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encoded_unconsolidated_series_iterator.go
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encoded_unconsolidated_series_iterator.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 m3db
import (
"time"
"github.com/m3db/m3/src/dbnode/encoding"
"github.com/m3db/m3/src/query/block"
xts "github.com/m3db/m3/src/query/ts"
)
type encodedSeriesIterUnconsolidated struct {
idx int
lookbackDuration time.Duration
err error
meta block.Metadata
series block.UnconsolidatedSeries
seriesMeta []block.SeriesMeta
seriesIters []encoding.SeriesIterator
}
func (b *encodedBlockUnconsolidated) SeriesIter() (
block.UnconsolidatedSeriesIter,
error,
) {
return &encodedSeriesIterUnconsolidated{
idx: -1,
meta: b.meta,
seriesMeta: b.seriesMetas,
seriesIters: b.seriesBlockIterators,
lookbackDuration: b.lookback,
}, nil
}
func (it *encodedSeriesIterUnconsolidated) Current() block.UnconsolidatedSeries {
return it.series
}
func (it *encodedSeriesIterUnconsolidated) Err() error {
return it.err
}
func (it *encodedSeriesIterUnconsolidated) Next() bool {
if it.err != nil {
return false
}
it.idx++
next := it.idx < len(it.seriesIters)
if !next {
return false
}
iter := it.seriesIters[it.idx]
values := make(xts.Datapoints, 0, initBlockReplicaLength)
for iter.Next() {
dp, _, _ := iter.Current()
values = append(values,
xts.Datapoint{
Timestamp: dp.Timestamp,
Value: dp.Value,
})
}
if it.err = iter.Err(); it.err != nil {
return false
}
alignedValues := values.AlignToBoundsNoWriteForward(it.meta.Bounds, it.lookbackDuration)
it.series = block.NewUnconsolidatedSeries(alignedValues, it.seriesMeta[it.idx])
return next
}
func (it *encodedSeriesIterUnconsolidated) SeriesCount() int {
return len(it.seriesIters)
}
func (it *encodedSeriesIterUnconsolidated) SeriesMeta() []block.SeriesMeta {
return it.seriesMeta
}
func (it *encodedSeriesIterUnconsolidated) Meta() block.Metadata {
return it.meta
}
func (it *encodedSeriesIterUnconsolidated) Close() {
// noop, as the resources at the step may still be in use;
// instead call Close() on the encodedBlock that generated this
}