github.com/vicanso/pike@v1.0.1-0.20210630235453-9099e041f6ec/util/util.go (about)

     1  // MIT License
     2  
     3  // Copyright (c) 2020 Tree Xie
     4  
     5  // Permission is hereby granted, free of charge, to any person obtaining a copy
     6  // of this software and associated documentation files (the "Software"), to deal
     7  // in the Software without restriction, including without limitation the rights
     8  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     9  // copies of the Software, and to permit persons to whom the Software is
    10  // furnished to do so, subject to the following conditions:
    11  
    12  // The above copyright notice and this permission notice shall be included in all
    13  // copies or substantial portions of the Software.
    14  
    15  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    16  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    17  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    18  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    19  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    20  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    21  // SOFTWARE.
    22  
    23  package util
    24  
    25  import (
    26  	"sync"
    27  
    28  	"github.com/vicanso/hes"
    29  )
    30  
    31  const errCategory = "pike"
    32  
    33  type DeleteMatch func(string) bool
    34  
    35  // MapDelete delete item form sync map
    36  func MapDelete(m *sync.Map, match DeleteMatch) []interface{} {
    37  	result := make([]interface{}, 0)
    38  	// m.Range中是先复制了仅读，因此可以直接在此处删除
    39  	m.Range(func(k, _ interface{}) bool {
    40  		key, ok := k.(string)
    41  		if !ok {
    42  			return true
    43  		}
    44  		// 如果不匹配，则不需要删除
    45  		if !match(key) {
    46  			return true
    47  		}
    48  
    49  		value, loaded := m.LoadAndDelete(key)
    50  		if loaded {
    51  			result = append(result, value)
    52  		}
    53  		return true
    54  	})
    55  
    56  	return result
    57  }
    58  
    59  // NewError create a new http error
    60  func NewError(message string, statusCode int) error {
    61  	return &hes.Error{
    62  		Message:    message,
    63  		StatusCode: statusCode,
    64  		Category:   errCategory,
    65  	}
    66  }