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cache.go
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cache.go
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/*
* Copyright 2023 Wang Min Xiang
*
* 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 caches
import (
"github.com/aacfactory/errors"
"github.com/aacfactory/fns/context"
"github.com/aacfactory/fns/runtime"
"github.com/aacfactory/fns/services"
"github.com/aacfactory/logs"
"time"
)
type KeyParam interface {
CacheKey(ctx context.Context) (key []byte, err error)
}
type Store interface {
services.Component
Get(ctx context.Context, key []byte) (value []byte, has bool, err error)
Set(ctx context.Context, key []byte, value []byte, ttl time.Duration) (err error)
Remove(ctx context.Context, key []byte) (err error)
}
type defaultStore struct {
log logs.Logger
prefix []byte
}
func (store *defaultStore) Name() (name string) {
return "default"
}
func (store *defaultStore) Construct(options services.Options) (err error) {
store.log = options.Log
store.prefix = []byte("fns:caches:")
return
}
func (store *defaultStore) Shutdown(_ context.Context) {
return
}
func (store *defaultStore) Get(ctx context.Context, key []byte) (value []byte, has bool, err error) {
st := runtime.SharedStore(ctx)
value, has, err = st.Get(ctx, append(store.prefix, key...))
if err != nil {
err = errors.Warning("fns: get cache failed").WithMeta("key", string(key)).WithCause(err)
return
}
return
}
func (store *defaultStore) Set(ctx context.Context, key []byte, value []byte, ttl time.Duration) (err error) {
st := runtime.SharedStore(ctx)
err = st.SetWithTTL(ctx, append(store.prefix, key...), value, ttl)
if err != nil {
err = errors.Warning("fns: set cache failed").WithMeta("key", string(key)).WithCause(err)
return
}
return
}
func (store *defaultStore) Remove(ctx context.Context, key []byte) (err error) {
st := runtime.SharedStore(ctx)
err = st.Remove(ctx, append(store.prefix, key...))
if err != nil {
err = errors.Warning("fns: remove cache failed").WithMeta("key", string(key)).WithCause(err)
return
}
return
}