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base_data_step.go
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/
base_data_step.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 bootstrapper
import (
"github.com/m3db/m3/src/dbnode/storage/bootstrap"
"github.com/m3db/m3/src/dbnode/storage/bootstrap/result"
"github.com/m3db/m3/src/dbnode/storage/namespace"
xlog "github.com/m3db/m3x/log"
)
type bootstrapDataStep interface {
bootstrapStep
result() result.DataBootstrapResult
}
type bootstrapData struct {
namespace namespace.Metadata
curr bootstrap.Source
next bootstrap.Bootstrapper
opts bootstrap.RunOptions
currResult result.DataBootstrapResult
nextResult result.DataBootstrapResult
mergedResult result.DataBootstrapResult
}
func newBootstrapDataStep(
namespace namespace.Metadata,
curr bootstrap.Source,
next bootstrap.Bootstrapper,
opts bootstrap.RunOptions,
) bootstrapDataStep {
return &bootstrapData{
namespace: namespace,
curr: curr,
next: next,
opts: opts,
}
}
func (s *bootstrapData) prepare(
totalRanges result.ShardTimeRanges,
) bootstrapStepPreparedResult {
return bootstrapStepPreparedResult{
currAvailable: s.curr.AvailableData(s.namespace, totalRanges),
}
}
func (s *bootstrapData) runCurrStep(
targetRanges result.ShardTimeRanges,
) (bootstrapStepStatus, error) {
var (
requested = targetRanges.Copy()
fulfilled result.ShardTimeRanges
logFields []xlog.Field
err error
)
s.currResult, err = s.curr.ReadData(s.namespace, targetRanges, s.opts)
if result := s.currResult; result != nil {
fulfilled = requested
fulfilled.Subtract(result.Unfulfilled())
logFields = append(logFields,
xlog.NewField("numSeries", result.ShardResults().NumSeries()))
}
return bootstrapStepStatus{
fulfilled: fulfilled,
logFields: logFields,
}, err
}
func (s *bootstrapData) runNextStep(
targetRanges result.ShardTimeRanges,
) (bootstrapStepStatus, error) {
var (
requested = targetRanges.Copy()
fulfilled result.ShardTimeRanges
err error
)
s.nextResult, err = s.next.BootstrapData(s.namespace, targetRanges, s.opts)
if result := s.nextResult; result != nil {
fulfilled = requested
fulfilled.Subtract(result.Unfulfilled())
}
return bootstrapStepStatus{
fulfilled: fulfilled,
}, err
}
func (s *bootstrapData) mergeResults(
totalUnfulfilled result.ShardTimeRanges,
) {
if s.mergedResult == nil {
s.mergedResult = result.NewDataBootstrapResult()
}
if s.currResult != nil {
// Merge the curr results in
s.mergedResult.ShardResults().AddResults(s.currResult.ShardResults())
s.currResult = nil
}
if s.nextResult != nil {
// Merge the next results in
s.mergedResult.ShardResults().AddResults(s.nextResult.ShardResults())
s.nextResult = nil
}
s.mergedResult.SetUnfulfilled(totalUnfulfilled)
}
func (s *bootstrapData) result() result.DataBootstrapResult {
return s.mergedResult
}