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store.go
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store.go
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// Copyright 2022 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 unregisteredappstore
import (
"bytes"
"context"
"encoding/gob"
"errors"
"fmt"
"go.uber.org/zap"
"github.com/pipe-cd/pipecd/pkg/cache"
"github.com/pipe-cd/pipecd/pkg/cache/rediscache"
"github.com/pipe-cd/pipecd/pkg/model"
"github.com/pipe-cd/pipecd/pkg/redis"
)
type Store interface {
ListApplications(ctx context.Context, projectID string) ([]*model.ApplicationInfo, error)
PutApplications(projectID, pipedID string, apps []*model.ApplicationInfo) error
}
type store struct {
backend redis.Redis
logger *zap.Logger
}
func NewStore(r redis.Redis, logger *zap.Logger) Store {
return &store{
backend: r,
logger: logger,
}
}
func (c *store) ListApplications(_ context.Context, projectID string) ([]*model.ApplicationInfo, error) {
key := makeUnregisteredAppsCacheKey(projectID)
hc := rediscache.NewHashCache(c.backend, key)
// pipedToApps assumes to be a map["piped-id"][]byte(slice of *model.ApplicationInfo encoded by encoding/gob)
pipedToApps, err := hc.GetAll()
if errors.Is(err, cache.ErrNotFound) {
return []*model.ApplicationInfo{}, nil
}
if err != nil {
c.logger.Error("failed to get unregistered apps", zap.Error(err))
return nil, err
}
// Integrate all apps cached for each Piped.
allApps := make([]*model.ApplicationInfo, 0)
for _, as := range pipedToApps {
b, ok := as.([]byte)
if !ok {
return nil, errors.New("unexpected data cached")
}
dec := gob.NewDecoder(bytes.NewReader(b))
var apps []*model.ApplicationInfo
if err := dec.Decode(&apps); err != nil {
c.logger.Error("failed to decode the unregistered apps", zap.Error(err))
return nil, err
}
allApps = append(allApps, apps...)
}
return allApps, nil
}
func (c *store) PutApplications(projectID, pipedID string, apps []*model.ApplicationInfo) error {
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
if err := enc.Encode(apps); err != nil {
c.logger.Error("failed to encode the unregistered apps", zap.Error(err))
return err
}
key := makeUnregisteredAppsCacheKey(projectID)
hc := rediscache.NewHashCache(c.backend, key)
if err := hc.Put(pipedID, buf.Bytes()); err != nil {
return err
}
return nil
}
func makeUnregisteredAppsCacheKey(projectID string) string {
return fmt.Sprintf("HASHKEY:UNREGISTERED_APPS:%s", projectID)
}