github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/services/caches/remove.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 caches
    19  
    20  import (
    21  	"fmt"
    22  	"github.com/aacfactory/errors"
    23  	"github.com/aacfactory/fns/commons/bytex"
    24  	"github.com/aacfactory/fns/context"
    25  	"github.com/aacfactory/fns/runtime"
    26  	"github.com/aacfactory/fns/services"
    27  )
    28  
    29  func Remove(ctx context.Context, param interface{}) (err error) {
    30  	if param == nil {
    31  		err = errors.Warning("fns: remove cache failed").WithCause(fmt.Errorf("param is nil"))
    32  		return
    33  	}
    34  	kp, ok := param.(KeyParam)
    35  	if !ok {
    36  		err = errors.Warning("fns: remove cache failed").WithCause(fmt.Errorf("param dose not implement caches.KeyParam"))
    37  		return
    38  	}
    39  	key, keyErr := kp.CacheKey(ctx)
    40  	if keyErr != nil {
    41  		err = errors.Warning("fns: remove cache failed").WithCause(keyErr)
    42  		return
    43  	}
    44  	eps := runtime.Endpoints(ctx)
    45  	_, doErr := eps.Request(ctx, endpointName, remFnName, removeFnParam{
    46  		Key: bytex.ToString(key),
    47  	}, services.WithInternalRequest())
    48  	if doErr != nil {
    49  		err = doErr
    50  		return
    51  	}
    52  	return
    53  }
    54  
    55  type removeFnParam struct {
    56  	Key string `json:"key" avro:"key"`
    57  }
    58  
    59  type removeFn struct {
    60  	store Store
    61  }
    62  
    63  func (fn *removeFn) Name() string {
    64  	return string(remFnName)
    65  }
    66  
    67  func (fn *removeFn) Internal() bool {
    68  	return true
    69  }
    70  
    71  func (fn *removeFn) Readonly() bool {
    72  	return false
    73  }
    74  
    75  func (fn *removeFn) Handle(r services.Request) (v interface{}, err error) {
    76  	if !r.Param().Valid() {
    77  		err = errors.Warning("fns: remove cache failed").WithCause(errors.Warning("param is invalid"))
    78  		return
    79  	}
    80  	param, paramErr := services.ValueOfParam[removeFnParam](r.Param())
    81  	if paramErr != nil {
    82  		err = errors.Warning("fns: remove cache failed").WithCause(paramErr)
    83  		return
    84  	}
    85  	key := bytex.FromString(param.Key)
    86  	if len(key) == 0 {
    87  		err = errors.Warning("fns: remove cache failed").WithCause(errors.Warning("param is invalid"))
    88  		return
    89  	}
    90  	removeErr := fn.store.Remove(r, key)
    91  	if removeErr != nil {
    92  		err = errors.Warning("fns: remove cache failed").WithCause(removeErr)
    93  		return
    94  	}
    95  	return
    96  }