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chunkstore.go
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chunkstore.go
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// Copyright 2020 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 insightstore
import (
"context"
"encoding/json"
"errors"
"fmt"
"time"
"github.com/pipe-cd/pipecd/pkg/cache"
"github.com/pipe-cd/pipecd/pkg/filestore"
"github.com/pipe-cd/pipecd/pkg/insight"
"github.com/pipe-cd/pipecd/pkg/model"
)
type store struct {
filestore filestore.Store
}
func NewStore(fs filestore.Store) Store {
return &store{
filestore: fs,
}
}
// LoadChunks returns all needed chunks for the specified kind and time range.
func (s *store) LoadChunks(
ctx context.Context,
projectID, appID string,
kind model.InsightMetricsKind,
step model.InsightStep,
from time.Time,
count int,
) (insight.Chunks, error) {
from = insight.NormalizeTime(from, step)
paths := insight.DetermineFilePaths(projectID, appID, kind, step, from, count)
var chunks []insight.Chunk
for _, p := range paths {
c, err := s.getChunk(ctx, p, kind)
if err != nil {
return nil, err
}
chunks = append(chunks, c)
}
return chunks, nil
}
// PutChunk creates or updates chunk.
func (s *store) PutChunk(ctx context.Context, chunk insight.Chunk) error {
data, err := json.Marshal(chunk)
if err != nil {
return err
}
path := chunk.GetFilePath()
if path == "" {
return fmt.Errorf("filepath not found on chunk struct")
}
return s.filestore.Put(ctx, path, data)
}
func LoadChunksFromCache(cache cache.Cache, projectID, appID string, kind model.InsightMetricsKind, step model.InsightStep, from time.Time, count int) (insight.Chunks, error) {
paths := insight.DetermineFilePaths(projectID, appID, kind, step, from, count)
chunks := make([]insight.Chunk, 0, len(paths))
for _, p := range paths {
c, err := cache.Get(p)
if err != nil {
return nil, err
}
chunk, ok := c.(insight.Chunk)
if !ok {
return nil, errors.New("malformed chunk data in cache")
}
chunks = append(chunks, chunk)
}
return chunks, nil
}
func PutChunksToCache(cache cache.Cache, chunks insight.Chunks) error {
var err error
for _, c := range chunks {
// continue process even if an error occurs.
if e := cache.Put(c.GetFilePath(), c); e != nil {
err = e
}
}
return err
}
func (s *store) getChunk(ctx context.Context, path string, kind model.InsightMetricsKind) (insight.Chunk, error) {
var c interface{}
switch kind {
case model.InsightMetricsKind_DEPLOYMENT_FREQUENCY:
c = &insight.DeployFrequencyChunk{}
case model.InsightMetricsKind_CHANGE_FAILURE_RATE:
c = &insight.ChangeFailureRateChunk{}
default:
return nil, fmt.Errorf("unimpremented insight kind: %s", kind)
}
content, err := s.filestore.Get(ctx, path)
if err != nil {
return nil, err
}
err = json.Unmarshal(content, c)
if err != nil {
return nil, err
}
chunk, err := insight.ToChunk(c)
if err != nil {
return nil, err
}
chunk.SetFilePath(path)
return chunk, nil
}