harness-drone/store/logs/combine.go
Brad Rydzewski 7aba4b8234 fixes #2689
2019-05-30 09:11:01 -07:00

61 lines
1.7 KiB
Go

// Copyright 2019 Drone IO, Inc.
//
// 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 logs
import (
"context"
"io"
"github.com/drone/drone/core"
)
// NewCombined returns a new combined log store that will fallback
// to a secondary log store when necessary. This can be useful when
// migrating from database logs to s3, where logs for older builds
// are still being stored in the database, and newer logs in s3.
func NewCombined(primary, secondary core.LogStore) core.LogStore {
return &combined{
primary: primary,
secondary: secondary,
}
}
type combined struct {
primary, secondary core.LogStore
}
func (s *combined) Find(ctx context.Context, step int64) (io.ReadCloser, error) {
rc, err := s.primary.Find(ctx, step)
if err == nil {
return rc, err
}
return s.secondary.Find(ctx, step)
}
func (s *combined) Create(ctx context.Context, step int64, r io.Reader) error {
return s.primary.Create(ctx, step, r)
}
func (s *combined) Update(ctx context.Context, step int64, r io.Reader) error {
return s.primary.Update(ctx, step, r)
}
func (s *combined) Delete(ctx context.Context, step int64) error {
err := s.primary.Delete(ctx, step)
if err != nil {
err = s.secondary.Delete(ctx, step)
}
return err
}