github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/transports/middlewares/cachecontrol/cache.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package cachecontrol
    19  
    20  import (
    21  	"github.com/aacfactory/errors"
    22  	"github.com/aacfactory/fns/context"
    23  	"github.com/aacfactory/fns/runtime"
    24  	"time"
    25  )
    26  
    27  type Cache interface {
    28  	Get(ctx context.Context, key []byte) (value []byte, has bool, err error)
    29  	Set(ctx context.Context, key []byte, value []byte, ttl time.Duration) (err error)
    30  	Close()
    31  }
    32  
    33  var (
    34  	cacheKeyPrefix = []byte("fns:cachecontrol:")
    35  )
    36  
    37  type DefaultCache struct{}
    38  
    39  func (cache *DefaultCache) Get(ctx context.Context, key []byte) (value []byte, has bool, err error) {
    40  	store := runtime.SharedStore(ctx)
    41  	value, has, err = store.Get(ctx, append(cacheKeyPrefix, key...))
    42  	if err != nil {
    43  		err = errors.Warning("fns: cache control store get failed").WithCause(err)
    44  		return
    45  	}
    46  	return
    47  }
    48  
    49  func (cache *DefaultCache) Set(ctx context.Context, key []byte, value []byte, ttl time.Duration) (err error) {
    50  	store := runtime.SharedStore(ctx)
    51  	err = store.SetWithTTL(ctx, append(cacheKeyPrefix, key...), value, ttl)
    52  	if err != nil {
    53  		err = errors.Warning("fns: cache control store set failed").WithCause(err)
    54  		return
    55  	}
    56  	return
    57  }
    58  
    59  func (cache *DefaultCache) Close() {
    60  }