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cleaner.go
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cleaner.go
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// Copyright 2021 The PipeCD Authors.
//
// 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 staledpipedstatcleaner
import (
"context"
"errors"
"fmt"
"time"
"go.uber.org/zap"
"github.com/pipe-cd/pipecd/pkg/cache"
"github.com/pipe-cd/pipecd/pkg/model"
)
const (
pipedStatStaledTimeout = 24 * time.Hour
interval = 24 * time.Hour
)
type StaledPipedStatCleaner struct {
backend cache.Cache
logger *zap.Logger
}
func NewStaledPipedStatCleaner(c cache.Cache, logger *zap.Logger) *StaledPipedStatCleaner {
return &StaledPipedStatCleaner{
backend: c,
logger: logger.Named("staled-piped-stat-cleaner"),
}
}
func (s *StaledPipedStatCleaner) Run(ctx context.Context) error {
s.logger.Info("start running StaledPipedStatCleaner")
t := time.NewTicker(interval)
for {
select {
case <-ctx.Done():
s.logger.Info("staledPipedStatCleaner has been stopped")
return nil
case <-t.C:
start := time.Now()
if err := s.flushStaledPipedStat(); err != nil {
s.logger.Error("failed to flush staled pipeds stat", zap.Error(err))
continue
}
s.logger.Info("successfully cleaned staled pipeds stat", zap.Duration("duration", time.Since(start)))
}
}
}
func (s *StaledPipedStatCleaner) flushStaledPipedStat() error {
res, err := s.backend.GetAll()
if err != nil {
// Ignore cache not found error since there are no stats found in cache
// means no need to flush anything.
if !errors.Is(err, cache.ErrNotFound) {
return fmt.Errorf("failed to fetch piped stats from cache: %w", err)
}
return nil
}
staled := make([]string, 0)
for k, v := range res {
ps := model.PipedStat{}
if err = model.UnmarshalPipedStat(v, &ps); err != nil {
return fmt.Errorf("failed to unmarshal piped stat data: %w", err)
}
if ps.IsStaled(pipedStatStaledTimeout) {
staled = append(staled, k)
}
}
s.logger.Info(fmt.Sprintf("there are %d staled pipeds stat to clean", len(staled)))
// No staled pipeds' stat found.
if len(staled) == 0 {
return nil
}
for _, id := range staled {
if err = s.backend.Delete(id); err != nil {
return fmt.Errorf("failed to remove staled piped stat data for pipedID (%s): %w", id, err)
}
}
return nil
}