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filestore.go
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filestore.go
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// Copyright 2023 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 stagelogstore
import (
"bufio"
"bytes"
"context"
"encoding/json"
"fmt"
"github.com/pipe-cd/pipecd/pkg/filestore"
"github.com/pipe-cd/pipecd/pkg/model"
)
var (
eol = []byte("EOL")
)
type stageLogFileStore struct {
filestore filestore.Store
}
func (f *stageLogFileStore) Get(ctx context.Context, deploymentID, stageID string, retriedCount int32) (logFragment, error) {
path := stageLogPath(deploymentID, stageID, retriedCount)
lf := logFragment{}
reader, err := f.filestore.GetReader(ctx, path)
if err != nil {
return lf, err
}
defer reader.Close()
blocks := make([]*model.LogBlock, 0)
scanner := bufio.NewScanner(reader)
completed := false
for scanner.Scan() {
data := scanner.Bytes()
if len(data) == 0 {
continue
}
if bytes.Equal(data, eol) {
completed = true
break
}
var lb model.LogBlock
if err := json.Unmarshal(data, &lb); err != nil {
return lf, err
}
blocks = append(blocks, &lb)
}
lf.Blocks = blocks
lf.Completed = completed
return lf, nil
}
func (f *stageLogFileStore) Put(ctx context.Context, deploymentID, stageID string, retriedCount int32, lf *logFragment) error {
path := stageLogPath(deploymentID, stageID, retriedCount)
var buf bytes.Buffer
for _, lb := range lf.Blocks {
// TODO: Reduce the number of marshaling log blocks for improving performance
raw, err := json.Marshal(lb)
if err != nil {
return err
}
buf.Write(raw)
buf.WriteString("\n")
}
if lf.Completed {
buf.Write(eol)
}
return f.filestore.Put(ctx, path, buf.Bytes())
}
func stageLogPath(deploymentID, stageID string, retriedCount int32) string {
return fmt.Sprintf("log/%s/%s/%d.txt", deploymentID, stageID, retriedCount)
}