {
readBuf = bufferpool.Get()
}
b := bufferpool.Get()
return &ReadContext{
coderCtx: encoding.NewCoderContext(),
preAggBuilders: newPreAggBuilders(),
decBuf: b[:0],
Ascending: ascending,
tr: record.MinMaxTimeRange,
readBuf: readBuf,
}
}
func (d *ReadContext) SetClosedSignal(s *int32) {
d.closedSignal = s
}
func (d *ReadContext) isAborted() bool {
if d.closedSignal == nil {
return false
}
return atomic.LoadInt32(d.closedSignal) > 0
}
func (d *ReadContext) SetSpan(readSpan, filterSpan *tracing.Span) {
d.readSpan = readSpan
d.filterSpan = filterSpan
}
func (d *ReadContext) GetOps() []*comm.CallOption {
return d.ops
}
func (d *ReadContext) SetOps(c []*comm.CallOption) {
d.ops = c
}
func (d *ReadContext) MatchPreAgg() bool {
return len(d.ops) > 0
}
func (d *ReadContext) Set(ascending bool, tr util.TimeRange, onlyFirstOrLast bool, ops []*comm.CallOption) {
d.Ascending = ascending
d.tr = tr
d.onlyFirstOrLast = onlyFirstOrLast
d.ops = ops
}
func (d *ReadContext) Reset() {}
func (d *ReadContext) Release() {
if d.coderCtx != nil {
d.coderCtx.Release()
d.coderCtx = nil
}
if d.decBuf != nil {
d.decBuf = d.decBuf[:0]
bufferpool.Put(d.decBuf)
d.decBuf = nil
}
if d.preAggBuilders != nil {
d.preAggBuilders.Release()
d.preAggBuilders = nil
}
if d.readBuf != nil {
bufferpool.Put(d.readBuf)
d.readBuf = nil
}
}
func (d *ReadContext) SetTr(tr util.TimeRange) {
d.tr = tr
}
func (d *ReadContext) InitPreAggBuilder() {
d.preAggBuilders = newPreAggBuilders()
}
func (d *ReadContext) GetReadBuff() []byte {
return d.readBuf
}
func (d *ReadContext) GetCoder() *encoding.CoderContext {
return d.coderCtx
}